Address/memory/thread sanitizer.

Add path test windows and escape in double quote.
Add path test windows.
2026-02-27 20:11:17 +00:00 · 2024-08-21 16:01:45 +02:00 · 2024-08-21 10:37:50 +02:00 · 2024-08-21 10:15:45 +02:00 · 2024-08-20 22:42:38 +02:00 · 2024-08-20 22:42:01 +02:00
324 changed files with 20322 additions and 13149 deletions
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -4,11 +4,14 @@ on:
  push:
    branches: [ master, dev, ci_testing, experiments ]
  pull_request:
-    branches: [ master ]
+    branches: [ master, dev ]

 env:
-  LLVM_RELEASE_VERSION: 16
-
+  LLVM_RELEASE_VERSION_WINDOWS: 18
+  LLVM_RELEASE_VERSION_MAC: 18
+  LLVM_RELEASE_VERSION_LINUX: 17
+  LLVM_RELEASE_VERSION_UBUNTU20: 17
+  LLVM_DEV_VERSION: 20
 jobs:

  build-msvc:
@@ -33,28 +36,31 @@ jobs:
      - name: Compile and run some examples
        run: |
          cd resources
-          ..\build\${{ matrix.build_type }}\c3c.exe compile-run --print-linking examples\hello_world_many.c3
+          ..\build\${{ matrix.build_type }}\c3c.exe compile-run -L C:\ --print-linking examples\hello_world_many.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run --print-linking examples\time.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run --print-linking examples\fannkuch-redux.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run examples\contextfree\boolerr.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run examples\ls.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run examples\load_world.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run examples\process.c3
-          ..\build\${{ matrix.build_type }}\c3c.exe compile --test -g -O0 --threads 1 --target macos-x64 examples\constants.c3                  
+          ..\build\${{ matrix.build_type }}\c3c.exe compile-run examples\args.c3 -- foo -bar "baz baz"
+          ..\build\${{ matrix.build_type }}\c3c.exe compile --no-entry --test -g -O0 --threads 1 --target macos-x64 examples\constants.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile-run msvc_stack.c3

      - name: Build testproject
        run: |
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
          cd resources/testproject
          ..\..\build\${{ matrix.build_type }}\c3c.exe --debug-log --emit-llvm run hello_world_win32
          dir build\llvm_ir
          ..\..\build\${{ matrix.build_type }}\c3c.exe clean
          dir build\llvm_ir
-          
+

      - name: Build testproject lib
        run: |
          cd resources/testproject
+          call "C:\Program Files\Microsoft Visual Studio\2022\Enterprise\VC\Auxiliary\Build\vcvarsall.bat" x64
          ..\..\build\${{ matrix.build_type }}\c3c.exe --debug-log build hello_world_win32_lib

      - name: Vendor-fetch
@@ -64,7 +70,7 @@ jobs:
      - name: Try raylib
        run: |
          cd resources
-          ..\build\${{ matrix.build_type }}\c3c.exe vendor-fetch raylib          
+          ..\build\${{ matrix.build_type }}\c3c.exe vendor-fetch raylib
          ..\build\${{ matrix.build_type }}\c3c.exe compile --lib raylib --wincrt=none examples\raylib\raylib_arkanoid.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile --lib raylib --wincrt=none examples\raylib\raylib_snake.c3
          ..\build\${{ matrix.build_type }}\c3c.exe compile --lib raylib --wincrt=none examples\raylib\raylib_tetris.c3
@@ -88,7 +94,9 @@ jobs:
        uses: actions/upload-artifact@v3
        with:
          name: c3-windows-${{ matrix.build_type }}
-          path: build\${{ matrix.build_type }}\c3c.exe
+          path: |
+            build\${{ matrix.build_type }}\c3c.exe
+            build\${{ matrix.build_type }}\c3c_rt

  build-msys2-mingw:
    runs-on: windows-latest
@@ -112,8 +120,8 @@ jobs:
          install: git binutils mingw-w64-x86_64-clang mingw-w64-x86_64-ninja mingw-w64-x86_64-cmake mingw-w64-x86_64-toolchain mingw-w64-x86_64-python
      - shell: msys2 {0}
        run: |
-            pacman --noconfirm -U https://mirror.msys2.org/mingw/mingw64/mingw-w64-x86_64-llvm-18.1.6-1-any.pkg.tar.zst
-            pacman --noconfirm -U https://mirror.msys2.org/mingw/mingw64/mingw-w64-x86_64-lld-18.1.6-1-any.pkg.tar.zst
+            pacman --noconfirm -U https://mirror.msys2.org/mingw/mingw64/mingw-w64-x86_64-llvm-18.1.8-1-any.pkg.tar.zst
+            pacman --noconfirm -U https://mirror.msys2.org/mingw/mingw64/mingw-w64-x86_64-lld-18.1.8-1-any.pkg.tar.zst
      - name: CMake
        run: |
          cmake -B build -G Ninja -DCMAKE_C_COMPILER=clang -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
@@ -127,7 +135,8 @@ jobs:
          ../build/c3c compile-run --print-linking examples/fannkuch-redux.c3
          ../build/c3c compile-run --print-linking examples/contextfree/boolerr.c3
          ../build/c3c compile-run --print-linking examples/load_world.c3
-          ../build/c3c compile --test -g -O0 --threads 1 --target macos-x64 examples/constants.c3
+          ../build/c3c compile-run --print-linking examples/args.c3 -- foo -bar "baz baz"
+          ../build/c3c compile --no-entry --test -g -O0 --threads 1 --target macos-x64 examples/constants.c3

      - name: Build testproject
        run: |
@@ -141,7 +150,7 @@ jobs:
      - name: Build testproject lib
        run: |
          cd resources/testproject
-          ../../build/c3c build hello_world_lib --debug-log
+          ../../build/c3c build hello_world_lib --cc cc --debug-log

      - name: run compiler tests
        run: |
@@ -183,7 +192,8 @@ jobs:
          ../build/c3c compile-run examples/fannkuch-redux.c3
          ../build/c3c compile-run examples/contextfree/boolerr.c3
          ../build/c3c compile-run examples/load_world.c3
-          ../build/c3c compile --test -g -O0 --threads 1 --target macos-x64 examples/constants.c3
+          ../build/c3c compile-run examples/args.c3 -- foo -bar "baz baz"
+          ../build/c3c compile --no-entry --test -g -O0 --threads 1 --target macos-x64 examples/constants.c3
      - name: Build testproject
        run: |
          cd resources/testproject
@@ -206,7 +216,7 @@ jobs:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
-        llvm_version: [15, 16, 17, 18, 19]
+        llvm_version: [17, 18, 19, 20]

    steps:
      - uses: actions/checkout@v4
@@ -217,25 +227,29 @@ jobs:
      - name: Install Clang ${{matrix.llvm_version}}
        run: |
          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-          if [[ "${{matrix.llvm_version}}" < 16 ]]; then
-            sudo apt remove libllvm15
-          fi
-          if [[ "${{matrix.llvm_version}}" < 19 ]]; then
+          if [[ "${{matrix.llvm_version}}" < 18 ]]; then
            sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${{matrix.llvm_version}} main"
            sudo apt-get update
            sudo apt-get install -y -t llvm-toolchain-focal-${{matrix.llvm_version}} libpolly-${{matrix.llvm_version}}-dev \
              clang-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}}-dev \
              lld-${{matrix.llvm_version}} liblld-${{matrix.llvm_version}}-dev libmlir-${{matrix.llvm_version}} \
-              libmlir-${{matrix.llvm_version}}-dev mlir-${{matrix.llvm_version}}-tools 
+              libmlir-${{matrix.llvm_version}}-dev mlir-${{matrix.llvm_version}}-tools
          else
-            sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main"
-            sudo apt-get install -y -t llvm-toolchain-focal libpolly-${{matrix.llvm_version}}-dev \
-              clang-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}}-dev \
-              lld-${{matrix.llvm_version}} liblld-${{matrix.llvm_version}}-dev libmlir-${{matrix.llvm_version}} \
-              libmlir-${{matrix.llvm_version}}-dev mlir-${{matrix.llvm_version}}-tools 
+            if [[ "${{matrix.llvm_version}}" < "${{env.LLVM_DEV_VERSION}}" ]]; then
+              sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${{matrix.llvm_version}} main"
+              sudo apt-get update
+              sudo apt-get install -y -t llvm-toolchain-focal-${{matrix.llvm_version}} libpolly-${{matrix.llvm_version}}-dev \
+                clang-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}}-dev \
+                lld-${{matrix.llvm_version}} liblld-${{matrix.llvm_version}}-dev
+            else
+              sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main"
+              sudo apt-get install -y -t llvm-toolchain-focal libpolly-${{matrix.llvm_version}}-dev \
+                clang-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}}-dev \
+                lld-${{matrix.llvm_version}} liblld-${{matrix.llvm_version}}-dev
+            fi
          fi
      - name: CMake
-        if: matrix.llvm_version != 18
+        if: matrix.llvm_version < 18 || matrix.llvm_version == env.LLVM_DEV_VERSION
        run: |
          cmake -B build \
                -G Ninja \
@@ -249,7 +263,7 @@ jobs:
                -DC3_LLVM_VERSION=${{matrix.llvm_version}}
          cmake --build build
      - name: CMake18
-        if: matrix.llvm_version == 18
+        if: matrix.llvm_version >= 18 && matrix.llvm_version != env.LLVM_DEV_VERSION
        run: |
          cmake -B build \
                -G Ninja \
@@ -260,12 +274,12 @@ jobs:
                -DCMAKE_OBJCOPY=llvm-objcopy-${{matrix.llvm_version}} \
                -DCMAKE_STRIP=llvm-strip-${{matrix.llvm_version}} \
                -DCMAKE_DLLTOOL=llvm-dlltool-${{matrix.llvm_version}} \
-                -DC3_LLVM_VERSION=18.1
+                -DC3_LLVM_VERSION=${{matrix.llvm_version}}.1
          cmake --build build

      - name: Compile and run some examples
        run: |
-          cd resources            
+          cd resources
          ../build/c3c compile examples/base64.c3
          ../build/c3c compile examples/binarydigits.c3
          ../build/c3c compile examples/brainfk.c3
@@ -273,9 +287,9 @@ jobs:
          ../build/c3c compile examples/fasta.c3
          ../build/c3c compile examples/gameoflife.c3
          ../build/c3c compile examples/hash.c3
-          ../build/c3c compile examples/levenshtein.c3
+          ../build/c3c compile-only examples/levenshtein.c3
          ../build/c3c compile examples/load_world.c3
-          ../build/c3c compile examples/map.c3
+          ../build/c3c compile-only examples/map.c3
          ../build/c3c compile examples/mandelbrot.c3
          ../build/c3c compile examples/plus_minus.c3
          ../build/c3c compile examples/nbodies.c3
@@ -284,8 +298,8 @@ jobs:
          ../build/c3c compile examples/contextfree/boolerr.c3
          ../build/c3c compile examples/contextfree/dynscope.c3
          ../build/c3c compile examples/contextfree/guess_number.c3
-          ../build/c3c compile examples/contextfree/multi.c3          
-          ../build/c3c compile examples/contextfree/cleanup.c3  
+          ../build/c3c compile examples/contextfree/multi.c3
+          ../build/c3c compile examples/contextfree/cleanup.c3
          ../build/c3c compile-run examples/hello_world_many.c3
          ../build/c3c compile-run examples/time.c3
          ../build/c3c compile-run examples/fannkuch-redux.c3
@@ -295,6 +309,7 @@ jobs:
          ../build/c3c compile-run examples/ls.c3
          ../build/c3c compile-run --linker=builtin linux_stack.c3
          ../build/c3c compile-run linux_stack.c3
+          ../build/c3c compile-run examples/args.c3 -- foo -bar "baz baz"

      - name: Compile run unit tests
        run: |
@@ -306,27 +321,48 @@ jobs:
          cd resources/testproject
          ../../build/c3c run --debug-log

+      - name: Test WASM
+        run: |
+          cd resources/testfragments
+          ../../build/c3c compile --reloc=none --target wasm32 -g0 --link-libc=no --no-entry -Os wasm4.c3
+
+      - name: Install QEMU and Risc-V toolchain
+        run: |
+          sudo apt-get install opensbi qemu-system-misc u-boot-qemu gcc-riscv64-unknown-elf
+
+      - name: Compile and run Baremetal Risc-V Example
+        run: |
+          cd resources/examples/embedded/riscv-qemu
+          make C3C_PATH=../../../../build/ run
+
      - name: Build testproject direct linker
        run: |
          cd resources/testproject
          ../../build/c3c run --debug-log --linker=builtin

+      - name: Init a library & a project
+        run: |
+          ./build/c3c init-lib mylib
+          ls mylib.c3l
+          ./build/c3c init myproject
+          ls myproject
+
      - name: run compiler tests
        run: |
          cd test
          python3 src/tester.py ../build/c3c test_suite/

      - name: bundle_output
-        if: matrix.llvm_version == 16
+        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION_LINUX
        run: |
-          mkdir linux
-          cp -r lib linux
-          cp msvc_build_libraries.py linux
-          cp build/c3c linux
-          tar czf c3-linux-${{matrix.build_type}}.tar.gz linux
+          mkdir c3
+          cp -r lib c3
+          cp msvc_build_libraries.py c3
+          cp build/c3c c3
+          tar czf c3-linux-${{matrix.build_type}}.tar.gz c3

      - name: upload artifacts
-        if: matrix.llvm_version == 16
+        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION_LINUX
        uses: actions/upload-artifact@v3
        with:
          name: c3-linux-${{matrix.build_type}}
@@ -339,8 +375,7 @@ jobs:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
-        llvm_version: [16]
-
+        llvm_version: [17, 18, 19]
    steps:
      - uses: actions/checkout@v4
      - name: Install common deps
@@ -350,16 +385,17 @@ jobs:
      - name: Install Clang ${{matrix.llvm_version}}
        run: |
          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-          if [[ "${{matrix.llvm_version}}" < 17 ]]; then
+          if [[ "${{matrix.llvm_version}}" < "${{env.LLVM_DEV_VERSION}}" ]]; then
            sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${{matrix.llvm_version}} main"
          else
            sudo add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main"
          fi
-          sudo apt-get update      
+          sudo apt-get update
          sudo apt-get install -y clang-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}} llvm-${{matrix.llvm_version}}-dev lld-${{matrix.llvm_version}} liblld-${{matrix.llvm_version}}-dev
-          sudo apt-get install -y libmlir-${{matrix.llvm_version}} libmlir-${{matrix.llvm_version}}-dev mlir-${{matrix.llvm_version}}-tools 
+          sudo apt-get install -y libmlir-${{matrix.llvm_version}} libmlir-${{matrix.llvm_version}}-dev mlir-${{matrix.llvm_version}}-tools
          sudo apt-get install -y libpolly-${{matrix.llvm_version}}-dev
-      - name: CMake
+      - name: CMake Old
+        if: matrix.llvm_version < 18 || matrix.llvm_version == env.LLVM_DEV_VERSION
        run: |
          cmake -B build \
                -G Ninja \
@@ -372,13 +408,26 @@ jobs:
                -DCMAKE_DLLTOOL=llvm-dlltool-${{matrix.llvm_version}} \
                -DC3_LLVM_VERSION=${{matrix.llvm_version}}
          cmake --build build
-
+      - name: CMake
+        if: matrix.llvm_version >= 18 && matrix.llvm_version != env.LLVM_DEV_VERSION
+        run: |
+          cmake -B build \
+                -G Ninja \
+                -DCMAKE_BUILD_TYPE=${{matrix.build_type}} \
+                -DCMAKE_C_COMPILER=clang-${{matrix.llvm_version}} \
+                -DCMAKE_CXX_COMPILER=clang++-${{matrix.llvm_version}} \
+                -DCMAKE_LINKER=lld-link-${{matrix.llvm_version}} \
+                -DCMAKE_OBJCOPY=llvm-objcopy-${{matrix.llvm_version}} \
+                -DCMAKE_STRIP=llvm-strip-${{matrix.llvm_version}} \
+                -DCMAKE_DLLTOOL=llvm-dlltool-${{matrix.llvm_version}} \
+                -DC3_LLVM_VERSION=${{matrix.llvm_version}}.1
+          cmake --build build
      - name: Compile and run some examples
        run: |
          cd resources
          ../build/c3c compile examples/gameoflife.c3
-          ../build/c3c compile examples/levenshtein.c3
-          ../build/c3c compile examples/map.c3
+          ../build/c3c compile-only examples/levenshtein.c3
+          ../build/c3c compile-only examples/map.c3
          ../build/c3c compile examples/mandelbrot.c3
          ../build/c3c compile examples/plus_minus.c3
          ../build/c3c compile examples/spectralnorm.c3
@@ -388,8 +437,8 @@ jobs:
          ../build/c3c compile-run examples/nbodies.c3
          ../build/c3c compile-run examples/contextfree/boolerr.c3
          ../build/c3c compile-run examples/contextfree/dynscope.c3
-          ../build/c3c compile-run examples/contextfree/multi.c3          
-          ../build/c3c compile-run examples/contextfree/cleanup.c3          
+          ../build/c3c compile-run examples/contextfree/multi.c3
+          ../build/c3c compile-run examples/contextfree/cleanup.c3
          ../build/c3c compile-run examples/hello_world_many.c3
          ../build/c3c compile-run examples/time.c3
          ../build/c3c compile-run examples/fannkuch-redux.c3
@@ -402,6 +451,7 @@ jobs:
          ../build/c3c compile-run examples/process.c3
          ../build/c3c compile-run --linker=builtin linux_stack.c3
          ../build/c3c compile-run linux_stack.c3
+          ../build/c3c compile-run examples/args.c3 -- foo -bar "baz baz"

      - name: Compile run unit tests
        run: |
@@ -424,20 +474,108 @@ jobs:
          python3 src/tester.py ../build/c3c test_suite/

      - name: bundle_output
-        if: matrix.llvm_version == 16
+        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION_UBUNTU20
        run: |
-          mkdir linux
-          cp -r lib linux
-          cp msvc_build_libraries.py linux
-          cp build/c3c linux
-          tar czf c3-ubuntu-20-${{matrix.build_type}}.tar.gz linux
+          mkdir c3
+          cp -r lib c3
+          cp msvc_build_libraries.py c3
+          cp build/c3c c3
+          tar czf c3-ubuntu-20-${{matrix.build_type}}.tar.gz c3

      - name: upload artifacts
-        if: matrix.llvm_version == 16
+        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION_UBUNTU20
        uses: actions/upload-artifact@v3
        with:
          name: c3-ubuntu-20-${{matrix.build_type}}
          path: c3-ubuntu-20-${{matrix.build_type}}.tar.gz
+  
+  build-with-docker:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        ubuntu_version: [20.04, 22.04]
+        build_type: [Release, Debug]
+        llvm_version: [17, 18, 19, 20]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Setup Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Make script executable
+        run: chmod +x ./build-with-docker.sh
+
+      - name: Run build
+        run: |
+          LLVM_VERSION=${{ matrix.llvm_version }} UBUNTU_VERSION=${{ matrix.ubuntu_version }} CMAKE_BUILD_TYPE=${{ matrix.build_type }} ./build-with-docker.sh
+      
+      - name: Compile and run some examples
+        run: |
+          cd resources
+          ../build/c3c compile examples/base64.c3
+          ../build/c3c compile examples/binarydigits.c3
+          ../build/c3c compile examples/brainfk.c3
+          ../build/c3c compile examples/factorial_macro.c3
+          ../build/c3c compile examples/fasta.c3
+          ../build/c3c compile examples/gameoflife.c3
+          ../build/c3c compile examples/hash.c3
+          ../build/c3c compile-only examples/levenshtein.c3
+          ../build/c3c compile examples/load_world.c3
+          ../build/c3c compile-only examples/map.c3
+          ../build/c3c compile examples/mandelbrot.c3
+          ../build/c3c compile examples/plus_minus.c3
+          ../build/c3c compile examples/nbodies.c3
+          ../build/c3c compile examples/spectralnorm.c3
+          ../build/c3c compile examples/swap.c3
+          ../build/c3c compile examples/contextfree/boolerr.c3
+          ../build/c3c compile examples/contextfree/dynscope.c3
+          ../build/c3c compile examples/contextfree/guess_number.c3
+          ../build/c3c compile examples/contextfree/multi.c3
+          ../build/c3c compile examples/contextfree/cleanup.c3
+          ../build/c3c compile-run examples/hello_world_many.c3
+          ../build/c3c compile-run examples/time.c3
+          ../build/c3c compile-run examples/fannkuch-redux.c3
+          ../build/c3c compile-run examples/contextfree/boolerr.c3
+          ../build/c3c compile-run examples/load_world.c3
+          ../build/c3c compile-run examples/process.c3
+          ../build/c3c compile-run examples/ls.c3
+          ../build/c3c compile-run --linker=builtin linux_stack.c3
+          ../build/c3c compile-run linux_stack.c3
+          ../build/c3c compile-run examples/args.c3 -- foo -bar "baz baz"
+
+      - name: Compile run unit tests
+        run: |
+          cd test
+          ../build/c3c compile-test unit
+
+      - name: Build testproject
+        run: |
+          cd resources/testproject
+          ../../build/c3c run --debug-log
+
+      - name: Test WASM
+        run: |
+          cd resources/testfragments
+          ../../build/c3c compile --reloc=none --target wasm32 -g0 --link-libc=no --no-entry -Os wasm4.c3
+
+      - name: Build testproject direct linker
+        run: |
+          cd resources/testproject
+          ../../build/c3c run --debug-log --linker=builtin
+
+      - name: Init a library & a project
+        run: |
+          ./build/c3c init-lib mylib
+          ls mylib.c3l
+          ./build/c3c init myproject
+          ls myproject
+
+      - name: run compiler tests
+        run: |
+          cd test
+          python3 src/tester.py ../build/c3c test_suite/

  build-mac:
    runs-on: macos-latest
@@ -446,20 +584,26 @@ jobs:
      fail-fast: false
      matrix:
        build_type: [Release, Debug]
-        llvm_version: [15, 16, 17]
+        llvm_version: [17, 18]
    steps:
      - uses: actions/checkout@v4
      - name: Download LLVM
        run: |
          brew install llvm@${{ matrix.llvm_version }} ninja curl
-          echo "/opt/homebrew/opt/llvm@${{ matrix.llvm_version }}/bin" >> $GITHUB_PATH    
+          echo "/opt/homebrew/opt/llvm@${{ matrix.llvm_version }}/bin" >> $GITHUB_PATH
          TMP_PATH=$(xcrun --show-sdk-path)/user/include
          echo "CPATH=$TMP_PATH" >> $GITHUB_ENV

      - name: CMake
+        if: matrix.llvm_version < 18
        run: |
          cmake -B build -G Ninja -DC3_LLVM_VERSION=${{matrix.llvm_version}} -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
          cmake --build build
+      - name: CMake18
+        if: matrix.llvm_version >= 18
+        run: |
+          cmake -B build -G Ninja -DC3_LLVM_VERSION=${{matrix.llvm_version}}.1 -DCMAKE_BUILD_TYPE=${{ matrix.build_type }}
+          cmake --build build

      - name: Vendor-fetch
        run: |
@@ -475,6 +619,7 @@ jobs:
          ../build/c3c compile-run examples/process.c3
          ../build/c3c compile-run examples/load_world.c3
          ../build/c3c compile-run -O5 examples/load_world.c3
+          ../build/c3c compile-run examples/args.c3 -- foo -bar "baz baz"

      - name: Compile run unit tests
        run: |
@@ -502,7 +647,7 @@ jobs:
          python3 src/tester.py ../build/c3c test_suite/

      - name: bundle_output
-        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION
+        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION_MAC
        run: |
          mkdir macos
          cp -r lib macos
@@ -511,7 +656,7 @@ jobs:
          zip -r c3-macos-${{matrix.build_type}}.zip macos

      - name: upload artifacts
-        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION
+        if: matrix.llvm_version == env.LLVM_RELEASE_VERSION_MAC
        uses: actions/upload-artifact@v3
        with:
          name: c3-macos-${{matrix.build_type}}
--- a/.gitignore
+++ b/.gitignore
@@ -67,3 +67,6 @@ out/

 /cmake-build-debug/
 /cmake-build-release/
+
+# Emacs files
+TAGS
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.20)

 # Grab the version
 file(READ "src/version.h" ver)
@@ -10,6 +10,11 @@ endif()
 project(c3c VERSION ${CMAKE_MATCH_1})
 message("C3C version: ${CMAKE_PROJECT_VERSION}")

+# Avoid warning for FetchContent
+if (CMAKE_VERSION VERSION_GREATER_EQUAL "3.24.0")
+    cmake_policy(SET CMP0135 NEW)
+endif()
+
 if (NOT DEFINED CMAKE_INSTALL_LIBDIR)
    if (MSVC)
        set(CMAKE_INSTALL_LIBDIR "c:\\c3c\\lib")
@@ -32,6 +37,7 @@ set(CMAKE_C_STANDARD 11)
 set(CMAKE_CXX_STANDARD 17)

 if(MSVC)
+    message(STATUS "MSVC version ${MSVC_VERSION}")
    set(CMAKE_CXX_FLAGS_RELEASE "${CMAKE_CXX_FLAGS_RELEASE} /O2 /EHsc")
    set(CMAKE_C_FLAGS_RELEASE "${CMAKE_C_FLAGS_RELEASE} /O2 /EHsc")
    set(CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG} /Od /Zi /EHa")
@@ -75,7 +81,7 @@ if (NOT WIN32)
    find_package(CURL)
 endif()
 if (NOT C3_LLVM_VERSION STREQUAL "auto")
-    if (${C3_LLVM_VERSION} VERSION_LESS 15 OR ${C3_LLVM_VERSION} VERSION_GREATER 19)
+    if (${C3_LLVM_VERSION} VERSION_LESS 17 OR ${C3_LLVM_VERSION} VERSION_GREATER 20)
        message(FATAL_ERROR "LLVM ${C3_LLVM_VERSION} is not supported!")
    endif()
 endif()
@@ -97,25 +103,27 @@ endif()

 if(CMAKE_C_COMPILER_ID STREQUAL "MSVC")
    if (C3_LLVM_VERSION STREQUAL "auto")
-        set(C3_LLVM_VERSION "16")
+        set(C3_LLVM_VERSION "18")
    endif()
    FetchContent_Declare(
            LLVM_Windows
-            URL https://github.com/c3lang/win-llvm/releases/download/llvm_16_0_2/llvm-16.0.2-windows-amd64-msvc17-libcmt.7z
+            URL https://github.com/c3lang/win-llvm/releases/download/llvm_18_1_8_with_rt/llvm-18.1.8-windows-amd64-msvc17-libcmt.7z
    )
    FetchContent_Declare(
            LLVM_Windows_debug
-            URL https://github.com/c3lang/win-llvm/releases/download/llvm_16_0_2/llvm-16.0.2-windows-amd64-msvc17-libcmt-dbg.7z
+            URL https://github.com/c3lang/win-llvm/releases/download/llvm_18_1_8_with_rt/llvm-18.1.8-windows-amd64-msvc17-libcmt-dbg.7z
    )
    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
        message("Loading Windows LLVM debug libraries, this may take a while...")
        FetchContent_MakeAvailable(LLVM_Windows_debug)
-        set(CMAKE_SYSTEM_PREFIX_PATH ${llvm_windows_debug_SOURCE_DIR} ${CMAKE_SYSTEM_PREFIX_PATH})
+        set(llvm_dir ${llvm_windows_debug_SOURCE_DIR})
    else()
        message("Loading Windows LLVM libraries, this may take a while...")
        FetchContent_MakeAvailable(LLVM_Windows)
-        set(CMAKE_SYSTEM_PREFIX_PATH ${llvm_windows_SOURCE_DIR} ${CMAKE_SYSTEM_PREFIX_PATH})
+        set(llvm_dir ${llvm_windows_SOURCE_DIR})
    endif()
+    set(CMAKE_SYSTEM_PREFIX_PATH ${llvm_dir} ${CMAKE_SYSTEM_PREFIX_PATH})
+
    find_package(LLVM REQUIRED CONFIG)
    find_package(LLD REQUIRED CONFIG)
 else()
@@ -130,12 +138,19 @@ message(STATUS "Found LLVM ${LLVM_PACKAGE_VERSION}")
 message(STATUS "Using LLVMConfig.cmake in: ${LLVM_DIR}")
 message(STATUS "Libraries located in: ${LLVM_LIBRARY_DIRS}")

+if (NOT LLVM_PACKAGE_VERSION VERSION_GREATER_EQUAL 15.0)
+    message(FATAL_ERROR "LLVM version 15.0 or later is required.")
+endif()
+
 if(LLVM_ENABLE_RTTI)
    message(STATUS "LLVM was built with RTTI")
 else()
    message(STATUS "LLVM was not built with RTTI")
 endif()

+string(REPLACE "." ";" VERSION_LIST ${LLVM_PACKAGE_VERSION})
+list(GET VERSION_LIST 0 LLVM_MAJOR_VERSION)
+
 include_directories(${LLVM_INCLUDE_DIRS})
 link_directories(${LLVM_LIBRARY_DIRS})
 add_definitions(${LLVM_DEFINITIONS})
@@ -195,33 +210,35 @@ else()
    find_library(LLD_WASM NAMES liblldWasm.so PATHS ${LLVM_LIBRARY_DIRS} NO_DEFAULT_PATH)
 endif()

-file(REMOVE_RECURSE ${CMAKE_BINARY_DIR}/lib)
-file(COPY ${CMAKE_SOURCE_DIR}/lib DESTINATION ${CMAKE_BINARY_DIR})
-
-if (${LLVM_PACKAGE_VERSION} VERSION_GREATER_EQUAL 16)
-    find_library(LLD_LOONG NAMES libLLVMLoongArchCodeGen.lib libLLVMLoongArchAsmParser.lib libLLVMLoongArchCodeGen.a libLLVMLoongArchAsmParser.a PATHS ${LLVM_LIBRARY_DIRS} NO_DEFAULT_PATH)
-    set(lld_libs
-        ${LLD_COFF}
-        ${LLD_COMMON}
-        ${LLD_WASM}
-        ${LLD_MINGW}
-        ${LLD_ELF}
-        ${LLD_MACHO}
-        )
-else()
-    set(lld_libs
-        ${LLD_COFF}
-        ${LLD_COMMON}
-        ${LLD_WASM}
-        ${LLD_MINGW}
-        ${LLD_ELF}
-        ${LLD_MACHO}
-        )
+if (NOT(${CMAKE_BINARY_DIR} EQUAL ${CMAKE_SOURCE_DIR}))
+    file(REMOVE_RECURSE ${CMAKE_BINARY_DIR}/lib)
+    file(COPY ${CMAKE_SOURCE_DIR}/lib DESTINATION ${CMAKE_BINARY_DIR})
 endif()

+find_library(LLD_LOONG NAMES libLLVMLoongArchCodeGen.lib libLLVMLoongArchAsmParser.lib libLLVMLoongArchCodeGen.a libLLVMLoongArchAsmParser.a PATHS ${LLVM_LIBRARY_DIRS} NO_DEFAULT_PATH)
+set(lld_libs
+    ${LLD_COFF}
+    ${LLD_COMMON}
+    ${LLD_WASM}
+    ${LLD_MINGW}
+    ${LLD_ELF}
+    ${LLD_MACHO}
+    )
+
 if (APPLE)
    set(lld_libs ${lld_libs} xar)
-endif ()
+    find_file(RT_ASAN_DYNAMIC NAMES libclang_rt.asan_osx_dynamic.dylib PATHS "${LLVM_LIBRARY_DIRS}/clang/${LLVM_MAJOR_VERSION}/lib/darwin")
+    find_file(RT_TSAN_DYNAMIC NAMES libclang_rt.tsan_osx_dynamic.dylib PATHS "${LLVM_LIBRARY_DIRS}/clang/${LLVM_MAJOR_VERSION}/lib/darwin")
+    find_file(RT_UBSAN_DYNAMIC NAMES libclang_rt.ubsan_osx_dynamic.dylib PATHS "${LLVM_LIBRARY_DIRS}/clang/${LLVM_MAJOR_VERSION}/lib/darwin")
+    find_file(RT_LSAN_DYNAMIC NAMES libclang_rt.lsan_osx_dynamic.dylib PATHS "${LLVM_LIBRARY_DIRS}/clang/${LLVM_MAJOR_VERSION}/lib/darwin")
+    set(sanitizer_runtime_libraries
+            ${RT_ASAN_DYNAMIC}
+            ${RT_TSAN_DYNAMIC}
+            # Unused
+            # ${RT_UBSAN_DYNAMIC}
+            # ${RT_LSAN_DYNAMIC}
+        )
+endif()

 message(STATUS "linking to llvm libs ${lld_libs}")
 message(STATUS "Found lld libs ${lld_libs}")
@@ -234,11 +251,15 @@ add_executable(c3c
        src/build/builder.c
        src/build/build_options.c
        src/build/project_creation.c
+        src/build/project_manipulation.c
+        src/build/libraries.c
        src/compiler/ast.c
        src/compiler/bigint.c
        src/compiler/codegen_general.c
        src/compiler/compiler.c
        src/compiler/compiler.h
+        src/compiler/subprocess.c
+        src/compiler/subprocess.h
        src/compiler/context.c
        src/compiler/copying.c
        src/compiler/diagnostics.c
@@ -246,7 +267,6 @@ add_executable(c3c
        src/compiler/headers.c
        src/compiler/json_output.c
        src/compiler/lexer.c
-        src/compiler/libraries.c
        src/compiler/linker.c
        src/compiler/llvm_codegen.c
        src/compiler/abi/c_abi_aarch64.c
@@ -315,7 +335,8 @@ add_executable(c3c
        src/compiler/expr.c
        src/utils/time.c
        src/utils/http.c
-        src/compiler/sema_liveness.c)
+        src/compiler/sema_liveness.c
+        src/build/common_build.c)


 if (C3_USE_TB)
@@ -356,11 +377,12 @@ endif()


 target_include_directories(c3c PRIVATE
-        "${CMAKE_SOURCE_DIR}/src/")
+        "${CMAKE_SOURCE_DIR}/src/"
+        "${CMAKE_SOURCE_DIR}/wrapper/include/")


 target_include_directories(c3c_wrappers PRIVATE
-        "${CMAKE_SOURCE_DIR}/wrapper/src/")
+        "${CMAKE_SOURCE_DIR}/wrapper/include/")

 target_include_directories(miniz PUBLIC
        "${CMAKE_SOURCE_DIR}/dependencies/miniz/")
@@ -388,6 +410,9 @@ if(MSVC)
    message("Adding MSVC options")
    target_compile_options(c3c PRIVATE /wd4068 /wd4090 /WX /Wv:18)
    target_compile_options(c3c_wrappers PUBLIC /wd4624 /wd4267 /wd4244 /WX /Wv:18)
+    if (NOT LLVM_ENABLE_RTTI)
+        target_compile_options(c3c_wrappers PUBLIC /GR-)
+    endif()
    target_link_options(c3c_wrappers PUBLIC /ignore:4099)
    if(CMAKE_BUILD_TYPE STREQUAL "Debug")
        target_compile_options(c3c PUBLIC /MTd)
@@ -404,16 +429,41 @@ if(MSVC)
            target_compile_options(tilde-backend PUBLIC /MT)
        endif()
    endif()
-
+    set(clang_lib_dir ${llvm_dir}/lib/clang/${C3_LLVM_VERSION}/lib/windows)
+    set(sanitizer_runtime_libraries
+        ${clang_lib_dir}/clang_rt.asan-x86_64.lib
+        ${clang_lib_dir}/clang_rt.asan_dynamic-x86_64.lib
+        ${clang_lib_dir}/clang_rt.asan_dynamic-x86_64.dll
+        ${clang_lib_dir}/clang_rt.asan_dynamic_runtime_thunk-x86_64.lib)
 else()
    message(STATUS "using gcc/clang warning switches")
    target_link_options(c3c PRIVATE -pthread)
+    if (NOT LLVM_ENABLE_RTTI)
+        target_compile_options(c3c_wrappers PRIVATE -fno-rtti)
+    endif()
    target_compile_options(c3c PRIVATE -pthread -Wall -Werror -Wno-unknown-pragmas -Wno-unused-result
            -Wno-unused-function -Wno-unused-variable -Wno-unused-parameter)
 endif()

-
 install(TARGETS c3c DESTINATION bin)
 install(DIRECTORY lib/ DESTINATION lib/c3)

+if (DEFINED sanitizer_runtime_libraries)
+    add_custom_command(TARGET c3c POST_BUILD
+        COMMAND "${CMAKE_COMMAND}" -E rm -rf -- $<TARGET_FILE_DIR:c3c>/c3c_rt
+        COMMAND "${CMAKE_COMMAND}" -E make_directory $<TARGET_FILE_DIR:c3c>/c3c_rt
+        COMMAND "${CMAKE_COMMAND}" -E copy ${sanitizer_runtime_libraries} $<TARGET_FILE_DIR:c3c>/c3c_rt
+        VERBATIM
+        COMMENT "Copying sanitizer runtime libraries to output directory")
+
+    if (APPLE)
+        # Change LC_ID_DYLIB to be rpath-based instead of having an absolute path
+        add_custom_command(TARGET c3c POST_BUILD
+            COMMAND find $<TARGET_FILE_DIR:c3c>/c3c_rt -type f -name "*.dylib" -execdir ${LLVM_TOOLS_BINARY_DIR}/llvm-install-name-tool -id @rpath/{} {} $<SEMICOLON>
+            VERBATIM)
+    endif()
+
+    install(DIRECTORY $<TARGET_FILE_DIR:c3c>/c3c_rt/ DESTINATION bin/c3c_rt)
+endif()
+
 feature_summary(WHAT ALL)
--- a/README.md
+++ b/README.md
@@ -137,9 +137,9 @@ fn void main()

 ### Current status

-The current stable version of the compiler is **version 0.5**.
+The current stable version of the compiler is **version 0.6.1**.

-The upcoming 0.6 release will focus on expanding the standard library.
+The upcoming 0.6.x releases will focus on expanding the standard library.
 Follow the issues [here](https://github.com/c3lang/c3c/issues).

 If you have suggestions on how to improve the language, either [file an issue](https://github.com/c3lang/c3c/issues) 
@@ -212,7 +212,7 @@ More platforms will be supported in the future.
 3. Unzip executable and standard lib.
 4. Run `./c3c`.

-(*Note that there is a known issue with debug symbol generation on MacOS 13, see issue #1086)
+(*Note that there is a known issue with debug symbol generation on MacOS 13, see [issue #1086](https://github.com/c3lang/c3c/issues/1086))

 #### Installing on Arch Linux
 There is an AUR package for the c3c compiler : [c3c-git](https://aur.archlinux.org/packages/c3c-git).
@@ -253,7 +253,7 @@ A `c3c` executable will be found under `bin/`.
 #### Installing on OS X using Homebrew

 2. Install CMake: `brew install cmake`
-3. Install LLVM 15: `brew install llvm`
+3. Install LLVM 17+: `brew install llvm`
 4. Clone the C3C github repository: `git clone https://github.com/c3lang/c3c.git`
 5. Enter the C3C directory `cd c3c`.
 6. Create a build directory `mkdir build`
@@ -308,7 +308,7 @@ You can try it out by running some sample code: `c3c.exe compile ../resources/ex

 1. Make sure you have a C compiler that handles C11 and a C++ compiler, such as GCC or Clang. Git also needs to be installed.
 2. Install CMake: `sudo apt install cmake`
-3. Install LLVM 15 (or greater: C3C supports LLVM 15-17): `sudo apt-get install clang-15 zlib1g zlib1g-dev libllvm15 llvm-15 llvm-15-dev llvm-15-runtime liblld-15-dev liblld-15`
+3. Install LLVM 17+ (or greater: C3C supports LLVM 17+): `sudo apt-get install clang-17 zlib1g zlib1g-dev libllvm17 llvm-17 llvm-17-dev llvm-17-runtime liblld-17-dev liblld-17`
 4. Clone the C3C github repository: `git clone https://github.com/c3lang/c3c.git`
 5. Enter the C3C directory `cd c3c`.
 6. Create a build directory `mkdir build`
@@ -323,7 +323,7 @@ You can try it out by running some sample code: `./c3c compile ../resources/exam

 #### Compiling on Void Linux

-1. As root, ensure that all project dependencies are installed: `xbps-install git cmake llvm15 lld-devel libcurl-devel ncurses-devel zlib-devel libzstd-devel libxml2-devel`
+1. As root, ensure that all project dependencies are installed: `xbps-install git cmake llvm17 lld17-devel libcurl-devel ncurses-devel zlib-devel libzstd-devel libxml2-devel`
 2. Clone the C3C repository: `git clone https://github.com/c3lang/c3c.git`
    - If you only need the latest commit, you may want to make a shallow clone instead: `git clone https://github.com/c3lang/c3c.git --depth=1`
 3. Enter the directory: `cd c3c`
@@ -339,7 +339,7 @@ For a sytem-wide installation, run the following as root: `cmake --install .`
 #### Compiling on other Linux / Unix variants

 1. Install CMake.
-2. Install or compile LLVM and LLD *libraries* (version 15+ or higher)
+2. Install or compile LLVM and LLD *libraries* (version 17+ or higher)
 3. Clone the C3C github repository: `git clone https://github.com/c3lang/c3c.git`
 4. Enter the C3C directory `cd c3c`.
 5. Create a build directory `mkdir build`
--- a/build-with-docker.sh
+++ b/build-with-docker.sh
@@ -1,43 +1,44 @@
 #!/bin/bash
-## build-with-docker.sh
-## @author gdm85
-## @modified by Kenta
-##
-## Script to build c3c for Ubuntu 22
-##
-#

-read -p "Select Build Type: Debug/Release: " config
+: ${DOCKER:=docker}
+: ${IMAGE:="c3c-builder"}
+: ${CMAKE_BUILD_TYPE:=Release}
+: ${LLVM_VERSION:=18}
+: ${UBUNTU_VERSION:="22.04"}
+: ${CMAKE_VERSION:="3.20.0"}

-set -e
+cd docker || exit 1  # Exit if the 'docker' directory doesn't exist

-DOCKER=docker
-DOCKER_RUN=""
-IMAGE="c3c-builder"
-if type podman 2>/dev/null >/dev/null; then
-    DOCKER=podman
-    DOCKER_RUN="--userns=keep-id"
-    IMAGE="localhost/$IMAGE"
+$DOCKER build \
+    --build-arg LLVM_VERSION=$LLVM_VERSION \
+    --build-arg CMAKE_VERSION=$CMAKE_VERSION \
+    --build-arg UBUNTU_VERSION=$UBUNTU_VERSION \
+    -t $IMAGE .
+
+if [ $? -ne 0 ]; then
+    echo "Docker image build failed. Exiting."
+    exit 1
 fi

-if [ $config == "Debug" ]; then
-    CMAKE_BUILD_TYPE=Debug
-else
-    CMAKE_BUILD_TYPE="$config"
-fi
-
-UBUNTU_VERSION="22.10"
-LLVM_VERSION="15"
-
-IMAGE="$IMAGE:22"
-
-cd docker && $DOCKER build -t $IMAGE\
-    --build-arg DEPS="llvm-$LLVM_VERSION-dev liblld-$LLVM_VERSION-dev clang-$LLVM_VERSION libllvm$LLVM_VERSION llvm-$LLVM_VERSION-runtime" \
-    --build-arg UBUNTU_VERSION="$UBUNTU_VERSION" .
 cd ..

 rm -rf build bin
 mkdir -p build bin

-exec $DOCKER run -ti --rm --tmpfs=/tmp $DOCKER_RUN -v "$PWD":/home/c3c/source -w /home/c3c/source $IMAGE bash -c \
-    "cd build && cmake -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE -DC3_LLVM_VERSION=$LLVM_VERSION .. && cmake --build . && mv c3c lib ../bin/"
+chmod -R 777 build bin
+
+exec $DOCKER run -i --rm \
+    -v "$PWD":/home/c3c/source \
+    -w /home/c3c/source $IMAGE bash -c \
+    "cmake -S . -B build \
+            -G Ninja \
+            -DCMAKE_BUILD_TYPE=$CMAKE_BUILD_TYPE \
+            -DCMAKE_C_COMPILER=clang-$LLVM_VERSION \
+            -DCMAKE_CXX_COMPILER=clang++-$LLVM_VERSION \
+            -DCMAKE_LINKER=lld-$LLVM_VERSION \
+            -DCMAKE_OBJCOPY=llvm-objcopy-$LLVM_VERSION \
+            -DCMAKE_STRIP=llvm-strip-$LLVM_VERSION \
+            -DCMAKE_DLLTOOL=llvm-dlltool-$LLVM_VERSION \
+            -DC3_LLVM_VERSION=auto && \
+    cmake --build build && \
+    cp -r build/c3c build/lib bin"
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,16 +1,49 @@
+ARG UBUNTU_VERSION=22.04
+FROM ubuntu:${UBUNTU_VERSION}

-ARG UBUNTU_VERSION
-FROM ubuntu:$UBUNTU_VERSION
+ARG LLVM_VERSION=18
+ENV LLVM_DEV_VERSION=20

-ARG DEPS
+ARG CMAKE_VERSION=3.20

-RUN export DEBIAN_FRONTEND=noninteractive && export TERM=xterm && apt-get update && apt-get install -y build-essential cmake zlib1g zlib1g-dev  \
-        $DEPS && \
-	rm -rf /var/lib/apt/lists/*
+RUN apt-get update && apt-get install -y wget gnupg software-properties-common zlib1g zlib1g-dev python3 ninja-build curl g++ && \
+    wget https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-$CMAKE_VERSION-linux-x86_64.sh && \
+    mkdir -p /opt/cmake && \
+    sh cmake-${CMAKE_VERSION}-linux-x86_64.sh --prefix=/opt/cmake --skip-license && \
+    rm cmake-${CMAKE_VERSION}-linux-x86_64.sh && \
+    ln -s /opt/cmake/bin/cmake /usr/local/bin/cmake

-ARG GID=1000
-ARG UID=1000
+RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add - && \
+    if [ "${LLVM_VERSION}" -lt 18 ]; then \
+        add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${LLVM_VERSION} main" && \
+        apt-get update && \
+        apt-get install -y -t llvm-toolchain-focal-${LLVM_VERSION} \
+          libpolly-${LLVM_VERSION}-dev \
+          clang-${LLVM_VERSION} llvm-${LLVM_VERSION} llvm-${LLVM_VERSION}-dev \
+          lld-${LLVM_VERSION} liblld-${LLVM_VERSION}-dev libmlir-${LLVM_VERSION} \
+          libmlir-${LLVM_VERSION}-dev mlir-${LLVM_VERSION}-tools; \
+    elif [ "${LLVM_VERSION}" -lt "${LLVM_DEV_VERSION}" ]; then \
+        add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-${LLVM_VERSION} main" && \
+        apt-get update && \
+        apt-get install -y -t llvm-toolchain-focal-${LLVM_VERSION} \
+          libpolly-${LLVM_VERSION}-dev \
+          clang-${LLVM_VERSION} clang++-${LLVM_VERSION} llvm-${LLVM_VERSION} llvm-${LLVM_VERSION}-dev \
+          lld-${LLVM_VERSION} liblld-${LLVM_VERSION}-dev; \
+    else \
+        add-apt-repository "deb http://apt.llvm.org/focal/ llvm-toolchain-focal main" && \
+        apt-get update && \
+        apt-get install -y -t llvm-toolchain-focal \
+          libpolly-${LLVM_VERSION}-dev \
+          clang-${LLVM_VERSION} llvm-${LLVM_VERSION} llvm-${LLVM_VERSION}-dev \
+          lld-${LLVM_VERSION} liblld-${LLVM_VERSION}-dev; \
+    fi && \
+    rm -rf /var/lib/apt/lists/*

-RUN groupadd -o --gid=$GID c3c && useradd --gid=$GID --uid=$GID --create-home --shell /bin/bash c3c
+RUN groupadd -g 1337 c3c && \
+    useradd -m -u 1337 -g c3c c3c

+# Add cmake to PATH for user c3c
 USER c3c
+ENV PATH="/opt/cmake/bin:${PATH}"
+
+WORKDIR /home/c3c
--- a/lib/std/collections/elastic_array.c3
+++ b/lib/std/collections/elastic_array.c3
@@ -0,0 +1,434 @@
+// Copyright (c) 2021-2024 Christoffer Lerno. All rights reserved.
+// Use of self source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
+/**
+ * @require MAX_SIZE >= 1 `The size must be at least 1 element big.`
+ **/
+module std::collections::elastic_array(<Type, MAX_SIZE>);
+import std::io, std::math, std::collections::list_common;
+
+def ElementPredicate = fn bool(Type *type);
+def ElementTest = fn bool(Type *type, any context);
+const ELEMENT_IS_EQUATABLE = types::is_equatable_type(Type);
+const ELEMENT_IS_POINTER = Type.kindof == POINTER;
+macro type_is_overaligned() => Type.alignof > mem::DEFAULT_MEM_ALIGNMENT;
+
+struct ElasticArray (Printable)
+{
+	usz size;
+	Type[MAX_SIZE] entries;
+}
+
+fn usz! ElasticArray.to_format(&self, Formatter* formatter) @dynamic
+{
+	switch (self.size)
+	{
+		case 0:
+			return formatter.print("[]")!;
+		case 1:
+			return formatter.printf("[%s]", self.entries[0])!;
+		default:
+			usz n = formatter.print("[")!;
+			foreach (i, element : self.entries[:self.size])
+			{
+				if (i != 0) formatter.print(", ")!;
+				n += formatter.printf("%s", element)!;
+			}
+			n += formatter.print("]")!;
+			return n;
+	}
+}
+
+fn String ElasticArray.to_string(&self, Allocator allocator) @dynamic
+{
+	return string::new_format("%s", *self, .allocator = allocator);
+}
+
+fn String ElasticArray.to_tstring(&self)
+{
+	return string::tformat("%s", *self);
+}
+
+fn void! ElasticArray.push_try(&self, Type element) @inline
+{
+	if (self.size == MAX_SIZE) return AllocationFailure.OUT_OF_MEMORY?;
+	self.entries[self.size++] = element;
+}
+
+/**
+ * @require self.size < MAX_SIZE `Tried to exceed the max size`
+ **/
+fn void ElasticArray.push(&self, Type element) @inline
+{
+	self.entries[self.size++] = element;
+}
+
+fn Type! ElasticArray.pop(&self)
+{
+	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
+	return self.entries[--self.size];
+}
+
+fn void ElasticArray.clear(&self)
+{
+	self.size = 0;
+}
+
+/**
+ * @require self.size > 0
+ **/
+fn Type! ElasticArray.pop_first(&self)
+{
+	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
+	defer self.remove_at(0);
+	return self.entries[0];
+}
+
+/**
+ * @require index < self.size
+ **/
+fn void ElasticArray.remove_at(&self, usz index)
+{
+	if (!--self.size || index == self.size) return;
+	self.entries[index .. self.size - 1] = self.entries[index + 1 .. self.size];
+}
+
+/**
+ * @require other_list.size + self.size <= MAX_SIZE
+ **/
+fn void ElasticArray.add_all(&self, ElasticArray* other_list)
+{
+	if (!other_list.size) return;
+	foreach (&value : other_list)
+	{
+		self.entries[self.size++] = *value;
+	}
+}
+
+/**
+ * Add as many elements as possible to the new array,
+ * returning the number of elements that didn't fit.
+ **/
+fn usz ElasticArray.add_all_to_limit(&self, ElasticArray* other_list)
+{
+	if (!other_list.size) return 0;
+	foreach (i, &value : other_list)
+	{
+		if (self.size == MAX_SIZE) return other_list.size - i;
+		self.entries[self.size++] = *value;
+	}
+	return 0;
+}
+
+/**
+ * Add as many values from this array as possible, returning the
+ * number of elements that didn't fit.
+ *
+ * @param [in] array
+ **/
+fn usz ElasticArray.add_array_to_limit(&self, Type[] array)
+{
+	if (!array.len) return 0;
+	foreach (i, &value : array)
+	{
+		if (self.size == MAX_SIZE) return array.len - i;
+		self.entries[self.size++] = *value;
+	}
+	return 0;
+}
+
+/**
+ * Add the values of an array to this list.
+ *
+ * @param [in] array
+ * @require array.len + self.size <= MAX_SIZE `Size would exceed max.`
+ * @ensure self.size >= array.len
+ **/
+fn void ElasticArray.add_array(&self, Type[] array)
+{
+	if (!array.len) return;
+	foreach (&value : array)
+	{
+		self.entries[self.size++] = *value;
+	}
+}
+
+
+
+/**
+ * IMPORTANT The returned array must be freed using free_aligned.
+ **/
+fn Type[] ElasticArray.to_new_aligned_array(&self, Allocator allocator = allocator::heap())
+{
+	return list_common::list_to_new_aligned_array(Type, self, allocator);
+}
+
+/**
+ * @require !type_is_overaligned() : "This function is not available on overaligned types"
+ **/
+macro Type[] ElasticArray.to_new_array(&self, Allocator allocator = allocator::heap())
+{
+	return list_common::list_to_new_array(Type, self, allocator);
+}
+
+fn Type[] ElasticArray.to_tarray(&self)
+{
+	$if type_is_overaligned():
+	return self.to_new_aligned_array(allocator::temp());
+	$else
+	return self.to_new_array(allocator::temp());
+	$endif;
+}
+
+/**
+ * Reverse the elements in a list.
+ **/
+fn void ElasticArray.reverse(&self)
+{
+	list_common::list_reverse(self);
+}
+
+fn Type[] ElasticArray.array_view(&self)
+{
+	return self.entries[:self.size];
+}
+
+/**
+ * @require self.size < MAX_SIZE `List would exceed max size`
+ **/
+fn void ElasticArray.push_front(&self, Type type) @inline
+{
+	self.insert_at(0, type);
+}
+
+/**
+ * @require self.size < MAX_SIZE `List would exceed max size`
+ **/
+fn void! ElasticArray.push_front_try(&self, Type type) @inline
+{
+	return self.insert_at_try(0, type);
+}
+
+/**
+ * @require index <= self.size
+ **/
+fn void! ElasticArray.insert_at_try(&self, usz index, Type value)
+{
+	if (self.size == MAX_SIZE) return AllocationFailure.OUT_OF_MEMORY?;
+	self.insert_at(index, value);
+}
+
+/**
+ * @require self.size < MAX_SIZE `List would exceed max size`
+ * @require index <= self.size
+ **/
+fn void ElasticArray.insert_at(&self, usz index, Type type)
+{
+	for (usz i = self.size; i > index; i--)
+	{
+		self.entries[i] = self.entries[i - 1];
+	}
+	self.size++;
+	self.entries[index] = type;
+}
+
+/**
+ * @require index < self.size
+ **/
+fn void ElasticArray.set_at(&self, usz index, Type type)
+{
+	self.entries[index] = type;
+}
+
+fn void! ElasticArray.remove_last(&self) @maydiscard
+{
+	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
+	self.size--;
+}
+
+fn void! ElasticArray.remove_first(&self) @maydiscard
+{
+	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
+	self.remove_at(0);
+}
+
+fn Type! ElasticArray.first(&self)
+{
+	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
+	return self.entries[0];
+}
+
+fn Type! ElasticArray.last(&self)
+{
+	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
+	return self.entries[self.size - 1];
+}
+
+fn bool ElasticArray.is_empty(&self) @inline
+{
+	return !self.size;
+}
+
+fn usz ElasticArray.byte_size(&self) @inline
+{
+	return Type.sizeof * self.size;
+}
+
+fn usz ElasticArray.len(&self) @operator(len) @inline
+{
+	return self.size;
+}
+
+fn Type ElasticArray.get(&self, usz index) @inline
+{
+	return self.entries[index];
+}
+
+fn void ElasticArray.swap(&self, usz i, usz j)
+{
+	@swap(self.entries[i], self.entries[j]);
+}
+
+/**
+ * @param filter "The function to determine if it should be removed or not"
+ * @return "the number of deleted elements"
+ **/
+fn usz ElasticArray.remove_if(&self, ElementPredicate filter)
+{
+	return list_common::list_remove_if(self, filter, false);
+}
+
+/**
+ * @param selection "The function to determine if it should be kept or not"
+ * @return "the number of deleted elements"
+ **/
+fn usz ElasticArray.retain_if(&self, ElementPredicate selection)
+{
+	return list_common::list_remove_if(self, selection, true);
+}
+
+fn usz ElasticArray.remove_using_test(&self, ElementTest filter, any context)
+{
+	return list_common::list_remove_using_test(self, filter, false, context);
+}
+
+fn usz ElasticArray.retain_using_test(&self, ElementTest filter, any context)
+{
+	return list_common::list_remove_using_test(self, filter, true, context);
+}
+
+
+macro Type ElasticArray.@item_at(&self, usz index) @operator([])
+{
+	return self.entries[index];
+}
+
+fn Type* ElasticArray.get_ref(&self, usz index) @operator(&[]) @inline
+{
+	return &self.entries[index];
+}
+
+fn void ElasticArray.set(&self, usz index, Type value) @operator([]=)
+{
+	self.entries[index] = value;
+}
+
+
+// Functions for equatable types
+fn usz! ElasticArray.index_of(&self, Type type) @if(ELEMENT_IS_EQUATABLE)
+{
+	foreach (i, v : self)
+	{
+		if (equals(v, type)) return i;
+	}
+	return SearchResult.MISSING?;
+}
+
+fn usz! ElasticArray.rindex_of(&self, Type type) @if(ELEMENT_IS_EQUATABLE)
+{
+	foreach_r (i, v : self)
+	{
+		if (equals(v, type)) return i;
+	}
+	return SearchResult.MISSING?;
+}
+
+fn bool ElasticArray.equals(&self, ElasticArray other_list) @if(ELEMENT_IS_EQUATABLE)
+{
+	if (self.size != other_list.size) return false;
+	foreach (i, v : self)
+	{
+		if (!equals(v, other_list.entries[i])) return false;
+	}
+	return true;
+}
+
+/**
+ * Check for presence of a value in a list.
+ *
+ * @param [&in] self "the list to find elements in"
+ * @param value "The value to search for"
+ * @return "True if the value is found, false otherwise"
+ **/
+fn bool ElasticArray.contains(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+{
+	foreach (i, v : self)
+	{
+		if (equals(v, value)) return true;
+	}
+	return false;
+}
+
+/**
+ * @param [&inout] self "The list to remove elements from"
+ * @param value "The value to remove"
+ * @return "true if the value was found"
+ **/
+fn bool ElasticArray.remove_last_item(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+{
+	return @ok(self.remove_at(self.rindex_of(value)));
+}
+
+/**
+ * @param [&inout] self "The list to remove elements from"
+ * @param value "The value to remove"
+ * @return "true if the value was found"
+ **/
+fn bool ElasticArray.remove_first_item(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+{
+	return @ok(self.remove_at(self.index_of(value)));
+}
+
+/**
+ * @param [&inout] self "The list to remove elements from"
+ * @param value "The value to remove"
+ * @return "the number of deleted elements."
+ **/
+fn usz ElasticArray.remove_item(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+{
+	return list_common::list_remove_item(self, value);
+}
+
+
+
+fn void ElasticArray.remove_all_from(&self, ElasticArray* other_list) @if(ELEMENT_IS_EQUATABLE)
+{
+	if (!other_list.size) return;
+	foreach (v : other_list) self.remove_item(v);
+}
+
+/**
+ * @param [&in] self
+ * @return "The number non-null values in the list"
+ **/
+fn usz ElasticArray.compact_count(&self) @if(ELEMENT_IS_POINTER)
+{
+	usz vals = 0;
+	foreach (v : self) if (v) vals++;
+	return vals;
+}
+
+fn usz ElasticArray.compact(&self) @if(ELEMENT_IS_POINTER)
+{
+	return list_common::list_compact(self);
+}
--- a/lib/std/collections/hashmap.c3
+++ b/lib/std/collections/hashmap.c3
@@ -0,0 +1,400 @@
+// Copyright (c) 2023 Christoffer Lerno. All rights reserved.
+// Use of this source code is governed by the MIT license
+// a copy of which can be found in the LICENSE_STDLIB file.
+module std::collections::map(<Key, Value>);
+import std::math;
+
+struct HashMap
+{
+	Entry*[] table;
+	Allocator allocator;
+	uint count; // Number of elements
+	uint threshold; // Resize limit
+	float load_factor;
+}
+
+/**
+ * @param [&inout] allocator "The allocator to use"
+ * @require capacity > 0 "The capacity must be 1 or higher"
+ * @require load_factor > 0.0 "The load factor must be higher than 0"
+ * @require !self.allocator "Map was already initialized"
+ * @require capacity < MAXIMUM_CAPACITY "Capacity cannot exceed maximum"
+ **/
+fn HashMap* HashMap.new_init(&self, uint capacity = DEFAULT_INITIAL_CAPACITY, float load_factor = DEFAULT_LOAD_FACTOR, Allocator allocator = allocator::heap())
+{
+	capacity = math::next_power_of_2(capacity);
+	self.allocator = allocator;
+	self.load_factor = load_factor;
+	self.threshold = (uint)(capacity * load_factor);
+	self.table = allocator::new_array(allocator, Entry*, capacity);
+	return self;
+}
+
+/**
+ * @require capacity > 0 "The capacity must be 1 or higher"
+ * @require load_factor > 0.0 "The load factor must be higher than 0"
+ * @require !self.allocator "Map was already initialized"
+ * @require capacity < MAXIMUM_CAPACITY "Capacity cannot exceed maximum"
+ **/
+fn HashMap* HashMap.temp_init(&self, uint capacity = DEFAULT_INITIAL_CAPACITY, float load_factor = DEFAULT_LOAD_FACTOR)
+{
+	return self.new_init(capacity, load_factor, allocator::temp()) @inline;
+}
+
+
+/**
+ * Has this hash map been initialized yet?
+ *
+ * @param [&in] map "The hash map we are testing"
+ * @return "Returns true if it has been initialized, false otherwise"
+ **/
+fn bool HashMap.is_initialized(&map)
+{
+	return (bool)map.allocator;
+}
+
+/**
+ * @param [&inout] allocator "The allocator to use"
+ * @param [&in] other_map "The map to copy from."
+ **/
+fn HashMap* HashMap.new_init_from_map(&self, HashMap* other_map, Allocator allocator = allocator::heap())
+{
+	self.new_init(other_map.table.len, other_map.load_factor, allocator);
+	self.put_all_for_create(other_map);
+	return self;
+}
+
+/**
+ * @param [&in] other_map "The map to copy from."
+ **/
+fn HashMap* HashMap.temp_init_from_map(&map, HashMap* other_map)
+{
+	return map.new_init_from_map(other_map, allocator::temp()) @inline;
+}
+
+fn bool HashMap.is_empty(&map) @inline
+{
+	return !map.count;
+}
+
+fn usz HashMap.len(&map) @inline
+{
+	return map.count;
+}
+
+fn Value*! HashMap.get_ref(&map, Key key)
+{
+	if (!map.count) return SearchResult.MISSING?;
+	uint hash = rehash(key.hash());
+	for (Entry *e = map.table[index_for(hash, map.table.len)]; e != null; e = e.next)
+	{
+		if (e.hash == hash && equals(key, e.key)) return &e.value;
+	}
+	return SearchResult.MISSING?;
+}
+
+fn Entry*! HashMap.get_entry(&map, Key key)
+{
+	if (!map.count) return SearchResult.MISSING?;
+	uint hash = rehash(key.hash());
+	for (Entry *e = map.table[index_for(hash, map.table.len)]; e != null; e = e.next)
+	{
+		if (e.hash == hash && equals(key, e.key)) return e;
+	}
+	return SearchResult.MISSING?;
+}
+
+/**
+ * Get the value or update and
+ * @require $assignable(#expr, Value)
+ **/
+macro Value HashMap.@get_or_set(&map, Key key, Value #expr)
+{
+	if (!map.count)
+	{
+		Value val = #expr;
+		map.set(key, val);
+		return val;
+	}
+	uint hash = rehash(key.hash());
+	uint index = index_for(hash, map.table.len);
+	for (Entry *e = map.table[index]; e != null; e = e.next)
+	{
+		if (e.hash == hash && equals(key, e.key)) return e.value;
+	}
+	Value val = #expr;
+	map.add_entry(hash, key, val, index);
+	return val;
+}
+
+fn Value! HashMap.get(&map, Key key) @operator([])
+{
+	return *map.get_ref(key) @inline;
+}
+
+fn bool HashMap.has_key(&map, Key key)
+{
+	return @ok(map.get_ref(key));
+}
+
+fn bool HashMap.set(&map, Key key, Value value) @operator([]=)
+{
+	// If the map isn't initialized, use the defaults to initialize it.
+	if (!map.allocator)
+	{
+		map.new_init();
+	}
+	uint hash = rehash(key.hash());
+	uint index = index_for(hash, map.table.len);
+	for (Entry *e = map.table[index]; e != null; e = e.next)
+	{
+		if (e.hash == hash && equals(key, e.key))
+		{
+			e.value = value;
+			return true;
+		}
+	}
+	map.add_entry(hash, key, value, index);
+	return false;
+}
+
+fn void! HashMap.remove(&map, Key key) @maydiscard
+{
+	if (!map.remove_entry_for_key(key)) return SearchResult.MISSING?;
+}
+
+fn void HashMap.clear(&map)
+{
+	if (!map.count) return;
+	foreach (Entry** &entry_ref : map.table)
+	{
+		Entry* entry = *entry_ref;
+		if (!entry) continue;
+		Entry *next = entry.next;
+		while (next)
+		{
+			Entry *to_delete = next;
+			next = next.next;
+			map.free_entry(to_delete);
+		}
+		map.free_entry(entry);
+		*entry_ref = null;
+	}
+	map.count = 0;
+}
+
+fn void HashMap.free(&map)
+{
+	if (!map.allocator) return;
+	map.clear();
+	map.free_internal(map.table.ptr);
+	map.table = {};
+}
+
+fn Key[] HashMap.key_tlist(&map)
+{
+	return map.key_new_list(allocator::temp()) @inline;
+}
+
+fn Key[] HashMap.key_new_list(&map, Allocator allocator = allocator::heap())
+{
+	if (!map.count) return {};
+
+	Key[] list = allocator::alloc_array(allocator, Key, map.count);
+	usz index = 0;
+	foreach (Entry* entry : map.table)
+	{
+		while (entry)
+		{
+			list[index++] = entry.key;
+			entry = entry.next;
+		}
+	}
+	return list;
+}
+
+macro HashMap.@each(map; @body(key, value))
+{
+	map.@each_entry(; Entry* entry) {
+		@body(entry.key, entry.value);
+	};
+}
+
+macro HashMap.@each_entry(map; @body(entry))
+{
+	if (map.count)
+	{
+		foreach (Entry* entry : map.table)
+		{
+			while (entry)
+			{
+				@body(entry);
+				entry = entry.next;
+			}
+		}
+	}
+}
+
+fn Value[] HashMap.value_tlist(&map)
+{
+	return map.value_new_list(allocator::temp()) @inline;
+}
+
+fn Value[] HashMap.value_new_list(&map, Allocator allocator = allocator::heap())
+{
+	if (!map.count) return {};
+	Value[] list = allocator::alloc_array(allocator, Value, map.count);
+	usz index = 0;
+	foreach (Entry* entry : map.table)
+	{
+		while (entry)
+		{
+			list[index++] = entry.value;
+			entry = entry.next;
+		}
+	}
+	return list;
+}
+
+fn bool HashMap.has_value(&map, Value v) @if(VALUE_IS_EQUATABLE)
+{
+	if (!map.count) return false;
+	foreach (Entry* entry : map.table)
+	{
+		while (entry)
+		{
+			if (equals(v, entry.value)) return true;
+			entry = entry.next;
+		}
+	}
+	return false;
+}
+
+// --- private methods
+
+fn void HashMap.add_entry(&map, uint hash, Key key, Value value, uint bucket_index) @private
+{
+	$if COPY_KEYS:
+	key = key.copy(map.allocator);
+	$endif
+	Entry* entry = allocator::new(map.allocator, Entry, { .hash = hash, .key = key, .value = value, .next = map.table[bucket_index] });
+	map.table[bucket_index] = entry;
+	if (map.count++ >= map.threshold)
+	{
+		map.resize(map.table.len * 2);
+	}
+}
+
+fn void HashMap.resize(&map, uint new_capacity) @private
+{
+	Entry*[] old_table = map.table;
+	uint old_capacity = old_table.len;
+	if (old_capacity == MAXIMUM_CAPACITY)
+	{
+		map.threshold = uint.max;
+		return;
+	}
+	Entry*[] new_table = allocator::new_array(map.allocator, Entry*, new_capacity);
+	map.transfer(new_table);
+	map.table = new_table;
+	map.free_internal(old_table.ptr);
+	map.threshold = (uint)(new_capacity * map.load_factor);
+}
+
+fn void HashMap.transfer(&map, Entry*[] new_table) @private
+{
+	Entry*[] src = map.table;
+	uint new_capacity = new_table.len;
+	foreach (uint j, Entry *e : src)
+	{
+		if (!e) continue;
+		do
+		{
+			Entry* next = e.next;
+			uint i = index_for(e.hash, new_capacity);
+			e.next = new_table[i];
+			new_table[i] = e;
+			e = next;
+		}
+		while (e);
+	}
+}
+
+fn void HashMap.put_all_for_create(&map, HashMap* other_map) @private
+{
+	if (!other_map.count) return;
+	foreach (Entry *e : other_map.table)
+	{
+		if (!e) continue;
+		map.put_for_create(e.key, e.value);
+	}
+}
+
+fn void HashMap.put_for_create(&map, Key key, Value value) @private
+{
+	uint hash = rehash(key.hash());
+	uint i = index_for(hash, map.table.len);
+	for (Entry *e = map.table[i]; e != null; e = e.next)
+	{
+		if (e.hash == hash && equals(key, e.key))
+		{
+			e.value = value;
+			return;
+		}
+	}
+	map.create_entry(hash, key, value, i);
+}
+
+fn void HashMap.free_internal(&map, void* ptr) @inline @private
+{
+	allocator::free(map.allocator, ptr);
+}
+
+fn bool HashMap.remove_entry_for_key(&map, Key key) @private
+{
+	uint hash = rehash(key.hash());
+	uint i = index_for(hash, map.table.len);
+	Entry* prev = map.table[i];
+	Entry* e = prev;
+	while (e)
+	{
+		Entry *next = e.next;
+		if (e.hash == hash && equals(key, e.key))
+		{
+			map.count--;
+			if (prev == e)
+			{
+				map.table[i] = next;
+			}
+			else
+			{
+				prev.next = next;
+			}
+			map.free_entry(e);
+			return true;
+		}
+		prev = e;
+		e = next;
+	}
+	return false;
+}
+
+fn void HashMap.create_entry(&map, uint hash, Key key, Value value, int bucket_index) @private
+{
+	Entry *e = map.table[bucket_index];
+	$if COPY_KEYS:
+	key = key.copy(map.allocator);
+	$endif
+	Entry* entry = allocator::new(map.allocator, Entry, { .hash = hash, .key = key, .value = value, .next = map.table[bucket_index] });
+	map.table[bucket_index] = entry;
+	map.count++;
+}
+
+fn void HashMap.free_entry(&self, Entry *entry) @local
+{
+	$if COPY_KEYS:
+	allocator::free(self.allocator, entry.key);
+	$endif
+	self.free_internal(entry);
+}
+
--- a/lib/std/collections/list.c3
+++ b/lib/std/collections/list.c3
@@ -2,13 +2,15 @@
 // Use of self source code is governed by the MIT license
 // a copy of which can be found in the LICENSE_STDLIB file.
 module std::collections::list(<Type>);
-import std::io,std::math;
+import std::io, std::math, std::collections::list_common;

 def ElementPredicate = fn bool(Type *type);
 def ElementTest = fn bool(Type *type, any context);
 const ELEMENT_IS_EQUATABLE = types::is_equatable_type(Type);
 const ELEMENT_IS_POINTER = Type.kindof == POINTER;

+macro type_is_overaligned() => Type.alignof > mem::DEFAULT_MEM_ALIGNMENT;
+
 struct List (Printable)
 {
 	usz size;
@@ -17,7 +19,6 @@ struct List (Printable)
 	Type *entries;
 }

-
 /**
 * @param initial_capacity "The initial capacity to reserve"
 * @param [&inout] allocator "The allocator to use, defaults to the heap allocator"
@@ -26,16 +27,9 @@ fn List* List.new_init(&self, usz initial_capacity = 16, Allocator allocator = a
 {
 	self.allocator = allocator;
 	self.size = 0;
-	if (initial_capacity > 0)
-	{
-		initial_capacity = math::next_power_of_2(initial_capacity);
-		self.entries = allocator::malloc_aligned(allocator, Type.sizeof * initial_capacity, .alignment = Type[1].alignof)!!;
-	}
-	else
-	{
-		self.entries = null;
-	}
-	self.capacity = initial_capacity;
+	self.capacity = 0;
+	self.entries = null;
+	self.reserve(initial_capacity);
 	return self;
 }

@@ -50,14 +44,40 @@ fn List* List.temp_init(&self, usz initial_capacity = 16)
 }

 /**
+ * Initialize a new list with an array.
+ *
+ * @param [in] values `The values to initialize the list with.`
 * @require self.size == 0 "The List must be empty"
 **/
+fn List* List.new_init_with_array(&self, Type[] values, Allocator allocator = allocator::heap())
+{
+	self.new_init(values.len, allocator) @inline;
+	self.add_array(values) @inline;
+	return self;
+}
+
+/**
+ * Initialize a temporary list with an array.
+ *
+ * @param [in] values `The values to initialize the list with.`
+ * @require self.size == 0 "The List must be empty"
+ **/
+fn List* List.temp_init_with_array(&self, Type[] values)
+{
+	self.temp_init(values.len) @inline;
+	self.add_array(values) @inline;
+	return self;
+}
+
+/**
+ * @require self.capacity == 0 "The List must not be allocated"
+ **/
 fn void List.init_wrapping_array(&self, Type[] types, Allocator allocator = allocator::heap())
 {
 	self.allocator = allocator;
-	self.size = types.len;
 	self.capacity = types.len;
 	self.entries = types.ptr;
+	self.set_size(types.len);
 }

 fn usz! List.to_format(&self, Formatter* formatter) @dynamic
@@ -92,19 +112,20 @@ fn String List.to_tstring(&self)

 fn void List.push(&self, Type element) @inline
 {
-	self.ensure_capacity();
-    self.entries[self.size++] = element;
+	self.reserve(1);
+	self.entries[self.set_size(self.size + 1)] = element;
 }

 fn Type! List.pop(&self)
 {
 	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
-	return self.entries[--self.size];
+	defer self.set_size(self.size - 1);
+	return self.entries[self.size - 1];
 }

 fn void List.clear(&self)
 {
-	self.size = 0;
+	self.set_size(0);
 }

 /**
@@ -122,7 +143,8 @@ fn Type! List.pop_first(&self)
 **/
 fn void List.remove_at(&self, usz index)
 {
-	if (!--self.size || index == self.size) return;
+	self.set_size(self.size - 1);
+	if (!self.size || index == self.size) return;
 	self.entries[index .. self.size - 1] = self.entries[index + 1 .. self.size];
 }

@@ -130,24 +152,37 @@ fn void List.add_all(&self, List* other_list)
 {
 	if (!other_list.size) return;
 	self.reserve(other_list.size);
+	usz index = self.set_size(self.size + other_list.size);
 	foreach (&value : other_list)
 	{
-		self.entries[self.size++] = *value;
+		self.entries[index++] = *value;
 	}
 }


-fn Type[] List.to_new_array(&self, Allocator allocator = allocator::heap())
+/**
+ * IMPORTANT The returned array must be freed using free_aligned.
+ **/
+fn Type[] List.to_new_aligned_array(&self, Allocator allocator = allocator::heap())
 {
-	if (!self.size) return Type[] {};
-	Type[] result = allocator::alloc_array(allocator, Type, self.size);
-	result[..] = self.entries[:self.size];
-	return result;
+	return list_common::list_to_new_aligned_array(Type, self, allocator);
+}
+
+/**
+ * @require !type_is_overaligned() : "This function is not available on overaligned types"
+ **/
+macro Type[] List.to_new_array(&self, Allocator allocator = allocator::heap())
+{
+	return list_common::list_to_new_array(Type, self, allocator);
 }

 fn Type[] List.to_tarray(&self)
 {
+	$if type_is_overaligned():
+	return self.to_new_aligned_array(allocator::temp());
+	$else
 	return self.to_new_array(allocator::temp());
+	$endif;
 }

 /**
@@ -155,13 +190,7 @@ fn Type[] List.to_tarray(&self)
 **/
 fn void List.reverse(&self)
 {
-	if (self.size < 2) return;
-	usz half = self.size / 2U;
-	usz end = self.size - 1;
-	for (usz i = 0; i < half; i++)
-	{
-		@swap(self.entries[i], self.entries[end - i]);
-	}
+	list_common::list_reverse(self);
 }

 fn Type[] List.array_view(&self)
@@ -169,14 +198,18 @@ fn Type[] List.array_view(&self)
 	return self.entries[:self.size];
 }

+/**
+ * Add the values of an array to this list.
+ *
+ * @param [in] array
+ * @ensure self.size >= array.len
+ **/
 fn void List.add_array(&self, Type[] array)
 {
 	if (!array.len) return;
 	self.reserve(array.len);
-	foreach (&value : array)
-	{
-		self.entries[self.size++] = *value;
-	}
+	usz index = self.set_size(self.size + array.len);
+	self.entries[index : array.len] = array[..];
 }

 fn void List.push_front(&self, Type type) @inline
@@ -185,16 +218,16 @@ fn void List.push_front(&self, Type type) @inline
 }

 /**
- * @require index < self.size
+ * @require index <= self.size
 **/
 fn void List.insert_at(&self, usz index, Type type)
 {
-	self.ensure_capacity();
+	self.reserve(1);
 	for (usz i = self.size; i > index; i--)
 	{
 		self.entries[i] = self.entries[i - 1];
 	}
-	self.size++;
+	self.set_size(self.size + 1);
 	self.entries[index] = type;
 }

@@ -209,7 +242,7 @@ fn void List.set_at(&self, usz index, Type type)
 fn void! List.remove_last(&self) @maydiscard
 {
 	if (!self.size) return IteratorResult.NO_MORE_ELEMENT?;
-	self.size--;
+	self.set_size(self.size - 1);
 }

 fn void! List.remove_first(&self) @maydiscard
@@ -252,8 +285,15 @@ fn Type List.get(&self, usz index) @inline

 fn void List.free(&self)
 {
-	if (!self.allocator) return;
-	allocator::free_aligned(self.allocator, self.entries);
+	if (!self.allocator || !self.capacity) return;
+
+	self.pre_free(); // Remove sanitizer annotation
+
+	$if type_is_overaligned():
+		allocator::free_aligned(self.allocator, self.entries);
+	$else
+		allocator::free(self.allocator, self.entries);
+	$endif;
 	self.capacity = 0;
 	self.size = 0;
 	self.entries = null;
@@ -270,7 +310,7 @@ fn void List.swap(&self, usz i, usz j)
 **/
 fn usz List.remove_if(&self, ElementPredicate filter)
 {
-	return self._remove_if(filter, false);
+	return list_common::list_remove_if(self, filter, false);
 }

 /**
@@ -279,80 +319,46 @@ fn usz List.remove_if(&self, ElementPredicate filter)
 **/
 fn usz List.retain_if(&self, ElementPredicate selection)
 {
-	return self._remove_if(selection, true);
-}
-
-macro usz List._remove_if(&self, ElementPredicate filter, bool $invert) @local
-{
-	usz size = self.size;
-	for (usz i = size, usz k = size; k > 0; k = i)
-	{
-		// Find last index of item to be deleted.
-		$if $invert:
-			while (i > 0 && !filter(&self.entries[i - 1])) i--;
-		$else
-			while (i > 0 && filter(&self.entries[i - 1])) i--;
-		$endif
-		// Remove the items from this index up to the one not to be deleted.
-		usz n = self.size - k;
-		self.entries[i:n] = self.entries[k:n];
-		self.size -= k - i;
-		// Find last index of item not to be deleted.
-		$if $invert:
-			while (i > 0 && filter(&self.entries[i - 1])) i--;
-		$else
-			while (i > 0 && !filter(&self.entries[i - 1])) i--;
-		$endif
-	}
-	return size - self.size;
+	return list_common::list_remove_if(self, selection, true);
 }

 fn usz List.remove_using_test(&self, ElementTest filter, any context)
 {
-	return self._remove_using_test(filter, false, context);
+	usz old_size = self.size;
+	defer {
+		if (old_size != self.size) self._update_size_change(old_size, self.size);
+	}
+	return list_common::list_remove_using_test(self, filter, false, context);
 }

+
+
 fn usz List.retain_using_test(&self, ElementTest filter, any context)
 {
-	return self._remove_using_test(filter, true, context);
-}
-
-macro usz List._remove_using_test(&self, ElementTest filter, bool $invert, ctx) @local
-{
-	usz size = self.size;
-	for (usz i = size, usz k = size; k > 0; k = i)
-	{
-		// Find last index of item to be deleted.
-		$if $invert:
-			while (i > 0 && !filter(&self.entries[i - 1], ctx)) i--;
-		$else
-			while (i > 0 && filter(&self.entries[i - 1], ctx)) i--;
-		$endif
-		// Remove the items from this index up to the one not to be deleted.
-		usz n = self.size - k;
-		self.entries[i:n] = self.entries[k:n];
-		self.size -= k - i;
-		// Find last index of item not to be deleted.
-		$if $invert:
-			while (i > 0 && filter(&self.entries[i - 1], ctx)) i--;
-		$else
-			while (i > 0 && !filter(&self.entries[i - 1], ctx)) i--;
-		$endif
+	usz old_size = self.size;
+	defer {
+		if (old_size != self.size) self._update_size_change(old_size, self.size);
 	}
-	return size - self.size;
+	return list_common::list_remove_using_test(self, filter, true, context);
 }

-/**
- * Reserve at least min_capacity
- **/
-fn void List.reserve(&self, usz min_capacity)
+fn void List.ensure_capacity(&self, usz min_capacity) @local
 {
 	if (!min_capacity) return;
 	if (self.capacity >= min_capacity) return;
 	if (!self.allocator) self.allocator = allocator::heap();
+
+	self.pre_free(); // Remove sanitizer annotation
+
 	min_capacity = math::next_power_of_2(min_capacity);
-	self.entries = allocator::realloc_aligned(self.allocator, self.entries, Type.sizeof * min_capacity, .alignment = Type[1].alignof) ?? null;
+	$if type_is_overaligned():
+		self.entries = allocator::realloc_aligned(self.allocator, self.entries, Type.sizeof * min_capacity, .alignment = Type[1].alignof)!!;
+	$else
+		self.entries = allocator::realloc(self.allocator, self.entries, Type.sizeof * min_capacity);
+	$endif;
 	self.capacity = min_capacity;
+
+	self.post_alloc(); // Add sanitizer annotation
 }

 macro Type List.@item_at(&self, usz index) @operator([])
@@ -370,7 +376,7 @@ fn void List.set(&self, usz index, Type value) @operator([]=)
 	self.entries[index] = value;
 }

-fn void List.ensure_capacity(&self, usz added = 1) @inline @private
+fn void List.reserve(&self, usz added)
 {
 	usz new_size = self.size + added;
 	if (self.capacity >= new_size) return;
@@ -378,7 +384,40 @@ fn void List.ensure_capacity(&self, usz added = 1) @inline @private
 	assert(new_size < usz.max / 2U);
 	usz new_capacity = self.capacity ? 2U * self.capacity : 16U;
 	while (new_capacity < new_size) new_capacity *= 2U;
-	self.reserve(new_capacity);
+	self.ensure_capacity(new_capacity);
+}
+
+fn void List._update_size_change(&self,usz old_size, usz new_size)
+{
+	if (old_size == new_size) return;
+	sanitizer::annotate_contiguous_container(self.entries,
+	                                         &self.entries[self.capacity],
+	                                         &self.entries[old_size],
+	                                         &self.entries[new_size]);
+}
+/**
+ * @require new_size == 0 || self.capacity != 0
+ **/
+fn usz List.set_size(&self, usz new_size) @inline @private
+{
+	usz old_size = self.size;
+	self._update_size_change(old_size, new_size);
+	self.size = new_size;
+	return old_size;
+}
+
+macro void List.pre_free(&self) @private
+{
+	if (!self.capacity) return;
+	self._update_size_change(self.size, self.capacity);
+}
+
+/**
+ * @require self.capacity
+ **/
+macro void List.post_alloc(&self) @private
+{
+	self._update_size_change(self.capacity, self.size);
 }

 // Functions for equatable types
@@ -428,13 +467,12 @@ fn bool List.contains(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
 	return false;
 }

-
 /**
 * @param [&inout] self "The list to remove elements from"
 * @param value "The value to remove"
 * @return "true if the value was found"
 **/
-fn bool List.remove_last_match(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+fn bool List.remove_last_item(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
 {
 	return @ok(self.remove_at(self.rindex_of(value)));
 }
@@ -444,35 +482,34 @@ fn bool List.remove_last_match(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
 * @param value "The value to remove"
 * @return "true if the value was found"
 **/
-fn bool List.remove_first_match(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+fn bool List.remove_first_item(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
 {
 	return @ok(self.remove_at(self.index_of(value)));
 }
-
 /**
 * @param [&inout] self "The list to remove elements from"
 * @param value "The value to remove"
 * @return "the number of deleted elements."
 **/
-fn usz List.remove_all_matches(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
+fn usz List.remove_item(&self, Type value) @if(ELEMENT_IS_EQUATABLE)
 {
-	usz size = self.size;
-	for (usz i = size; i > 0; i--)
-	{
-		if (!equals(self.entries[i - 1], value)) continue;
-		for (usz j = i; j < self.size; j++)
-		{
-			self.entries[j - 1] = self.entries[j];
-		}
-		self.size--;
+	usz old_size = self.size;
+	defer {
+		if (old_size != self.size) self._update_size_change(old_size, self.size);
 	}
-	return size - self.size;
+	return list_common::list_remove_item(self, value);
 }

+
+
 fn void List.remove_all_from(&self, List* other_list) @if(ELEMENT_IS_EQUATABLE)
 {
 	if (!other_list.size) return;
-	foreach (v : other_list) self.remove_all_matches(v);
+	usz old_size = self.size;
+	defer {
+		if (old_size != self.size) self._update_size_change(old_size, self.size);
+	}
+	foreach (v : other_list) self.remove_item(v);
 }

 /**
@@ -488,15 +525,42 @@ fn usz List.compact_count(&self) @if(ELEMENT_IS_POINTER)

 fn usz List.compact(&self) @if(ELEMENT_IS_POINTER)
 {
-	usz size = self.size;
-	for (usz i = size; i > 0; i--)
-	{
-		if (self.entries[i - 1]) continue;
-		for (usz j = i; j < size; j++)
-		{
-			self.entries[j - 1] = self.entries[j];
-		}
-		self.size--;
+	usz old_size = self.size;
+	defer {
+		if (old_size != self.size) self._update_size_change(old_size, self.size);
 	}
-	return size - self.size;
+	return list_common::list_compact(self);
+}
+
+// --> Deprecated
+
+/**
+ * @param [&inout] self "The list to remove elements from"
+ * @param value "The value to remove"
+ * @return "true if the value was found"
+ **/
+fn bool List.remove_last_match(&self, Type value) @if(ELEMENT_IS_EQUATABLE) @deprecated
+{
+	return self.remove_last_item(value) @inline;
+}
+
+/**
+ * @param [&inout] self "The list to remove elements from"
+ * @param value "The value to remove"
+ * @return "true if the value was found"
+ **/
+fn bool List.remove_first_match(&self, Type value) @if(ELEMENT_IS_EQUATABLE) @deprecated
+{
+	return self.remove_first_item(value) @inline;
+}
+
+
+/**
+ * @param [&inout] self "The list to remove elements from"
+ * @param value "The value to remove"
+ * @return "the number of deleted elements."
+ **/
+fn usz List.remove_all_matches(&self, Type value) @if(ELEMENT_IS_EQUATABLE) @deprecated
+{
+	return self.remove_item(value) @inline;
 }
--- a/lib/std/collections/list_common.c3
+++ b/lib/std/collections/list_common.c3
@@ -0,0 +1,112 @@
+module std::collections::list_common;
+
+/**
+ * IMPORTANT The returned array must be freed using free_aligned.
+ **/
+macro list_to_new_aligned_array($Type, self, Allocator allocator)
+{
+	if (!self.size) return $Type[] {};
+	$Type[] result = allocator::alloc_array_aligned(allocator, $Type, self.size);
+	result[..] = self.entries[:self.size];
+	return result;
+}
+
+macro list_to_new_array($Type, self, Allocator allocator)
+{
+	if (!self.size) return $Type[] {};
+	$Type[] result = allocator::alloc_array(allocator, $Type, self.size);
+	result[..] = self.entries[:self.size];
+	return result;
+}
+
+macro void list_reverse(self)
+{
+	if (self.size < 2) return;
+	usz half = self.size / 2U;
+	usz end = self.size - 1;
+	for (usz i = 0; i < half; i++)
+	{
+		@swap(self.entries[i], self.entries[end - i]);
+	}
+}
+
+macro usz list_remove_using_test(self, filter, bool $invert, ctx)
+{
+	usz size = self.size;
+	for (usz i = size, usz k = size; k > 0; k = i)
+	{
+		// Find last index of item to be deleted.
+		$if $invert:
+			while (i > 0 && !filter(&self.entries[i - 1], ctx)) i--;
+		$else
+			while (i > 0 && filter(&self.entries[i - 1], ctx)) i--;
+		$endif
+		// Remove the items from this index up to the one not to be deleted.
+		usz n = self.size - k;
+		self.entries[i:n] = self.entries[k:n];
+		self.size -= k - i;
+		// Find last index of item not to be deleted.
+		$if $invert:
+			while (i > 0 && filter(&self.entries[i - 1], ctx)) i--;
+		$else
+			while (i > 0 && !filter(&self.entries[i - 1], ctx)) i--;
+		$endif
+	}
+	return size - self.size;
+}
+
+macro usz list_compact(self)
+{
+	usz size = self.size;
+	for (usz i = size; i > 0; i--)
+	{
+		if (self.entries[i - 1]) continue;
+		for (usz j = i; j < size; j++)
+		{
+			self.entries[j - 1] = self.entries[j];
+		}
+		self.size--;
+	}
+	return size - self.size;
+}
+
+macro usz list_remove_item(self, value)
+{
+	usz size = self.size;
+	for (usz i = size; i > 0; i--)
+	{
+		if (!equals(self.entries[i - 1], value)) continue;
+		for (usz j = i; j < self.size; j++)
+		{
+			self.entries[j - 1] = self.entries[j];
+		}
+		self.size--;
+	}
+	return size - self.size;
+}
+
+
+macro usz list_remove_if(self, filter, bool $invert)
+{
+	usz size = self.size;
+	for (usz i = size, usz k = size; k > 0; k = i)
+	{
+		// Find last index of item to be deleted.
+		$if $invert:
+			while (i > 0 && !filter(&self.entries[i - 1])) i--;
+		$else
+			while (i > 0 && filter(&self.entries[i - 1])) i--;
+		$endif
+		// Remove the items from this index up to the one not to be deleted.
+		usz n = self.size - k;
+		self.entries[i:n] = self.entries[k:n];
+		self.size -= k - i;
+		// Find last index of item not to be deleted.
+		$if $invert:
+			while (i > 0 && filter(&self.entries[i - 1])) i--;
+		$else
+			while (i > 0 && !filter(&self.entries[i - 1])) i--;
+		$endif
+	}
+	return size - self.size;
+}
--- a/lib/std/collections/map.c3
+++ b/lib/std/collections/map.c3
@@ -10,7 +10,9 @@ const float DEFAULT_LOAD_FACTOR = 0.75;
 const VALUE_IS_EQUATABLE = Value.is_eq;
 const bool COPY_KEYS = types::implements_copy(Key);

-struct HashMap
+distinct Map = void*;
+
+struct MapImpl
 {
 	Entry*[] table;
 	Allocator allocator;
@@ -20,77 +22,72 @@ struct HashMap
 }

 /**
- * @param [&inout] allocator "The allocator to use"
 * @require capacity > 0 "The capacity must be 1 or higher"
 * @require load_factor > 0.0 "The load factor must be higher than 0"
- * @require !self.allocator "Map was already initialized"
 * @require capacity < MAXIMUM_CAPACITY "Capacity cannot exceed maximum"
 **/
-fn HashMap* HashMap.new_init(&self, uint capacity = DEFAULT_INITIAL_CAPACITY, float load_factor = DEFAULT_LOAD_FACTOR, Allocator allocator = allocator::heap())
+fn Map new(uint capacity = DEFAULT_INITIAL_CAPACITY, float load_factor = DEFAULT_LOAD_FACTOR, Allocator allocator = allocator::heap())
 {
-	capacity = math::next_power_of_2(capacity);
-	self.allocator = allocator;
-	self.load_factor = load_factor;
-	self.threshold = (uint)(capacity * load_factor);
-	self.table = allocator::new_array(allocator, Entry*, capacity);
-	return self;
+	MapImpl* map = allocator::alloc(allocator, MapImpl);
+	_init(map, capacity, load_factor, allocator);
+	return (Map)map;
 }

 /**
 * @require capacity > 0 "The capacity must be 1 or higher"
 * @require load_factor > 0.0 "The load factor must be higher than 0"
- * @require !self.allocator "Map was already initialized"
 * @require capacity < MAXIMUM_CAPACITY "Capacity cannot exceed maximum"
 **/
-fn HashMap* HashMap.temp_init(&self, uint capacity = DEFAULT_INITIAL_CAPACITY, float load_factor = DEFAULT_LOAD_FACTOR)
+fn Map temp(uint capacity = DEFAULT_INITIAL_CAPACITY, float load_factor = DEFAULT_LOAD_FACTOR)
 {
-	return self.new_init(capacity, load_factor, allocator::temp()) @inline;
-}
-
-
-/**
- * Has this hash map been initialized yet?
- *
- * @param [&in] map "The hash map we are testing"
- * @return "Returns true if it has been initialized, false otherwise"
- **/
-fn bool HashMap.is_initialized(&map)
-{
-	return (bool)map.allocator;
-}
-
-/**
- * @param [&inout] allocator "The allocator to use"
- * @param [&in] other_map "The map to copy from."
- **/
-fn HashMap* HashMap.new_init_from_map(&self, HashMap* other_map, Allocator allocator = allocator::heap())
-{
-	self.new_init(other_map.table.len, other_map.load_factor, allocator);
-	self.put_all_for_create(other_map);
-	return self;
+	MapImpl* map = mem::temp_alloc(MapImpl);
+	_init(map, capacity, load_factor, allocator::temp());
+	return (Map)map;
 }

 /**
 * @param [&in] other_map "The map to copy from."
 **/
-fn HashMap* HashMap.temp_init_from_map(&map, HashMap* other_map)
+fn Map new_from_map(Map other_map, Allocator allocator = null)
 {
-	return map.new_init_from_map(other_map, allocator::temp()) @inline;
+	MapImpl* other_map_impl = (MapImpl*)other_map;
+	if (!other_map_impl)
+	{
+		if (allocator) return new(.allocator = allocator);
+		return null;
+	}
+	MapImpl* map = (MapImpl*)new(other_map_impl.table.len, other_map_impl.load_factor, allocator ?: allocator::heap());
+	if (!other_map_impl.count) return (Map)map;
+	foreach (Entry *e : other_map_impl.table)
+    {
+    	if (!e) continue;
+    	map._put_for_create(e.key, e.value);
+    }
+	return (Map)map;
 }

-fn bool HashMap.is_empty(&map) @inline
+/**
+ * @param [&in] other_map "The map to copy from."
+ **/
+fn Map temp_from_map(Map other_map)
 {
-	return !map.count;
+	return new_from_map(other_map, allocator::temp());
 }

-fn usz HashMap.len(&map) @inline
+fn bool Map.is_empty(map) @inline
 {
-	return map.count;
+	return !map || !((MapImpl*)map).count;
 }

-fn Value*! HashMap.get_ref(&map, Key key)
+fn usz Map.len(map) @inline
 {
-	if (!map.count) return SearchResult.MISSING?;
+	return map ? ((MapImpl*)map).count : 0;
+}
+
+fn Value*! Map.get_ref(self, Key key)
+{
+	MapImpl *map = (MapImpl*)self;
+	if (!map || !map.count) return SearchResult.MISSING?;
 	uint hash = rehash(key.hash());
 	for (Entry *e = map.table[index_for(hash, map.table.len)]; e != null; e = e.next)
 	{
@@ -99,11 +96,12 @@ fn Value*! HashMap.get_ref(&map, Key key)
 	return SearchResult.MISSING?;
 }

-fn Entry*! HashMap.get_entry(&map, Key key)
+fn Entry*! Map.get_entry(map, Key key)
 {
-	if (!map.count) return SearchResult.MISSING?;
+	MapImpl *map_impl = (MapImpl*)map;
+	if (!map_impl || !map_impl.count) return SearchResult.MISSING?;
 	uint hash = rehash(key.hash());
-	for (Entry *e = map.table[index_for(hash, map.table.len)]; e != null; e = e.next)
+	for (Entry *e = map_impl.table[index_for(hash, map_impl.table.len)]; e != null; e = e.next)
 	{
 		if (e.hash == hash && equals(key, e.key)) return e;
 	}
@@ -114,9 +112,10 @@ fn Entry*! HashMap.get_entry(&map, Key key)
 * Get the value or update and
 * @require $assignable(#expr, Value)
 **/
-macro Value HashMap.@get_or_set(&map, Key key, Value #expr)
+macro Value Map.@get_or_set(&self, Key key, Value #expr)
 {
-	if (!map.count)
+	MapImpl *map = (MapImpl*)*self;
+	if (!map || !map.count)
 	{
 		Value val = #expr;
 		map.set(key, val);
@@ -133,23 +132,27 @@ macro Value HashMap.@get_or_set(&map, Key key, Value #expr)
 	return val;
 }

-fn Value! HashMap.get(&map, Key key) @operator([])
+fn Value! Map.get(map, Key key) @operator([])
 {
 	return *map.get_ref(key) @inline;
 }

-fn bool HashMap.has_key(&map, Key key)
+fn bool Map.has_key(map, Key key)
 {
 	return @ok(map.get_ref(key));
 }

-fn bool HashMap.set(&map, Key key, Value value) @operator([]=)
+macro Value Map.set_value_return(&map, Key key, Value value) @operator([]=)
+{
+	map.set(key, value);
+	return value;
+}
+
+fn bool Map.set(&self, Key key, Value value)
 {
 	// If the map isn't initialized, use the defaults to initialize it.
-	if (!map.allocator)
-	{
-		map.new_init();
-	}
+	if (!*self) *self = new();
+	MapImpl* map = (MapImpl*)*self;
 	uint hash = rehash(key.hash());
 	uint index = index_for(hash, map.table.len);
 	for (Entry *e = map.table[index]; e != null; e = e.next)
@@ -160,18 +163,19 @@ fn bool HashMap.set(&map, Key key, Value value) @operator([]=)
 			return true;
 		}
 	}
-	map.add_entry(hash, key, value, index);
+	map._add_entry(hash, key, value, index);
 	return false;
 }

-fn void! HashMap.remove(&map, Key key) @maydiscard
+fn void! Map.remove(map, Key key) @maydiscard
 {
-	if (!map.remove_entry_for_key(key)) return SearchResult.MISSING?;
+	if (!map || !((MapImpl*)map)._remove_entry_for_key(key)) return SearchResult.MISSING?;
 }

-fn void HashMap.clear(&map)
+fn void Map.clear(self)
 {
-	if (!map.count) return;
+	MapImpl* map = (MapImpl*)self;
+	if (!map || !map.count) return;
 	foreach (Entry** &entry_ref : map.table)
 	{
 		Entry* entry = *entry_ref;
@@ -181,30 +185,33 @@ fn void HashMap.clear(&map)
 		{
 			Entry *to_delete = next;
 			next = next.next;
-			map.free_entry(to_delete);
+			map._free_entry(to_delete);
 		}
-		map.free_entry(entry);
+		map._free_entry(entry);
 		*entry_ref = null;
 	}
 	map.count = 0;
 }

-fn void HashMap.free(&map)
+fn void Map.free(self)
 {
-	if (!map.allocator) return;
-	map.clear();
-	map.free_internal(map.table.ptr);
+	if (!self) return;
+	MapImpl* map = (MapImpl*)self;
+	self.clear();
+	map._free_internal(map.table.ptr);
 	map.table = {};
+	allocator::free(map.allocator, map);
 }

-fn Key[] HashMap.key_tlist(&map)
+fn Key[] Map.temp_keys_list(map)
 {
-	return map.key_new_list(allocator::temp()) @inline;
+	return map.new_keys_list(allocator::temp()) @inline;
 }

-fn Key[] HashMap.key_new_list(&map, Allocator allocator = allocator::heap())
+fn Key[] Map.new_keys_list(self, Allocator allocator = allocator::heap())
 {
-	if (!map.count) return {};
+	MapImpl* map = (MapImpl*)self;
+	if (!map || !map.count) return {};

 	Key[] list = allocator::alloc_array(allocator, Key, map.count);
 	usz index = 0;
@@ -219,36 +226,36 @@ fn Key[] HashMap.key_new_list(&map, Allocator allocator = allocator::heap())
 	return list;
 }

-macro HashMap.@each(map; @body(key, value))
+macro Map.@each(map; @body(key, value))
 {
 	map.@each_entry(; Entry* entry) {
 		@body(entry.key, entry.value);
 	};
 }

-macro HashMap.@each_entry(map; @body(entry))
+macro Map.@each_entry(self; @body(entry))
 {
-	if (map.count)
+	MapImpl *map = (MapImpl*)self;
+	if (!map || !map.count) return;
+	foreach (Entry* entry : map.table)
 	{
-		foreach (Entry* entry : map.table)
+		while (entry)
 		{
-			while (entry)
-			{
-				@body(entry);
-				entry = entry.next;
-			}
+			@body(entry);
+			entry = entry.next;
 		}
 	}
 }

-fn Value[] HashMap.value_tlist(&map)
+fn Value[] Map.temp_values_list(map)
 {
-	return map.value_new_list(allocator::temp()) @inline;
+	return map.new_values_list(allocator::temp()) @inline;
 }

-fn Value[] HashMap.value_new_list(&map, Allocator allocator = allocator::heap())
+fn Value[] Map.new_values_list(self, Allocator allocator = allocator::heap())
 {
-	if (!map.count) return {};
+	MapImpl* map = (MapImpl*)self;
+	if (!map || !map.count) return {};
 	Value[] list = allocator::alloc_array(allocator, Value, map.count);
 	usz index = 0;
 	foreach (Entry* entry : map.table)
@@ -262,9 +269,10 @@ fn Value[] HashMap.value_new_list(&map, Allocator allocator = allocator::heap())
 	return list;
 }

-fn bool HashMap.has_value(&map, Value v) @if(VALUE_IS_EQUATABLE)
+fn bool Map.has_value(self, Value v) @if(VALUE_IS_EQUATABLE)
 {
-	if (!map.count) return false;
+	MapImpl* map = (MapImpl*)self;
+	if (!map || !map.count) return false;
 	foreach (Entry* entry : map.table)
 	{
 		while (entry)
@@ -278,7 +286,7 @@ fn bool HashMap.has_value(&map, Value v) @if(VALUE_IS_EQUATABLE)

 // --- private methods

-fn void HashMap.add_entry(&map, uint hash, Key key, Value value, uint bucket_index) @private
+fn void MapImpl._add_entry(&map, uint hash, Key key, Value value, uint bucket_index) @private
 {
 	$if COPY_KEYS:
 	key = key.copy(map.allocator);
@@ -287,11 +295,11 @@ fn void HashMap.add_entry(&map, uint hash, Key key, Value value, uint bucket_ind
 	map.table[bucket_index] = entry;
 	if (map.count++ >= map.threshold)
 	{
-		map.resize(map.table.len * 2);
+		map._resize(map.table.len * 2);
 	}
 }

-fn void HashMap.resize(&map, uint new_capacity) @private
+fn void MapImpl._resize(&map, uint new_capacity) @private
 {
 	Entry*[] old_table = map.table;
 	uint old_capacity = old_table.len;
@@ -301,9 +309,9 @@ fn void HashMap.resize(&map, uint new_capacity) @private
 		return;
 	}
 	Entry*[] new_table = allocator::new_array(map.allocator, Entry*, new_capacity);
-	map.transfer(new_table);
+	map._transfer(new_table);
 	map.table = new_table;
-	map.free_internal(old_table.ptr);
+	map._free_internal(old_table.ptr);
 	map.threshold = (uint)(new_capacity * map.load_factor);
 }

@@ -318,7 +326,7 @@ macro uint index_for(uint hash, uint capacity) @private
 	return hash & (capacity - 1);
 }

-fn void HashMap.transfer(&map, Entry*[] new_table) @private
+fn void MapImpl._transfer(&map, Entry*[] new_table) @private
 {
 	Entry*[] src = map.table;
 	uint new_capacity = new_table.len;
@@ -337,17 +345,18 @@ fn void HashMap.transfer(&map, Entry*[] new_table) @private
 	}
 }

-fn void HashMap.put_all_for_create(&map, HashMap* other_map) @private
+fn void _init(MapImpl* impl, uint capacity, float load_factor, Allocator allocator) @private
 {
-	if (!other_map.count) return;
-	foreach (Entry *e : other_map.table)
-	{
-		if (!e) continue;
-		map.put_for_create(e.key, e.value);
-	}
+	capacity = math::next_power_of_2(capacity);
+	*impl = {
+		.allocator = allocator,
+    	.load_factor = load_factor,
+    	.threshold = (uint)(capacity * load_factor),
+    	.table = allocator::new_array(allocator, Entry*, capacity)
+	};
 }

-fn void HashMap.put_for_create(&map, Key key, Value value) @private
+fn void MapImpl._put_for_create(&map, Key key, Value value) @private
 {
 	uint hash = rehash(key.hash());
 	uint i = index_for(hash, map.table.len);
@@ -359,16 +368,17 @@ fn void HashMap.put_for_create(&map, Key key, Value value) @private
 			return;
 		}
 	}
-	map.create_entry(hash, key, value, i);
+	map._create_entry(hash, key, value, i);
 }

-fn void HashMap.free_internal(&map, void* ptr) @inline @private
+fn void MapImpl._free_internal(&map, void* ptr) @inline @private
 {
 	allocator::free(map.allocator, ptr);
 }

-fn bool HashMap.remove_entry_for_key(&map, Key key) @private
+fn bool MapImpl._remove_entry_for_key(&map, Key key) @private
 {
+	if (!map.count) return false;
 	uint hash = rehash(key.hash());
 	uint i = index_for(hash, map.table.len);
 	Entry* prev = map.table[i];
@@ -387,7 +397,7 @@ fn bool HashMap.remove_entry_for_key(&map, Key key) @private
 			{
 				prev.next = next;
 			}
-			map.free_entry(e);
+			map._free_entry(e);
 			return true;
 		}
 		prev = e;
@@ -396,7 +406,7 @@ fn bool HashMap.remove_entry_for_key(&map, Key key) @private
 	return false;
 }

-fn void HashMap.create_entry(&map, uint hash, Key key, Value value, int bucket_index) @private
+fn void MapImpl._create_entry(&map, uint hash, Key key, Value value, int bucket_index) @private
 {
 	Entry *e = map.table[bucket_index];
 	$if COPY_KEYS:
@@ -407,12 +417,12 @@ fn void HashMap.create_entry(&map, uint hash, Key key, Value value, int bucket_i
 	map.count++;
 }

-fn void HashMap.free_entry(&self, Entry *entry) @local
+fn void MapImpl._free_entry(&self, Entry *entry) @local
 {
 	$if COPY_KEYS:
 	allocator::free(self.allocator, entry.key);
 	$endif
-	self.free_internal(entry);
+	self._free_internal(entry);
 }

 struct Entry
@@ -421,4 +431,4 @@ struct Entry
 	Key key;
 	Value value;
 	Entry* next;
-}
+}
--- a/lib/std/collections/object.c3
+++ b/lib/std/collections/object.c3
@@ -48,9 +48,9 @@ fn usz! Object.to_format(&self, Formatter* formatter) @dynamic
 			return n;
 		case ObjectInternalMap:
 			usz n = formatter.printf("{")!;
-			@pool()
+			@stack_mem(1024; Allocator mem)
 			{
-				foreach (i, key : self.map.key_tlist())
+				foreach (i, key : self.map.key_new_list(mem))
 				{
 					if (i > 0) n += formatter.printf(",")!;
 					n += formatter.printf(`"%s":`, key)!;
@@ -190,7 +190,6 @@ fn void Object.set_object(&self, String key, Object* new_object) @private
 macro Object* Object.object_from_value(&self, value) @private
 {
 	var $Type = $typeof(value);
-
 	$switch
 		$case types::is_int($Type):
 			return new_int(value, self.allocator);
--- a/lib/std/core/allocators/dynamic_arena.c3
+++ b/lib/std/core/allocators/dynamic_arena.c3
@@ -24,12 +24,14 @@ fn void DynamicArenaAllocator.init(&self, usz page_size, Allocator allocator)
 	self.backing_allocator = allocator;
 }

+import std::io;
 fn void DynamicArenaAllocator.free(&self)
 {
 	DynamicArenaPage* page = self.page;
 	while (page)
 	{
 		DynamicArenaPage* next_page = page.prev_arena;
+		allocator::free(self.backing_allocator, page.memory);
 		allocator::free(self.backing_allocator, page);
 		page = next_page;
 	}
@@ -37,6 +39,7 @@ fn void DynamicArenaAllocator.free(&self)
 	while (page)
 	{
 		DynamicArenaPage* next_page = page.prev_arena;
+		allocator::free(self.backing_allocator, page.memory);
 		allocator::free(self.backing_allocator, page);
 		page = next_page;
 	}
@@ -131,8 +134,8 @@ fn void DynamicArenaAllocator.reset(&self, usz mark = 0) @dynamic
 fn void*! DynamicArenaAllocator._alloc_new(&self, usz size, usz alignment) @local
 {
 	// First, make sure that we can align it, extending the page size if needed.
-	usz page_size = max(self.page_size, mem::aligned_offset(size + DynamicArenaChunk.sizeof, alignment));
-
+	usz page_size = max(self.page_size, mem::aligned_offset(size + DynamicArenaChunk.sizeof + alignment, alignment));
+	assert(page_size > size + DynamicArenaChunk.sizeof);
 	// Grab the page without alignment (we do it ourselves)
 	void* mem = allocator::malloc_try(self.backing_allocator, page_size)!;
 	DynamicArenaPage*! page = allocator::new_try(self.backing_allocator, DynamicArenaPage);
--- a/lib/std/core/allocators/libc_allocator.c3
+++ b/lib/std/core/allocators/libc_allocator.c3
@@ -79,7 +79,7 @@ fn void*! LibcAllocator.acquire(&self, usz bytes, AllocInitType init_type, usz a
 	{
 		if (alignment > 0)
 		{
-			return win32::_aligned_recalloc(null, bytes, alignment) ?: AllocationFailure.OUT_OF_MEMORY?;
+			return win32::_aligned_recalloc(null, 1, bytes, alignment) ?: AllocationFailure.OUT_OF_MEMORY?;
 		}
 		return libc::calloc(1, bytes) ?: AllocationFailure.OUT_OF_MEMORY?;
 	}
--- a/lib/std/core/allocators/temp_allocator.c3
+++ b/lib/std/core/allocators/temp_allocator.c3
@@ -45,6 +45,13 @@ fn TempAllocator*! new_temp_allocator(usz size, Allocator allocator)
 	return temp;
 }

+fn void TempAllocator.destroy(&self)
+{
+	self.reset(0);
+	if (self.last_page) (void)self._free_page(self.last_page);
+	allocator::free(self.backing_allocator, self);
+}
+
 fn usz TempAllocator.mark(&self) @dynamic => self.used;

 fn void TempAllocator.release(&self, void* old_pointer, bool) @dynamic
@@ -53,6 +60,7 @@ fn void TempAllocator.release(&self, void* old_pointer, bool) @dynamic
 	if (old_pointer + old_size == &self.data[self.used])
 	{
 		self.used -= old_size;
+		asan::poison_memory_region(&self.data[self.used], old_size);
 	}
 }
 fn void TempAllocator.reset(&self, usz mark) @dynamic
@@ -65,6 +73,19 @@ fn void TempAllocator.reset(&self, usz mark) @dynamic
 		self._free_page(to_free)!!;
 	}
 	self.last_page = last_page;
+	$if env::COMPILER_SAFE_MODE || env::ADDRESS_SANITIZER:
+		if (!last_page)
+		{
+			usz cleaned = self.used - mark;
+			if (cleaned > 0)
+			{
+				$if env::COMPILER_SAFE_MODE:
+					self.data[mark : cleaned] = 0xAA;
+				$endif
+				asan::poison_memory_region(&self.data[mark], cleaned);
+			}
+		}
+	$endif
 	self.used = mark;
 }

@@ -130,9 +151,10 @@ fn void*! TempAllocator.acquire(&self, usz size, AllocInitType init_type, usz al
 	}
 	usz new_usage = (usz)(mem - start_mem) + size;

-	// Arena alignment, simple!
+	// Arena allocation, simple!
 	if (new_usage <= self.capacity)
 	{
+		asan::unpoison_memory_region(starting_ptr, new_usage - self.used);
 		TempAllocatorChunk* chunk_start = mem - TempAllocatorChunk.sizeof;
 		chunk_start.size = size;
 		self.used = new_usage;
--- a/lib/std/core/builtin.c3
+++ b/lib/std/core/builtin.c3
@@ -7,26 +7,19 @@ import libc, std::hash, std::io, std::os::backtrace;
 /**
 * Use `IteratorResult` when reading the end of an iterator, or accessing a result out of bounds.
 **/
-fault IteratorResult
-{
-	NO_MORE_ELEMENT
-}
+fault IteratorResult { NO_MORE_ELEMENT }

 /**
 * Use `SearchResult` when trying to return a value from some collection but the element is missing.
 **/
-fault SearchResult
-{
-	MISSING
-}
+fault SearchResult { MISSING }

 /**
 * Use `CastResult` when an attempt at conversion fails.
 **/
-fault CastResult
-{
-	TYPE_MISMATCH
-}
+fault CastResult { TYPE_MISMATCH }
+
+def VoidFn = fn void();

 /**
 * Stores a variable on the stack, then restores it at the end of the
@@ -143,7 +136,9 @@ fn void panicf(String fmt, String file, String function, uint line, args...)
 **/
 macro void unreachable(String string = "Unreachable statement reached.", ...) @builtin @noreturn
 {
-	panicf(string, $$FILE, $$FUNC, $$LINE, $vasplat());
+	$if env::COMPILER_SAFE_MODE:
+	panicf(string, $$FILE, $$FUNC, $$LINE, $vasplat);
+	$endif;
 	$$unreachable();
 }

@@ -153,10 +148,18 @@ macro void unreachable(String string = "Unreachable statement reached.", ...) @b
 **/
 macro void unsupported(String string = "Unsupported function invoked") @builtin @noreturn
 {
-	panicf(string, $$FILE, $$FUNC, $$LINE, $vasplat());
+	panicf(string, $$FILE, $$FUNC, $$LINE, $vasplat);
 	$$unreachable();
 }

+/**
+ * Unconditionally break into an attached debugger when reached.
+ **/
+macro void breakpoint() @builtin
+{
+	$$breakpoint();
+}
+
 macro any_make(void* ptr, typeid type) @builtin
 {
 	return $$any_make(ptr, type);
@@ -290,12 +293,12 @@ macro @prefetch(void* ptr, PrefetchLocality $locality = VERY_NEAR, bool $write =

 macro swizzle(v, ...) @builtin
 {
-	return $$swizzle(v, $vasplat());
+	return $$swizzle(v, $vasplat);
 }

 macro swizzle2(v, v2, ...) @builtin
 {
-	return $$swizzle2(v, v2, $vasplat());
+	return $$swizzle2(v, v2, $vasplat);
 }

 macro anyfault @catch(#expr) @builtin
@@ -315,6 +318,11 @@ macro char[] @as_char_view(&value) @builtin
 	return ((char*)value)[:$sizeof(*value)];
 }

+macro isz @str_find(String $string, String $needle) @builtin => $$str_find($string, $needle);
+macro String @str_upper(String $str) @builtin => $$str_upper($str);
+macro String @str_lower(String $str) @builtin => $$str_lower($str);
+macro uint @str_hash(String $str) @builtin => $$str_hash($str);
+
 macro uint int.hash(int i) => i;
 macro uint uint.hash(uint i) => i;
 macro uint short.hash(short s) => s;
@@ -331,6 +339,11 @@ macro uint String.hash(String c) => (uint)fnv32a::encode(c);
 macro uint char[].hash(char[] c) => (uint)fnv32a::encode(c);
 macro uint void*.hash(void* ptr) => ((ulong)(uptr)ptr).hash();

+distinct EmptySlot = void*;
+const EmptySlot EMPTY_MACRO_SLOT @builtin = null;
+macro @is_empty_macro_slot(#arg) @builtin => @typeis(#arg, EmptySlot);
+macro @is_valid_macro_slot(#arg) @builtin => !@typeis(#arg, EmptySlot);
+
 const MAX_FRAMEADDRESS = 128;
 /**
 * @require n >= 0
@@ -663,7 +676,7 @@ fn void install_signal_handler(CInt signal, SignalFunction func) @local
 }

 // Clean this up
-fn void install_signal_handlers() @init(101) @local
+fn void install_signal_handlers() @init(101) @local @if(env::BACKTRACE)
 {
 	install_signal_handler(libc::SIGBUS, &sig_bus_error);
 	install_signal_handler(libc::SIGSEGV, &sig_segmentation_fault);
--- a/lib/std/core/builtin_comparison.c3
+++ b/lib/std/core/builtin_comparison.c3
@@ -4,7 +4,7 @@
 module std::core::builtin;

 /**
- * @require types::is_comparable_value(a) && types::is_comparable_value(b)
+ * @require types::@comparable_value(a) && types::@comparable_value(b)
 **/
 macro less(a, b) @builtin
 {
@@ -19,7 +19,7 @@ macro less(a, b) @builtin
 }

 /**
- * @require types::is_comparable_value(a) && types::is_comparable_value(b)
+ * @require types::@comparable_value(a) && types::@comparable_value(b)
 **/
 macro less_eq(a, b) @builtin
 {
@@ -34,7 +34,7 @@ macro less_eq(a, b) @builtin
 }

 /**
- * @require types::is_comparable_value(a) && types::is_comparable_value(b)
+ * @require types::@comparable_value(a) && types::@comparable_value(b)
 **/
 macro greater(a, b) @builtin
 {
@@ -49,7 +49,7 @@ macro greater(a, b) @builtin
 }

 /**
- * @require types::is_comparable_value(a) && types::is_comparable_value(b)
+ * @require types::@comparable_value(a) && types::@comparable_value(b)
 **/
 macro int compare_to(a, b) @builtin
 {
@@ -63,7 +63,7 @@ macro int compare_to(a, b) @builtin
 	$endswitch
 }
 /**
- * @require types::is_comparable_value(a) && types::is_comparable_value(b)
+ * @require types::@comparable_value(a) && types::@comparable_value(b)
 **/
 macro greater_eq(a, b) @builtin
 {
@@ -78,7 +78,7 @@ macro greater_eq(a, b) @builtin
 }

 /**
- * @require types::is_equatable_value(a) && types::is_equatable_value(b) `values must be equatable`
+ * @require types::@equatable_value(a) && types::@equatable_value(b) `values must be equatable`
 **/
 macro bool equals(a, b) @builtin
 {
@@ -97,13 +97,13 @@ macro bool equals(a, b) @builtin
 macro min(x, ...) @builtin
 {
 	$if $vacount == 1:
-		return less(x, $vaarg(0)) ? x : $vaarg(0);
+		return less(x, $vaarg[0]) ? x : $vaarg[0];
 	$else
 		var result = x;
 		$for (var $i = 0; $i < $vacount; $i++)
-			if (less($vaarg($i), result))
+			if (less($vaarg[$i], result))
 			{
-				 result = $vaarg($i);
+				 result = $vaarg[$i];
 			}
 		$endfor
 		return result;
@@ -113,13 +113,13 @@ macro min(x, ...) @builtin
 macro max(x, ...) @builtin
 {
 	$if $vacount == 1:
-		return greater(x, $vaarg(0)) ? x : $vaarg(0);
+		return greater(x, $vaarg[0]) ? x : $vaarg[0];
 	$else
 		var result = x;
 		$for (var $i = 0; $i < $vacount; $i++)
-			if (greater($vaarg($i), result))
+			if (greater($vaarg[$i], result))
 			{
-				 result = $vaarg($i);
+				 result = $vaarg[$i];
 			}
 		$endfor
 		return result;
--- a/lib/std/core/conv.c3
+++ b/lib/std/core/conv.c3
@@ -108,14 +108,14 @@ fn usz char32_to_utf8_unsafe(Char32 c, char** output)
 {
 	switch
 	{
-		case c < 0x7f:
+		case c <= 0x7f:
 			(*output)++[0] = (char)c;
 			return 1;
-		case c < 0x7ff:
+		case c <= 0x7ff:
 			(*output)++[0] = (char)(0xC0 | c >> 6);
 			(*output)++[0] = (char)(0x80 | (c & 0x3F));
 			return 2;
-		case c < 0xffff:
+		case c <= 0xffff:
 			(*output)++[0] = (char)(0xE0 | c >> 12);
 			(*output)++[0] = (char)(0x80 | (c >> 6 & 0x3F));
 			(*output)++[0] = (char)(0x80 | (c & 0x3F));
@@ -210,11 +210,11 @@ fn usz utf8len_for_utf32(Char32[] utf32)
 	{
 		switch (true)
 		{
-			case uc < 0x7f:
+			case uc <= 0x7f:
 				len++;
-			case uc < 0x7ff:
+			case uc <= 0x7ff:
 				len += 2;
-			case uc < 0xffff:
+			case uc <= 0xffff:
 				len += 3;
 			default:
 				len += 4;
@@ -237,12 +237,12 @@ fn usz utf8len_for_utf16(Char16[] utf16)
 		Char16 c = utf16[i];
 		if (c & UTF16_SURROGATE_GENERIC_MASK != UTF16_SURROGATE_GENERIC_VALUE)
 		{
-			if (c < 0x7f)
+			if (c <= 0x7f)
 			{
 				len++;
 				continue;
 			}
-			if (c < 0x7ff)
+			if (c <= 0x7ff)
 			{
 				len += 2;
 				continue;
--- a/lib/std/core/dstring.c3
+++ b/lib/std/core/dstring.c3
@@ -48,6 +48,56 @@ fn DString new(String c = "", Allocator allocator = allocator::heap())

 fn DString temp_new(String s = "") => new(s, allocator::temp()) @inline;

+
+fn void DString.replace_char(self, char ch, char replacement)
+{
+	StringData* data = self.data();
+	foreach (&c : data.chars[:data.len])
+	{
+		if (*c == ch) *c = replacement;
+	}
+}
+
+fn void DString.replace(&self, String needle, String replacement)
+{
+	StringData* data = self.data();
+	usz needle_len = needle.len;
+	if (!data || data.len < needle_len) return;
+	usz replace_len = replacement.len;
+	if (needle_len == 1 && replace_len == 1)
+	{
+		self.replace_char(needle[0], replacement[0]);
+		return;
+	}
+	@pool(data.allocator) {
+		String str = self.tcopy_str();
+		self.clear();
+		usz len = str.len;
+		usz match = 0;
+		foreach (i, c : str)
+		{
+			if (c == needle[match])
+    	    {
+    	        match++;
+    		    if (match == needle_len)
+    		    {
+    			    self.append_chars(replacement);
+    			    match = 0;
+    			    continue;
+    		    }
+    		    continue;
+    		}
+    		if (match > 0)
+    		{
+    		    self.append_chars(str[i - match:match]);
+    		    match = 0;
+    		}
+    		self.append_char(c);
+    	}
+    	if (match > 0) self.append_chars(str[^match:match]);
+	};
+}
+
 fn DString DString.new_concat(self, DString b, Allocator allocator = allocator::heap())
 {
 	DString string;
@@ -371,18 +421,26 @@ fn void DString.insert_at(&self, usz index, String s)

 fn usz! DString.appendf(&self, String format, args...) @maydiscard
 {
-	Formatter formatter;
-	formatter.init(&out_string_append_fn, self);
-	return formatter.vprintf(format, args);
+	if (!self.data()) self.new_init(format.len + 20);
+	@pool(self.data().allocator)
+	{
+		Formatter formatter;
+		formatter.init(&out_string_append_fn, self);
+		return formatter.vprintf(format, args);
+	};
 }

 fn usz! DString.appendfn(&self, String format, args...) @maydiscard
 {
-	Formatter formatter;
-	formatter.init(&out_string_append_fn, self);
-	usz len = formatter.vprintf(format, args)!;
-	self.append('\n');
-	return len + 1;
+	if (!self.data()) self.new_init(format.len + 20);
+	@pool(self.data().allocator)
+	{
+		Formatter formatter;
+		formatter.init(&out_string_append_fn, self);
+		usz len = formatter.vprintf(format, args)!;
+		self.append('\n');
+		return len + 1;
+	};
 }

 fn DString new_join(String[] s, String joiner, Allocator allocator = allocator::heap())
--- a/lib/std/core/env.c3
+++ b/lib/std/core/env.c3
@@ -112,10 +112,13 @@ enum ArchType
 	WASM64,       // WebAssembly with 64-bit pointers
 	RSCRIPT32,    // 32-bit RenderScript
 	RSCRIPT64,    // 64-bit RenderScript
+	XTENSA,       // Xtensa
 }

 const OsType OS_TYPE = (OsType)$$OS_TYPE;
 const ArchType ARCH_TYPE = (ArchType)$$ARCH_TYPE;
+const bool ARCH_32_BIT = $$REGISTER_SIZE == 32;
+const bool ARCH_64_BIT = $$REGISTER_SIZE == 64;
 const bool LIBC = $$COMPILER_LIBC_AVAILABLE;
 const bool NO_LIBC = !$$COMPILER_LIBC_AVAILABLE;
 const CompilerOptLevel COMPILER_OPT_LEVEL = (CompilerOptLevel)$$COMPILER_OPT_LEVEL;
@@ -126,6 +129,7 @@ const bool F128_SUPPORT = $$PLATFORM_F128_SUPPORTED;
 const REGISTER_SIZE = $$REGISTER_SIZE;
 const bool COMPILER_SAFE_MODE = $$COMPILER_SAFE_MODE;
 const bool DEBUG_SYMBOLS = $$DEBUG_SYMBOLS;
+const bool BACKTRACE = $$BACKTRACE;
 const usz LLVM_VERSION = $$LLVM_VERSION;
 const bool BENCHMARKING = $$BENCHMARKING;
 const bool TESTING = $$TESTING;
@@ -144,8 +148,12 @@ const bool FREEBSD = LIBC && OS_TYPE == FREEBSD;
 const bool NETBSD = LIBC && OS_TYPE == NETBSD;
 const bool WASI = LIBC && OS_TYPE == WASI;
 const bool WASM_NOLIBC @builtin = !LIBC && ARCH_TYPE == ArchType.WASM32 || ARCH_TYPE == ArchType.WASM64;
+const bool ADDRESS_SANITIZER = $$ADDRESS_SANITIZER;
+const bool MEMORY_SANITIZER = $$MEMORY_SANITIZER;
+const bool THREAD_SANITIZER = $$THREAD_SANITIZER;
+const bool ANY_SANITIZER = ADDRESS_SANITIZER || MEMORY_SANITIZER || THREAD_SANITIZER;

-macro bool os_is_darwin()
+macro bool os_is_darwin() @const
 {
 	$switch (OS_TYPE)
 	$case IOS:
@@ -158,7 +166,7 @@ macro bool os_is_darwin()
 	$endswitch
 }

-macro bool os_is_posix()
+macro bool os_is_posix() @const
 {
 	$switch (OS_TYPE)
 	$case IOS:
--- a/lib/std/core/mem.c3
+++ b/lib/std/core/mem.c3
@@ -8,6 +8,10 @@ import std::math;
 const MAX_MEMORY_ALIGNMENT = 0x1000_0000;
 const DEFAULT_MEM_ALIGNMENT = (void*.alignof) * 2;

+macro bool @constant_is_power_of_2($x) @const @private
+{
+	return $x != 0 && ($x & ($x - 1)) == 0;
+}

 /**
 * Load a vector from memory according to a mask assuming default alignment.
@@ -37,7 +41,7 @@ macro masked_load(ptr, bool[<*>] mask, passthru)
 * @require $assignable(&&passthru, $typeof(ptr)) : "Pointer and passthru must match"
 * @require @typekind(passthru) == VECTOR : "Expected passthru to be a vector"
 * @require passthru.len == mask.len : "Mask and passthru must have the same length"
- * @require math::is_power_of_2($alignment) : "The alignment must be a power of two"
+ * @require @constant_is_power_of_2($alignment) : "The alignment must be a power of two"
 *
 * @return "A vector with the loaded values where the mask is true, passthru where the mask is false"
 **/
@@ -80,7 +84,7 @@ macro gather(ptrvec, bool[<*>] mask, passthru)
 * @require $assignable(&&passthru[0], $typeof(ptrvec[0])) : "Pointer and passthru must match"
 * @require passthru.len == mask.len : "Mask and passthru must have the same length"
 * @require mask.len == ptrvec.len : "Mask and ptrvec must have the same length"
- * @require math::is_power_of_2($alignment) : "The alignment must be a power of two"
+ * @require @constant_is_power_of_2($alignment) : "The alignment must be a power of two"
 *
 * @return "A vector with the loaded values where the mask is true, passthru where the mask is false"
 **/
@@ -115,7 +119,7 @@ macro masked_store(ptr, value, bool[<*>] mask)
 * @require $assignable(&&value, $typeof(ptr)) : "Pointer and value must match"
 * @require @typekind(value) == VECTOR : "Expected value to be a vector"
 * @require value.len == mask.len : "Mask and value must have the same length"
- * @require math::is_power_of_2($alignment) : "The alignment must be a power of two"
+ * @require @constant_is_power_of_2($alignment) : "The alignment must be a power of two"
 *
 **/
 macro @masked_store_aligned(ptr, value, bool[<*>] mask, usz $alignment)
@@ -150,13 +154,39 @@ macro scatter(ptrvec, value, bool[<*>] mask)
 * @require $assignable(&&value[0], $typeof(ptrvec[0])) : "Pointer and value must match"
 * @require value.len == mask.len : "Mask and value must have the same length"
 * @require mask.len == ptrvec.len : "Mask and ptrvec must have the same length"
- * @require math::is_power_of_2($alignment) : "The alignment must be a power of two"
+ * @require @constant_is_power_of_2($alignment) : "The alignment must be a power of two"
 **/
 macro @scatter_aligned(ptrvec, value, bool[<*>] mask, usz $alignment)
 {
 	return $$scatter(ptrvec, value, mask, $alignment);
 }

+/**
+ * @param [in] x "The variable or dereferenced pointer to load."
+ * @param $alignment "The alignment to assume for the load"
+ * @return "The value of x"
+ *
+ * @require @constant_is_power_of_2($alignment) : "The alignment must be a power of two"
+ **/
+macro @unaligned_load(&x, usz $alignment) @builtin
+{
+	return $$unaligned_load(x, $alignment);
+}
+
+/**
+ * @param [out] x "The variable or dereferenced pointer to store to."
+ * @param value "The value to store."
+ * @param $alignment "The alignment to assume for the store"
+ * @return "The value of x"
+ *
+ * @require $assignable(value, $typeof(*x)) : "The value doesn't match the variable"
+ * @require @constant_is_power_of_2($alignment) : "The alignment must be a power of two"
+ **/
+macro @unaligned_store(&x, value, usz $alignment) @builtin
+{
+	return $$unaligned_store(x, ($typeof(*x))value, $alignment);
+}
+
 macro @volatile_load(&x) @builtin
 {
 	return $$volatile_load(x);
@@ -498,14 +528,11 @@ macro void @pool(TempAllocator* #other_temp = null; @body) @builtin
 	@body();
 }

-
-
-
 import libc;


 module std::core::mem @if(WASM_NOLIBC);
-
+import std::core::mem::allocator @public;
 SimpleHeapAllocator wasm_allocator @private;
 extern int __heap_base;

@@ -516,8 +543,8 @@ fn void initialize_wasm_mem() @init(1) @private
 	uptr start = (uptr)&__heap_base;
 	if (start > mem::DEFAULT_MEM_ALIGNMENT) allocator::wasm_memory.use = start;
 	wasm_allocator.init(fn (x) => allocator::wasm_memory.allocate_block(x));
-	temp_base_allocator = &wasm_allocator;
 	allocator::thread_allocator = &wasm_allocator;
+	allocator::init_default_temp_allocators();
 }

 module std::core::mem;
@@ -547,6 +574,15 @@ fn void* malloc(usz size) @builtin @inline @nodiscard
 	return allocator::malloc(allocator::heap(), size);
 }

+/**
+ * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
+ * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
+ **/
+fn void* malloc_aligned(usz size, usz alignment) @builtin @inline @nodiscard
+{
+	return allocator::malloc_aligned(allocator::heap(), size, alignment)!!;
+}
+
 fn void* tmalloc(usz size, usz alignment = 0) @builtin @inline @nodiscard
 {
 	if (!size) return null;
@@ -555,7 +591,7 @@ fn void* tmalloc(usz size, usz alignment = 0) @builtin @inline @nodiscard

 /**
 * @require $vacount < 2 : "Too many arguments."
- * @require $or($vacount == 0, $assignable($vaexpr(0), $Type)) : "The second argument must be an initializer for the type"
+ * @require $vacount == 0 ||| $assignable($vaexpr[0], $Type) : "The second argument must be an initializer for the type"
 * @require $Type.alignof <= DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'alloc_aligned' instead"
 **/
 macro new($Type, ...) @nodiscard
@@ -564,7 +600,7 @@ macro new($Type, ...) @nodiscard
 		return ($Type*)calloc($Type.sizeof);
 	$else
 		$Type* val = malloc($Type.sizeof);
-		*val = $vaexpr(0);
+		*val = $vaexpr[0];
 		return val;
 	$endif
 }
@@ -573,7 +609,7 @@ macro new($Type, ...) @nodiscard
 * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
 * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
 * @require $vacount < 2 : "Too many arguments."
- * @require $or($vacount == 0, $assignable($vaexpr(0), $Type)) : "The second argument must be an initializer for the type"
+ * @require $vacount == 0 ||| $assignable($vaexpr[0], $Type) : "The second argument must be an initializer for the type"
 **/
 macro new_aligned($Type, ...) @nodiscard
 {
@@ -581,7 +617,7 @@ macro new_aligned($Type, ...) @nodiscard
 		return ($Type*)calloc_aligned($Type.sizeof, $Type.alignof);
 	$else
 		$Type* val = malloc_aligned($Type.sizeof, $Type.alignof);
-		*val = $vaexpr(0);
+		*val = $vaexpr[0];
 		return val;
 	$endif
 }
@@ -605,7 +641,7 @@ macro alloc_aligned($Type) @nodiscard

 /**
 * @require $vacount < 2 : "Too many arguments."
- * @require $or($vacount == 0, $assignable($vaexpr(0), $Type)) : "The second argument must be an initializer for the type"
+ * @require $vacount == 0 ||| $assignable($vaexpr[0], $Type) : "The second argument must be an initializer for the type"
 **/
 macro temp_new($Type, ...) @nodiscard
 {
@@ -613,7 +649,7 @@ macro temp_new($Type, ...) @nodiscard
 		return ($Type*)tcalloc($Type.sizeof) @inline;
 	$else
 		$Type* val = tmalloc($Type.sizeof) @inline;
-		*val = $vaexpr(0);
+		*val = $vaexpr[0];
 		return val;
 	$endif
 }
@@ -655,7 +691,7 @@ macro alloc_array($Type, usz elements) @nodiscard
 **/
 macro alloc_array_aligned($Type, usz elements) @nodiscard
 {
-	return allocator::alloc_array(allocator::heap(), $Type, elements);
+	return allocator::alloc_array_aligned(allocator::heap(), $Type, elements);
 }

 macro temp_alloc_array($Type, usz elements) @nodiscard
@@ -673,6 +709,10 @@ fn void* calloc(usz size) @builtin @inline @nodiscard
 	return allocator::calloc(allocator::heap(), size);
 }

+/**
+ * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
+ * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
+ **/
 fn void* calloc_aligned(usz size, usz alignment) @builtin @inline @nodiscard
 {
 	return allocator::calloc_aligned(allocator::heap(), size, alignment)!!;
--- a/lib/std/core/mem_allocator.c3
+++ b/lib/std/core/mem_allocator.c3
@@ -49,7 +49,7 @@ fault AllocationFailure

 fn usz alignment_for_allocation(usz alignment) @inline @private
 {
-	return alignment < mem::DEFAULT_MEM_ALIGNMENT ? alignment = mem::DEFAULT_MEM_ALIGNMENT : alignment;
+	return alignment < mem::DEFAULT_MEM_ALIGNMENT ? mem::DEFAULT_MEM_ALIGNMENT : alignment;
 }

 macro void* malloc(Allocator allocator, usz size) @nodiscard
@@ -147,8 +147,9 @@ macro void free_aligned(Allocator allocator, void* ptr)
 }

 /**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'new_aligned' instead"
 * @require $vacount < 2 : "Too many arguments."
- * @require $or($vacount == 0, $assignable($vaexpr(0), $Type)) : "The second argument must be an initializer for the type"
+ * @require $vacount == 0 ||| $assignable($vaexpr[0], $Type) : "The second argument must be an initializer for the type"
 **/
 macro new(Allocator allocator, $Type, ...) @nodiscard
 {
@@ -156,14 +157,15 @@ macro new(Allocator allocator, $Type, ...) @nodiscard
 		return ($Type*)calloc(allocator, $Type.sizeof);
 	$else
 		$Type* val = malloc(allocator, $Type.sizeof);
-		*val = $vaexpr(0);
+		*val = $vaexpr[0];
 		return val;
 	$endif
 }

 /**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'new_aligned' instead"
 * @require $vacount < 2 : "Too many arguments."
- * @require $or($vacount == 0, $assignable($vaexpr(0), $Type)) : "The second argument must be an initializer for the type"
+ * @require $vacount == 0 ||| $assignable($vaexpr[0], $Type) : "The second argument must be an initializer for the type"
 **/
 macro new_try(Allocator allocator, $Type, ...) @nodiscard
 {
@@ -171,56 +173,114 @@ macro new_try(Allocator allocator, $Type, ...) @nodiscard
 		return ($Type*)calloc_try(allocator, $Type.sizeof);
 	$else
 		$Type* val = malloc_try(allocator, $Type.sizeof)!;
-		*val = $vaexpr(0);
+		*val = $vaexpr[0];
 		return val;
 	$endif
 }

+/**
+ * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
+ * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
+ * @require $vacount < 2 : "Too many arguments."
+ * @require $vacount == 0 ||| $assignable($vaexpr[0], $Type) : "The second argument must be an initializer for the type"
+ **/
+macro new_aligned($Type, ...) @nodiscard
+{
+	$if $vacount == 0:
+		return ($Type*)calloc_aligned(allocator, $Type.sizeof, $Type.alignof);
+	$else
+		$Type* val = malloc_aligned(allocator, $Type.sizeof, $Type.alignof);
+		*val = $vaexpr[0];
+		return val;
+	$endif
+}
+
+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT
+ **/
 macro new_with_padding(Allocator allocator, $Type, usz padding) @nodiscard
 {
 	return ($Type*)calloc_try(allocator, $Type.sizeof + padding);
 }

+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'alloc_aligned' instead"
+ **/
 macro alloc(Allocator allocator, $Type) @nodiscard
 {
 	return ($Type*)malloc(allocator, $Type.sizeof);
 }

+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'alloc_aligned' instead"
+ **/
 macro alloc_try(Allocator allocator, $Type) @nodiscard
 {
 	return ($Type*)malloc_try(allocator, $Type.sizeof);
 }

+/**
+ * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
+ * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
+ **/
+macro alloc_aligned(Allocator allocator, $Type) @nodiscard
+{
+	return ($Type*)malloc_aligned(allocator, $Type.sizeof, $Type.alignof);
+}
+
+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT
+ **/
 macro alloc_with_padding(Allocator allocator, $Type, usz padding) @nodiscard
 {
 	return ($Type*)malloc_try(allocator, $Type.sizeof + padding);
 }

+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'new_array_aligned' instead"
+ **/
 macro new_array(Allocator allocator, $Type, usz elements) @nodiscard
 {
 	return new_array_try(allocator, $Type, elements)!!;
 }

+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'new_array_aligned' instead"
+ **/
 macro new_array_try(Allocator allocator, $Type, usz elements) @nodiscard
 {
 	return (($Type*)calloc_try(allocator, $Type.sizeof * elements))[:elements];
 }

+/**
+ * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
+ * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
+ **/
 macro new_array_aligned(Allocator allocator, $Type, usz elements) @nodiscard
 {
-	return ((Type*)calloc_aligned(allocator, $Type.sizeof * elements, $Type.alignof))[:elements]!!;
+	return (($Type*)calloc_aligned(allocator, $Type.sizeof * elements, $Type.alignof))[:elements]!!;
 }

+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'alloc_array_aligned' instead"
+ **/
 macro alloc_array(Allocator allocator, $Type, usz elements) @nodiscard
 {
 	return alloc_array_try(allocator, $Type, elements)!!;
 }

+/**
+ * Allocate using an aligned allocation. This is necessary for types with a default memory alignment
+ * exceeding DEFAULT_MEM_ALIGNMENT. IMPORTANT! It must be freed using free_aligned.
+ **/
 macro alloc_array_aligned(Allocator allocator, $Type, usz elements) @nodiscard
 {
-	return ((Type*)malloc_aligned(allocator, $Type.sizeof * elements, $Type.alignof))[:elements]!!;
+	return (($Type*)malloc_aligned(allocator, $Type.sizeof * elements, $Type.alignof))[:elements]!!;
 }

+/**
+ * @require $Type.alignof <= mem::DEFAULT_MEM_ALIGNMENT : "Types with alignment exceeding the default must use 'alloc_array_aligned' instead"
+ **/
 macro alloc_array_try(Allocator allocator, $Type, usz elements) @nodiscard
 {
 	return (($Type*)malloc_try(allocator, $Type.sizeof * elements))[:elements];
@@ -335,6 +395,23 @@ fn void init_default_temp_allocators() @private
 	thread_temp_allocator = temp_allocator_pair[0];
 }

+fn void destroy_temp_allocators_after_exit() @finalizer(65535) @local @if(env::LIBC)
+{
+	destroy_temp_allocators();
+}
+
+/**
+ * Call this to destroy any memory used by the temp allocators. This will invalidate all temp memory.
+ **/
+fn void destroy_temp_allocators()
+{
+	if (!thread_temp_allocator) return;
+	temp_allocator_pair[0].destroy();
+	temp_allocator_pair[1].destroy();
+	temp_allocator_pair[..] = null;
+	thread_temp_allocator = null;
+}
+
 fn TempAllocator* temp_allocator_next() @private
 {
 	if (!thread_temp_allocator)
@@ -344,4 +421,4 @@ fn TempAllocator* temp_allocator_next() @private
 	}
 	usz index = thread_temp_allocator == temp_allocator_pair[0] ? 1 : 0;
 	return thread_temp_allocator = temp_allocator_pair[index];
-}
+}
--- a/lib/std/core/private/macho_runtime.c3
+++ b/lib/std/core/private/macho_runtime.c3
@@ -175,7 +175,7 @@ fn void runtime_startup() @public @export("__c3_runtime_startup")
 	}
 	assert(runtime_state == RUN_CTORS);
 	runtime_state = READ_DYLIB;
-	ctor = null;
+	ctor_first = null;
 }

 fn void runtime_finalize() @public @export("__c3_runtime_finalize")
--- a/lib/std/core/private/main_stub.c3
+++ b/lib/std/core/private/main_stub.c3
@@ -84,19 +84,19 @@ macro void release_wargs(String[] list) @private
 	free(list.ptr);
 }

-macro int @win_to_err_main_noargs(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_err_main_noargs(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	if (catch #m()) return 1;
 	return 0;
 }
-macro int @win_to_int_main_noargs(#m, void* handle, Char16* cmd_line, int show_cmd) => #m();
-macro int @win_to_void_main_noargs(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_int_main_noargs(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd) => #m();
+macro int @win_to_void_main_noargs(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	#m();
 	return 0;
 }

-macro int @win_to_err_main_args(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_err_main_args(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	String[] args = win_command_line_to_strings(cmd_line);
 	defer release_wargs(args);
@@ -104,14 +104,14 @@ macro int @win_to_err_main_args(#m, void* handle, Char16* cmd_line, int show_cmd
 	return 0;
 }

-macro int @win_to_int_main_args(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_int_main_args(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	String[] args = win_command_line_to_strings(cmd_line);
 	defer release_wargs(args);
 	return #m(args);
 }

-macro int @win_to_void_main_args(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_void_main_args(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	String[] args = win_command_line_to_strings(cmd_line);
 	defer release_wargs(args);
@@ -119,26 +119,26 @@ macro int @win_to_void_main_args(#m, void* handle, Char16* cmd_line, int show_cm
 	return 0;
 }

-macro int @win_to_err_main(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_err_main(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	String[] args = win_command_line_to_strings(cmd_line);
 	defer release_wargs(args);
-	if (catch #m(handle, args, show_cmd)) return 1;
+	if (catch #m(handle, prev_handle, args, show_cmd)) return 1;
 	return 0;
 }

-macro int @win_to_int_main(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_int_main(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	String[] args = win_command_line_to_strings(cmd_line);
 	defer release_wargs(args);
-	return #m(handle, args, show_cmd);
+	return #m(handle, prev_handle, args, show_cmd);
 }

-macro int @win_to_void_main(#m, void* handle, Char16* cmd_line, int show_cmd)
+macro int @win_to_void_main(#m, void* handle, void* prev_handle, Char16* cmd_line, int show_cmd)
 {
 	String[] args = win_command_line_to_strings(cmd_line);
 	defer release_wargs(args);
-	#m(handle, args, show_cmd);
+	#m(handle, prev_handle, args, show_cmd);
 	return 0;
 }

--- a/lib/std/core/sanitizer/asan.c3
+++ b/lib/std/core/sanitizer/asan.c3
@@ -0,0 +1,127 @@
+// Add this to your code to suppress leak detection or set other default options
+// fn ZString __asan_default_options() @export("__asan_default_options") @if(env::ADDRESS_SANITIZER)
+// {
+//   return "detect_leaks=0";
+// }
+
+// Add this to break on error
+// asan::set_error_report_callback(fn (ZString err)
+// {
+//   breakpoint();
+// });
+
+module std::core::sanitizer::asan;
+
+def ErrorCallback = fn void (ZString);
+
+/**
+ * Marks a memory region ([addr, addr+size)) as unaddressable.
+ *
+ * This memory must be previously allocated by your program. Instrumented
+ * code is forbidden from accessing addresses in this region until it is
+ * unpoisoned. This function is not guaranteed to poison the entire region -
+ * it could poison only a subregion of [addr, addr+size) due to ASan
+ * alignment restrictions.
+ *
+ * NOTE This function is not thread-safe because no two threads can poison or
+ * unpoison memory in the same memory region simultaneously.
+ *
+ * @param addr "Start of memory region."
+ * @param size "Size of memory region."
+ **/
+macro poison_memory_region(void* addr, usz size)
+{
+	$if env::ADDRESS_SANITIZER: 
+		__asan_poison_memory_region(addr, size);
+	$endif 
+}
+
+/**
+ * Marks a memory region ([addr, addr+size)) as addressable.
+ *
+ * This memory must be previously allocated by your program. Accessing
+ * addresses in this region is allowed until this region is poisoned again.
+ * This function could unpoison a super-region of [addr, addr+size) due
+ * to ASan alignment restrictions.
+ *
+ * NOTE This function is not thread-safe because no two threads can
+ * poison or unpoison memory in the same memory region simultaneously.
+ *
+ * @param addr "Start of memory region."
+ * @param size "Size of memory region."
+ **/
+macro unpoison_memory_region(void* addr, usz size)
+{
+	$if env::ADDRESS_SANITIZER: 
+		__asan_unpoison_memory_region(addr, size);
+	$endif 
+}
+
+/**
+ * Checks if an address is poisoned.
+ * @return "True if 'addr' is poisoned (that is, 1-byte read/write access to this address would result in an error report from ASan). Otherwise returns false."
+ * @param addr "Address to check."
+ **/
+macro bool address_is_poisoned(void* addr)
+{
+	$if env::ADDRESS_SANITIZER:
+		return (bool)__asan_address_is_poisoned(addr);
+	$else
+		return false;
+	$endif
+}
+
+/**
+ * Checks if a region is poisoned.
+ *
+ * If at least one byte in [beg, beg+size) is poisoned, returns the
+ * address of the first such byte. Otherwise returns 0.
+ *
+ * @param beg "Start of memory region."
+ * @param size "Start of memory region."
+ * @return "Address of first poisoned byte."
+ **/
+macro void* region_is_poisoned(void* beg, usz size)
+{
+	$if env::ADDRESS_SANITIZER:
+		return __asan_region_is_poisoned(addr);
+	$else
+		return null;
+	$endif
+}
+
+/**
+ * Sets the callback function to be called during ASan error reporting.
+ **/
+fn void set_error_report_callback(ErrorCallback callback)
+{
+	$if env::ADDRESS_SANITIZER:
+		__asan_set_error_report_callback(callback);
+	$endif
+}
+
+module std::core::sanitizer::asan @if(env::ADDRESS_SANITIZER);
+
+extern fn void __asan_poison_memory_region(void* addr, usz size);
+extern fn void __asan_unpoison_memory_region(void* addr, usz size);
+extern fn CInt __asan_address_is_poisoned(void* addr);
+extern fn void* __asan_region_is_poisoned(void* beg, usz size);
+extern fn void __asan_describe_address(void* addr);
+extern fn CInt __asan_report_present();
+extern fn void* __asan_get_report_pc();
+extern fn void* __asan_get_report_bp();
+extern fn void* __asan_get_report_sp();
+extern fn void* __asan_get_report_address();
+extern fn CInt __asan_get_report_access_type();
+extern fn usz __asan_get_report_access_size();
+extern fn ZString __asan_get_report_description();
+extern fn ZString __asan_locate_address(void* addr, char* name, usz name_size, void** region_address, usz* region_size);
+extern fn usz __asan_get_alloc_stack(void* addr, void** trace, usz size, CInt* thread_id);
+extern fn usz __asan_get_free_stack(void* addr, void** trace, usz size, CInt* thread_id);
+extern fn void __asan_get_shadow_mapping(usz* shadow_scale, usz* shadow_offset);
+extern fn void __asan_set_error_report_callback(ErrorCallback callback);
+extern fn void __asan_print_accumulated_stats();
+extern fn void* __asan_get_current_fake_stack();
+extern fn void* __asan_addr_is_in_fake_stack(void* fake_stack, void* addr, void** beg, void** end);
+extern fn void __asan_handle_no_return();
+extern fn CInt __asan_update_allocation_context(void* addr);
--- a/lib/std/core/sanitizer/sanitizer.c3
+++ b/lib/std/core/sanitizer/sanitizer.c3
@@ -0,0 +1,80 @@
+module std::core::sanitizer;
+
+macro void annotate_contiguous_container(void* beg, void* end, void* old_mid, void* new_mid)
+{
+	$if env::ADDRESS_SANITIZER:
+		__sanitizer_annotate_contiguous_container(beg, end, old_mid, new_mid);
+	$endif
+}
+
+macro void annotate_double_ended_contiguous_container(void* storage_beg, void* storage_end, void* old_container_beg, void* old_container_end, void* new_container_beg, void* new_container_end)
+{
+	$if env::ADDRESS_SANITIZER:
+		__sanitizer_annotate_double_ended_contiguous_container(storage_beg, storage_end, old_container_beg, old_container_end, new_container_beg, new_container_end);
+	$endif
+}
+
+macro void print_stack_trace()
+{
+	$if env::ADDRESS_SANITIZER:
+		__sanitizer_print_stack_trace();
+	$endif
+}
+
+fn void set_death_callback(VoidFn callback)
+{
+	$if env::ANY_SANITIZER:
+		__sanitizer_set_death_callback(callback);
+	$endif
+}
+
+module std::core::sanitizer @if (env::ANY_SANITIZER);
+
+struct __Sanitizer_sandbox_arguments
+{
+	CInt coverage_sandboxed;
+	iptr coverage_fd;
+	CUInt coverage_max_block_size;
+}
+
+extern fn void __sanitizer_set_report_path(ZString path);
+extern fn void __sanitizer_set_report_fd(void* fd);
+extern fn ZString __sanitizer_get_report_path();
+extern fn void __sanitizer_sandbox_on_notify(__Sanitizer_sandbox_arguments* args);
+extern fn void __sanitizer_report_error_summary(ZString error_summary);
+extern fn ushort __sanitizer_unaligned_load16(void* p);
+extern fn uint __sanitizer_unaligned_load32(void* p);
+extern fn ulong __sanitizer_unaligned_load64(void* p);
+extern fn void __sanitizer_unaligned_store16(void* p, ushort x);
+extern fn void __sanitizer_unaligned_store32(void* p, uint x);
+extern fn void __sanitizer_unaligned_store64(void* p, ulong x);
+extern fn CInt __sanitizer_acquire_crash_state();
+extern fn void __sanitizer_annotate_contiguous_container(void* beg, void* end, void* old_mid, void* new_mid);
+extern fn void __sanitizer_annotate_double_ended_contiguous_container(void* storage_beg, void* storage_end,
+	void* old_container_beg, void* old_container_end,
+	void* new_container_beg, void* new_container_end);
+extern fn CInt __sanitizer_verify_contiguous_container(void* beg, void* mid, void* end);
+extern fn CInt __sanitizer_verify_double_ended_contiguous_container(
+	void* storage_beg, void* container_beg,
+	void* container_end, void* storage_end);
+extern fn void* __sanitizer_contiguous_container_find_bad_address(void* beg, void* mid, void* end);
+extern fn void* __sanitizer_double_ended_contiguous_container_find_bad_address(
+	void* storage_beg, void* container_beg,
+	void* container_end, void* storage_end);
+
+extern fn void __sanitizer_print_stack_trace();
+extern fn void __sanitizer_symbolize_pc(void* pc, ZString fmt, char* out_buf, usz out_buf_size);
+extern fn void __sanitizer_symbolize_global(void* data_ptr, ZString fmt, char* out_buf, usz out_buf_size);
+extern fn void __sanitizer_set_death_callback(VoidFn callback);
+extern fn void __sanitizer_weak_hook_memcmp(void* called_pc, void* s1, void* s2, usz n, CInt result);
+extern fn void __sanitizer_weak_hook_strncmp(void* called_pc, ZString s1, ZString s2, usz n, CInt result);
+extern fn void __sanitizer_weak_hook_strncasecmp(void* called_pc, ZString s1, ZString s2, usz n, CInt result);
+extern fn void __sanitizer_weak_hook_strcmp(void* called_pc, ZString s1, ZString s2, CInt result);
+extern fn void __sanitizer_weak_hook_strcasecmp(void* called_pc, ZString s1, ZString s2, CInt result);
+extern fn void __sanitizer_weak_hook_strstr(void* called_pc, ZString s1, ZString s2, char* result);
+extern fn void __sanitizer_weak_hook_strcasestr(void* called_pc, ZString s1, ZString s2, char* result);
+extern fn void __sanitizer_weak_hook_memmem(void* called_pc, void* s1, usz len1, void* s2, usz len2, void* result);
+extern fn void __sanitizer_print_memory_profile(usz top_percent, usz max_number_of_contexts);
+extern fn void __sanitizer_start_switch_fiber(void** fake_stack_save, void* bottom, usz size);
+extern fn void __sanitizer_finish_switch_fiber(void* fake_stack_save, void** bottom_old, usz* size_old);
+extern fn CInt __sanitizer_get_module_and_offset_for_pc(void* pc, char* module_path, usz module_path_len, void** pc_offset);
--- a/lib/std/core/sanitizer/tsan.c3
+++ b/lib/std/core/sanitizer/tsan.c3
@@ -0,0 +1,39 @@
+module std::core::sanitizer::tsan;
+
+distinct MutexFlags = inline CUInt;
+
+const MutexFlags MUTEX_LINKER_INIT      = 1 << 0;
+const MutexFlags MUTEX_WRITE_REENTRANT  = 1 << 1;
+const MutexFlags MUTEX_READ_REENTRANT   = 1 << 2;
+const MutexFlags MUTEX_NOT_STATIC       = 1 << 8;
+const MutexFlags MUTEX_READ_LOCK        = 1 << 3;
+const MutexFlags MUTEX_TRY_LOCK         = 1 << 4;
+const MutexFlags MUTEX_TRY_LOCK_FAILED  = 1 << 5;
+const MutexFlags MUTEX_RECURSIVE_LOCK   = 1 << 6;
+const MutexFlags MUTEX_RECURSIVE_UNLOCK = 1 << 7;
+const MutexFlags MUTEX_TRY_READ_LOCK = MUTEX_READ_LOCK | MUTEX_TRY_LOCK;
+const MutexFlags MUTEX_TRY_READ_LOCK_FAILED = MUTEX_TRY_READ_LOCK | MUTEX_TRY_LOCK_FAILED;
+
+macro void mutex_create(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_create(addr, flags); $endif }
+macro void mutex_destroy(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_destroy(addr, flags); $endif }
+macro void mutex_pre_lock(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_pre_lock(addr, flags); $endif }
+macro void mutex_post_lock(void* addr, MutexFlags flags, CInt recursion) { $if env::THREAD_SANITIZER: __tsan_mutex_post_lock(addr, flags, recursion); $endif }
+macro CInt mutex_pre_unlock(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: return __tsan_mutex_pre_unlock(addr, flags); $else return 0; $endif }
+macro void mutex_post_unlock(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_post_unlock(addr, flags); $endif }
+macro void mutex_pre_signal(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_pre_signal(addr, flags); $endif }
+macro void mutex_post_signal(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_post_signal(addr, flags); $endif }
+macro void mutex_pre_divert(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_pre_divert(addr, flags); $endif }
+macro void mutex_post_divert(void* addr, MutexFlags flags) { $if env::THREAD_SANITIZER: __tsan_mutex_post_divert(addr, flags); $endif }
+
+module std::core::sanitizer::tsan @if(env::THREAD_SANITIZER) @private;
+
+extern fn void __tsan_mutex_create(void* addr, CUInt flags);
+extern fn void __tsan_mutex_destroy(void* addr, CUInt flags);
+extern fn void __tsan_mutex_pre_lock(void* addr, CUInt flags);
+extern fn void __tsan_mutex_post_lock(void* addr, CUInt flags, CInt recursion);
+extern fn CInt __tsan_mutex_pre_unlock(void* addr, CUInt flags);
+extern fn void __tsan_mutex_post_unlock(void* addr, CUInt flags);
+extern fn void __tsan_mutex_pre_signal(void* addr, CUInt flags);
+extern fn void __tsan_mutex_post_signal(void* addr, CUInt flags);
+extern fn void __tsan_mutex_pre_divert(void* addr, CUInt flags);
+extern fn void __tsan_mutex_post_divert(void* addr, CUInt flags);
--- a/lib/std/core/string.c3
+++ b/lib/std/core/string.c3
@@ -1,6 +1,7 @@
 module std::core::string;
 import std::ascii;

+distinct String @if(!$defined(String)) = inline char[];
 distinct ZString = inline char*;
 distinct WString = inline Char16*;
 def Char32 = uint;
@@ -39,7 +40,7 @@ fault NumberConversion
 macro String tformat(String fmt, ...)
 {
 	DString str = dstring::temp_with_capacity(fmt.len + $vacount * 8);
-	str.appendf(fmt, $vasplat());
+	str.appendf(fmt, $vasplat);
 	return str.str_view();
 }

@@ -51,7 +52,7 @@ macro String tformat(String fmt, ...)
 macro ZString tformat_zstr(String fmt, ...)
 {
 	DString str = dstring::temp_with_capacity(fmt.len + $vacount * 8);
-	str.appendf(fmt, $vasplat());
+	str.appendf(fmt, $vasplat);
 	return str.zstr_view();
 }

@@ -66,7 +67,7 @@ macro String new_format(String fmt, ..., Allocator allocator = allocator::heap()
 	@pool(allocator)
 	{
 		DString str = dstring::temp_with_capacity(fmt.len + $vacount * 8);
-		str.appendf(fmt, $vasplat());
+		str.appendf(fmt, $vasplat);
 		return str.copy_str(allocator);
 	};
 }
@@ -82,7 +83,7 @@ macro ZString new_format_zstr(String fmt, ..., Allocator allocator = allocator::
 	@pool(allocator)
 	{
 		DString str = dstring::temp_with_capacity(fmt.len + $vacount * 8);
-		str.appendf(fmt, $vasplat());
+		str.appendf(fmt, $vasplat);
 		return str.copy_zstr(allocator);
 	};
 }
--- a/lib/std/core/string_iterator.c3
+++ b/lib/std/core/string_iterator.c3
@@ -13,11 +13,37 @@ fn void StringIterator.reset(&self)

 fn Char32! StringIterator.next(&self)
 {
-	usz len = self.utf8.len;
-	usz current = self.current;
-	if (current >= len) return IteratorResult.NO_MORE_ELEMENT?;
-	usz read = (len - current < 4 ? len - current : 4);
-	Char32 res = conv::utf8_to_char32(&self.utf8[current], &read)!;
-	self.current += read;
-	return res;
+    usz len = self.utf8.len;
+    usz current = self.current;
+    if (current >= len) return IteratorResult.NO_MORE_ELEMENT?;
+    usz read = (len - current < 4 ? len - current : 4);
+    Char32 res = conv::utf8_to_char32(&self.utf8[current], &read)!;
+    self.current += read;
+    return res;
+}
+
+fn Char32! StringIterator.peek(&self)
+{
+    usz len = self.utf8.len;
+    usz current = self.current;
+    if (current >= len) return IteratorResult.NO_MORE_ELEMENT?;
+    usz read = (len - current < 4 ? len - current : 4);
+    Char32 res = conv::utf8_to_char32(&self.utf8[current], &read)!;
+    return res;
+}
+
+fn bool StringIterator.has_next(&self)
+{
+    return self.current < self.utf8.len;
+}
+
+fn Char32! StringIterator.get(&self)
+{
+    usz len = self.utf8.len;
+    usz current = self.current;
+    usz read = (len - current < 4 ? len - current : 4);
+    usz index = current > read ? current - read : 0;
+    if (index >= len) return IteratorResult.NO_MORE_ELEMENT?;
+    Char32 res = conv::utf8_to_char32(&self.utf8[index], &read)!;
+    return res;
 }
--- a/lib/std/core/types.c3
+++ b/lib/std/core/types.c3
@@ -120,10 +120,20 @@ macro bool is_slice_convertable($Type)
 	$endswitch
 }

-macro bool is_bool($Type) => $Type.kindof == TypeKind.BOOL;
-macro bool is_int($Type) => $Type.kindof == TypeKind.SIGNED_INT || $Type.kindof == TypeKind.UNSIGNED_INT;
+macro bool is_bool($Type) @const => $Type.kindof == TypeKind.BOOL;
+macro bool is_int($Type) @const  => $Type.kindof == TypeKind.SIGNED_INT || $Type.kindof == TypeKind.UNSIGNED_INT;

-macro bool is_intlike($Type)
+macro bool is_indexable($Type) @const
+{
+	return $defined($Type{}[0]);
+}
+
+macro bool is_ref_indexable($Type) @const
+{
+	return $defined(&$Type{}[0]);
+}
+
+macro bool is_intlike($Type) @const
 {
 	$switch ($Type.kindof)
 		$case SIGNED_INT:
@@ -136,7 +146,7 @@ macro bool is_intlike($Type)
 	$endswitch
 }

-macro bool is_underlying_int($Type)
+macro bool is_underlying_int($Type) @const
 {
 	$switch ($Type.kindof)
 		$case SIGNED_INT:
@@ -149,9 +159,9 @@ macro bool is_underlying_int($Type)
 	$endswitch
 }

-macro bool is_float($Type) => $Type.kindof == TypeKind.FLOAT;
+macro bool is_float($Type) @const  => $Type.kindof == TypeKind.FLOAT;

-macro bool is_floatlike($Type)
+macro bool is_floatlike($Type) @const
 {
 	$switch ($Type.kindof)
 		$case FLOAT:
@@ -163,12 +173,12 @@ macro bool is_floatlike($Type)
 	$endswitch
 }

-macro bool is_vector($Type)
+macro bool is_vector($Type) @const
 {
 	return $Type.kindof == TypeKind.VECTOR;
 }

-macro TypeKind inner_kind($Type)
+macro TypeKind inner_kind($Type) @const
 {
 	$if $Type.kindof == TypeKind.DISTINCT:
 		return inner_kind($typefrom($Type.inner));
@@ -177,26 +187,26 @@ macro TypeKind inner_kind($Type)
 	$endif
 }

-macro bool is_same($TypeA, $TypeB)
+macro bool is_same($TypeA, $TypeB) @const
 {
 	return $TypeA.typeid == $TypeB.typeid;
 }

-macro bool @has_same(#a, #b, ...)
+macro bool @has_same(#a, #b, ...) @const
 {
 	var $type_a = @typeid(#a);
 	$if $type_a != @typeid(#b):
 		return false;
 	$endif
 	$for (var $i = 0; $i < $vacount; $i++)
-		$if @typeid($vaexpr($i)) != $type_a:
+		$if @typeid($vaexpr[$i]) != $type_a:
 			return false;
 		$endif
 	$endfor
 	return true;
 }

-macro bool may_load_atomic($Type)
+macro bool may_load_atomic($Type) @const
 {
 	$switch ($Type.kindof)
 	$case SIGNED_INT:
@@ -211,7 +221,7 @@ macro bool may_load_atomic($Type)
 	$endswitch
 }

-macro lower_to_atomic_compatible_type($Type) 
+macro lower_to_atomic_compatible_type($Type) @const
 {
 	$switch ($Type.kindof)
    $case SIGNED_INT:
@@ -237,10 +247,10 @@ macro lower_to_atomic_compatible_type($Type)
  $endswitch
 }

-macro bool is_promotable_to_floatlike($Type) => types::is_floatlike($Type) || types::is_int($Type);
-macro bool is_promotable_to_float($Type) => types::is_float($Type) || types::is_int($Type);
+macro bool is_promotable_to_floatlike($Type) @const  => types::is_floatlike($Type) || types::is_int($Type);
+macro bool is_promotable_to_float($Type) @const  => types::is_float($Type) || types::is_int($Type);

-macro bool is_same_vector_type($Type1, $Type2)
+macro bool is_same_vector_type($Type1, $Type2) @const
 {
 	$if $Type1.kindof != TypeKind.VECTOR:
 		return $Type2.kindof != TypeKind.VECTOR;
@@ -249,7 +259,7 @@ macro bool is_same_vector_type($Type1, $Type2)
 	$endif
 }

-macro bool is_equatable_type($Type)
+macro bool is_equatable_type($Type) @const
 {
 	$if $defined($Type.less) || $defined($Type.compare_to) || $defined($Type.equals):
 		return true;
@@ -261,17 +271,31 @@ macro bool is_equatable_type($Type)
 /**
 * Checks if a type implements the copy protocol.
 **/
-macro bool implements_copy($Type)
+macro bool implements_copy($Type) @const
 {
 	return $defined($Type.copy) && $defined($Type.free);
 }

-macro bool is_equatable_value(value)
+macro bool is_equatable_value(value) @deprecated
 {
 	return is_equatable_type($typeof(value));
 }

-macro bool is_comparable_value(value)
+macro bool @equatable_value(#value) @const
+{
+	return is_equatable_type($typeof(#value));
+}
+
+macro bool @comparable_value(#value) @const
+{
+	$if $defined(#value.less) || $defined(#value.compare_to):
+		return true;
+	$else
+		return $typeof(#value).is_ordered;
+	$endif
+}
+
+macro bool is_comparable_value(value) @deprecated
 {
 	$if $defined(value.less) || $defined(value.compare_to):
 		return true;
--- a/lib/std/core/values.c3
+++ b/lib/std/core/values.c3
@@ -1,21 +1,21 @@
 module std::core::values;

-macro typeid @typeid(#value) @builtin => $typeof(#value).typeid;
-macro TypeKind @typekind(#value) @builtin => $typeof(#value).kindof;
-macro bool @typeis(#value, $Type) @builtin => $typeof(#value).typeid == $Type.typeid;
+macro typeid @typeid(#value) @const @builtin => $typeof(#value).typeid;
+macro TypeKind @typekind(#value) @const @builtin => $typeof(#value).kindof;
+macro bool @typeis(#value, $Type) @const @builtin => $typeof(#value).typeid == $Type.typeid;
 /**
 * Return true if two values have the same type before any conversions.
 **/
-macro bool @is_same_type(#value1, #value2) => $typeof(#value1).typeid == $typeof(#value2).typeid;
-macro bool @is_bool(#value) => types::is_bool($typeof(#value));
-macro bool @is_int(#value) => types::is_int($typeof(#value));
-macro bool @is_floatlike(#value) => types::is_floatlike($typeof(#value));
-macro bool @is_float(#value) => types::is_float($typeof(#value));
-macro bool @is_promotable_to_floatlike(#value) => types::is_promotable_to_floatlike($typeof(#value));
-macro bool @is_promotable_to_float(#value) => types::is_promotable_to_float($typeof(#value));
-macro bool @is_vector(#value) => types::is_vector($typeof(#value));
-macro bool @is_same_vector_type(#value1, #value2) => types::is_same_vector_type($typeof(#value1), $typeof(#value2));
-macro bool @assign_to(#value1, #value2) => $assignable(#value1, $typeof(#value2));
+macro bool @is_same_type(#value1, #value2) @const => $typeof(#value1).typeid == $typeof(#value2).typeid;
+macro bool @is_bool(#value) @const => types::is_bool($typeof(#value));
+macro bool @is_int(#value) @const => types::is_int($typeof(#value));
+macro bool @is_floatlike(#value) @const => types::is_floatlike($typeof(#value));
+macro bool @is_float(#value) @const => types::is_float($typeof(#value));
+macro bool @is_promotable_to_floatlike(#value) @const => types::is_promotable_to_floatlike($typeof(#value));
+macro bool @is_promotable_to_float(#value) @const => types::is_promotable_to_float($typeof(#value));
+macro bool @is_vector(#value) @const => types::is_vector($typeof(#value));
+macro bool @is_same_vector_type(#value1, #value2) @const => types::is_same_vector_type($typeof(#value1), $typeof(#value2));
+macro bool @assign_to(#value1, #value2) @const => $assignable(#value1, $typeof(#value2));

 macro promote_int(x)
 {
@@ -26,5 +26,21 @@ macro promote_int(x)
 	$endif
 }

-macro TypeKind @inner_kind(#value) => types::inner_kind($typeof(#value));
+macro promote_int_same(x, y)
+{
+	$if @is_int(x):
+		$switch
+		$case @is_vector(y) &&& $typeof(y).inner == float.typeid:
+			return (float)x;
+		$case $typeof(y).typeid == float.typeid:
+			return (float)x;
+		$default:
+			return (double)x;
+		$endswitch
+	$else
+		return x;
+	$endif
+}
+
+macro TypeKind @inner_kind(#value) @const => types::inner_kind($typeof(#value));

--- a/lib/std/crypto/rc4.c3
+++ b/lib/std/crypto/rc4.c3
@@ -28,6 +28,18 @@ fn void Rc4.init(&self, char[] key)
 	self.j = 0;
 }

+/**
+ * Run a single pass of en/decryption using a particular key.
+ * @param [in] key
+ * @param [inout] data
+ **/
+fn void crypt(char[] key, char[] data)
+{
+	Rc4 rc4;
+	rc4.init(key);
+	rc4.crypt(data, data);
+}
+
 /**
 * Encrypt or decrypt a sequence of bytes.
 *
--- a/lib/std/encoding/json.c3
+++ b/lib/std/encoding/json.c3
@@ -15,11 +15,29 @@ fault JsonParsingError
 	INVALID_NUMBER,
 }

+fn Object*! parse_string(String s, Allocator allocator = allocator::heap())
+{
+	return parse(ByteReader{}.init(s), allocator);
+}
+
+fn Object*! temp_parse_string(String s)
+{
+	return parse(ByteReader{}.init(s), allocator::temp());
+}
+
 fn Object*! parse(InStream s, Allocator allocator = allocator::heap())
 {
 	JsonContext context = { .last_string = dstring::new_with_capacity(64, allocator), .stream = s, .allocator = allocator };
 	defer context.last_string.free();
-	return parse_any(&context);
+	@pool(allocator)
+	{
+		return parse_any(&context);
+	};
+}
+
+fn Object*! temp_parse(InStream s)
+{
+	return parse(s, allocator::temp());
 }

 // -- Implementation follows --
--- a/lib/std/io/formatter.c3
+++ b/lib/std/io/formatter.c3
@@ -85,6 +85,7 @@ fn usz! Formatter.print_with_function(&self, Printable arg)
 			self.width = old_width;
 			self.prec = old_prec;
 		}
+		if (!arg) return self.out_substr("(null)");
 		return arg.to_format(self);
 	}
 	if (&arg.to_new_string)
@@ -98,6 +99,7 @@ fn usz! Formatter.print_with_function(&self, Printable arg)
 			self.width = old_width;
 			self.prec = old_prec;
 		}
+		if (!arg) return self.out_substr("(null)");
 		@stack_mem(1024; Allocator mem)
 		{
 			return self.out_substr(arg.to_new_string(mem));
@@ -150,17 +152,8 @@ fn usz! Formatter.out_str(&self, any arg) @private
 		default:
 	}
 	usz! n = self.print_with_function((Printable)arg);
-	if (catch err = n)
-	{
-		case SearchResult.MISSING:
-			break;
-		default:
-			return err?;
-	}
-	else
-	{
-		return n;
-	}
+	if (try n) return n;
+	if (@catch(n) != SearchResult.MISSING) n!;
 	switch (arg.type.kindof)
 	{
 		case ENUM:
@@ -178,14 +171,23 @@ fn usz! Formatter.out_str(&self, any arg) @private
 		case DISTINCT:
 			if (arg.type == ZString.typeid)
 			{
-				return self.out_substr(((ZString*)arg).str_view());
+				return self.out_substr(*(ZString*)arg ? ((ZString*)arg).str_view() : "(null)");
 			}
 			if (arg.type == DString.typeid)
 			{
-				return self.out_substr(((DString*)arg).str_view());
+				return self.out_substr(*(DString*)arg ? ((DString*)arg).str_view() : "(null)");
 			}
 			return self.out_str(arg.as_inner());
 		case POINTER:
+			typeid inner = arg.type.inner;
+			void** pointer = arg.ptr;
+			if (arg.type.inner != void.typeid)
+			{
+				any deref = any_make(*pointer, inner);
+				n = self.print_with_function((Printable)deref);
+				if (try n) return n;
+				if (@catch(n) != SearchResult.MISSING) n!;
+			}
 			PrintFlags flags = self.flags;
 			uint width = self.width;
 			defer
@@ -193,8 +195,8 @@ fn usz! Formatter.out_str(&self, any arg) @private
 				self.flags = flags;
 				self.width = width;
 			}
-			self.flags = {};
 			self.width = 0;
+			self.out_substr("0x")!;
 			return self.ntoa_any(arg, 16);
 		case ARRAY:
 			// this is SomeType[*] so grab the "SomeType"
--- a/lib/std/io/formatter_private.c3
+++ b/lib/std/io/formatter_private.c3
@@ -628,15 +628,15 @@ fn usz! Formatter.out_reverse(&self, char[] buf) @private
 	usz buffer_start_idx = self.idx;
 	usz len = buf.len;
 	// pad spaces up to given width
-	if (!self.flags.zeropad)
+	if (!self.flags.zeropad && !self.flags.left)
 	{
-		n += self.adjust(len)!;
+    	n += self.pad(' ', self.width, len)!;
 	}
 	// reverse string
 	while (len) n += self.out(buf[--len])!;

 	// append pad spaces up to given width
-	n += self.adjust(self.idx - buffer_start_idx)!;
+	n += self.adjust(n)!;
 	return n;
 }

--- a/lib/std/io/io.c3
+++ b/lib/std/io/io.c3
@@ -46,12 +46,18 @@ fault IoError


 /**
- * @param stream
- * @require @is_instream(stream)
+ * Read from a stream (default is stdin) to the next "\n"
+ * or to the end of the stream, whatever comes first.
+ * "\r" will be filtered from the String.
+ *
+ * @param stream `The stream to read from.`
+ * @require @is_instream(stream) `The stream must implement InStream.`
+ * @param [inout] allocator `the allocator to use.`
+ * @return `The string containing the data read.`
 **/
 macro String! readline(stream = io::stdin(), Allocator allocator = allocator::heap())
 {
-	bool $is_stream = @typeid(stream) == InStream.typeid;
+	bool $is_stream = @typeis(stream, InStream);
 	$if $is_stream:
 		$typeof(&stream.read_byte) func = &stream.read_byte;
 		char val = func((void*)stream)!;
@@ -84,30 +90,51 @@ macro String! readline(stream = io::stdin(), Allocator allocator = allocator::he
    };
 }

-macro String! treadline(stream = io::stdin()) => readline(stream, allocator::temp()) @inline;
+/**
+ * Reads a string, see `readline`, except the it is allocated
+ * on the temporary allocator and does not need to be freed.
+ *
+ * @param stream `The stream to read from.`
+ * @require @is_instream(stream) `The stream must implement InStream.`
+ * @return `The temporary string containing the data read.`
+ **/
+macro String! treadline(stream = io::stdin())
+{
+	return readline(stream, allocator::temp()) @inline;
+}

 /**
- * @require @is_outstream(out) "The output must implement OutStream"
+ * Print a value to a stream.
+ *
+ * @param out `the stream to print to`
+ * @param x `the value to print`
+ * @require @is_outstream(out) `The output must implement OutStream.`
+ * @return `the number of bytes printed.`
 */
 macro usz! fprint(out, x)
 {
 	var $Type = $typeof(x);
 	$switch ($Type)
-	$case String:
-		return out.write(x);
-	$case ZString:
-		return out.write(x.str_view());
-	$case DString:
-		return out.write(x.str_view());
-	$default:
-		$if $assignable(x, String):
-			return out.write((String)x);
-		$else
-			return fprintf(out, "%s", x);
-		$endif
+		$case String: return out.write(x);
+		$case ZString: return out.write(x.str_view());
+		$case DString: return out.write(x.str_view());
+		$default:
+			$if $assignable(x, String):
+				return out.write((String)x);
+			$else
+				return fprintf(out, "%s", x);
+			$endif
 	$endswitch
 }

+/**
+ * Prints using a 'printf'-style formatting string.
+ * See `printf` for details on formatting.
+ *
+ * @param [inout] out `The OutStream to print to`
+ * @param [in] format `The printf-style format string`
+ * @return `the number of characters printed`
+ **/
 fn usz! fprintf(OutStream out, String format, args...)
 {
 	Formatter formatter;
@@ -115,6 +142,14 @@ fn usz! fprintf(OutStream out, String format, args...)
 	return formatter.vprintf(format, args);
 }

+/**
+ * Prints using a 'printf'-style formatting string,
+ * appending '\n' at the end. See `printf`.
+ *
+ * @param [inout] out `The OutStream to print to`
+ * @param [in] format `The printf-style format string`
+ * @return `the number of characters printed`
+ **/
 fn usz! fprintfn(OutStream out, String format, args...) @maydiscard
 {
 	Formatter formatter;
@@ -141,21 +176,37 @@ macro usz! fprintn(out, x = "")
 	return len + 1;
 }

+/**
+ * Print any value to stdout.
+ **/
 macro void print(x)
 {
 	(void)fprint(io::stdout(), x);
 }

+/**
+ * Print any value to stdout, appending an '\n’ after.
+ *
+ * @param x "The value to print"
+ **/
 macro void printn(x = "")
 {
 	(void)fprintn(io::stdout(), x);
 }

+/**
+ * Print any value to stderr.
+ **/
 macro void eprint(x)
 {
 	(void)fprint(io::stderr(), x);
 }

+/**
+ * Print any value to stderr, appending an '\n’ after.
+ *
+ * @param x "The value to print"
+ **/
 macro void eprintn(x)
 {
 	(void)fprintn(io::stderr(), x);
@@ -173,6 +224,20 @@ fn void! out_putchar_fn(void* data @unused, char c) @private
 	libc::putchar(c);
 }

+/**
+ * Prints using a 'printf'-style formatting string.
+ * To print integer numbers, use "%d" or "%x"/"%X,
+ * the latter gives the hexadecimal representation.
+ *
+ * All types can be printed using "%s" which gives
+ * the default representation of the value.
+ *
+ * To create a custom output for a type, implement
+ * the Printable interface.
+ *
+ * @param [in] format `The printf-style format string`
+ * @return `the number of characters printed`
+ **/
 fn usz! printf(String format, args...) @maydiscard
 {
 	Formatter formatter;
@@ -180,6 +245,13 @@ fn usz! printf(String format, args...) @maydiscard
 	return formatter.vprintf(format, args);
 }

+/**
+ * Prints using a 'printf'-style formatting string,
+ * appending '\n' at the end. See `printf`.
+ *
+ * @param [in] format `The printf-style format string`
+ * @return `the number of characters printed`
+ **/
 fn usz! printfn(String format, args...) @maydiscard
 {
 	Formatter formatter;
@@ -190,6 +262,13 @@ fn usz! printfn(String format, args...) @maydiscard
 	return len + 1;
 }

+/**
+ * Prints using a 'printf'-style formatting string
+ * to stderr.
+ *
+ * @param [in] format `The printf-style format string`
+ * @return `the number of characters printed`
+ **/
 fn usz! eprintf(String format, args...) @maydiscard
 {
 	Formatter formatter;
@@ -199,6 +278,13 @@ fn usz! eprintf(String format, args...) @maydiscard
 }


+/**
+ * Prints using a 'printf'-style formatting string,
+ * to stderr appending '\n' at the end. See `printf`.
+ *
+ * @param [in] format `The printf-style format string`
+ * @return `the number of characters printed`
+ **/
 fn usz! eprintfn(String format, args...) @maydiscard
 {
 	Formatter formatter;
@@ -210,6 +296,14 @@ fn usz! eprintfn(String format, args...) @maydiscard
 	return len;
 }

+/**
+ * Prints using a 'printf'-style formatting string,
+ * to a string buffer. See `printf`.
+ *
+ * @param [inout] buffer `The buffer to print to`
+ * @param [in] format `The printf-style format string`
+ * @return `a slice formed from the "buffer" with the resulting length.`
+ **/
 fn char[]! bprintf(char[] buffer, String format, args...) @maydiscard
 {
 	Formatter formatter;
@@ -219,6 +313,7 @@ fn char[]! bprintf(char[] buffer, String format, args...) @maydiscard
 	return buffer[:data.written];
 }

+// Used to print to a buffer.
 fn void! out_buffer_fn(void *data, char c) @private
 {
 	BufferData *buffer_data = data;
@@ -226,22 +321,30 @@ fn void! out_buffer_fn(void *data, char c) @private
 	buffer_data.buffer[buffer_data.written++] = c;
 }

-
+// Used for buffer printing
 struct BufferData @private
 {
 	char[] buffer;
 	usz written;
 }

-
+// Only available with LIBC
 module std::io @if (env::LIBC);
 import libc;

+/**
+ * Libc `putchar`, prints a single character to stdout.
+ **/
 fn void putchar(char c) @inline
 {
 	libc::putchar(c);
 }

+/**
+ * Get standard out.
+ *
+ * @return `stdout as a File`
+ **/
 fn File* stdout()
 {
 	static File file;
@@ -249,6 +352,11 @@ fn File* stdout()
 	return &file;
 }

+/**
+ * Get standard err.
+ *
+ * @return `stderr as a File`
+ **/
 fn File* stderr()
 {
 	static File file;
@@ -256,6 +364,11 @@ fn File* stderr()
 	return &file;
 }

+/**
+ * Get standard in.
+ *
+ * @return `stdin as a File`
+ **/
 fn File* stdin()
 {
 	static File file;
@@ -271,7 +384,7 @@ File stderr_file;

 fn void putchar(char c) @inline
 {
-	(void)stdout_file.putc(c);
+	(void)stdout_file.write_byte(c);
 }

 fn File* stdout()
--- a/lib/std/io/os/fileinfo.c3
+++ b/lib/std/io/os/fileinfo.c3
@@ -95,7 +95,7 @@ fn bool native_is_file(String path)
 		$case env::DARWIN:
 		$case env::LINUX:
 			Stat stat;
-			return @ok(native_stat(&stat, path)) && stat.st_mode & libc::S_IFREG;
+			return @ok(native_stat(&stat, path)) && libc_S_ISTYPE(stat.st_mode, libc::S_IFREG);
 		$default:
 			File! f = file::open(path, "r");
 			defer (void)f.close();
@@ -107,7 +107,7 @@ fn bool native_is_dir(String path)
 {
 	$if env::DARWIN || env::LINUX:
 		Stat stat;
-		return @ok(native_stat(&stat, path)) && stat.st_mode & libc::S_IFDIR;
+		return @ok(native_stat(&stat, path)) && libc_S_ISTYPE(stat.st_mode, libc::S_IFDIR);
 	$else
 		return native_file_or_dir_exists(path) && !native_is_file(path);
 	$endif
--- a/lib/std/io/os/rmtree.c3
+++ b/lib/std/io/os/rmtree.c3
@@ -16,7 +16,7 @@ fn void! native_rmtree(Path dir)
 		{
 			String name = ((ZString)&entry.name).str_view();
 			if (!name || name == "." || name == "..") continue;
-			Path new_path = dir.tappend(name)!;
+			Path new_path = dir.temp_append(name)!;
 			if (entry.d_type == posix::DT_DIR)
 			{
 				native_rmtree(new_path)!;
@@ -49,7 +49,7 @@ fn void! native_rmtree(Path path)
 		{
 			String filename = string::new_from_wstring((WString)&find_data.cFileName, allocator::temp())!;
 			if (filename == "." || filename == "..") continue;
-			Path file_path = path.tappend(filename)!;
+			Path file_path = path.temp_append(filename)!;
 			if (find_data.dwFileAttributes & win32::FILE_ATTRIBUTE_DIRECTORY)
 			{
 				native_rmtree(file_path)!;
--- a/lib/std/io/os/temp_directory.c3
+++ b/lib/std/io/os/temp_directory.c3
@@ -24,6 +24,7 @@ fn Path! native_temp_directory(Allocator allocator = allocator::heap()) @if(env:
 }

 module std::io::os @if(env::NO_LIBC);
+import std::io::path;

 macro Path! native_temp_directory(Allocator allocator = allocator::heap())
 {
--- a/lib/std/io/path.c3
+++ b/lib/std/io/path.c3
@@ -15,7 +15,9 @@ fault PathResult
 	NO_PARENT,
 }

-struct Path (Printable)
+def Path = PathImp;
+
+struct PathImp (Printable)
 {
 	String path_string;
 	PathEnv env;
@@ -27,7 +29,15 @@ enum PathEnv
 	POSIX
 }

-fn Path! getcwd(Allocator allocator = allocator::heap())
+fn Path! new_cwd(Allocator allocator = allocator::heap())
+{
+	@pool(allocator)
+	{
+		return new(os::getcwd(allocator::temp()), allocator);
+	};
+}
+
+fn Path! getcwd(Allocator allocator = allocator::heap()) @deprecated("Use new_cwd()")
 {
 	@pool(allocator)
 	{
@@ -39,7 +49,8 @@ fn bool is_dir(Path path) => os::native_is_dir(path.str_view());
 fn bool is_file(Path path) => os::native_is_file(path.str_view());
 fn usz! file_size(Path path) => os::native_file_size(path.str_view());
 fn bool exists(Path path) => os::native_file_or_dir_exists(path.str_view());
-fn Path! tgetcwd() => getcwd(allocator::temp()) @inline;
+fn Path! temp_cwd() => new_cwd(allocator::temp()) @inline;
+fn Path! tgetcwd() @deprecated("Use temp_cwd()") => new_cwd(allocator::temp()) @inline;
 fn void! chdir(Path path) => os::native_chdir(path) @inline;
 fn Path! temp_directory(Allocator allocator = allocator::heap()) => os::native_temp_directory(allocator);
 fn void! delete(Path path) => os::native_remove(path.str_view()) @inline;
@@ -59,7 +70,17 @@ macro bool is_win32_separator(char c)
 	return c == '/' || c == '\\';
 }

-fn PathList! ls(Path dir, bool no_dirs = false, bool no_symlinks = false, String mask = "", Allocator allocator = allocator::heap())
+fn PathList! ls(Path dir, bool no_dirs = false, bool no_symlinks = false, String mask = "", Allocator allocator = allocator::heap()) @deprecated("use new_ls")
+{
+	return new_ls(dir, no_dirs, no_symlinks, mask, allocator);
+
+}
+fn PathList! temp_ls(Path dir, bool no_dirs = false, bool no_symlinks = false, String mask = "")
+{
+	return new_ls(dir, no_dirs, no_symlinks, mask, allocator::temp()) @inline;
+}
+
+fn PathList! new_ls(Path dir, bool no_dirs = false, bool no_symlinks = false, String mask = "", Allocator allocator = allocator::heap())
 {
 	$if $defined(os::native_ls):
 		return os::native_ls(dir, no_dirs, no_symlinks, mask, allocator);
@@ -139,12 +160,17 @@ fn bool Path.equals(self, Path p2)
 	return self.env == p2.env && self.path_string == p2.path_string;
 }

+fn Path! Path.append(self, String filename, Allocator allocator = allocator::heap()) @deprecated("Use path.new_append(...)")
+{
+	return self.new_append(filename, allocator) @inline;
+}
+
 /**
 * Append the string to the current path.
 *
 * @param [in] filename
 **/
-fn Path! Path.append(self, String filename, Allocator allocator = allocator::heap())
+fn Path! Path.new_append(self, String filename, Allocator allocator = allocator::heap())
 {
 	if (!self.path_string.len) return new(filename, allocator, self.env)!;
 	assert(!is_separator(self.path_string[^1], self.env));
@@ -159,7 +185,9 @@ fn Path! Path.append(self, String filename, Allocator allocator = allocator::hea
 	};
 }

-fn Path! Path.tappend(self, String filename) => self.append(filename, allocator::temp());
+fn Path! Path.temp_append(self, String filename) => self.new_append(filename, allocator::temp());
+
+fn Path! Path.tappend(self, String filename) @deprecated("Use path.temp_append(...)") => self.new_append(filename, allocator::temp());

 fn usz Path.start_of_base_name(self) @local
 {
@@ -193,10 +221,15 @@ fn bool! Path.is_absolute(self)
 	return path_start < path_str.len && is_separator(path_str[path_start], self.env);
 }

+fn Path! Path.absolute(self, Allocator allocator = allocator::heap()) @deprecated("Use path.new_absolute()")
+{
+	return self.new_absolute(allocator) @inline;
+}
+
 /**
 * @require self.env == DEFAULT_PATH_ENV : "This method is only available on native paths"
 **/
-fn Path! Path.absolute(self, Allocator allocator = allocator::heap())
+fn Path! Path.new_absolute(self, Allocator allocator = allocator::heap())
 {
 	String path_str = self.str_view();
 	if (!path_str.len) return PathResult.INVALID_PATH?;
@@ -220,7 +253,7 @@ fn Path! Path.absolute(self, Allocator allocator = allocator::heap())
 		};
 	$else
 		String cwd = os::getcwd(allocator::temp())!;
-		return Path { cwd, self.env }.append(path_str, allocator)!;
+		return Path { cwd, self.env }.new_append(path_str, allocator)!;
 	$endif
 }

@@ -250,6 +283,22 @@ fn String Path.dirname(self)
 	return path_str[:basename_start - 1];
 }

+/**
+ * Test if the path has the given extension, so given the path /foo/bar.c3
+ * this would be true matching the extension "c3"
+ *
+ * @param [in] extension `The extension name (not including the leading '.')`
+ * @require extension.len > 0 : `The extension cannot be empty`
+ * @return `true if the extension matches`
+ **/
+fn bool Path.has_extension(self, String extension)
+{
+	String basename = self.basename();
+	if (basename.len <= extension.len) return false;
+	if (basename[^extension.len + 1] != '.') return false;
+	return basename[^extension.len..] == extension;
+}
+
 fn String! Path.extension(self)
 {
 	String basename = self.basename();
@@ -470,12 +519,12 @@ fn bool! Path.walk(self, PathWalker w, void* data)
 	const PATH_MAX = 512;
 	@stack_mem(PATH_MAX; Allocator allocator)
 	{
-		Path abs = self.absolute(allocator)!;
-		PathList files = ls(abs, .allocator = allocator)!;
+		Path abs = self.new_absolute(allocator)!;
+		PathList files = new_ls(abs, .allocator = allocator)!;
 		foreach (f : files)
 		{
 			if (f.str_view() == "." || f.str_view() == "..") continue;
-			f = abs.append(f.str_view(), allocator)!;
+			f = abs.new_append(f.str_view(), allocator)!;
 			bool is_directory = is_dir(f);
 			if (w(f, is_directory, data)!) return true;
 			if (is_directory && f.walk(w, data)!) return true;
--- a/lib/std/io/stream.c3
+++ b/lib/std/io/stream.c3
@@ -141,15 +141,9 @@ fn usz! copy_to(InStream in, OutStream dst, char[] buffer = {})
 	if (&dst.read_to) return dst.read_to(in);
 	$switch (env::MEMORY_ENV)
 		$case NORMAL:
-			@pool()
-			{
-				return copy_through_buffer(in, dst, mem::temp_alloc_array(char, 4096));
-			};
+			return copy_through_buffer(in, dst, &&char[4096]{});
 		$case SMALL:
-			@pool()
-			{
-				return copy_through_buffer(in, dst, mem::temp_alloc_array(char, 1024));
-			};
+			return copy_through_buffer(in, dst, &&char[1024]{});
 		$case TINY:
 		$case NONE:
 			return copy_through_buffer(in, dst, &&(char[256]{}));
--- a/lib/std/io/stream/bytewriter.c3
+++ b/lib/std/io/stream/bytewriter.c3
@@ -11,7 +11,7 @@ struct ByteWriter (OutStream)
 /**
 * @param [&inout] self
 * @param [&inout] allocator
- * @require self.bytes.len == 0 "Init may not run on on already initialized data"
+ * @require self.bytes.len == 0 "Init may not run on already initialized data"
 * @ensure (bool)allocator, self.index == 0
 **/
 fn ByteWriter* ByteWriter.new_init(&self, Allocator allocator = allocator::heap())
@@ -22,7 +22,7 @@ fn ByteWriter* ByteWriter.new_init(&self, Allocator allocator = allocator::heap(

 /**
 * @param [&inout] self
- * @require self.bytes.len == 0 "Init may not run on on already initialized data"
+ * @require self.bytes.len == 0 "Init may not run on already initialized data"
 * @ensure self.index == 0
 **/
 fn ByteWriter* ByteWriter.temp_init(&self)
--- a/lib/std/libc/libc.c3
+++ b/lib/std/libc/libc.c3
@@ -183,8 +183,8 @@ extern fn isz write(Fd fd, void* buffer, usz count) @if(!env::WIN32);

 extern fn CFile fmemopen(void* ptr, usz size, ZString mode);
 extern fn isz getline(char** linep, usz* linecapp, CFile stream);
-extern fn int timespec_get(TimeSpec* ts, int base);
-extern fn int nanosleep(TimeSpec* req, TimeSpec* remaining);
+extern fn CInt timespec_get(TimeSpec* ts, CInt base);
+extern fn CInt nanosleep(TimeSpec* req, TimeSpec* remaining);
 extern fn ZString ctime(Time_t *timer);
 extern fn Time_t time(Time_t *timer);

@@ -360,6 +360,7 @@ const int EOF = -1;
 const int FOPEN_MAX = 20;
 const int FILENAME_MAX = 1024;

+macro bool libc_S_ISTYPE(value, mask) @builtin => (value & S_IFMT) == mask;
 const S_IFMT   = 0o170000; // type of file mask
 const S_IFIFO  = 0o010000; // named pipe (fifo)
 const S_IFCHR  = 0o020000; // character special
--- a/lib/std/libc/os/posix.c3
+++ b/lib/std/libc/os/posix.c3
@@ -1,5 +1,7 @@
 module libc @if(env::POSIX);

+extern fn isz recv(Fd socket, void *buffer, usz length, CInt flags);
+extern fn isz send(Fd socket, void *buffer, usz length, CInt flags);

 extern fn void* dlopen(ZString path, int flags);
 extern fn CInt dlclose(void*);
@@ -53,3 +55,139 @@ struct Stack_t

 extern fn CInt sigaltstack(Stack_t* ss, Stack_t* old_ss);
 extern fn CInt sigaction(CInt signum, Sigaction *action, Sigaction *oldaction);
+
+module libc::termios @if(env::LIBC &&& env::POSIX);
+
+distinct Cc = char;
+distinct Speed = CUInt;
+distinct Tcflags = CUInt;
+
+const Tcflags TCOOFF = 0;
+const Tcflags TCOON = 1;
+const Tcflags TCIOFF = 2;
+const Tcflags TCION = 3;
+const Tcflags TCIFLUSH = 0;
+const Tcflags TCOFLUSH = 1;
+const Tcflags TCIOFLUSH = 2;
+const Tcflags TCSANOW = 0;
+const Tcflags TCSADRAIN = 1;
+const Tcflags TCSAFLUSH = 2;
+const Speed B0 = 0000000;
+const Speed B50 = 0000001;
+const Speed B75 = 0000002;
+const Speed B110 = 0000003;
+const Speed B134 = 0000004;
+const Speed B150 = 0000005;
+const Speed B200 = 0000006;
+const Speed B300 = 0000007;
+const Speed B600 = 0000010;
+const Speed B1200 = 0000011;
+const Speed B1800 = 0000012;
+const Speed B2400 = 0000013;
+const Speed B4800 = 0000014;
+const Speed B9600 = 0000015;
+const Speed B19200 = 0000016;
+const Speed B38400 = 0000017;
+const Speed B57600 = 0010001;
+const Speed B115200 = 0010002;
+const Speed B230400 = 0010003;
+const Speed B460800 = 0010004;
+const Speed B500000 = 0010005;
+const Speed B576000 = 0010006;
+const Speed B921600 = 0010007;
+const Speed B1000000 = 0010010;
+const Speed B1152000 = 0010011;
+const Speed B1500000 = 0010012;
+const Speed B2000000 = 0010013;
+const Speed B2500000 = 0010014;
+const Speed B3000000 = 0010015;
+const Speed B3500000 = 0010016;
+const Speed B4000000 = 0010017;
+const Speed MAX_BAUD = B4000000;
+const CInt VINTR = 0;
+const CInt VQUIT = 1;
+const CInt VERASE = 2;
+const CInt VKILL = 3;
+const CInt VEOF = 4;
+const CInt VTIME = 5;
+const CInt VMIN = 6;
+const CInt VSWTC = 7;
+const CInt VSTART = 8;
+const CInt VSTOP = 9;
+const CInt VSUSP = 10;
+const CInt VEOL = 11;
+const CInt VREPRINT = 12;
+const CInt VDISCARD = 13;
+const CInt VWERASE = 14;
+const CInt VLNEXT = 15;
+const CInt VEOL2 = 16;
+const CInt ISIG = 0000001;
+const CInt ICANON = 0000002;
+const CInt ECHO = 0000010;
+const CInt ECHOE = 0000020;
+const CInt ECHOK = 0000040;
+const CInt ECHONL = 0000100;
+const CInt NOFLSH = 0000200;
+const CInt TOSTOP = 0000400;
+const CInt IEXTEN = 0100000;
+const CInt CSIZE = 0000060;
+const CInt CS5 = 0000000;
+const CInt CS6 = 0000020;
+const CInt CS7 = 0000040;
+const CInt CS8 = 0000060;
+const CInt CSTOPB = 0000100;
+const CInt CREAD = 0000200;
+const CInt PARENB = 0000400;
+const CInt PARODD = 0001000;
+const CInt HUPCL = 0002000;
+const CInt CLOCAL = 0004000;
+const CInt OPOST = 0000001;
+const CInt OLCUC = 0000002;
+const CInt ONLCR = 0000004;
+const CInt OCRNL = 0000010;
+const CInt ONOCR = 0000020;
+const CInt ONLRET = 0000040;
+const CInt OFILL = 0000100;
+const CInt OFDEL = 0000200;
+const CInt VTDLY = 0040000;
+const CInt VT0 = 0000000;
+const CInt VT1 = 0040000;
+const CInt IGNBRK = 0000001;
+const CInt BRKINT = 0000002;
+const CInt IGNPAR = 0000004;
+const CInt PARMRK = 0000010;
+const CInt INPCK = 0000020;
+const CInt ISTRIP = 0000040;
+const CInt INLCR = 0000100;
+const CInt IGNCR = 0000200;
+const CInt ICRNL = 0000400;
+const CInt IUCLC = 0001000;
+const CInt IXON = 0002000;
+const CInt IXANY = 0004000;
+const CInt IXOFF = 0010000;
+const CInt IMAXBEL = 0020000;
+const CInt IUTF8 = 0040000;
+
+extern fn CInt tcgetattr(Fd fd, Termios* self);
+extern fn CInt tcsetattr(Fd fd, CInt optional_actions, Termios* self);
+extern fn CInt tcsendbreak(Fd fd, CInt duration);
+extern fn CInt tcdrain(Fd fd);
+extern fn CInt tcflush(Fd fd, CInt queue_selector);
+extern fn CInt tcflow(Fd fd, CInt action);
+extern fn Speed cfgetospeed(Termios* self);
+extern fn Speed cfgetispeed(Termios* self);
+extern fn CInt cfsetospeed(Termios* self, Speed speed);
+extern fn CInt cfsetispeed(Termios* self, Speed speed);
+
+const CInt NCCS = 32;
+struct Termios {
+        Tcflags c_iflag;
+        Tcflags c_oflag;
+        Tcflags c_cflag;
+        Tcflags c_lflag;
+        Cc c_line;
+        Cc[NCCS] c_cc;
+        Speed c_ispeed;
+        Speed c_ospeed;
+} 
+
--- a/lib/std/libc/os/win32.c3
+++ b/lib/std/libc/os/win32.c3
@@ -1,5 +1,5 @@
 module libc @if(env::WIN32);
-
+import std::os::win32;

 extern fn CFile __acrt_iob_func(CInt c);
 extern fn CInt _close(Fd fd); def close = _close;
@@ -15,11 +15,13 @@ extern fn Time_t _mkgmtime64(Tm* timeptr); def timegm = _mkgmtime64;
 extern fn Time_t _mktime64(Tm *timeptr); def mktime = _mktime64;
 extern fn usz _msize(void* ptr);
 extern fn CInt _read(Fd fd, void* buffer, CUInt buffer_size);
-extern fn CInt _setjmp(void* frameptr, JmpBuf* buffer) @if(env::WIN32);
+extern fn CInt _setjmp(JmpBuf* buffer, void* frameptr);
 extern fn CFile _wfopen(WString, WString);
 extern fn CFile _wfreopen(WString, WString, CFile);
 extern fn CInt _write(Fd fd, void* buffer, CUInt count);
 extern fn CInt _wremove(WString);
+extern fn int recv(Win32_SOCKET s, void* buf, int len, int flags);
+extern fn int send(Win32_SOCKET s, void* buf, int len, int flags);

 struct SystemInfo
 {
@@ -45,7 +47,7 @@ extern fn CInt get_system_info(SystemInfo*) @extern("GetSystemInfo");

 // Aliases to simplify libc use
 macro Tm* localtime_r(Time_t* timer, Tm* buf) => _localtime64_s(buf, timer);
-macro CInt setjmp(JmpBuf* buffer) => _setjmp($$frameaddress(0), buffer);
+macro CInt setjmp(JmpBuf* buffer) => _setjmp(buffer, null);
 macro Tm* gmtime_r(Time_t* timer, Tm* buf) => _gmtime64_s(buf, timer);
 macro isz read(Fd fd, void* buffer, usz buffer_size) => _read(fd, buffer, (CUInt)buffer_size);
 macro isz write(Fd fd, void* buffer, usz count) => _write(fd, buffer, (CUInt)count);
--- a/lib/std/libc/termios.c3
+++ b/lib/std/libc/termios.c3
@@ -0,0 +1,122 @@
+module libc::termios @if(env::LIBC &&& env::POSIX);
+
+fn int sendBreak(Fd fd, int duration) => tcsendbreak(fd, duration);
+fn int drain(Fd fd) => tcdrain(fd);
+fn int flush(Fd fd, int queue_selector) => tcflush(fd, queue_selector);
+fn int flow(Fd fd, int action) => tcflow(fd, action);
+fn Speed Termios.getOSpeed(Termios* self) => cfgetospeed(self);
+fn Speed Termios.getISpeed(Termios* self) => cfgetispeed(self);
+fn int Termios.setOSpeed(Termios* self, Speed speed) => cfsetospeed(self, speed);
+fn int Termios.setISpeed(Termios* self, Speed speed) => cfsetispeed(self, speed);
+fn int Termios.getAttr(Termios* self, Fd fd) => tcgetattr(fd, self);
+fn int Termios.setAttr(Termios* self, Fd fd, int optional_actions) => tcsetattr(fd, optional_actions, self);
+
+module libc::termios @if(!env::LIBC ||| !env::POSIX);
+
+distinct Cc = char;
+distinct Speed = CUInt;
+distinct Tcflags = CUInt;
+struct Termios {
+        void* dummy;
+}
+
+fn CInt tcgetattr(Fd fd, Termios* self)
+{
+        unreachable("tcgetattr unavailable");
+}
+
+fn CInt tcsetattr(Fd fd, CInt optional_actions, Termios* self)
+{
+        unreachable("tcsetattr unavailable");
+}
+
+fn CInt tcsendbreak(Fd fd, CInt duration)
+{
+        unreachable("tcsendbreak unavailable");
+}
+
+fn CInt tcdrain(Fd fd)
+{
+        unreachable("tcdrain unavailable");
+}
+
+fn CInt tcflush(Fd fd, CInt queue_selector)
+{
+        unreachable("tcflush unavailable");
+}
+
+fn CInt tcflow(Fd fd, CInt action)
+{
+        unreachable("tcflow unavailable");
+}
+
+fn Speed cfgetospeed(Termios* self)
+{
+        unreachable("cfgetospeed unavailable");
+}
+
+fn Speed cfgetispeed(Termios* self)
+{
+        unreachable("cfgetispeed unavailable");
+}
+
+fn CInt cfsetospeed(Termios* self, Speed speed)
+{
+        unreachable("cfsetospeed unavailable");
+}
+
+fn CInt cfsetispeed(Termios* self, Speed speed)
+{
+        unreachable("cfsetispeed unavailable");
+}
+
+fn int sendBreak(Fd fd, int duration)
+{
+        unreachable("sendBreak unavailable");
+}
+
+fn int drain(Fd fd)
+{
+        unreachable("drain unavailable");
+}
+
+fn int flush(Fd fd, int queue_selector)
+{
+        unreachable("flush unavailable");
+}
+
+fn int flow(Fd fd, int action)
+{
+        unreachable("flow unavailable");
+}
+
+fn Speed Termios.getOSpeed(Termios* self)
+{
+        unreachable("Termios.getOSpeed unavailable");
+}
+
+fn Speed Termios.getISpeed(Termios* self)
+{
+        unreachable("Termios.getISpeed unavailable");
+}
+
+fn int Termios.setOSpeed(Termios* self, Speed speed)
+{
+        unreachable("Termios.setOSpeed unavailable");
+}
+
+fn int Termios.setISpeed(Termios* self, Speed speed)
+{
+        unreachable("Termios.setISpeed unavailable");
+}
+
+fn int Termios.getAttr(Termios* self, Fd fd)
+{
+        unreachable("Termios.getAttr unavailable");
+}
+
+fn int Termios.setAttr(Termios* self, Fd fd, int optional_actions)
+{
+        unreachable("Termios.setAttr unavailable");
+}
+
--- a/lib/std/math/math.c3
+++ b/lib/std/math/math.c3
@@ -159,7 +159,7 @@ macro atan2(x, y)

 /**
 * @require values::@is_int(x) || values::@is_float(x) "Expected an integer or floating point value"
- * @require $and(@typekind(y) == ARRAY || @typekind(y) == VECTOR, y.len == 2)
+ * @require (@typekind(y) == ARRAY || @typekind(y) == VECTOR) &&& y.len == 2
 * @require $assignable(x, $typeof(y[0]))
 **/
 macro sincos(x, y)
@@ -266,7 +266,7 @@ macro clamp(x, lower, upper) => $$max(($typeof(x))lower, $$min(x, ($typeof(x))up
 * @require values::@is_promotable_to_floatlike(mag) `The input must be a number value or float vector`
 * @require values::@assign_to(sgn, values::promote_int(mag))
 **/
-macro copysign(mag, sgn) => $$copysign(values::promote_int(mag), ($typeof(values::promote_int(mag)))sgn);
+macro copysign(mag, sgn) => $$copysign(values::promote_int_same(mag, sgn), ($typeof(values::promote_int_same(mag, sgn)))sgn);

 /**
 * @require values::@is_promotable_to_floatlike(x) `The input must be a number value or float vector`
@@ -339,7 +339,10 @@ macro ln(x) => $$log(values::promote_int(x));
 * @require values::@is_promotable_to_floatlike(x) `The input must be a number or a float vector`
 * @require values::@is_promotable_to_floatlike(base) `The base must be a number or a float vector`
 **/
-macro log(x, base) => $$log(values::promote_int(x)) / $$log(values::promote_int(base));
+macro log(x, base)
+{
+	return $$log(values::promote_int_same(x, base)) / $$log(values::promote_int_same(base, x));
+}

 /**
 * @require values::@is_promotable_to_floatlike(x) `The input must be a number or a float vector`
@@ -362,7 +365,7 @@ macro max(x, y, ...)
 	$else
 		var m = $$max(x, y);
 		$for (var $i = 0; $i < $vacount; $i++)
-			m = $$max(m, $vaarg($i));
+			m = $$max(m, $vaarg[$i]);
 		$endfor
 		return m;
 	$endif
@@ -379,7 +382,7 @@ macro min(x, y, ...)
 	$else
 		var m = $$min(x, y);
 		$for (var $i = 0; $i < $vacount; $i++)
-			m = $$min(m, $vaarg($i));
+			m = $$min(m, $vaarg[$i]);
 		$endfor
 		return m;
 	$endif
@@ -403,7 +406,7 @@ macro nearbyint(x) => $$nearbyint(x);
 macro pow(x, exp)
 {
 	$if types::is_floatlike($typeof(exp)):
-		return $$pow(values::promote_int(x), ($typeof(values::promote_int(x)))exp);
+		return $$pow(values::promote_int_same(x, exp), ($typeof(values::promote_int_same(x, exp)))exp);
 	$else
 		return $$pow_int(values::promote_int(x), exp);
 	$endif
@@ -690,6 +693,7 @@ macro ichar ichar[<*>].or(ichar[<*>] x) => $$reduce_or(x);
 macro ichar ichar[<*>].xor(ichar[<*>] x) => $$reduce_xor(x);
 macro ichar ichar[<*>].max(ichar[<*>] x) => $$reduce_max(x);
 macro ichar ichar[<*>].min(ichar[<*>] x) => $$reduce_min(x);
+macro ichar ichar[<*>].dot(ichar[<*>] x, ichar[<*>] y) => (x * y).sum();

 macro bool[<*>] short[<*>].comp_lt(short[<*>] x, short[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] short[<*>].comp_le(short[<*>] x, short[<*>] y) => $$veccomple(x, y);
@@ -705,6 +709,7 @@ macro short short[<*>].or(short[<*>] x) => $$reduce_or(x);
 macro short short[<*>].xor(short[<*>] x) => $$reduce_xor(x);
 macro short short[<*>].max(short[<*>] x) => $$reduce_max(x);
 macro short short[<*>].min(short[<*>] x) => $$reduce_min(x);
+macro short short[<*>].dot(short[<*>] x, short[<*>] y) => (x * y).sum();

 macro bool[<*>] int[<*>].comp_lt(int[<*>] x, int[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] int[<*>].comp_le(int[<*>] x, int[<*>] y) => $$veccomple(x, y);
@@ -720,6 +725,7 @@ macro int int[<*>].or(int[<*>] x) => $$reduce_or(x);
 macro int int[<*>].xor(int[<*>] x) => $$reduce_xor(x);
 macro int int[<*>].max(int[<*>] x) => $$reduce_max(x);
 macro int int[<*>].min(int[<*>] x) => $$reduce_min(x);
+macro int int[<*>].dot(int[<*>] x, int[<*>] y) => (x * y).sum();

 macro bool[<*>] long[<*>].comp_lt(long[<*>] x, long[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] long[<*>].comp_le(long[<*>] x, long[<*>] y) => $$veccomple(x, y);
@@ -734,6 +740,7 @@ macro long long[<*>].or(long[<*>] x) => $$reduce_or(x);
 macro long long[<*>].xor(long[<*>] x) => $$reduce_xor(x);
 macro long long[<*>].max(long[<*>] x) => $$reduce_max(x);
 macro long long[<*>].min(long[<*>] x) => $$reduce_min(x);
+macro long long[<*>].dot(long[<*>] x, long[<*>] y) => (x * y).sum();

 macro bool[<*>] int128[<*>].comp_lt(int128[<*>] x, int128[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] int128[<*>].comp_le(int128[<*>] x, int128[<*>] y) => $$veccomple(x, y);
@@ -748,6 +755,7 @@ macro int128 int128[<*>].or(int128[<*>] x) => $$reduce_or(x);
 macro int128 int128[<*>].xor(int128[<*>] x) => $$reduce_xor(x);
 macro int128 int128[<*>].max(int128[<*>] x) => $$reduce_max(x);
 macro int128 int128[<*>].min(int128[<*>] x) => $$reduce_min(x);
+macro int128 int128[<*>].dot(int128[<*>] x, int128[<*>] y) => (x * y).sum();

 macro bool[<*>] bool[<*>].comp_lt(bool[<*>] x, bool[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] bool[<*>].comp_le(bool[<*>] x, bool[<*>] y) => $$veccomple(x, y);
@@ -778,6 +786,7 @@ macro char char[<*>].or(char[<*>] x) => $$reduce_or(x);
 macro char char[<*>].xor(char[<*>] x) => $$reduce_xor(x);
 macro char char[<*>].max(char[<*>] x) => $$reduce_max(x);
 macro char char[<*>].min(char[<*>] x) => $$reduce_min(x);
+macro char char[<*>].dot(char[<*>] x, char[<*>] y) => (x * y).sum();

 macro bool[<*>] ushort[<*>].comp_lt(ushort[<*>] x, ushort[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] ushort[<*>].comp_le(ushort[<*>] x, ushort[<*>] y) => $$veccomple(x, y);
@@ -793,6 +802,7 @@ macro ushort ushort[<*>].or(ushort[<*>] x) => $$reduce_or(x);
 macro ushort ushort[<*>].xor(ushort[<*>] x) => $$reduce_xor(x);
 macro ushort ushort[<*>].max(ushort[<*>] x) => $$reduce_max(x);
 macro ushort ushort[<*>].min(ushort[<*>] x) => $$reduce_min(x);
+macro ushort ushort[<*>].dot(ushort[<*>] x, ushort[<*>] y) => (x * y).sum();

 macro bool[<*>] uint[<*>].comp_lt(uint[<*>] x, uint[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] uint[<*>].comp_le(uint[<*>] x, uint[<*>] y) => $$veccomple(x, y);
@@ -808,6 +818,7 @@ macro uint uint[<*>].or(uint[<*>] x) => $$reduce_or(x);
 macro uint uint[<*>].xor(uint[<*>] x) => $$reduce_xor(x);
 macro uint uint[<*>].max(uint[<*>] x) => $$reduce_max(x);
 macro uint uint[<*>].min(uint[<*>] x) => $$reduce_min(x);
+macro uint uint[<*>].dot(uint[<*>] x, uint[<*>] y) => (x * y).sum();

 macro bool[<*>] ulong[<*>].comp_lt(ulong[<*>] x, ulong[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] ulong[<*>].comp_le(ulong[<*>] x, ulong[<*>] y) => $$veccomple(x, y);
@@ -823,6 +834,7 @@ macro ulong ulong[<*>].or(ulong[<*>] x) => $$reduce_or(x);
 macro ulong ulong[<*>].xor(ulong[<*>] x) => $$reduce_xor(x);
 macro ulong ulong[<*>].max(ulong[<*>] x) => $$reduce_max(x);
 macro ulong ulong[<*>].min(ulong[<*>] x) => $$reduce_min(x);
+macro ulong ulong[<*>].dot(ulong[<*>] x, ulong[<*>] y) => (x * y).sum();

 macro bool[<*>] uint128[<*>].comp_lt(uint128[<*>] x, uint128[<*>] y) => $$veccomplt(x, y);
 macro bool[<*>] uint128[<*>].comp_le(uint128[<*>] x, uint128[<*>] y) => $$veccomple(x, y);
@@ -838,6 +850,7 @@ macro uint128 uint128[<*>].or(uint128[<*>] x) => $$reduce_or(x);
 macro uint128 uint128[<*>].xor(uint128[<*>] x) => $$reduce_xor(x);
 macro uint128 uint128[<*>].max(uint128[<*>] x) => $$reduce_max(x);
 macro uint128 uint128[<*>].min(uint128[<*>] x) => $$reduce_min(x);
+macro uint128 uint128[<*>].dot(uint128[<*>] x, uint128[<*>] y) => (x * y).sum();

 macro char char.sat_add(char x, char y) => $$sat_add(x, y);
 macro char char.sat_sub(char x, char y) => $$sat_sub(x, y);
@@ -1083,3 +1096,70 @@ macro overflow_mul_helper(x, y) @local
 	if ($$overflow_mul(x, y, &res)) return MathError.OVERFLOW?;
 	return res;
 }
+
+macro mul_div_helper(val, mul, div) @private
+{
+	var $Type = $typeof(val);
+	return ($Type)(($Type)mul * (val / ($Type)div) + ($Type)mul * (val % ($Type)div) / ($Type)div);
+}
+macro char char.muldiv(self, char mul, char div) => mul_div_helper(self, mul, div);
+macro ichar ichar.muldiv(self, ichar mul, ichar div) => mul_div_helper(self, mul, div);
+macro short short.muldiv(self, short mul, short div) => mul_div_helper(self, mul, div);
+macro ushort ushort.muldiv(self, ushort mul, ushort div) => mul_div_helper(self, mul, div);
+macro int int.muldiv(self, int mul, int div) => mul_div_helper(self, mul, div);
+macro uint uint.muldiv(self, uint mul, uint div) => mul_div_helper(self, mul, div);
+macro long long.muldiv(self, long mul, long div) => mul_div_helper(self, mul, div);
+macro ulong ulong.muldiv(self, ulong mul, ulong div) => mul_div_helper(self, mul, div);
+
+macro bool @is_same_vector_or_scalar(#vector_value, #vector_or_scalar) @private
+{
+	return (values::@is_vector(#vector_or_scalar) &&& values::@is_same_vector_type(#vector_value, #vector_or_scalar)) ||| values::@is_int(#vector_or_scalar);
+}
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro char[<*>] char[<*>].muldiv(self, mul, div)  => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro ichar[<*>] ichar[<*>].muldiv(self, mul, div)  => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro short[<*>] short[<*>].muldiv(self, mul, div) => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro ushort[<*>] ushort[<*>].muldiv(self, mul, div) => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro int[<*>] int[<*>].muldiv(self, mul, div) => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro uint[<*>] uint[<*>].muldiv(self, mul, div) => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro long[<*>] long[<*>].muldiv(self, mul, div) => mul_div_helper(self, mul, div);
+
+/**
+ * @require @is_same_vector_or_scalar(self, mul) `mul must be a vector of the same type as self, or be an integer scalar`
+ * @require @is_same_vector_or_scalar(self, div) `div must be a vector of the same type as self, or be an integer scalar`
+ */
+macro ulong[<*>] ulong[<*>].muldiv(self, mul, div) => mul_div_helper(self, mul, div);
--- a/lib/std/math/math_nolibc/__tan.c3
+++ b/lib/std/math/math_nolibc/__tan.c3
@@ -60,7 +60,7 @@ fn double __tan(double x, double y, int odd) @extern("__tan") @weak @nostrip
 	w = x + r;
 	if (big)
 	{
-		s = 1 - 2 * odd;
+		s = (double)(1 - 2 * odd);
 		v = s - 2.0 * (x + (r - w*w/(w + s)));
 		return sign ? -v : v;
 	}
--- a/lib/std/math/math_nolibc/rempi.c3
+++ b/lib/std/math/math_nolibc/rempi.c3
@@ -63,7 +63,7 @@ fn int __rem_pio2f(float x, double *y)
 	if (ix >= 0x7f800000)
 	{
 		// x is inf or NaN */
-		*y = x-x;
+		*y = x - (double)x;
 		return 0;
 	}
 	/* scale x into [2^23, 2^24-1] */
--- a/lib/std/math/math_random.c3
+++ b/lib/std/math/math_random.c3
@@ -1,18 +1,15 @@
+/**
+ * Randoms:
+ * General usage -
+ * 1. Create a Random (see std/math/random for various alternatives), or pick DefaultRandom
+ * 2. Define it `DefaultRandom my_random;`
+ * 3. Seed it: `random::seed(&my_random, some_seed);` or `rand::seed_entropy(&my_random);`
+ * 4. Use it with the functions in random: `float random_float = random::next_float(&my_random);`
+ *
+ * For just a simple integer between 0 and n (not including n), you can use `rand(n)`.
+ **/
 module std::math::random;

-interface Random
-{
-	fn void set_seed(char[] input);
-	fn char next_byte();
-	fn ushort next_short();
-	fn uint next_int();
-	fn ulong next_long();
-	fn uint128 next_int128();
-	fn void next_bytes(char[] buffer);
-}
-
-macro bool is_random(random) => $assignable(random, Random*);
-
 /**
 * @require is_random(random)
 **/
@@ -21,12 +18,19 @@ macro void seed(random, seed)
 	random.set_seed(@as_char_view(seed));
 }

+/**
+ * Seed the random with some best effort entropy.
+ *
+ * @require is_random(random)
+ **/
 macro void seed_entropy(random)
 {
 	random.set_seed(&&entropy());
 }

 /**
+ * Get the next value between 0 and max (not including max).
+ *
 * @require is_random(random)
 **/
 macro int next(random, int max)
@@ -34,6 +38,11 @@ macro int next(random, int max)
 	return (int)(next_double(random) * max);
 }

+def DefaultRandom = Sfc64Random;
+
+/**
+ * Get a default random value between 0 and max (not including max)
+ **/
 fn int rand(int max) @builtin
 {
 	tlocal Sfc64Random default_random;
@@ -45,15 +54,20 @@ fn int rand(int max) @builtin
 	}
 	return next(&default_random, max);
 }
+
 /**
+ * Get 'true' or 'false'
+ *
 * @require is_random(random)
 **/
 macro bool next_bool(random)
 {
-	return random.next_byte() & 1;
+	return (bool)(random.next_byte() & 1);
 }

 /**
+ * Get a float between 0 and 1.0, not including 1.0.
+ *
 * @require is_random(random)
 **/
 macro float next_float(random)
@@ -63,6 +77,8 @@ macro float next_float(random)
 }

 /**
+ * Get a double between 0 and 1.0, not including 1.0.
+ *
 * @require is_random(random)
 **/
 macro double next_double(random)
@@ -71,6 +87,9 @@ macro double next_double(random)
 	return val * 0x1.0p-53;
 }

+// True if the value is a Random.
+macro bool is_random(random) => $assignable(random, Random);
+
 macro uint128 @long_to_int128(#function) => (uint128)#function << 64 + #function;
 macro ulong @int_to_long(#function) => (ulong)#function << 32 + #function;
 macro uint @short_to_int(#function) => (uint)#function << 16 + #function;
@@ -95,3 +114,16 @@ macro @random_value_to_bytes(#function, char[] bytes)
 	}
 	unreachable();
 }
+
+// This is the interface to implement for Random implementations, usually
+// it is not invoked directly.
+interface Random
+{
+	fn void set_seed(char[] input);
+	fn char next_byte();
+	fn ushort next_short();
+	fn uint next_int();
+	fn ulong next_long();
+	fn uint128 next_int128();
+	fn void next_bytes(char[] buffer);
+}
--- a/lib/std/math/math_vector.c3
+++ b/lib/std/math/math_vector.c3
@@ -25,11 +25,11 @@ macro Vec4.distance_sq(self, Vec4 v2) => (self - v2).length_sq();

 macro Vec2f.transform(self, Matrix4f mat) => transform2(self, mat);
 macro Vec2f.rotate(self, float angle) => rotate(self, angle);
-macro Vec2f.angle(self, Vec2f v2) => math::atan2(v2[1], v2[0]) - math::atan2(self[1], v2[0]);
+macro Vec2f.angle(self, Vec2f v2) => math::atan2(v2.y, v2.x) - math::atan2(self.y, self.x);

 macro Vec2.transform(self, Matrix4 mat) => transform2(self, mat);
 macro Vec2.rotate(self, double angle) => rotate(self, angle);
-macro Vec2.angle(self, Vec2 v2) => math::atan2(v2[1], v2[0]) - math::atan2(self[1], v2[0]);
+macro Vec2.angle(self, Vec2 v2) => math::atan2(v2.y, v2.x) - math::atan2(self.y, self.x);

 macro Vec2f.clamp_mag(self, float min, float max) => clamp_magnitude(self, min, max);
 macro Vec3f.clamp_mag(self, float min, float max) => clamp_magnitude(self, min, max);
@@ -190,7 +190,7 @@ macro rotate_axis_angle(v, axis, angle) @private
 	var w = axis * math::sin(angle);
 	var wv = w.cross(v);
 	var wwv = w.cross(wv);
-	wv *= math::cos(angle) * 2;
+	wv *= math::cos(($typeof(v))angle) * 2;
 	wwv *= 2;

 	return v + wv + wwv;
--- a/lib/std/net/net.c3
+++ b/lib/std/net/net.c3
@@ -27,6 +27,7 @@ fault NetError
 	ALREADY_CONNECTED,
 	NETWORK_UNREACHABLE,
 	OPERATION_NOT_SUPPORTED_ON_SOCKET,
+	CONNECTION_RESET,
 }

 fn uint! ipv4toint(String s)
--- a/lib/std/net/os/posix.c3
+++ b/lib/std/net/os/posix.c3
@@ -16,11 +16,11 @@ struct Posix_pollfd
 def Posix_nfds_t = CUInt;

 extern fn CInt connect(NativeSocket socket, SockAddrPtr address, Socklen_t address_len);
-extern fn NativeSocket socket(AIFamily af, AISockType type, AIProtocol ip_protocol) @extern("socket");
-extern fn int fcntl(NativeSocket socket, int cmd, ...) @extern("fcntl");
-extern fn CInt bind(NativeSocket socket, SockAddrPtr address, Socklen_t address_len) @extern("bind");
-extern fn CInt listen(NativeSocket socket, CInt backlog) @extern("listen");
-extern fn NativeSocket accept(NativeSocket socket, SockAddrPtr address, Socklen_t* address_len) @extern("accept");
+extern fn NativeSocket socket(AIFamily af, AISockType type, AIProtocol ip_protocol);
+extern fn int fcntl(NativeSocket socket, int cmd, ...);
+extern fn CInt bind(NativeSocket socket, SockAddrPtr address, Socklen_t address_len);
+extern fn CInt listen(NativeSocket socket, CInt backlog);
+extern fn NativeSocket accept(NativeSocket socket, SockAddrPtr address, Socklen_t* address_len);
 extern fn CInt poll(Posix_pollfd* fds, Posix_nfds_t nfds, CInt timeout);

 const CUShort POLLIN      = 0x0001;
@@ -39,6 +39,7 @@ fn anyfault convert_error(Errno error)
 		case errno::EALREADY: return NetError.CONNECTION_ALREADY_IN_PROGRESS;
 		case errno::EBADF: return NetError.BAD_SOCKET_DESCRIPTOR;
 		case errno::ECONNREFUSED: return NetError.CONNECTION_REFUSED;
+		case errno::ECONNRESET: return NetError.CONNECTION_RESET;
 		case errno::EISCONN: return NetError.ALREADY_CONNECTED;
 		case errno::ENETUNREACH: return NetError.NETWORK_UNREACHABLE;
 		case errno::ENOTSOCK: return NetError.NOT_A_SOCKET;
@@ -55,6 +56,11 @@ fn anyfault socket_error()
 	return convert_error(libc::errno());
 }

+macro bool NativeSocket.is_valid(self)
+{
+	return (iptr)self >= 0;
+}
+
 macro void! NativeSocket.close(self)
 {
 	if (libc::close(self))
--- a/lib/std/net/os/win32.c3
+++ b/lib/std/net/os/win32.c3
@@ -12,7 +12,7 @@ const int FIONREAD = 1074030207;
 const int FIONBIO = -2147195266;
 const int FIOASYNC = -2147195267;

-distinct NativeSocket = uptr;
+distinct NativeSocket = inline Win32_SOCKET;

 extern fn CInt ioctlsocket(NativeSocket, CLong cmd, CULong *argp);
 extern fn WSAError closesocket(NativeSocket);
@@ -22,6 +22,11 @@ extern fn int bind(NativeSocket, SockAddrPtr address, Socklen_t address_len);
 extern fn int listen(NativeSocket, int backlog);
 extern fn NativeSocket accept(NativeSocket, SockAddrPtr address, Socklen_t* address_len);

+macro bool NativeSocket.is_valid(self)
+{
+	return self != (NativeSocket)(uptr)-1;
+}
+
 fn void! NativeSocket.set_non_blocking(self, bool non_blocking)
 {
 	if (ioctlsocket(self, win32::FIONBIO, &&(CULong)non_blocking))
@@ -76,6 +81,7 @@ fn anyfault convert_error(WSAError error)
        case wsa::ENOTSOCK: return NetError.NOT_A_SOCKET;
        case wsa::EOPNOTSUPP: return NetError.OPERATION_NOT_SUPPORTED_ON_SOCKET;
        case wsa::ETIMEDOUT: return NetError.CONNECTION_TIMED_OUT;
+        case wsa::ECONNRESET: return NetError.CONNECTION_RESET;
 		default: return IoError.GENERAL_ERROR;
 	}
 }
--- a/lib/std/net/socket.c3
+++ b/lib/std/net/socket.c3
@@ -15,7 +15,7 @@ macro void @loop_over_ai(AddrInfo* ai; @body(NativeSocket fd, AddrInfo* ai))
 	while (ai)
 	{
 		NativeSocket sockfd = os::socket(ai.ai_family, ai.ai_socktype, ai.ai_protocol);
-		if (sockfd > 0)
+		if (sockfd.is_valid())
 		{
 			@body(sockfd, ai);
 		}
@@ -120,8 +120,12 @@ fn bool! Socket.get_option(&self, SocketOption option)

 fn usz! Socket.read(&self, char[] bytes) @dynamic
 {
-	isz n = libc::read((Fd)self.sock, bytes.ptr, bytes.len);
-	if (n < 0) return NetError.READ_FAILED?;
+$if env::WIN32:
+	isz n = libc::recv(self.sock, bytes.ptr, (int)bytes.len, 0);
+$else
+	isz n = libc::recv(self.sock, bytes.ptr, bytes.len, 0);
+$endif
+	if (n < 0) return os::socket_error()?;
 	return (usz)n;
 }

@@ -129,8 +133,12 @@ fn char! Socket.read_byte(&self) @dynamic => io::@read_byte_using_read(self);

 fn usz! Socket.write(&self, char[] bytes) @dynamic
 {
-	isz n = libc::write((Fd)self.sock, bytes.ptr, bytes.len);
-	if (n < 0) return NetError.WRITE_FAILED?;
+$if env::WIN32:
+	isz n = libc::send(self.sock, bytes.ptr, (int)bytes.len, 0);
+$else
+	isz n = libc::send(self.sock, bytes.ptr, bytes.len, 0);
+$endif
+	if (n < 0) return os::socket_error()?;
 	return (usz)n;
 }

--- a/lib/std/net/tcp.c3
+++ b/lib/std/net/tcp.c3
@@ -43,8 +43,9 @@ fn TcpServerSocket! listen(String host, uint port, uint backlog, SocketOption...
 fn TcpSocket! accept(TcpServerSocket* server_socket)
 {
 	TcpSocket socket;
+	socket.ai_addrlen = socket.ai_addr_storage.len;
 	socket.sock = os::accept(server_socket.sock, (SockAddrPtr)&socket.ai_addr_storage, &socket.ai_addrlen);
-	if (socket.sock < 0) return NetError.ACCEPT_FAILED?;
+	if (!socket.sock.is_valid()) return NetError.ACCEPT_FAILED?;
 	return socket;
 }

--- a/lib/std/os/env.c3
+++ b/lib/std/os/env.c3
@@ -83,10 +83,15 @@ fn String! get_home_dir(Allocator using = allocator::heap())
 	return get_var(home, using);
 }

+fn Path! get_config_dir(Allocator allocator = allocator::heap()) @deprecated("use new_get_config_dir()")
+{
+	return new_get_config_dir(allocator) @inline;
+}
+
 /**
 * Returns the current user's config directory.
 **/
-fn Path! get_config_dir(Allocator allocator = allocator::heap())
+fn Path! new_get_config_dir(Allocator allocator = allocator::heap())
 {
 	@pool(allocator)
 	{
@@ -100,7 +105,7 @@ fn Path! get_config_dir(Allocator allocator = allocator::heap())
 			String s = get_var_temp("XDG_CONFIG_HOME") ?? get_var_temp("HOME")!;
 			const DIR = ".config";
 		$endif
-		return path::temp_new(s).append(DIR, .allocator = allocator);
+		return path::temp_new(s).new_append(DIR, .allocator = allocator);
 	$endif
 	};
 }
@@ -126,11 +131,16 @@ fn bool clear_var(String name)
 	};
 }

-fn String! executable_path(Allocator allocator = allocator::heap())
+fn String! executable_path(Allocator allocator = allocator::heap()) @deprecated("use new_executable_path()")
+{
+	return new_executable_path(allocator) @inline;
+}
+
+fn String! new_executable_path(Allocator allocator = allocator::heap())
 {
 	$if env::DARWIN:
 		return darwin::executable_path(allocator);
 	$else
-		return "<Unsupported>";
+		return SearchResult.MISSING?;
 	$endif
 }
--- a/lib/std/os/macos/darwin.c3
+++ b/lib/std/os/macos/darwin.c3
@@ -80,7 +80,7 @@ fn uptr! load_address() @local
 {
 	Darwin_segment_command_64* cmd = darwin::getsegbyname("__TEXT");
 	if (!cmd) return BacktraceFault.SEGMENT_NOT_FOUND?;
-	String path = env::executable_path(allocator::temp()) ?? BacktraceFault.EXECUTABLE_PATH_NOT_FOUND?!;
+	String path = env::new_executable_path(allocator::temp()) ?? BacktraceFault.EXECUTABLE_PATH_NOT_FOUND?!;
    uint dyld_count = darwin::_dyld_image_count();
 	for (uint i = 0; i < dyld_count; i++)
 	{
--- a/lib/std/os/win32/files.c3
+++ b/lib/std/os/win32/files.c3
@@ -6,7 +6,6 @@ enum Win32_GET_FILEEX_INFO_LEVELS
 	MAX,
 }

-
 struct Win32_FILE_ATTRIBUTE_DATA
 {
 	Win32_DWORD    dwFileAttributes;
@@ -17,7 +16,6 @@ struct Win32_FILE_ATTRIBUTE_DATA
 	Win32_DWORD    nFileSizeLow;
 }

-
 const MAX_PATH = 260;

 struct Win32_WIN32_FIND_DATAW
--- a/lib/std/os/win32/gdi.c3
+++ b/lib/std/os/win32/gdi.c3
@@ -0,0 +1,6 @@
+module std::os::win32 @if(env::WIN32);
+
+extern fn Win32_HBRUSH createSolidBrush(Win32_COLORREF) @extern("CreateSolidBrush");
+extern fn Win32_COLORREF setTextColor(Win32_HDC, Win32_COLORREF) @extern("SetTextColor");
+extern fn CInt setBkMode(Win32_HDC, CInt) @extern("SetBkMode");
+extern fn Win32_BOOL textOut(Win32_HDC, CInt, CInt, Win32_LPCWSTR, CInt) @extern("TextOutW");
--- a/lib/std/os/win32/heap.c3
+++ b/lib/std/os/win32/heap.c3
@@ -2,10 +2,10 @@ module std::os::win32 @if(env::WIN32);

 extern fn void* _aligned_malloc(usz size, usz alignment);
 extern fn void* _aligned_realloc(void* memblock, usz size, usz alignment);
-extern fn void* _aligned_recalloc(void* memblock, usz size, usz alignment);
+extern fn void* _aligned_recalloc(void* memblock, usz num, usz size, usz alignment);
 extern fn void _aligned_free(void* memblock);
 extern fn void _aligned_msize(void* memblock, usz alignment, usz offset);
 extern fn void* _aligned_offset_malloc(usz size, usz alignment, usz offset);
 extern fn void* _aligned_offset_realloc(void* memblock, usz size, usz alignment, usz offset);
-extern fn void* _aligned_offset_recalloc(void* memblock, usz size, usz alignment, usz offset);
+extern fn void* _aligned_offset_recalloc(void* memblock, usz num, usz size, usz alignment, usz offset);
 extern fn usz _msize(void* memblock);
--- a/lib/std/os/win32/process.c3
+++ b/lib/std/os/win32/process.c3
@@ -53,15 +53,17 @@ extern fn Win32_BOOL releaseMutex(Win32_HANDLE) @extern("ReleaseMutex");
 extern fn void enterCriticalSection(Win32_CRITICAL_SECTION* section) @extern("EnterCriticalSection");
 extern fn void leaveCriticalSection(Win32_CRITICAL_SECTION* section) @extern("LeaveCriticalSection");
 extern fn Win32_BOOL tryEnterCriticalSection(Win32_CRITICAL_SECTION* section) @extern("TryEnterCriticalSection");
-extern fn uint waitForSingleObject(Win32_HANDLE, uint milliseconds) @extern("WaitForSingleObject");
+extern fn Win32_DWORD waitForSingleObject(Win32_HANDLE hHandle, Win32_DWORD dwMilliseconds) @extern("WaitForSingleObject");
+extern fn Win32_DWORD waitForSingleObjectEx(Win32_HANDLE hHandle, Win32_DWORD dwMilliseconds, Win32_BOOL bAlertable) @extern("WaitForSingleObjectEx");
+extern fn Win32_DWORD waitForMultipleObjects(Win32_DWORD nCount, Win32_HANDLE* lpHandles, Win32_BOOL bWaitAll, Win32_DWORD dwMilliseconds) @extern("WaitForMultipleObjects");
+extern fn Win32_DWORD waitForMultipleObjectsEx(Win32_DWORD nCount, Win32_HANDLE* lpHandles, Win32_BOOL bWaitAll, Win32_DWORD dwMilliseconds, Win32_BOOL bAlertable) @extern("WaitForMultipleObjectsEx");
 extern fn void sleep(uint ms) @extern("Sleep");
-extern fn uint waitForMultipleObjects(uint count, Win32_HANDLE* handles, Win32_BOOL wait_all, uint ms) @extern("WaitForMultipleObjects");
 extern fn Win32_BOOL resetEvent(Win32_HANDLE event) @extern("ResetEvent");
 extern fn Win32_BOOL setEvent(Win32_HANDLE handle) @extern("SetEvent");
 extern fn long interlockedCompareExchange(int* dest, int exchange, int comperand) @extern("InterlockedCompareExchange");
 extern fn Win32_DWORD sleepEx(Win32_DWORD ms, Win32_BOOL alertable) @extern("SleepEx");
-extern fn Win32_HANDLE createThread(void* attributes, usz stack, ThreadFn func, void* arg, uint flags, uint* thread_id) @extern("CreateThread");
-extern fn Win32_BOOL getExitCodeThread(Win32_HANDLE handle, uint* exit_code) @extern("GetExitCodeThread");
+extern fn Win32_HANDLE createThread(void* attributes, usz stack, ThreadFn func, Win32_LPVOID arg, Win32_DWORD flags, Win32_LPDWORD thread_id) @extern("CreateThread");
+extern fn Win32_BOOL getExitCodeThread(Win32_HANDLE handle, Win32_LPDWORD exit_code) @extern("GetExitCodeThread");
 extern fn Win32_BOOL getExitCodeProcess(Win32_HANDLE hProcess, Win32_LPDWORD lpExitCode) @extern("GetExitCodeProcess");
 extern fn Win32_DWORD getThreadId(Win32_HANDLE) @extern("GetThreadId");
 extern fn void exitThread(Win32_DWORD dwExitCode) @noreturn @extern("ExitThread");
--- a/lib/std/os/win32/windef.c3
+++ b/lib/std/os/win32/windef.c3
@@ -0,0 +1,33 @@
+module std::os::win32 @if(env::WIN32);
+
+struct Win32_RECT
+{
+	Win32_LONG left;
+	Win32_LONG top;
+	Win32_LONG right;
+	Win32_LONG bottom;
+}
+
+struct Win32_POINT
+{
+	Win32_LONG x;
+	Win32_LONG y;
+}
+
+struct Win32_SIZE
+{
+	Win32_LONG cx;
+	Win32_LONG cy;
+}
+
+def Win32_PSIZE = Win32_SIZE*;
+def Win32_NPSIZE = Win32_SIZE*;
+def Win32_LPSIZE = Win32_SIZE*;
+
+def Win32_PPOINT = Win32_POINT*;
+def Win32_NPOINT = Win32_POINT*;
+def Win32_LPOINT = Win32_POINT*;
+
+def Win32_PRECT = Win32_RECT*;
+def Win32_NPRECT = Win32_RECT*;
+def Win32_LPRECT = Win32_RECT*;
--- a/lib/std/os/win32/winuser.c3
+++ b/lib/std/os/win32/winuser.c3
@@ -0,0 +1,150 @@
+module std::os::win32 @if(env::WIN32);
+
+def Win32_WNDPROC = fn Win32_LRESULT(Win32_HWND, Win32_UINT, Win32_WPARAM, Win32_LPARAM);
+
+struct Win32_WNDCLASSEXW
+{
+	Win32_UINT      cbSize;
+	Win32_UINT      style;
+	Win32_WNDPROC   lpfnWndProc;
+	CInt            cbClsExtra;
+	CInt            cbWndExtra;
+	Win32_HINSTANCE hInstance;
+	Win32_HICON     hIcon;
+	Win32_HCURSOR   hCursor;
+	Win32_HBRUSH    hbrBackground;
+	Win32_LPCWSTR   lpszMenuName;
+	Win32_LPCWSTR   lpszClassName;
+	Win32_HICON     hIconSm;
+}
+
+struct Win32_MSG
+{
+	Win32_HWND hwnd;
+	Win32_UINT message;
+	Win32_WPARAM wParam;
+	Win32_LPARAM lParam;
+	Win32_DWORD time;
+	Win32_POINT pt;
+	Win32_DWORD lPrivate;
+}
+
+struct Win32_PAINTSTRUCT
+{
+	Win32_HDC  hdc;
+	Win32_BOOL fErase;
+	Win32_RECT rcPaint;
+	Win32_BOOL fRestore;
+	Win32_BOOL fIncUpdate;
+	Win32_BYTE[32] rgbReserved;
+}
+def Win32_PWNDCLASSEXW = Win32_WNDCLASSEXW*;
+def Win32_LPWNDCLASSEXW = Win32_WNDCLASSEXW*;
+def Win32_NPWNDCLASSEXW = Win32_WNDCLASSEXW*;
+
+def Win32_PPAINTSTRUCT = Win32_PAINTSTRUCT*;
+def Win32_LPPAINTSTRUCT = Win32_PAINTSTRUCT*;
+def Win32_NPPAINTSTRUCT = Win32_PAINTSTRUCT*;
+
+def Win32_PMSG = Win32_MSG*;
+def Win32_LPMSG = Win32_MSG*;
+def Win32_NPMSG = Win32_MSG*;
+
+def Win32_ATOM = ushort;
+
+const Win32_DWORD WS_BORDER           = 0x00800000L;
+const Win32_DWORD WS_CAPTION          = 0x00C00000L;
+const Win32_DWORD WS_CHILD            = 0x40000000L;
+const Win32_DWORD WS_CHILDWINDOW      = 0x40000000L;
+const Win32_DWORD WS_CLIPCHILDREN     = 0x02000000L;
+const Win32_DWORD WS_CLIPSIBLINGS     = 0x04000000L;
+const Win32_DWORD WS_DISABLED         = 0x08000000L;
+const Win32_DWORD WS_DLGFRAME         = 0x00400000L;
+const Win32_DWORD WS_GROUP            = 0x00020000L;
+const Win32_DWORD WS_HSCROLL          = 0x00100000L;
+const Win32_DWORD WS_ICONIC           = 0x20000000L;
+const Win32_DWORD WS_MAXIMIZE         = 0x01000000L;
+const Win32_DWORD WS_MAXIMIZEBOX      = 0x00010000L;
+const Win32_DWORD WS_MINIMIZE         = 0x20000000L;
+const Win32_DWORD WS_MINIMIZEBOX      = 0x00020000L;
+const Win32_DWORD WS_OVERLAPPED       = 0x00000000L;
+const Win32_DWORD WS_OVERLAPPEDWINDOW = WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
+const Win32_DWORD WS_POPUP            = 0x80000000L;
+const Win32_DWORD WS_POPUPWINDOW      = WS_POPUP | WS_BORDER | WS_SYSMENU;
+const Win32_DWORD WS_SIZEBOX          = 0x00040000L;
+const Win32_DWORD WS_SYSMENU          = 0x00080000L;
+const Win32_DWORD WS_TABSTOP          = 0x00010000L;
+const Win32_DWORD WS_THICKFRAME       = 0x00040000L;
+const Win32_DWORD WS_TILED            = 0x00000000L;
+const Win32_DWORD WS_TILEDWINDOW      = WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_THICKFRAME | WS_MINIMIZEBOX | WS_MAXIMIZEBOX;
+const Win32_DWORD WS_VISIBLE          = 0x10000000L;
+const Win32_DWORD WS_VSCROLL          = 0x00200000L;
+
+const Win32_UINT MB_OK = 0x00000000;
+const Win32_UINT MB_OKCANCEL = 0x00000001;
+const Win32_UINT MB_ABORTRETRYIGNORE = 0x00000002;
+const Win32_UINT MB_YESNOCANCEL = 0x00000003;
+const Win32_UINT MB_YESNO = 0x00000004;
+const Win32_UINT MB_RETRYCANCEL = 0x00000005;
+const Win32_UINT MB_CANCELTRYCONTINUE = 0x00000006;
+const Win32_UINT MB_ICONHAND = 0x00000010;
+const Win32_UINT MB_ICONQUESTION = 0x00000020;
+const Win32_UINT MB_ICONEXCLAMATION = 0x00000030;
+const Win32_UINT MB_ICONASTERISK = 0x00000040;
+const Win32_UINT MB_USERICON = 0x00000080;
+const Win32_UINT MB_ICONWARNING = MB_ICONEXCLAMATION;
+const Win32_UINT MB_ICONERROR = MB_ICONHAND;
+const Win32_UINT MB_ICONINFORMATION = MB_ICONASTERISK;
+const Win32_UINT MB_ICONSTOP = MB_ICONHAND;
+
+const GWL_WNDPROC @if(env::ARCH_32_BIT) = -4;
+const GWL_HINSTANCE @if(env::ARCH_32_BIT) = -6;
+const GWL_HWNDPARENT @if(env::ARCH_32_BIT) = -8;
+const GWL_STYLE = -16;
+const GWL_EXSTYLE = -20;
+const GWL_USERDATA @if(env::ARCH_32_BIT) = -21;
+const GWL_ID = -12;
+const GWLP_WNDPROC = -4;
+const GWLP_HINSTANCE = -6;
+const GWLP_HWNDPARENT = -8;
+const GWLP_USERDATA = -21;
+const GWLP_ID = -12;
+
+extern fn Win32_HDC beginPaint(Win32_HWND, Win32_LPPAINTSTRUCT) @extern("BeginPaint");
+extern fn Win32_LRESULT callWindowProcW(Win32_WNDPROC lpPrevWndFunc, Win32_HWND hWnd, Win32_UINT msg, Win32_WPARAM wParam, Win32_LPARAM lParam) @extern("CallWindowProcW");
+extern fn Win32_HWND createWindowExW(Win32_DWORD, Win32_LPCWSTR, Win32_LPCWSTR, Win32_DWORD, CInt, CInt, CInt, CInt, Win32_HWND, Win32_HMENU, Win32_HINSTANCE, Win32_LPVOID) @extern("CreateWindowExW");
+extern fn Win32_LRESULT defWindowProcW(Win32_HWND, Win32_UINT, Win32_WPARAM, Win32_LPARAM) @extern("DefWindowProcW");
+extern fn Win32_BOOL dispatchMessage(Win32_MSG* lpMsg) @extern("DispatchMessageW");
+extern fn Win32_BOOL endPaint(Win32_HWND, Win32_LPPAINTSTRUCT) @extern("EndPaint");
+extern fn Win32_BOOL getMessageW(Win32_LPMSG, Win32_HWND, Win32_UINT, Win32_UINT) @extern("GetMessageW");
+extern fn Win32_BOOL getUpdateRect(Win32_HWND hWnd, Win32_LPRECT lpRect, Win32_BOOL bErase) @extern("GetUpdateRect");
+extern fn Win32_LONG_PTR getWindowLongPtrW(Win32_HWND hWnd, CInt nIndex) @extern("GetWindowLongPtrW");
+extern fn Win32_LONG getWindowLongW(Win32_HWND hWnd, CInt nIndex) @extern("GetWindowLongW");
+extern fn Win32_HCURSOR loadCursorW(Win32_HINSTANCE instance, Win32_LPCWSTR cursorName) @extern("LoadCursorW");
+extern fn Win32_HICON loadIconW(Win32_HINSTANCE instance, Win32_LPCWSTR iconName) @extern("LoadIconW");
+extern fn int messageBoxW(Win32_HWND hWnd, Win32_LPCWSTR lpText, Win32_LPCWSTR lpCaption, Win32_UINT uType) @extern("MessageBoxW");
+extern fn void postQuitMessage(CInt) @extern("PostQuitMessage");
+extern fn Win32_ATOM registerClassExW(Win32_WNDCLASSEXW*) @extern("RegisterClassExW");
+extern fn Win32_LONG_PTR setWindowLongPtrW(Win32_HWND hWnd, CInt nIndex, Win32_LONG_PTR dwNewLong) @extern("SetWindowLongPtrW");
+extern fn Win32_LONG setWindowLongW(Win32_HWND hWnd, CInt nIndex, Win32_LONG dwNewLong) @extern("SetWindowLongW");
+extern fn Win32_BOOL showWindow(Win32_HWND, CInt) @extern("ShowWindow");
+extern fn Win32_BOOL translateMessage(Win32_MSG* lpMsg) @extern("TranslateMessage");
+extern fn Win32_BOOL updateWindow(Win32_HWND) @extern("UpdateWindow");
+
+macro getWindowLongPtr(Win32_HWND hWnd, CInt nIndex)
+{
+	$if env::ARCH_64_BIT:
+		return getWindowLongPtrW(hWnd, nIndex);
+	$else
+		return getWindowLongW(hWnd, nIndex);
+	$endif
+}
+
+macro setWindowLongPtr(Win32_HWND hWnd, CInt nIndex, dwNewLong)
+{
+	$if env::ARCH_64_BIT:
+		return setWindowLongPtrW(hWnd, nIndex, dwNewLong);
+	$else
+		return setWindowLongW(hWnd, nIndex, dwNewLong);
+	$endif
+}
--- a/lib/std/os/win32/wsa.c3
+++ b/lib/std/os/win32/wsa.c3
@@ -32,6 +32,8 @@ extern fn CInt win32_WSAPoll(Win32_LPWSAPOLLFD fdArray, Win32_ULONG fds, Win32_I
 extern fn WSAError win32_WSAGetLastError() @extern("WSAGetLastError") @builtin;
 extern fn void win32_WSASetLastError(WSAError error) @extern("WSASetLastError") @builtin;
 extern fn CInt win32_WSAStartup(Win32_WORD, void*) @extern("WSAStartup") @builtin;
+extern fn CInt win32_WSACleanup() @extern("WSACleanup") @builtin;
+
 const int FIONBIO = -2147195266;
 const int FIONREAD = 1074030207;
 const int SIOCATMARK = 1074033415;
--- a/lib/std/sort/binarysearch.c3
+++ b/lib/std/sort/binarysearch.c3
@@ -3,17 +3,20 @@ module std::sort;
 /**
 * Perform a binary search over the sorted array and return the index
 * in [0, array.len) where x would be inserted or cmp(i) is true and cmp(j) is true for j in [i, array.len).
- * @require $defined(list[0]) && $defined(list.len) "The list must be indexable"
- * @require $or(@typeid(cmp) == void*.typeid, @is_comparer(cmp, list)) "Expected a comparison function which compares values"
+ * @require @is_sortable(list) "The list must be sortable"
+ * @require @is_valid_cmp_fn(cmp, list, context) "Expected a comparison function which compares values"
+ * @require @is_valid_context(cmp, context) "Expected a valid context"
 **/
-macro usz binarysearch(list, x, cmp = null) @builtin
+macro usz binarysearch(list, x, cmp = EMPTY_MACRO_SLOT, context = EMPTY_MACRO_SLOT) @builtin
 {
 	usz i;
 	usz len = @len_from_list(list);
+	var $no_cmp = @is_empty_macro_slot(cmp);
+	var $has_context = @is_valid_macro_slot(context);
 	for (usz j = len; i < j;)
 	{
 		usz half = i + (j - i) / 2;
-		$if @typeid(cmp) == void*.typeid:
+		$if $no_cmp:
 			switch
 			{
 				case greater(list[half], x): j = half;
@@ -21,11 +24,20 @@ macro usz binarysearch(list, x, cmp = null) @builtin
 				default: return half;
 			}
 		$else
+
 			$switch
-				$case $typeof(cmp).params[0] == @typeid(list[0]):
+				$case $defined(cmp(list[0], list[0], context)):
+					int res = cmp(list[half], x, context);
+				$case $defined(cmp(list[0], list[0])):
+					assert(!$has_context);
 					int res = cmp(list[half], x);
-				$default:
+				$case $defined(cmp(&list[0], &list[0], context)):
+					int res = cmp(&list[half], &x, context);
+				$case $defined(cmp(&list[0], &list[0])):
+					assert(!$has_context);
 					int res = cmp(&list[half], &x);
+				$default:
+					assert(false, "Invalid comparison function");
 			$endswitch
 			switch
 			{
--- a/lib/std/sort/countingsort.c3
+++ b/lib/std/sort/countingsort.c3
@@ -0,0 +1,181 @@
+module std::sort;
+import std::sort::is;
+import std::sort::cs;
+import std::sort::qs;
+
+/**
+ * Sort list using the counting sort algorithm.
+ * @require @is_sortable(list) "The list must be indexable and support .len or .len()"
+ * @require @is_cmp_key_fn(key_fn, list) "Expected a transformation function which returns an unsigned integer."
+ **/
+macro countingsort(list, key_fn = EMPTY_MACRO_SLOT) @builtin
+{
+	usz len = sort::@len_from_list(list);
+	cs::csort(<$typeof(list), $typeof(key_fn)>)(list, 0, len, key_fn, ~((uint)0));
+}
+
+macro insertionsort_indexed(list, start, end, cmp = EMPTY_MACRO_SLOT, context = EMPTY_MACRO_SLOT) @builtin
+{
+	is::isort(<$typeof(list), $typeof(cmp), $typeof(context)>)(list, (usz)start, (usz)end, cmp, context);
+}
+
+macro quicksort_indexed(list, start, end, cmp = EMPTY_MACRO_SLOT, context = EMPTY_MACRO_SLOT) @builtin
+{
+	qs::qsort(<$typeof(list), $typeof(cmp), $typeof(context)>)(list, (isz)start, (isz)(end-1), cmp, context);
+}
+
+module std::sort::cs(<Type, KeyFn>);
+
+def Counts = usz[256] @private;
+def Ranges = usz[257] @private;
+def Indexs = char[256] @private;
+def ElementType = $typeof(Type{}[0]);
+
+const bool NO_KEY_FN @private = types::is_same(KeyFn, EmptySlot);
+const bool KEY_BY_VALUE @private = NO_KEY_FN ||| $assignable(Type{}[0], $typefrom(KeyFn.params[0]));
+const bool LIST_HAS_REF @private = $defined(&Type{}[0]);
+
+def KeyFnReturnType = $typefrom(KeyFn.returns) @if(!NO_KEY_FN);
+def KeyFnReturnType = ElementType @if(NO_KEY_FN);
+def CmpCallback = fn int(ElementType, ElementType) @if(KEY_BY_VALUE && NO_KEY_FN);
+def CmpCallback = fn int(ElementType*, ElementType*) @if(!KEY_BY_VALUE && NO_KEY_FN);
+def CmpCallback = fn int(ElementType, ElementType, KeyFn) @if(KEY_BY_VALUE && !NO_KEY_FN);
+def CmpCallback = fn int(ElementType*, ElementType*, KeyFn) @if(!KEY_BY_VALUE && !NO_KEY_FN);
+
+fn void csort(Type list, usz low, usz high, KeyFn key_fn, uint byte_idx)
+{
+	if (high <= low) return;
+	$if NO_KEY_FN:
+		CmpCallback compare_fn = fn (lhs, rhs) => compare_to(lhs, rhs);
+	$else
+		CmpCallback compare_fn = fn (lhs, rhs, key_fn) => compare_to(key_fn(lhs), key_fn(rhs));
+	$endif;
+
+	byte_idx = byte_idx >= KeyFnReturnType.sizeof ? KeyFnReturnType.sizeof - 1 : byte_idx;
+
+	Counts counts;
+	Ranges ranges;
+	Indexs indexs;
+
+	KeyFnReturnType mn = ~(KeyFnReturnType)0;
+	KeyFnReturnType mx = 0;
+
+	char last_key = 0;
+	char keys_ordered = 1;
+
+	for (usz i = low; i < high; i++)
+	{
+		$switch
+			$case NO_KEY_FN:
+				KeyFnReturnType k = list[i];
+			$case KEY_BY_VALUE:
+				KeyFnReturnType k = key_fn(list[i]);
+			$case LIST_HAS_REF:
+				KeyFnReturnType k = key_fn(&list[i]);
+			$default:
+				KeyFnReturnType k = key_fn(&&list[i]);
+		$endswitch;
+
+		char key_byte = (char)((k >> (byte_idx * 8)) & 0xff);
+		++counts[key_byte];
+
+		mn = k < mn ? k : mn;
+		mx = k > mx ? k : mx;
+
+		keys_ordered = keys_ordered & (char)(key_byte >= last_key); 
+		last_key = key_byte;
+	}
+
+	KeyFnReturnType diff = mx - mn;
+	if (diff == 0) return;
+
+	ushort fallback0_count = 0;
+	ushort fallback1_count = 0;
+	ushort recursion_count = 0;
+
+	usz total = 0;
+	foreach (char i, count : counts)
+	{
+		indexs[fallback0_count]       = i;
+		indexs[255 - recursion_count] = i;
+
+		fallback0_count += (ushort)(count > 1 && count <= 32);
+		recursion_count += (ushort)(count > 128);
+
+		counts[i] = total;
+		ranges[i] = total;
+		total += count;
+	}
+	ranges[256] = total;
+	
+	ushort remaining_indexs = 256 - (fallback0_count + recursion_count);
+	for(ushort i = 0; (i < 256) && remaining_indexs; i++) {
+		indexs[fallback0_count + fallback1_count] = (char)i;
+		usz count = ranges[i + 1] - ranges[i];
+		ushort within_fallback1_range = (ushort)(count > 32 && count <= 128);
+		fallback1_count += within_fallback1_range;
+		remaining_indexs -= within_fallback1_range;
+	}
+	
+	if (!keys_ordered)
+	{
+		usz sorted_count = 0;
+
+		do
+		{
+			foreach (x, s : counts)
+			{
+				usz e = ranges[x + 1];
+				sorted_count += (e - s);
+				for (; s < e; s++)
+				{
+					$switch
+					$case NO_KEY_FN:
+						KeyFnReturnType k = list[low + s];
+					$case KEY_BY_VALUE:
+						KeyFnReturnType k = key_fn(list[low + s]);
+					$case LIST_HAS_REF:
+						KeyFnReturnType k = key_fn(&list[low + s]);
+					$default:
+						KeyFnReturnType k = key_fn(&&list[low + s]);
+					$endswitch;
+					char k_idx = (char)(k >> (byte_idx * 8));
+					usz target_idx = counts[k_idx];
+					@swap(list[low + s], list[low + target_idx]);
+					counts[k_idx]++;
+				}
+			}
+		} while (sorted_count < ranges[256]);
+	}
+
+	if (byte_idx)
+	{
+		for (usz p = 0; p < fallback0_count; p++) {
+			usz i = indexs[p];
+
+			usz	start_offset = ranges[i];
+			usz	end_offset   = ranges[i + 1];
+
+			insertionsort_indexed(list, low + start_offset, low + end_offset, compare_fn, key_fn);
+		}
+
+		for (usz p = 0; p < fallback1_count; p++) {
+			usz i = indexs[fallback0_count + p];
+
+			usz	start_offset = ranges[i];
+			usz	end_offset   = ranges[i + 1];
+
+			quicksort_indexed(list, low + start_offset, low + end_offset, compare_fn, key_fn);
+		}
+
+		for (usz p = 0; p < recursion_count; p++)
+		{
+			usz i = indexs[255 - p];
+
+			usz	start_offset = ranges[i];
+			usz	end_offset   = ranges[i + 1];
+
+			csort(list, low + start_offset, low + end_offset, key_fn, byte_idx - 1);
+		}
+	}
+}
--- a/lib/std/sort/insertionsort.c3
+++ b/lib/std/sort/insertionsort.c3
@@ -0,0 +1,65 @@
+module std::sort;
+import std::sort::is;
+
+/**
+ * Sort list using the quick sort algorithm.
+ * @require @is_sortable(list) "The list must be indexable and support .len or .len()"
+ * @require @is_valid_cmp_fn(cmp, list, context) "Expected a comparison function which compares values"
+ **/
+macro insertionsort(list, cmp = EMPTY_MACRO_SLOT, context = EMPTY_MACRO_SLOT) @builtin
+{
+	usz len = sort::@len_from_list(list);
+	is::isort(<$typeof(list), $typeof(cmp), $typeof(context)>)(list, 0, (isz)len, cmp, context);
+}
+
+module std::sort::is(<Type, CmpFn, Context>);
+
+def ElementType = $typeof(Type{}[0]);
+
+fn void isort(Type list, usz low, usz high, CmpFn comp, Context context)
+{
+	var $has_cmp = @is_valid_macro_slot(comp);
+	var $has_context = @is_valid_macro_slot(context);
+	var $cmp_by_value = $has_cmp &&& $assignable(list[0], $typefrom(CmpFn.params[0]));
+	var $has_get_ref =  $defined(&list[0]);
+	for (usz i = low; i < high; ++i)
+	{
+		usz j = i;
+		for (;j > low;)
+		{
+			$if $has_get_ref:
+				ElementType *rhs = &list[j];
+				ElementType *lhs = &list[--j];
+				$switch
+					$case $cmp_by_value && $has_context:
+						if (comp(*rhs, *lhs, context) >= 0) break;
+					$case $cmp_by_value:
+						if (comp(*rhs, *lhs) >= 0) break;
+					$case $has_cmp && $has_context:
+						if (comp(rhs, lhs, context) >= 0) break;
+					$case $has_cmp:
+						if (comp(rhs, lhs) >= 0) break;
+					$default:
+						if (!less(*rhs, *lhs)) break;
+				$endswitch
+				@swap(*rhs, *lhs);
+			$else
+				usz r = j;
+				--j;
+				$switch
+					$case $cmp_by_value && $has_context:
+						if (comp(list[r], list[j], context) >= 0) break;
+					$case $cmp_by_value:
+						if (comp(list[r], list[j]) >= 0) break;
+					$case $has_cmp && $has_context:
+						if (comp(&list[r], &list[j], context) >= 0) break;
+					$case $has_cmp:
+						if (comp(&list[r], &list[j]) >= 0) break;
+					$default:
+						if (!less(list[r], list[j])) break;
+				$endswitch
+				@swap(list[r], list[j]);
+			$endif
+		}
+	}
+}
--- a/lib/std/sort/quicksort.c3
+++ b/lib/std/sort/quicksort.c3
@@ -3,18 +3,17 @@ import std::sort::qs;

 /**
 * Sort list using the quick sort algorithm.
- * @require $defined(list[0]) && $defined(list.len) "The list must be indexable and support .len or .len()"
- * @require $or(@typeid(cmp) == void*.typeid, @is_comparer(cmp, list)) "Expected a comparison function which compares values"
+ * @require @is_sortable(list) "The list must be indexable and support .len or .len()"
+ * @require @is_valid_cmp_fn(cmp, list, context) "Expected a comparison function which compares values"
+ * @require @is_valid_context(cmp, context) "Expected a valid context"
 **/
-macro quicksort(list, cmp = null) @builtin
+macro quicksort(list, cmp = EMPTY_MACRO_SLOT, context = EMPTY_MACRO_SLOT) @builtin
 {
-	var $Type = $typeof(list);
-	var $CmpType = $typeof(cmp);
 	usz len = sort::@len_from_list(list);
-	qs::qsort(<$Type, $CmpType>)(list, 0, (isz)len - 1, cmp);
+	qs::qsort(<$typeof(list), $typeof(cmp), $typeof(context)>)(list, 0, (isz)len - 1, cmp, context);
 }

-module std::sort::qs(<Type, Comparer>);
+module std::sort::qs(<Type, CmpFn, Context>);

 def ElementType = $typeof(Type{}[0]);

@@ -28,10 +27,12 @@ def Stack = StackElementItem[64] @private;

 // Based on https://alienryderflex.com/quicksort by Darel Rex Finley, Public Domain.

-fn void qsort(Type list, isz low, isz high, Comparer cmp)
+fn void qsort(Type list, isz low, isz high, CmpFn cmp, Context context)
 {
-	var $no_cmp = Comparer.typeid == void*.typeid;
-	var $cmp_by_value = $and(!$no_cmp, Comparer.params[0] == @typeid(list[0]));
+	var $has_cmp = @is_valid_macro_slot(cmp);
+	var $has_context = @is_valid_macro_slot(context);
+	var $cmp_by_value = $has_cmp &&& $assignable(list[0], $typefrom(CmpFn.params[0]));
+
 	if (low >= 0 && high >= 0 && low < high)
 	{
 		Stack stack;
@@ -51,20 +52,25 @@ fn void qsort(Type list, isz low, isz high, Comparer cmp)
 				while (l < h)
 				{
 					$switch
+						$case $cmp_by_value && $has_context:
+							while (cmp(list[h], pivot, context) >= 0 && l < h) h--;
+		  					if (l < h) list[l++] = list[h];
+							while (cmp(list[l], pivot, context) <= 0 && l < h) l++;
 						$case $cmp_by_value:
 							while (cmp(list[h], pivot) >= 0 && l < h) h--;
-						$case !$no_cmp:
-							while (cmp(&list[h], &pivot) >= 0 && l < h) h--;
-						$default:
-							while (greater_eq(list[h], pivot) && l < h) h--;
-					$endswitch
-					if (l < h) list[l++] = list[h];
-					$switch
-						$case $cmp_by_value:
+		  					if (l < h) list[l++] = list[h];
 							while (cmp(list[l], pivot) <= 0 && l < h) l++;
-						$case !$no_cmp:
+						$case $has_cmp && $has_context:
+							while (cmp(&list[h], &pivot, context) >= 0 && l < h) h--;
+		  					if (l < h) list[l++] = list[h];
+							while (cmp(&list[l], &pivot, context) <= 0 && l < h) l++;
+						$case $has_cmp:
+							while (cmp(&list[h], &pivot) >= 0 && l < h) h--;
+		  					if (l < h) list[l++] = list[h];
 							while (cmp(&list[l], &pivot) <= 0 && l < h) l++;
 						$default:
+							while (greater_eq(list[h], pivot) && l < h) h--;
+		  					if (l < h) list[l++] = list[h];
 							while (less_eq(list[l], pivot) && l < h) l++;
 					$endswitch
 					if (l < h) list[h--] = list[l];
--- a/lib/std/sort/sort.c3
+++ b/lib/std/sort/sort.c3
@@ -1,6 +1,5 @@
 module std::sort;

-
 macro usz @len_from_list(&list)
 {
 	$if $defined(list.len()):
@@ -10,24 +9,48 @@ macro usz @len_from_list(&list)
 	$endif
 }

-macro bool @is_comparer(#cmp, #list)
+macro bool @is_sortable(#list)
 {
-	var $params = $typeof(#cmp).params;
-	$if $params.len != 2:
-		return false;
-	$else
-		$if $params[0] != $params[1]:
+	$switch
+		$case !$defined(#list[0]):
 			return false;
-		$else
-			var $element = @typeid(#list[0]);
-			$switch
-				$case $element == $params[0]:
-					return true;
-				$case $and($params[0].kindof == POINTER, $params[0].inner == $element):
-					return true;
-				$default:
-					return false;
-			$endswitch
-		$endif
-	$endif
+		$case !$defined(#list.len):
+			return false;
+		$case $defined(&#list[0]) &&& !types::is_same($typeof(&#list[0]), $typeof(#list[0])*):
+			return false;
+		$default:
+			return true;
+	$endswitch
+}
+
+macro bool @is_valid_context(#cmp, #context)
+{
+	return @is_valid_macro_slot(#cmp) || @is_empty_macro_slot(#context);
+}
+
+macro bool @is_valid_cmp_fn(#cmp, #list, #context)
+{
+	var $Type = $typeof(#cmp);
+	var $no_context = @is_empty_macro_slot(#context);
+	$switch
+		$case @is_empty_macro_slot(#cmp): return true;
+	    $case $Type.kindof != FUNC ||| $Type.returns.kindof != SIGNED_INT: return false;
+		$case $defined(#cmp(#list[0], #list[0], #context)): return true;
+		$case $defined(#cmp(#list[0], #list[0])): return $no_context;
+		$case $defined(#cmp(&#list[0], &#list[0], #context)): return true;
+		$case $defined(#cmp(&#list[0], &#list[0])): return  $no_context;
+		$default: return false;
+	$endswitch
+}
+
+macro bool @is_cmp_key_fn(#key_fn, #list)
+{
+	$switch
+		$case @is_empty_macro_slot(#key_fn): return true;
+	    $case $typeof(#key_fn).kindof != FUNC: return false;
+	    $case $typeof(#key_fn).returns.kindof != UNSIGNED_INT: return false;
+		$case $defined(#key_fn(#list[0])): return true;
+		$case $defined(#key_fn(&&(#list[0]))): return true;
+		$default: return false;
+	$endswitch
 }
--- a/lib/std/threads/os/thread_posix.c3
+++ b/lib/std/threads/os/thread_posix.c3
@@ -62,7 +62,7 @@ fn void! NativeMutex.lock_timeout(&self, ulong ms)
 	{
 		if (!ms) break;
 		ulong sleep = min(5, ms);
-		if (!libc::nanosleep(&& TimeSpec { .s = 0, .ns = (CLong)sleep * 1000_000 }, null)) return ThreadFault.LOCK_FAILED?;
+		if (!libc::nanosleep(&&time::ms(ms).to_timespec(), null)) return ThreadFault.LOCK_FAILED?;
 		ms -= sleep;
 	}
 	switch (result)
@@ -128,8 +128,9 @@ fn void! NativeConditionVariable.wait_timeout(&cond, NativeMutex* mtx, ulong ms)
 {
 	TimeSpec now;
 	if (libc::timespec_get(&now, libc::TIME_UTC) != libc::TIME_UTC) return ThreadFault.WAIT_FAILED?;
-	now.s += (Time_t)(ms / 1000);
 	now.ns += (CLong)((ms % 1000) * 1000_000);
+	now.s += (Time_t)(ms / 1000 + now.ns / 1000_000_000);
+	now.ns = now.ns % 1000_000_000;
 	switch (posix::pthread_cond_timedwait(cond, &mtx.mutex, &now))
 	{
 		case errno::ETIMEDOUT:
--- a/lib/std/threads/os/thread_win32.c3
+++ b/lib/std/threads/os/thread_win32.c3
@@ -90,8 +90,9 @@ fn void! NativeMutex.lock(&mtx)
 /**
 * @require mtx.timed "Only available for timed locks"
 **/
-fn void! NativeMutex.lock_timeout(&mtx, usz ms)
+fn void! NativeMutex.lock_timeout(&mtx, ulong ms)
 {
+	if (ms > uint.max) ms = uint.max;
 	switch (win32::waitForSingleObject(mtx.handle, (uint)ms))
 	{
 		case win32::WAIT_OBJECT_0:
@@ -244,9 +245,10 @@ fn void! NativeConditionVariable.wait(&cond, NativeMutex* mtx) @inline
 	return timedwait(cond, mtx, win32::INFINITE) @inline;
 }

-fn void! NativeConditionVariable.wait_timeout(&cond, NativeMutex* mtx, uint time) @inline
+fn void! NativeConditionVariable.wait_timeout(&cond, NativeMutex* mtx, ulong ms) @inline
 {
-	return timedwait(cond, mtx, time) @inline;
+	if (ms > uint.max) ms = uint.max;
+	return timedwait(cond, mtx, (uint)ms) @inline;
 }

 fn void! NativeThread.create(&thread, ThreadFn func, void* args)
--- a/lib/std/threads/thread.c3
+++ b/lib/std/threads/thread.c3
@@ -53,9 +53,9 @@ macro void! ConditionVariable.wait(&cond, Mutex* mutex)
 {
 	return NativeConditionVariable.wait((NativeConditionVariable*)cond, (NativeMutex*)mutex);
 }
-macro void! ConditionVariable.wait_timeout(&cond, Mutex* mutex, ulong timeout)
+macro void! ConditionVariable.wait_timeout(&cond, Mutex* mutex, ulong ms)
 {
-	return NativeConditionVariable.wait_timeout((NativeConditionVariable*)cond, (NativeMutex*)mutex, timeout);
+	return NativeConditionVariable.wait_timeout((NativeConditionVariable*)cond, (NativeMutex*)mutex, ms);
 }


--- a/lib/std/time/os/time_win32.c3
+++ b/lib/std/time/os/time_win32.c3
@@ -1,5 +1,6 @@
 module std::time::os @if(env::WIN32);
 import std::os::win32;
+import std::math;

 extern fn void win32_GetSystemTimeAsFileTime(Win32_FILETIME* time) @extern("GetSystemTimeAsFileTime");
 extern fn Win32_BOOL win32_QueryPerformanceFrequency(Win32_LARGE_INTEGER* lpFrequency) @extern("QueryPerformanceFrequency");
@@ -8,16 +9,19 @@ extern fn Win32_BOOL win32_QueryPerformanceCounter(Win32_LARGE_INTEGER* lpPerfor
 const ulong WINDOWS_TICK_US @local = 10;
 const ulong WIN_TO_UNIX_EPOCH_US @local = 116444736000000000u64 / WINDOWS_TICK_US;

+
 fn Clock native_clock()
 {
 	static Win32_LARGE_INTEGER freq;
+	static ulong div = 0;
+	ulong mult = 0;
 	if (!freq.quadPart)
 	{
 		if (!win32_QueryPerformanceFrequency(&freq)) return 0;
 	}
 	Win32_LARGE_INTEGER counter @noinit;
 	if (!win32_QueryPerformanceCounter(&counter)) return 0;
-	return (Clock)counter.quadPart;
+	return (Clock)counter.quadPart.muldiv(1_000_000_000, freq.quadPart);
 }

 fn Time native_timestamp()
--- a/lib/std/time/time.c3
+++ b/lib/std/time/time.c3
@@ -6,6 +6,7 @@ distinct Duration = long;
 distinct Clock = ulong;
 distinct NanoDuration (Printable) = long;

+const Duration US = 1;
 const Duration MS = 1_000;
 const Duration SEC = 1_000_000;
 const Duration MIN = 60 * SEC;
@@ -15,6 +16,7 @@ const Duration WEEK = 7 * DAY;
 const Duration MONTH = 30 * WEEK;
 const Duration YEAR = 36525 * DAY / 100;

+fn Duration us(long l) @inline => (Duration)l * US;
 fn Duration ms(long l) @inline => (Duration)l * MS;
 fn Duration sec(long l) @inline => (Duration)l * SEC;
 fn Duration min(long l) @inline => (Duration)l * MIN;
--- a/msvc_build_libraries.py
+++ b/msvc_build_libraries.py
@@ -10,15 +10,26 @@ import json
 import shutil
 import hashlib
 import zipfile
-import tempfile
 import argparse
 import subprocess
 import urllib.request
+import os
+import ssl
+import tempfile
 from pathlib import Path

-OUTPUT = Path("msvc_temp") # output folder
+if (platform.system() == "Windows"):
+  print("Creating msvc_sdk for compilation without VS.")
+else:
+  print("Creating msvc_sdk for cross platform compilation to Windows.")
+
+OUTPUT = Path(tempfile.mkdtemp()) # output folder
 SDK_OUTPUT = Path("msvc_sdk")

+if (not os.environ.get('PYTHONHTTPSVERIFY', '') and
+        getattr(ssl, '_create_unverified_context', None)):
+  ssl._create_default_https_context = ssl._create_unverified_context
+
 MANIFEST_URL = "https://aka.ms/vs/17/release/channel"

 def download(url):
@@ -57,7 +68,6 @@ def get_msi_cabs(msi):

 def first(items, cond):
  return next(item for item in items if cond(item))
-  

 ### parse command-line arguments

@@ -135,9 +145,7 @@ if not args.accept_license:
  if not accept or accept[0].lower() != "y":
    exit(0)

-shutil.rmtree(OUTPUT, ignore_errors = True)
 shutil.rmtree(SDK_OUTPUT, ignore_errors = True)
-OUTPUT.mkdir()
 total_download = 0

 ### download Windows SDK
@@ -157,7 +165,7 @@ for arch in archs:
  msvc_packages.append(f"microsoft.vc.{msvc_ver}.crt.{arch}.desktop.base")
  msvc_packages.append(f"microsoft.vc.{msvc_ver}.crt.{arch}.store.base")
  msvc_packages.append(f"microsoft.vc.{msvc_ver}.asan.{arch}.base")
-  
+
 for pkg in msvc_packages:
  p = first(packages[pkg], lambda p: p.get("language") in (None, "en-US"))
  for payload in p["payloads"]:
@@ -226,15 +234,10 @@ lib = list((OUTPUT / "VC/Tools/MSVC/").glob("*/lib"))[0]

 SDK_OUTPUT.mkdir(exist_ok=True)

-
-
 for arch in archs:
  out_dir = SDK_OUTPUT / arch
  shutil.copytree(ucrt / arch, out_dir, dirs_exist_ok=True)
-  shutil.copytree(um / arch, out_dir, dirs_exist_ok=True)  
+  shutil.copytree(um / arch, out_dir, dirs_exist_ok=True)
  shutil.copytree(lib / arch, out_dir, dirs_exist_ok=True)

-### cleanup
-
-shutil.rmtree(OUTPUT, ignore_errors=True)
-
+print("Congratulations! The 'msvc_sdk' directory was successfully generated.")
--- a/releasenotes.md
+++ b/releasenotes.md
@@ -1,5 +1,169 @@
 # C3C Release Notes

+## 0.6.2 Change list
+
+### Changes / improvements
+
+- Updated LLVM passes
+- Added `is_substruct` type property.
+- Scalar -> vector not implicit in call or assign.
+- Added `--vector-conv` to enable the old scalar->vector conversion behaviour.
+- Added "weak" type aliases `def Foo = my_foo::Foo @weak;`
+- `*-add` keys in targets in `manifest.json` and `project.json` are deprecated.
+- Made "add" the default for things like `sources`, `dependencies` and other keys in project and library files.
+- Give some symbol name suggestions when the path is matched.
+- Don't generate .o files on `compile` and `compile-run` if there is no `main`.
+- c3c init-lib does not create the directory with the .c3l suffix #1253
+- Permit foreach values to be optional.
+- Add `--show-backtrace` option to disable backtrace for even smaller binary.
+- Untested Xtensa support.
+- && doesn't work correctly with lambdas #1279.
+- Fix incorrect override of optimization levels when using projects.
+- Add experimental `@noalias` attribute.
+- Add a `--run-once` option to delete the output file after running it.
+- Add `@const` attribute for macros, for better error messages with constant macros.
+- Add `wincrt` setting to libraries.
+- Add `+++` `&&&` `|||` as replacement for `$concat`, `$and` and `$or`.
+- Add `methodsof` to type info for struct, union and bitstruct.
+- Added `@tag` `tagof` and `has_tagof` to user defined types and members.
+- Added `c-include-dirs` project/manifest setting.
+- The compiler now skips UTF8 BOM.
+- Printable values passed to the Formatter as pointers, will print as if passed by value.
+- Pointers are rendered with "0x" prefix when passed to '%s'.
+- Add temp allocator scribble.
+- Use PIC by default on Linux.
+- `$exec` may now provide a stdin parameter.
+- Introduce `$vaarg[...]` syntax and deprecate the old `$vaarg(...)`.
+- Similar change to `$vasplat`: `$vasplat` and `$vasplat[1..]`.
+- Add `$member.get(value)` to replace `value.$eval($member.nameof)`
+
+### Fixes
+
+- Broken WASM library code.
+- Regression: Invalid is_random implementation due to changes in 0.6.
+- `dbghelp.lib` was linked even on nolibc on Windows.
+- Fix incorrect linker selection on some platforms.
+- Struct members declared in a single line declaration were not sharing attributes. #1266
+- `opt` project setting now properly documented.
+- Incorrect justify formatting of integers.
+- Assertion with duplicate function pointer signatures #1286
+- Distinct func type would not accept direct function address assign. #1287
+- Distinct inline would not implement protocol if the inlined implemented it. #1292
+- Distinct inline can now be called if it is aliasing a function pointer.
+- Bug in List add_array when reserving memory.
+- Fix issue where a compile time parameter is followed by "...".
+- Fix issue with some conversions to untyped list.
+- Issue where a `if (catch e = ...)` in a defer would be incorrectly copied. Causing codegen error.
+- Variable in if-try / if-catch cannot be a reused variable name.
+- Vararg interfaces were broken.
+- LLVM codegen for constants in enums could fail.
+- Fixes to the socket functions.
+- Improved output when pointer is out of range.
+- Better error when casting to a distinct fails.
+- With single module, name the .o file after what `-o` provides. #1306
+- Bitstruct members can now have attributes.
+- `%` analysis was incorrect for int vectors.
+- When resolving inherited interfaces, the interface type wasn't always resolved.
+- Fix issues when checking methods and interfaces hasn't been resolved yet.
+- Fix Vec2.angle
+- Update to libc::setjmp on Win32, to do no stack unwinding.
+- Recursively follow interfaces when looking up method.
+- Int128 alignment change in LLVM fixed on x64.
+- Fix interface lazy resolution errors.
+- Interface resolution when part of generics #1348.
+- Assert not properly traced #1354.
+- Ordering issues with `$include` / `$exec` fixed #1302.
+- Issues with wincrt linking.
+- Debug info with recursive canonical type usage could cause segfault.
+- Missing check on optional left hand side for `s.x`.
+- Incorrect zero analysis on `foo["test"] = {}` #1360.
+- Bug converting untyped list #1360.
+- Benchmark / test no longer suppresses debug info. #1364.
+- Bug when compile time subtracting a distinct type.
+- `insert_at` incorrectly prevented inserts at the end of a list.
+- Fix aligned alloc for Win32 targets.
+
+### Stdlib changes
+
+- `send` and `recv` added to `libc` for Posix / Win32.
+- Add support to destroy temp allocators.
+- Deprecated `path.append`, `path.tappend`, `getcwd`, `tgetcwd`, `path.absolute`, `ls`.
+- Deprecated `env::get_config_dir`, replaced by `env::new_get_config_dir`.
+- Added `path.has_extension`, `path.new_append`, `path.temp_append`, `new_cwd`, `temp_cwd`, `path.new_absolute`, `new_ls`, `temp_ls`.
+- Added `dstring.replace`
+- New hashmap type, `Map`
+- Added `ElasticArray`.
+
+## 0.6.1 Change list
+
+### Changes / improvements
+- Addition of $append and $concat functions.
+- Added $$str_hash, $$str_upper, $$str_lower, $$str_find builtins.
+- Improved error notes when call expressions have errors.
+- Trailing body arguments may now be `&ref`, `#hash`, `$const` and `$Type` arguments.
+- "panic-msg" setting to suppress panic message output.
+- Require `@export` functions to have `@export` types.
+- Disallow leading/trailing/duplicate '_' in module names.
+- Updated mangling.
+- Added `$$unaligned_load` and `$$unaligned_store`.
+- `--no-headers` option to suppress creating headers when generating a library.
+- Support c-file compilation in libraries.
+- Allow using $defined(&a[1]) to check if the operation is supported.
+- Max number of members in a struct is limited to 65535.
+- The maximum number of parameters in a call is now 255, up from 127.
+- Array comparison now uses built-in memcmp on LLVM to enable optimizations.
+- Prevent implicit array casts to pointers with higher alignment #1237.
+- Macro `$case` statements now pick the first match and does not evaluate the rest.
+- `manifest.json` is now checked for incorrect keys.
+- Added `--list-manifest-properties` to list the available properties in `manifest.json`.
+- Indexing into a constant array / struct now works at compile time.
+- Improved error message when trying user foreach with an untyped list.
+
+### Fixes
+- Error with unsigned compare in `@ensure` when early returning 0 #1207.
+- Prevent Mach-O from removing `@init` and `@dynamic` in a more reliable way #1200.
+- Fix of missing copy of parameterized custom attributes.
+- Fixed crash on certain recursive function definitions #1209.
+- Return the typekind "FUNC" for a function pointer.
+- No longer possible to dereference a function pointer.
+- Fix bug with @jump miscompile.
+- Bit negate does implicit integer promotion.
+- Bitstructs, unions and flexible arrays now correctly emitted in headers.
+- Fix distinct inline conversions.
+- Bit negating const zero flags would give an incorrect result.
+- Fix to scalar -> vector conversions.
+- Bug fix for rethrow + defer catch. 
+- Wrong size for structs containing overaligned structs #1219
+- $typeof(*x) should be valid when x is an `[out]` parameter #1226
+- Fix ABI lowering for 128 bit vectors on Linux.
+- Bad error message when using a generic method without generic parameters #1228
+- Private function called from nested macro not visible to linker #1232
+- Bitstructs in structs would not be correctly be handled in some cases.
+- Fix problem where a $$FUNC would return "<GLOBAL>" when evaluated for a static in a function #1236.
+- `ordinal` is no longer a valid associated value name for enums.
+- Constants defined by indexing into another constant could fail codegen.
+- Stdlib nolibc code bugs fixed.
+- Regression: duplicate symbols with static variable declared in macro #1248.
+- Unsplat with named parameters was accidentally disallowed.
+- Reference parameter doesn't work with vector subscript #1250.
+- The msvc_sdk script failed to work properly on windows when run in folders with spaces.
+- Using winmain would call the wrong definition #1265.
+- DynamicArenaAllocator would not correctly free.
+
+### Stdlib changes
+- Added `remove_first_item` `remove_last_item` and `remove_item` as aliases for the `match` functions.
+- Added @str_hash, @str_upper, @str_lower, @str_find compile time macros.
+- Remove "panic" text from unreachable() when safe mode is turned off.
+- Added `@unaligned_store` and `@unaligned_load`.
+- Null ZString, DString or pointer prints "(null)" for printf.
+- Updated sorting API.
+- Insertion sort and counting sort added.
+- Added missing `mem` and `mem::allocator` functions for aligned allocations.
+- Added `new_init_with_array` and `temp_init_with_array` for List.
+- Fixed posix `NativeMutex.lock_timeout`.
+- Fixed `env::ARCH_32_BIT` and `env::ARCH_64_BIT`.
+- Added `time::us`.
+
 ## 0.6.0 Change list

 ### Changes / improvements
@@ -25,6 +189,12 @@
 - Introduce MSVC compatible SIMD ABI.
 - `$foreach` doesn't create an implicit syntactic scope.
 - Error of `@if` depends on `@if`
+- Support `defer (catch err)`
+- Added `print-input` command argument to print all files used for compilation
+- Allow recursive function definitions as long as they are pointers. #1182
+- Default CPU to native if less than AVX, otherwise use AVX.
+- Bounds checking on length for `foo[1:2]` slicing #1191.
+- Foreach uses non-wrapping add/dec.

 ### Fixes
 - Fixed issue in safe mode when converting enums.
@@ -34,30 +204,6 @@
 - Fix problems using reflection on interface types #1203.
 - `@param` with unnamed macro varargs could crash the compiler. 
 - Compiler crash using enum nameof from different module #1205.
-
-### Stdlib changes
- "init_new/init_temp" removed. 
- LinkedList API rewritten. 
- List "pop" and "remove" function now return Optionals. 
- RingBuffer API rewritten. Allocator interface changed. 
- Deprecated Allocator, DString and mem functions removed. 
- "identity" functions are now constants for Matrix and Complex numbers.
- Removed 'append' from Object and List, replaced by 'push'.
- `GenericList` renamed `AnyList`.
- Proper handling of '.' and Win32 '//server' paths.
- Path normalization - fix possible null terminator out of bounds.
-
-## 0.5.6 Change list
-
-### Changes / improvements
- Support `defer (catch err)`
- Added `print-input` command argument to print all files used for compilation
- Allow recursive function definitions as long as they are pointers. #1182
- Default CPU to native if less than AVX, otherwise use AVX.
- Bounds checking on length for `foo[1:2]` slicing #1191.
- Foreach uses non-wrapping add/dec.
-
-### Fixes
 - Incorrect length passed to scratch buffer printf.
 - Casting to a bitstruct would be allowed even if the type was the wrong size.
 - Generic modules parameterized with constants would sometimes get the wrong parameterized module name causing conversion errors #1192.
@@ -71,6 +217,16 @@
 - Compiler crash on designated initializer for structs with bitstruct.

 ### Stdlib changes
+- "init_new/init_temp" removed. 
+- LinkedList API rewritten. 
+- List "pop" and "remove" function now return Optionals. 
+- RingBuffer API rewritten. Allocator interface changed. 
+- Deprecated Allocator, DString and mem functions removed. 
+- "identity" functions are now constants for Matrix and Complex numbers.
+- Removed 'append' from Object and List, replaced by 'push'.
+- `GenericList` renamed `AnyList`.
+- Proper handling of '.' and Win32 '//server' paths.
+- Path normalization - fix possible null terminator out of bounds.
 - Add 'zstr' variants for `string::new_format` / `string::tformat`.
 - Fix mutex and wait signatures for Win32.

--- a/resources/examples/args.c3
+++ b/resources/examples/args.c3
@@ -0,0 +1,6 @@
+import std::io;
+
+fn void main(String[] args)
+{
+    io::printn(args);
+}
--- a/resources/examples/contextfree/dynscope.c3
+++ b/resources/examples/contextfree/dynscope.c3
@@ -19,7 +19,7 @@ macro @with_mode(String user, #action, ...)
 	@scope(context_user)
 	{
 		context_user = user;
-		return #action($vasplat());
+		return #action($vasplat);
 	};
 }

--- a/resources/examples/embedded/riscv-qemu/Makefile
+++ b/resources/examples/embedded/riscv-qemu/Makefile
@@ -0,0 +1,21 @@
+SRCS_C3 := $(wildcard *.c3)
+
+default: hello.elf
+
+hello.a: $(SRCS_C3)
+	$(C3C_PATH)c3c -g --use-stdlib=no --no-entry --target elf-riscv32 static-lib $(SRCS_C3)
+
+start.o: start.s
+	riscv64-unknown-elf-as -g -march=rv32i -mabi=ilp32 -misa-spec=20191213 -o start.o start.s
+
+hello.elf: hello.a start.o baremetal.ld
+	riscv64-unknown-elf-ld -T baremetal.ld -m elf32lriscv -o hello.elf hello.a start.o
+
+run: hello.elf
+	qemu-system-riscv32 -nographic -serial mon:stdio -machine virt -semihosting -bios hello.elf
+
+debug: hello.elf
+	qemu-system-riscv32 -nographic -serial mon:stdio -machine virt -semihosting -s -S -bios hello.elf
+
+clean:
+	rm -f *.o *.a hello.elf
--- a/resources/examples/embedded/riscv-qemu/README.md
+++ b/resources/examples/embedded/riscv-qemu/README.md
@@ -0,0 +1,8 @@
+# Risc-V 32 Embedded Example With QEMU
+## Prereqs
+- QEMU
+- Risc-V toolchain
+- C3C
+- Make
+## Running
+`make run`
--- a/resources/examples/embedded/riscv-qemu/baremetal.ld
+++ b/resources/examples/embedded/riscv-qemu/baremetal.ld
@@ -0,0 +1,14 @@
+EXTERN(main)
+
+SECTIONS
+{
+  . = 0x80000000;													/* QEMU default load address to run bios */
+  .text : {
+		KEEP(*(.text._start));								/* Ensure _start is placed first */
+		*(.text*);														/* Program code here */
+	}
+	. = ALIGN (CONSTANT (COMMONPAGESIZE));	/* Make sure linker does not jam data into text section, making text writable */
+  .data : { 
+		*(.data*)															/* Stack goes here */
+	}
+}
--- a/resources/examples/embedded/riscv-qemu/hello.c3
+++ b/resources/examples/embedded/riscv-qemu/hello.c3
@@ -0,0 +1,11 @@
+import uart;
+import semihost;
+
+const UART0_BASE = 0x10000000;
+
+fn void main() @export("main") {
+  Uart* uart0 = (Uart*)UART0_BASE;               // Create pointer to UART 0
+	uart0.fcr = uart::UARTFCR_FFENA;               // Enable FIFO
+  uart0.puts("Hello World!\n");                  // Write the string to the UART
+  semihost::exit(0);                             // Semihosting call to exit host
+}
--- a/resources/examples/embedded/riscv-qemu/semihost.c3
+++ b/resources/examples/embedded/riscv-qemu/semihost.c3
@@ -0,0 +1,20 @@
+module semihost;
+
+// See: https://github.com/ARM-software/abi-aa/blob/main/semihosting/semihosting.rst#sys-exit-extended-0x20
+
+extern fn int sys_semihost(int operation, SemihostParameters* parms);
+
+struct SemihostParameters {
+	int field1;
+	int field2;
+}
+
+const int SYS_EXIT_EXTENDED = 0x20;
+const int ADP_STOPPED_APPLICATIONEXIT = 0x20026;
+
+fn void exit(int status) {
+	SemihostParameters parms;
+	parms.field1 = ADP_STOPPED_APPLICATIONEXIT;
+	parms.field2 = status;
+	sys_semihost(SYS_EXIT_EXTENDED, &parms);
+}
--- a/resources/examples/embedded/riscv-qemu/start.s
+++ b/resources/examples/embedded/riscv-qemu/start.s
@@ -0,0 +1,29 @@
+# Simple C runtime startup bootstrap
+# Two primary functions:
+# - Stack allocation and initializing stack pointer
+# - Jumping to main
+
+.section .text._start
+.global _start
+_start:
+  la sp, __stack_top      # Load the stack pointer
+  add s0, sp, zero        # Set the frame pointer
+  jal zero, main          # Run main entry point - no argc
+loop:	j loop              # Spin forever in case main returns
+
+# Support semi-hosting calls
+.option norvc
+.text
+.balign 16
+.global sys_semihost
+.type sys_semihost @function
+sys_semihost:             # https://github.com/riscv-non-isa/riscv-semihosting/blob/main/src/binary-interface.adoc
+  slli zero, zero, 0x1f
+  ebreak
+  srai zero, zero, 0x7
+  ret
+
+.section .data
+.space 1024*8             # allocate 8K of memory to serve as initial stack
+.align 16                 # Smallest stack allocation is 16 bytes, so align accordingly
+__stack_top:              # The stack grows downward according the Risc-V ABI
--- a/resources/examples/embedded/riscv-qemu/uart.c3
+++ b/resources/examples/embedded/riscv-qemu/uart.c3
@@ -0,0 +1,28 @@
+module uart;
+
+const UARTFCR_FFENA = 0x01;                  // UART FIFO Control Register enable bit
+const UARTLSR_THRE = 0x20;                   // UART Line Status Register Transmit Hold Register Empty bit
+
+struct Uart {
+	char dr;                                   // UART Data Register
+	char filler1;
+	char fcr;                                  // FIFO Control Register
+	char filler2;
+	char filler3;
+	char lsr;                                  // Line Status Register
+}
+
+fn bool Uart.uart_ff_thr_empty(Uart* this) {
+	return (bool)($$volatile_load(&this.lsr) & UARTLSR_THRE);
+}
+
+fn void Uart.putc(Uart* this, char c) {
+  while (!this.uart_ff_thr_empty());         // Wait until the FIFO holding register is empty
+  $$volatile_store(&this.dr, c);             // Write character to transmit register
+}
+
+fn void Uart.puts(Uart* this, char *str) {
+  while (*str) {                             // Loop until value at string pointer is zero
+    this.putc(*str++);                       // Write the character and increment pointer
+  }
+}
--- a/resources/examples/project_all_settings.json
+++ b/resources/examples/project_all_settings.json
@@ -16,6 +16,8 @@
  // C sources if the project also compiles C sources
  // relative to the project file.
  // "c-sources": [ "csource/**" ],
+  // Include directories for C sources relative to the project file.
+  // "c-include-dirs: [ "csource/include" ],
  // Output location, relative to project file.
  "output": "../build",
  // Architecture and OS target.
--- a/resources/grammar/c3.l
+++ b/resources/grammar/c3.l
@@ -40,7 +40,6 @@ int comment_level = 0;


 "$alignof"      { count(); return(CT_ALIGNOF); }
-"$and"          { count(); return(CT_AND); }
 "$assert"       { count(); return(CT_ASSERT); }
 "$assignable"   { count(); return(CT_ASSIGNABLE); }
 "$case"         { count(); return(CT_CASE); }
@@ -55,6 +54,7 @@ int comment_level = 0;
 "$error"        { count(); return(CT_ERROR); }
 "$eval"         { count(); return(CT_EVAL); }
 "$evaltype"     { count(); return(CT_EVALTYPE); }
+"$exec"         { count(); return(CT_EXEC); }
 "$extnameof"    { count(); return(CT_EXTNAMEOF); }
 "$feature"      { count(); return(CT_FEATURE); }
 "$for"          { count(); return(CT_FOR); }
@@ -195,6 +195,9 @@ b64\`{B64}\` { count(); return(BYTES); }
 "!!"			{ count(); return(BANGBANG); }
 "..."			{ count(); return(ELLIPSIS); }
 ".."			{ count(); return(DOTDOT); }
+"&&&"           { count(); return(CT_AND_OP); }
+"|||"           { count(); return(CT_OR_OP); }
+"+++"           { count(); return(CT_CONCAT_OP); }
 ">>="			{ count(); return(SHR_ASSIGN); }
 "<<="			{ count(); return(SHL_ASSIGN); }
 "+="			{ count(); return(ADD_ASSIGN); }
--- a/resources/grammar/grammar.y
+++ b/resources/grammar/grammar.y
@@ -14,6 +14,7 @@ void yyerror(const char *s);
 %token TYPE_IDENT CT_TYPE_IDENT
 %token AT_TYPE_IDENT AT_IDENT CT_INCLUDE
 %token STRING_LITERAL INTEGER
+%token CT_AND_OP CT_OR_OP CT_CONCAT_OP CT_EXEC
 %token INC_OP DEC_OP SHL_OP SHR_OP LE_OP GE_OP EQ_OP NE_OP
 %token AND_OP OR_OP MUL_ASSIGN DIV_ASSIGN MOD_ASSIGN ADD_ASSIGN
 %token LGENPAR RGENPAR
@@ -90,7 +91,7 @@ ct_analyse
 	| CT_IS_CONST
 	;

-ct_arg
+ct_vaarg
 	: CT_VACONST
 	| CT_VAARG
 	| CT_VAREF
@@ -146,11 +147,10 @@ base_expr_assignable
 	| '(' expr ')'
 	| expr_block
 	| ct_call '(' flat_path ')'
-	| ct_arg '(' expr ')'
+	| ct_vaarg '[' expr ']'
 	| ct_analyse '(' expression_list ')'
 	| CT_VACOUNT
 	| CT_FEATURE '(' CONST_IDENT ')'
-	| CT_AND '(' expression_list ')'
 	| ct_castable '(' expr ',' type ')'
 	| lambda_decl compound_statement
 	;
@@ -333,21 +333,25 @@ try_chain_expr
 and_expr
 	: relational_expr
 	| and_expr AND_OP relational_expr
+	| and_expr CT_AND_OP relational_expr
 	;

 and_stmt_expr
 	: relational_stmt_expr
 	| and_stmt_expr AND_OP relational_expr
+	| and_stmt_expr CT_AND_OP relational_expr
 	;

 or_expr
 	: and_expr
 	| or_expr OR_OP and_expr
+	| or_expr CT_OR_OP and_expr
 	;

 or_stmt_expr
 	: and_stmt_expr
 	| or_stmt_expr OR_OP and_expr
+	| or_stmt_expr CT_OR_OP and_expr
 	;

 suffix_expr
@@ -441,11 +445,11 @@ param_path

 arg
 	: param_path '=' expr
+	| param_path
 	| type
 	| param_path '=' type
 	| expr
-	| CT_VASPLAT '(' range_expr ')'
-	| CT_VASPLAT '(' ')'
+	| CT_VASPLAT '[' range_expr ']'
 	| ELLIPSIS expr
 	;

@@ -531,7 +535,7 @@ base_type
 	| CT_TYPE_IDENT
 	| CT_TYPEOF '(' expr ')'
 	| CT_TYPEFROM '(' constant_expr ')'
-	| CT_VATYPE '(' constant_expr ')'
+	| CT_VATYPE '[' constant_expr ']'
 	| CT_EVALTYPE '(' constant_expr ')'
 	;

@@ -885,8 +889,8 @@ opt_stmt_list
 switch_stmt
 	: SWITCH optional_label '{' switch_body '}'
 	| SWITCH optional_label '{' '}'
-	| SWITCH optional_label paren_cond '{' switch_body '}'
-	| SWITCH optional_label paren_cond '{' '}'
+	| SWITCH optional_label paren_cond  opt_attributes '{' switch_body '}'
+	| SWITCH optional_label paren_cond  opt_attributes '{' '}'
 	;

 expression_list
@@ -1232,9 +1236,16 @@ opt_extern
 	| empty
 	;

+exec_decl
+	: CT_EXEC '(' expr ')' opt_attributes ';'
+	| CT_EXEC '(' expr ',' initializer_list ')' opt_attributes ';'
+	| CT_EXEC '(' expr ',' initializer_list ',' expr ')' opt_attributes ';'
+	;
+
 top_level
 	: module
 	| import_decl
+	| exec_decl
 	| opt_extern func_definition
 	| opt_extern const_declaration
 	| opt_extern global_declaration
--- a/resources/testfragments/wasm4.c3
+++ b/resources/testfragments/wasm4.c3
@@ -0,0 +1,143 @@
+// WASM-4: https://wasm4.org/docs
+module w4;
+// ┌───────────────────────────────────────────────────────────────────────────┐
+// │                                                                           │
+// │ Platform Constants                                                        │
+// │                                                                           │
+// └───────────────────────────────────────────────────────────────────────────┘
+
+const SCREEN_SIZE = 160;
+
+// ┌───────────────────────────────────────────────────────────────────────────┐
+// │                                                                           │
+// │ Memory Addresses                                                          │
+// │                                                                           │
+// └───────────────────────────────────────────────────────────────────────────┘
+
+const uint* PALETTE = (void*)0x04;
+const ushort* DRAW_COLORS = (void*)0x14;
+const char* GAMEPAD1 = (void*)0x16;
+const char* GAMEPAD2 = (void*)0x17;
+const char* GAMEPAD3 = (void*)0x18;
+const char* GAMEPAD4 = (void*)0x19;
+const short* MOUSE_X = (void*)0x1a;
+const short* MOUSE_Y = (void*)0x1c;
+const char* MOUSE_BUTTONS = (void*)0x1e;
+const char* SYSTEM_FLAGS = (void*)0x1f;
+const char* NETPLAY = (void*)0x20;
+const char* FRAMEBUFFER = (void*)0xa0;
+
+const BUTTON_1 = 1;
+const BUTTON_2 = 2;
+const BUTTON_LEFT = 16;
+const BUTTON_RIGHT = 32;
+const BUTTON_UP = 64;
+const BUTTON_DOWN = 128;
+
+const MOUSE_LEFT = 1;
+const MOUSE_RIGHT = 2;
+const MOUSE_MIDDLE = 4;
+
+const SYSTEM_PRESERVE_FRAMEBUFFER = 1;
+const SYSTEM_HIDE_GAMEPAD_OVERLAY = 2;
+
+// ┌───────────────────────────────────────────────────────────────────────────┐
+// │                                                                           │
+// │ Drawing Functions                                                         │
+// │                                                                           │
+// └───────────────────────────────────────────────────────────────────────────┘
+
+/* Copies pixels to the framebuffer. */
+extern fn void blit(char* data, int x, int y, uint width, uint height, uint flags) @extern("blit");
+
+/* Copies a subregion within a larger sprite atlas to the framebuffer. */
+extern fn void blit_sub(char* data, int x, int y, uint width, uint height,
+                     uint src_x, uint src_y, uint stride, uint flags) @extern("blitSub");
+
+const BLIT_2BPP = 1;
+const BLIT_1BPP = 0;
+const BLIT_FLIP_X = 2;
+const BLIT_FLIP_Y = 4;
+const BLIT_ROTATE = 8;
+
+/* Draws a line between two points. */
+extern fn void line(int x1, int y1, int x2, int y2);
+
+/* Draws a horizontal line. */
+extern fn void hline(int x, int y, uint len);
+
+/* Draws a vertical line. */
+extern fn void vline(int x, int y, uint len);
+
+/* Draws an oval (or circle). */
+extern fn void oval(int x, int y, uint width, uint height);
+
+/* Draws a rectangle. */
+extern fn void rect(int x, int y, uint width, uint height);
+
+/* Draws text using the built-in system font. */
+extern fn void text(char* text, int x, int y) @extern("text");
+
+// ┌───────────────────────────────────────────────────────────────────────────┐
+// │                                                                           │
+// │ Sound Functions                                                           │
+// │                                                                           │
+// └───────────────────────────────────────────────────────────────────────────┘
+
+/* Plays a sound tone. */
+extern fn void tone(uint frequency, uint duration, uint volume, uint flags);
+
+const TONE_PULSE1 = 0;
+const TONE_PULSE2 = 1;
+const TONE_TRIANGLE = 2;
+const TONE_NOISE = 3;
+const TONE_MODE1 = 0;
+const TONE_MODE2 = 4;
+const TONE_MODE3 = 8;
+const TONE_MODE4 = 12;
+const TONE_PAN_LEFT = 16;
+const TONE_PAN_RIGHT = 32;
+
+// ┌───────────────────────────────────────────────────────────────────────────┐
+// │                                                                           │
+// │ Storage Functions                                                         │
+// │                                                                           │
+// └───────────────────────────────────────────────────────────────────────────┘
+
+/* Reads up to `size` bytes from persistent storage into the pointer `dest`. */
+extern fn uint diskr(void* dest, uint size);
+
+/* Writes up to `size` bytes from the pointer `src` into persistent storage. */
+extern fn uint diskw (void* src, uint size);
+
+/* Prints a message to the debug console. */
+extern fn void trace(char* str);
+
+/* Prints a message to the debug console. */
+extern fn void tracef(char* fmt, ...);
+
+char[8] smiley = {
+	0b11000011,
+	0b10000001,
+	0b00100100,
+	0b00100100,
+	0b00000000,
+	0b00100100,
+	0b10011001,
+	0b11000011,
+};
+
+fn void start() @extern("start")
+{}
+
+fn void update() @extern("update")
+{
+	DRAW_COLORS[0] = 2;
+	text("Hello from C3", 10, 10);
+	if (GAMEPAD1[0] & BUTTON_1)
+	{
+		DRAW_COLORS[0] = 4;
+	}
+	blit(&smiley, 76, 76, 8, 8, BLIT_1BPP);
+    text("Press X to blink", 16, 90);
+}
--- a/resources/testproject/hello_world.c3
+++ b/resources/testproject/hello_world.c3
@@ -1,6 +1,8 @@
 module hello_world;
 import std;
 import bar;
+import clib;
+import clib2;

 fn int test_doubler(int x) @if(env::WIN32) => x * x;
 extern fn int test_doubler(int) @if(!env::WIN32);
@@ -12,6 +14,7 @@ fn int main()
    bar::test();
    printf("Hello double: %d\n", test_doubler(11));
 	if ($feature(ABCD)) io::printn("ABCD");
-
+	clib::hello_from_c();
+	clib2::hello_from_c_zip();
    return 0;
 }
--- a/resources/testproject/lib/clib.c3l/clib.c3i
+++ b/resources/testproject/lib/clib.c3l/clib.c3i
@@ -0,0 +1,3 @@
+module clib;
+
+extern fn void hello_from_c();
--- a/resources/testproject/lib/clib.c3l/hello2.c
+++ b/resources/testproject/lib/clib.c3l/hello2.c
@@ -0,0 +1,5 @@
+#include <stdio.h>
+void hello_from_c(void)
+{
+	puts("Hello from C!");
+}
--- a/resources/testproject/lib/clib.c3l/manifest.json
+++ b/resources/testproject/lib/clib.c3l/manifest.json
@@ -0,0 +1,15 @@
+{ 
+  "provides" : "clib",
+  "c-sources" : ["hello2.c", "whitespace test.c"],
+  "targets" : {
+    "macos-x64" : {
+    },
+    "macos-aarch64" : {},
+    "linux-x64" : {
+      "cflags": "-fPIE"
+    },
+	"windows-x64" : {
+      "c-include-dirs": ["C:\\"]
+    }
+  }
+}
--- a/resources/testproject/lib/clib.c3l/whitespace
+++ b/resources/testproject/lib/clib.c3l/whitespace
@@ -0,0 +1 @@
+#include <stdio.h>
--- a/resources/testproject/lib/clib2.c3l
+++ b/resources/testproject/lib/clib2.c3l
--- a/resources/testproject/project.json
+++ b/resources/testproject/project.json
@@ -11,29 +11,31 @@
  "sources": [
    "./**"
  ],
-  // libraries to use
-  "dependencies": [],
+  "dependency-search-paths": [ "./lib" ],
+  "dependencies": ["clib", "clib2"],

  "features": ["ABCD"],

-  // c compiler
-  "cc": "cc",
  // c sources
  "targets": {
    "hello_world": {
      "type": "executable",
-      "c-sources-override": [
+      "cc" : "cc",
+      "c-sources": [
        "./csource/**"
-      ]
+      ],
+      "reloc": "PIE",
    },
    "hello_world_win32": {
      "type": "executable",
+      "c-include-dirs": [ "C:\\"],
      "c-sources-override": [
      ]
    },
    "hello_world_lib": {
      "type": "static-lib",
-      "c-sources-override": [
+      "cc" : "cc",
+      "c-sources": [
        "./csource/**"
      ]
    },
--- a/src/build/build.h
+++ b/src/build/build.h
@@ -3,12 +3,13 @@
 // Use of this source code is governed by the GNU LGPLv3.0 license
 // a copy of which can be found in the LICENSE file.

-#include "../version.h"
 #include "../utils/lib.h"
+#include "../version.h"
+#include <stdint.h>

-#define MAX_LIB_DIRS 1024
-#define MAX_FILES 2048
-#define MAX_INCLUDES 2048
+#define MAX_BUILD_LIB_DIRS 1024
+#define MAX_COMMAND_LINE_FILES 2048
+#define MAX_COMMAND_LINE_RUN_ARGS 2048
 #define MAX_THREADS 0xFFFF
 #define DEFAULT_SYMTAB_SIZE (256 * 1024)
 #define DEFAULT_SWITCHRANGE_MAX_SIZE (256)
@@ -44,11 +45,19 @@ typedef enum
 	COMMAND_TEST,
 	COMMAND_UNIT_TEST,
 	COMMAND_PRINT_SYNTAX,
+	COMMAND_PROJECT,
 } CompilerCommand;

 typedef enum
 {
-	DIAG_NONE = 0, // Don't use!
+	SUBCOMMAND_MISSING = 0,
+	SUBCOMMAND_VIEW,
+	SUBCOMMAND_ADD
+} ProjectSubcommand;
+
+typedef enum
+{
+	DIAG_NONE = 0,     // Don't use!
 	DIAG_WARNING_TYPE, // Don't use!
 	DIAG_UNUSED,
 	DIAG_UNUSED_PARAMETER,
@@ -124,20 +133,46 @@ typedef enum
 typedef enum
 {
 	OPTIMIZATION_NOT_SET = -1,
-	OPTIMIZATION_NONE = 0,          // -O0
-	OPTIMIZATION_LESS = 1,          // -O1
-	OPTIMIZATION_MORE = 2,          // -O2
-	OPTIMIZATION_AGGRESSIVE = 3,    // -O3
+	OPTIMIZATION_NONE = 0,       // -O0
+	OPTIMIZATION_LESS = 1,       // -O1
+	OPTIMIZATION_MORE = 2,       // -O2
+	OPTIMIZATION_AGGRESSIVE = 3, // -O3
 } OptimizationLevel;

+typedef enum
+{
+	PANIC_NOT_SET = -1,
+	PANIC_OFF = 0,
+	PANIC_ON = 1,
+} PanicLevel;
+
 typedef enum
 {
 	SINGLE_MODULE_NOT_SET = -1,
-	SINGLE_MODULE_OFF = 0,
+	SINGLE_MODULE_OFF = 0, // NOLINT
 	SINGLE_MODULE_ON = 1
 } SingleModule;

+typedef enum
+{
+	UNROLL_LOOPS_NOT_SET = -1,
+	UNROLL_LOOPS_OFF = 0,
+	UNROLL_LOOPS_ON = 1
+} UnrollLoops;

+typedef enum
+{
+	MERGE_FUNCTIONS_NOT_SET = -1,
+	MERGE_FUNCTIONS_OFF = 0,
+	MERGE_FUNCTIONS_ON = 1
+} MergeFunctions;
+
+typedef enum
+{
+	VECTORIZATION_NOT_SET = -1,
+	VECTORIZATION_OFF = 0,
+	VECTORIZATION_ON = 1
+} AutoVectorization;
 typedef enum
 {
 	STRIP_UNUSED_NOT_SET = -1,
@@ -166,12 +201,19 @@ typedef enum
 	USE_STDLIB_ON = 1
 } UseStdlib;

+typedef enum
+{
+	SHOW_BACKTRACE_NOT_SET = -1,
+	SHOW_BACKTRACE_OFF = 0,
+	SHOW_BACKTRACE_ON = 1
+} ShowBacktrace;
+
 typedef enum
 {
 	SIZE_OPTIMIZATION_NOT_SET = -1,
-	SIZE_OPTIMIZATION_NONE = 0,     // None
-	SIZE_OPTIMIZATION_SMALL = 1,    // -Os
-	SIZE_OPTIMIZATION_TINY = 2,     // -Oz
+	SIZE_OPTIMIZATION_NONE = 0,  // None
+	SIZE_OPTIMIZATION_SMALL = 1, // -Os
+	SIZE_OPTIMIZATION_TINY = 2,  // -Oz
 } SizeOptimizationLevel;

 typedef enum
@@ -191,7 +233,7 @@ typedef enum
 typedef enum
 {
 	STRUCT_RETURN_DEFAULT = -1,
-	STRUCT_RETURN_STACK = 0,
+	STRUCT_RETURN_STACK = 0, // NOLINT
 	STRUCT_RETURN_REG = 1
 } StructReturn;

@@ -249,9 +291,17 @@ typedef enum
 	WIN_CRT_DEFAULT = -1,
 	WIN_CRT_NONE = 0,
 	WIN_CRT_DYNAMIC = 1,
-	WIN_CRT_STATIC = 2,
+	WIN_CRT_DYNAMIC_DEBUG = 2,
+	WIN_CRT_STATIC = 3,
+	WIN_CRT_STATIC_DEBUG = 4,
 } WinCrtLinking;

+typedef enum
+{
+	VECTOR_CONV_DEFAULT = 0,
+	VECTOR_CONV_OLD = 1,
+} VectorConv;
+
 typedef enum
 {
 	RELOC_DEFAULT = -1,
@@ -278,6 +328,7 @@ typedef enum
 	ELF_RISCV64,
 	ELF_X86,
 	ELF_X64,
+	ELF_XTENSA,
 	FREEBSD_X86,
 	FREEBSD_X64,
 	LINUX_AARCH64,
@@ -300,38 +351,80 @@ typedef enum
 	ARCH_OS_TARGET_LAST = WINDOWS_X64
 } ArchOsTarget;

+typedef enum
+{
+	SANITIZE_NOT_SET = -1,
+	SANITIZE_NONE,
+	SANITIZE_ADDRESS,
+	SANITIZE_MEMORY,
+	SANITIZE_THREAD,
+} SanitizeMode;
+
 #define ANY_WINDOWS_ARCH_OS WINDOWS_AARCH64: case WINDOWS_X64: case MINGW_X64

+typedef enum
+{
+	TARGET_TYPE_EXECUTABLE,
+	TARGET_TYPE_STATIC_LIB,
+	TARGET_TYPE_DYNAMIC_LIB,
+	TARGET_TYPE_OBJECT_FILES,
+	TARGET_TYPE_BENCHMARK,
+	TARGET_TYPE_TEST,
+} TargetType;
+
+static const char *targets[6] = {
+		[TARGET_TYPE_EXECUTABLE] = "executable",
+		[TARGET_TYPE_STATIC_LIB] = "static-lib",
+		[TARGET_TYPE_DYNAMIC_LIB] = "dynamic-lib",
+		[TARGET_TYPE_BENCHMARK] = "benchmark",
+		[TARGET_TYPE_TEST] = "test",
+		[TARGET_TYPE_OBJECT_FILES] = "object-files"
+};
+static const char *target_desc[6] = {
+		[TARGET_TYPE_EXECUTABLE] = "Executable",
+		[TARGET_TYPE_STATIC_LIB] = "Static library",
+		[TARGET_TYPE_DYNAMIC_LIB] = "Dynamic library",
+		[TARGET_TYPE_BENCHMARK] = "benchmark suite",
+		[TARGET_TYPE_TEST] = "test suite",
+		[TARGET_TYPE_OBJECT_FILES] = "object files"
+};
+
+
 typedef struct BuildOptions_
 {
-	const char *lib_dir[MAX_LIB_DIRS];
-	int lib_dir_count;
-	const char *libs[MAX_LIB_DIRS];
-	int lib_count;
-	const char* linker_args[MAX_LIB_DIRS];
-	int linker_arg_count;
-	const char* linker_lib_dir[MAX_LIB_DIRS];
-	int linker_lib_dir_count;
-	const char* linker_libs[MAX_LIB_DIRS];
-	int linker_lib_count;
+	const char *lib_dir[MAX_BUILD_LIB_DIRS];
+	size_t lib_dir_count;
+	const char *libs[MAX_BUILD_LIB_DIRS];
+	size_t lib_count;
+	const char* linker_args[MAX_BUILD_LIB_DIRS];
+	size_t linker_arg_count;
+	const char* linker_lib_dir[MAX_BUILD_LIB_DIRS];
+	size_t linker_lib_dir_count;
+	const char* linker_libs[MAX_BUILD_LIB_DIRS];
+	size_t linker_lib_count;
 	const char* std_lib_dir;
-	struct {
+	VectorConv vector_conv;
+	struct
+	{
 		const char *sdk;
 		const char *def;
 		WinCrtLinking crt_linking;
 	} win;
-	struct {
+	struct
+	{
 		const char *sysroot;
 		const char *min_version;
 		const char *sdk_version;
 	} macos;
-	struct {
+	struct
+	{
 		const char *crt;
 		const char *crtbegin;
 	} linuxpaths;
 	int build_threads;
 	const char **libraries_to_fetch;
 	const char **files;
+	const char **args;
 	const char **feature_names;
 	const char **removed_feature_names;
 	const char *output_name;
@@ -343,25 +436,40 @@ typedef struct BuildOptions_
 	const char *custom_linker_path;
 	uint32_t symtab_size;
 	unsigned version;
+	bool silence_deprecation;
 	CompilerBackend backend;
 	CompilerCommand command;
+	struct
+	{
+		ProjectSubcommand command;
+		const char *target_name;
+		TargetType target_type;
+	} project_options;
 	CompileOption compile_option;
 	TrustLevel trust_level;
 	DiagnosticsSeverity severity[DIAG_END_SENTINEL];
 	OptimizationSetting optsetting;
 	DebugInfo debug_info_override;
+	ShowBacktrace show_backtrace;
 	ArchOsTarget arch_os_target_override;
 	SafetyLevel safety_level;
+	PanicLevel panic_level;
 	SingleModule single_module;
+	UnrollLoops unroll_loops;
+	MergeFunctions merge_functions;
+	AutoVectorization loop_vectorization;
+	AutoVectorization slp_vectorization;
 	bool emit_llvm;
 	bool emit_asm;
 	bool benchmark_mode;
 	bool test_mode;
 	bool no_entry;
 	bool no_obj;
+	bool no_headers;
 	bool read_stdin;
 	bool print_output;
 	bool print_input;
+	bool run_once;
 	const char *panicfn;
 	const char *benchfn;
 	const char *testfn;
@@ -385,57 +493,61 @@ typedef struct BuildOptions_
 	SizeOptimizationLevel optsize;
 	RiscvFloatCapability riscv_float_capability;
 	MemoryEnvironment memory_environment;
+	SanitizeMode sanitize_mode;
 	bool print_keywords;
 	bool print_attributes;
 	bool print_builtins;
 	bool print_operators;
 	bool print_type_properties;
 	bool print_project_properties;
+	bool print_manifest_properties;
 	bool print_precedence;
-	bool print_build_settings;
 	bool print_linking;
 	bool benchmarking;
 	bool testing;
 } BuildOptions;

-typedef enum
-{
-	TARGET_TYPE_EXECUTABLE,
-	TARGET_TYPE_STATIC_LIB,
-	TARGET_TYPE_DYNAMIC_LIB,
-	TARGET_TYPE_OBJECT_FILES,
-	TARGET_TYPE_BENCHMARK,
-	TARGET_TYPE_TEST,
-} TargetType;
-
 typedef struct
 {
+	struct Library__ *parent;
 	ArchOsTarget arch_os;
+	const char *cc;
+	const char *cflags;
+	WinCrtLinking win_crt;
+	const char **csource_dirs;
+	const char **csources;
+	const char **cinclude_dirs;
 	const char **execs;
 	const char **link_flags;
 	const char **linked_libs;
-	const char **depends;
+	const char **dependencies;
 } LibraryTarget;

-typedef struct
+typedef struct Library__
 {
 	const char *dir;
 	const char *provides;
-	const char **depends;
+	const char **dependencies;
 	const char **execs;
+	const char *cc;
+	const char *cflags;
+	const char **csource_dirs;
+	const char **cinclude_dirs;
+	WinCrtLinking win_crt;
 	LibraryTarget *target_used;
 	LibraryTarget **targets;
 } Library;

-
 typedef struct
 {
 	TargetType type;
 	Library **library_list;
+	LibraryTarget **ccompiling_libraries;
 	const char *name;
 	const char *version;
 	const char *langrev;
 	const char **source_dirs;
+	const char **test_source_dirs;
 	const char **sources;
 	const char **libdirs;
 	const char **libs;
@@ -450,6 +562,7 @@ typedef struct
 	const char *asm_file_dir;
 	const char *script_dir;
 	bool run_after_compile;
+	bool delete_after_run;
 	bool generate_benchmark_runner;
 	bool generate_test_runner;
 	bool benchmark_output;
@@ -466,35 +579,45 @@ typedef struct
 	bool testing;
 	bool read_stdin;
 	bool print_output;
-	bool print_input; 
+	bool print_input;
 	bool print_linking;
 	bool no_entry;
+	bool kernel_build;
+	bool silence_deprecation;
 	int build_threads;
 	TrustLevel trust_level;
 	OptimizationSetting optsetting;
 	OptimizationLevel optlevel;
+	VectorConv vector_conv;
 	MemoryEnvironment memory_environment;
 	SizeOptimizationLevel optsize;
 	SingleModule single_module;
 	UseStdlib use_stdlib;
 	EmitStdlib emit_stdlib;
 	LinkLibc link_libc;
+	ShowBacktrace show_backtrace;
 	StripUnused strip_unused;
 	DebugInfo debug_info;
+	MergeFunctions merge_functions;
+	UnrollLoops unroll_loops;
+	AutoVectorization loop_vectorization;
+	AutoVectorization slp_vectorization;
 	RelocModel reloc_model;
 	ArchOsTarget arch_os_target;
 	CompilerBackend backend;
 	LinkerType linker_type;
 	uint32_t symtab_size;
 	uint32_t switchrange_max_size;
+	const char **args;
 	const char *panicfn;
 	const char *benchfn;
 	const char *testfn;
 	const char *cc;
 	const char *cflags;
-	const char **exec;
 	const char **csource_dirs;
 	const char **csources;
+	const char **cinclude_dirs;
+	const char **exec;
 	const char **feature_list;
 	const char *custom_linker_path;
 	struct
@@ -503,10 +626,14 @@ typedef struct
 		StructReturn x86_struct_return : 3;
 		X86VectorCapability x86_vector_capability : 4;
 		RiscvFloatCapability riscv_float_capability : 4;
-		bool trap_on_wrap : 1;
 		Win64Simd pass_win64_simd_as_arrays : 3;
+		bool trap_on_wrap : 1;
+		bool sanitize_address : 1;
+		bool sanitize_memory : 1;
+		bool sanitize_thread : 1;
 		FpOpt fp_math;
 		SafetyLevel safe_mode;
+		PanicLevel panic_level;
 		X86CpuSet x86_cpu_set;
 	} feature;
 	struct
@@ -531,7 +658,7 @@ typedef struct
 } BuildTarget;

 static const char *x86_cpu_set[8] = {
-	[X86CPU_BASELINE] = "baseline",
+	[X86CPU_BASELINE] = "baseline", // NOLINT
 	[X86CPU_SSSE3] = "ssse3",
 	[X86CPU_SSE4] = "sse4",
 	[X86CPU_AVX1] = "avx1",
@@ -548,15 +675,20 @@ static BuildTarget default_build_target = {
 		.optsize = SIZE_OPTIMIZATION_NOT_SET,
 		.arch_os_target = ARCH_OS_TARGET_DEFAULT,
 		.debug_info = DEBUG_INFO_NOT_SET,
+		.show_backtrace = SHOW_BACKTRACE_NOT_SET,
 		.use_stdlib = USE_STDLIB_NOT_SET,
 		.link_libc = LINK_LIBC_NOT_SET,
 		.emit_stdlib = EMIT_STDLIB_NOT_SET,
 		.linker_type = LINKER_TYPE_NOT_SET,
 		.single_module = SINGLE_MODULE_NOT_SET,
+		.unroll_loops = UNROLL_LOOPS_NOT_SET,
+		.merge_functions = MERGE_FUNCTIONS_NOT_SET,
+		.slp_vectorization = VECTORIZATION_NOT_SET,
+		.loop_vectorization = VECTORIZATION_NOT_SET,
 		.strip_unused = STRIP_UNUSED_NOT_SET,
 		.symtab_size = DEFAULT_SYMTAB_SIZE,
 		.reloc_model = RELOC_DEFAULT,
-		.cc = "cc",
+		.cc = NULL,
 		.version = "1.0.0",
 		.langrev = "1",
 		.cpu = "generic",
@@ -569,14 +701,30 @@ static BuildTarget default_build_target = {
 		.feature.x86_vector_capability = X86VECTOR_DEFAULT,
 		.feature.x86_cpu_set = X86CPU_DEFAULT,
 		.feature.safe_mode = SAFETY_NOT_SET,
+		.feature.panic_level = PANIC_NOT_SET,
 		.win.crt_linking = WIN_CRT_DEFAULT,
 		.win.def = NULL,
 		.switchrange_max_size = DEFAULT_SWITCHRANGE_MAX_SIZE,
 };

+extern const char *project_default_keys[][2];
+extern const int project_default_keys_count;
+extern const char *project_target_keys[][2];
+extern const int project_target_keys_count;
+extern const char *manifest_default_keys[][2];
+extern const int manifest_default_keys_count;
+extern const char *manifest_target_keys[][2];
+extern const int manifest_target_keys_count;
+extern char *arch_os_target[ARCH_OS_TARGET_LAST + 1];
+
 BuildOptions parse_arguments(int argc, const char *argv[]);
 ArchOsTarget arch_os_target_from_string(const char *target);
 bool command_accepts_files(CompilerCommand command);
-void update_build_target_with_opt_level(BuildTarget *target, OptimizationSetting level);
+bool command_passes_args(CompilerCommand command);
+void update_build_target_with_opt_level(BuildTarget *target,
+	OptimizationSetting level);
 void create_project(BuildOptions *build_options);
 void create_library(BuildOptions *build_options);
+void resolve_libraries(BuildTarget *build_target);
+void view_project(BuildOptions *build_options);
+void add_target_project(BuildOptions *build_options);
--- a/src/build/build_internal.h
+++ b/src/build/build_internal.h
@@ -12,6 +12,13 @@ typedef struct
 	BuildTarget **targets;
 } Project;

+#define COPY_IF_DEFAULT(target__, value__) \
+  do { if ((int)target__ == -1) target__ = value__; } while(0)
+
+extern bool silence_deprecation;
+
+extern const char *trust_level[3];
+
 static const char *memory_environment[6] = {
 	[MEMORY_ENV_NORMAL] = "normal",
 	[MEMORY_ENV_SMALL] = "small",
@@ -19,10 +26,17 @@ static const char *memory_environment[6] = {
 	[MEMORY_ENV_NONE] = "none",
 };

-static const char *wincrt_linking[3] = {
+static const char *wincrt_linking[5] = {
 	[WIN_CRT_NONE] = "none",
 	[WIN_CRT_DYNAMIC] = "dynamic",
+	[WIN_CRT_DYNAMIC_DEBUG] = "dynamic-debug",
 	[WIN_CRT_STATIC] = "static",
+	[WIN_CRT_STATIC_DEBUG] = "static-debug",
+};
+
+static const char *vector_conv[2] = {
+		[VECTOR_CONV_DEFAULT] = "default",
+		[VECTOR_CONV_OLD] = "old",
 };

 static const char *optsizes[3] = {
@@ -74,6 +88,11 @@ static const char *optlevels[4] = {
 	[OPTIMIZATION_AGGRESSIVE] = "max",
 };

+static const char *backtrace_levels[2] = {
+	[SHOW_BACKTRACE_OFF] = "off",
+	[SHOW_BACKTRACE_ON] = "on",
+};
+
 static const char *reloc_models[5] = {
 	[RELOC_NONE] = "none",
 	[RELOC_SMALL_PIC] = "pic",
@@ -82,6 +101,28 @@ static const char *reloc_models[5] = {
 	[RELOC_BIG_PIE] = "PIE",
 };

+static const char *sanitize_modes[4] = {
+	[SANITIZE_NONE] = "none",
+	[SANITIZE_ADDRESS] = "address",
+	[SANITIZE_MEMORY] = "memory",
+	[SANITIZE_THREAD] = "thread",
+};
+
 Project *project_load(void);
 BuildTarget *project_select_target(Project *project, const char *optional_target);
 void update_feature_flags(const char ***flags, const char ***removed_flag, const char *arg, bool add);
+
+const char *get_string(const char *file, const char *category, JSONObject *table, const char *key,
+	const char *default_value);
+int get_valid_bool(const char *file, const char *target, JSONObject *json, const char *key, int default_val);
+const char *get_optional_string(const char *file, const char *category, JSONObject *table, const char *key);
+const char *get_mandatory_string(const char *file, const char *category, JSONObject *object, const char *key);
+const char **get_string_array(const char *file, const char *category, JSONObject *table, const char *key, bool mandatory);
+const char **get_optional_string_array(const char *file, const char *target, JSONObject *table, const char *key);
+const char *get_cflags(const char *file, const char *target, JSONObject *json, const char *original_flags);
+void get_list_append_strings(const char *file, const char *target, JSONObject *json, const char ***list_ptr,
+	const char *base, const char *override, const char *add);
+int get_valid_string_setting(const char *file, const char *target, JSONObject *json, const char *key, const char **values, int first_result, int count, const char *expected);
+int get_valid_enum_from_string(const char *str, const char *target, const char **values, int count, const char *expected);
+void check_json_keys(const char *valid_keys[][2], size_t key_count, const char *deprecated_keys[], size_t deprecated_key_count, JSONObject *json, const char *target_name, const char *option);
+long get_valid_integer(JSONObject *table, const char *key, const char *category, bool mandatory);
--- a/src/build/build_options.c
+++ b/src/build/build_options.c
@@ -2,17 +2,19 @@
 // Use of this source code is governed by the GNU LGPLv3.0 license
 // a copy of which can be found in the LICENSE file.

-#include "build_internal.h"
 #include "../utils/whereami.h"
+#include "build.h"
+#include "build_internal.h"

 extern int llvm_version_major;
+bool silence_deprecation;

 static int arg_index;
 static int arg_count;
-static const char** args;
-static const char* current_arg;
-extern const char* llvm_version;
-extern const char* llvm_target;
+static const char **args;
+static const char *current_arg;
+extern const char *llvm_version;
+extern const char *llvm_target;

 char *arch_os_target[ARCH_OS_TARGET_LAST + 1] = {
 	[ELF_AARCH64] = "elf-aarch64",
@@ -20,6 +22,7 @@ char *arch_os_target[ARCH_OS_TARGET_LAST + 1] = {
 	[ELF_RISCV64] = "elf-riscv64",
 	[ELF_X86] = "elf-x86",
 	[ELF_X64] = "elf-x64",
+	[ELF_XTENSA] = "elf-xtensa",
 	[FREEBSD_X86] = "freebsd-x86",
 	[FREEBSD_X64] = "freebsd-x64",
 	[LINUX_AARCH64] = "linux-aarch64",
@@ -47,143 +50,151 @@ const char *trust_level[3] = {
 	[TRUST_FULL] = "full",
 };

-#define EOUTPUT(string, ...) fprintf(stderr, string "\n", ##__VA_ARGS__)
-#define OUTPUT(string, ...) fprintf(stdout, string "\n", ##__VA_ARGS__)
-#define FAIL_WITH_ERR(string, ...) do { fprintf(stderr, "Error: " string "\n\n", ##__VA_ARGS__); usage(); exit_compiler(EXIT_FAILURE); } while (0)
+#define EOUTPUT(string, ...) fprintf(stderr, string "\n", ##__VA_ARGS__) // NOLINT
+#define PRINTF(string, ...) fprintf(stdout, string "\n", ##__VA_ARGS__) // NOLINT
+#define FAIL_WITH_ERR(string, ...) do { fprintf(stderr, "Error: " string "\n\n", ##__VA_ARGS__); usage(); exit_compiler(EXIT_FAILURE); } while (0) /* NOLINT */
+#define PROJECT_FAIL_WITH_ERR(string, ...) do { fprintf(stderr, "Error: " string "\n\n", ##__VA_ARGS__); project_usage(); exit_compiler(EXIT_FAILURE); } while (0) /* NOLINT */

 static void usage(void)
 {
-	OUTPUT("Usage: %s [<options>] <command> [<args>]", args[0]);
-	OUTPUT("");
-	OUTPUT("Commands:");
-	OUTPUT("");
-	OUTPUT("  compile <file1> [<file2> ...]           Compile files without a project into an executable.");
-	OUTPUT("  init <project name>                     Initialize a new project structure.");
-	OUTPUT("  init-lib <library name>                 Initialize a new library structure.");
-	OUTPUT("  build [<target>]                        Build the target in the current project.");
-	OUTPUT("  benchmark                               Run the benchmarks in the current project.");
-	OUTPUT("  test                                    Run the unit tests in the current project.");
-	OUTPUT("  clean                                   Clean all build files.");
-	OUTPUT("  run [<target>]                          Run (and build if needed) the target in the current project.");
-	OUTPUT("  dist [<target>]                         Clean and build a target for distribution.");
-	OUTPUT("  directives [<target>]                   Generate documentation for the target.");
-	OUTPUT("  bench [<target>]                        Benchmark a target.");
-	OUTPUT("  clean-run [<target>]                    Clean, then run the target.");
-	OUTPUT("  compile-run <file1> [<file2> ...]       Compile files then immediately run the result.");
-	OUTPUT("  compile-only <file1> [<file2> ...]      Compile files but do not perform linking.");
-	OUTPUT("  compile-benchmark <file1> [<file2> ...] Compile files into an executable and run benchmarks.");
-	OUTPUT("  compile-test <file1> [<file2> ...]      Compile files into an executable and run unit tests.");
-	OUTPUT("  static-lib <file1> [<file2> ...]        Compile files without a project into a static library.");
-	OUTPUT("  dynamic-lib <file1> [<file2> ...]       Compile files without a project into a dynamic library.");
-	OUTPUT("  headers <file1> [<file2> ...]           Analyse files and generate C headers for public methods.");
-	OUTPUT("  vendor-fetch <library> ...              Fetches one or more libraries from the vendor collection.");
-	OUTPUT("");
-	OUTPUT("Options:");
-	OUTPUT("  --tb                       - Use Tilde Backend for compilation.");
-	OUTPUT("  --stdlib <dir>             - Use this directory as the C3 standard library path.");
-	OUTPUT("  --no-entry                 - Do not generate (or require) a main function.");
-	OUTPUT("  --libdir <dir>             - Add this directory to the C3 library search paths.");
-	OUTPUT("  --lib <name>               - Add this library to the compilation.");
-	OUTPUT("  --path <dir>               - Use this as the base directory for the current command.");
-	OUTPUT("  --template <template>      - Select template for 'init': \"exe\", \"static-lib\", \"dynamic-lib\" or a path.");
-	OUTPUT("  --about                    - Prints a short description of C3.");
-	OUTPUT("  --symtab <value>           - Sets the preferred symtab size.");
-	OUTPUT("  -V --version               - Print version information.");
-	OUTPUT("  -E                         - Lex only.");
-	OUTPUT("  -P                         - Only parse and output the AST as JSON.");
-	OUTPUT("  -C                         - Only lex, parse and check.");
-	OUTPUT("  -                          - Read code from standard in.");
-	OUTPUT("  -o <file>                  - Write output to <file>.");
-	OUTPUT("  -O0                        - Safe, no optimizations, emit debug info.");
-	OUTPUT("  -O1                        - Safe, high optimization, emit debug info.");
-	OUTPUT("  -O2                        - Unsafe, high optimization, emit debug info.");
-	OUTPUT("  -O3                        - Unsafe, high optimization, single module, emit debug info.");
-	OUTPUT("  -O4                        - Unsafe, highest optimization, relaxed maths, single module, emit debug info.");
-	OUTPUT("  -O5                        - Unsafe, highest optimization, fast maths, single module, emit debug info.");
-	OUTPUT("  -Os                        - Unsafe, high optimization, small code, single module, no debug info.");
-	OUTPUT("  -Oz                        - Unsafe, high optimization, tiny code, single module, no debug info.");
-	OUTPUT("  -D <name>                  - Add feature flag <name>.");
-	OUTPUT("  -U <name>                  - Remove feature flag <name>.");
-	OUTPUT("  --trust=<option>           - Trust level: none (default), include ($include allowed), full ($exec / exec allowed).");
-	OUTPUT("  --output-dir <dir>        - Override general output directory.");
-	OUTPUT("  --build-dir <dir>          - Override build output directory.");
-	OUTPUT("  --obj-out <dir>            - Override object file output directory.");
-	OUTPUT("  --script-dir <dir>         - Override the base directory for $exec.");
-	OUTPUT("  --llvm-out <dir>           - Override llvm output directory for '--emit-llvm'.");
-	OUTPUT("  --emit-llvm                - Emit LLVM IR as a .ll file per module.");
-	OUTPUT("  --asm-out <dir>            - Override asm output directory for '--emit-asm'.");
-	OUTPUT("  --emit-asm                 - Emit asm as a .s file per module.");
-	OUTPUT("  --obj                      - Emit object files. (Enabled by default)");
-	OUTPUT("  --no-obj                   - Do not output object files, this is only valid for `compile-only`.");
-	OUTPUT("  --target <target>          - Compile for a particular architecture + OS target.");
-	OUTPUT("  --threads <number>         - Set the number of threads to use for compilation.");
-	OUTPUT("  --safe=<yes|no>            - Turn safety (contracts, runtime bounds checking, null pointer checks etc) on or off.");
-	OUTPUT("  --optlevel=<option>        - Code optimization level: none, less, more, max.");
-	OUTPUT("  --optsize=<option>         - Code size optimization: none, small, tiny.");
-	OUTPUT("  --single-module=<yes|no>   - Compile all modules together, enables more inlining.");
-	OUTPUT("");
-	OUTPUT("  -g                         - Emit debug info.");
-	OUTPUT("  -g0                        - Emit no debug info.");
-	OUTPUT("");
-	OUTPUT("");
-	OUTPUT("  -l <library>               - Link with the library provided.");
-	OUTPUT("  -L <library dir>           - Append the directory to the linker search paths.");
-	OUTPUT("  -z <argument>              - Send the <argument> as a parameter to the linker.");
-	OUTPUT("  --cc <path>                - Set C compiler (for C files in projects and use as system linker).");
-	OUTPUT("  --linker=<option> [<path>] - Linker: builtin, cc, custom (default is 'cc'), 'custom' requires a path.");
-	OUTPUT("");
-	OUTPUT("  --use-stdlib=<yes|no>      - Include the standard library (default: yes).");
-	OUTPUT("  --link-libc=<yes|no>       - Link libc other default libraries (default: yes).");
-	OUTPUT("  --emit-stdlib=<yes|no>     - Output files for the standard library. (default: yes)");
-	OUTPUT("  --panicfn <name>           - Override the panic function name.");
-	OUTPUT("  --testfn <name>            - Override the test runner function name.");
-	OUTPUT("  --benchfn <name>           - Override the benchmark runner function name.");
-	OUTPUT("");
-	OUTPUT("  --reloc=<option>           - Relocation model: none, pic, PIC, pie, PIE.");
-	OUTPUT("  --x86cpu=<option>          - Set general level of x64 cpu: baseline, ssse3, sse4, avx1, avx2-v1, avx2-v2 (Skylake/Zen1+), avx512 (Icelake/Zen4+), native.");
-	OUTPUT("  --x86vec=<option>          - Set max type of vector use: none, mmx, sse, avx, avx512, default.");
-	OUTPUT("  --riscvfloat=<option>      - Set type of RISC-V float support: none, float, double");
-	OUTPUT("  --memory-env=<option>      - Set the memory environment: normal, small, tiny, none.");
-	OUTPUT("  --strip-unused=<yes|no>    - Strip unused code and globals from the output. (default: yes)");
-	OUTPUT("  --fp-math=<option>         - FP math behaviour: strict, relaxed, fast.");
-	OUTPUT("  --win64-simd=<option>      - Win64 SIMD ABI: array, full.");
-	OUTPUT("");
-	OUTPUT("  --debug-stats              - Print debug statistics.");
-	OUTPUT("  --print-linking            - Print linker arguments.");
+	PRINTF("Usage: %s [<options>] <command> [<args>]", args[0]);
+	PRINTF("");
+	PRINTF("Commands:");
+	PRINTF("");
+	PRINTF("  compile <file1> [<file2> ...]                       Compile files without a project into an executable.");
+	PRINTF("  init <project name>                                 Initialize a new project structure.");
+	PRINTF("  init-lib <library name>                             Initialize a new library structure.");
+	PRINTF("  build [<target>]                                    Build the target in the current project.");
+	PRINTF("  benchmark                                           Run the benchmarks in the current project.");
+	PRINTF("  test                                                Run the unit tests in the current project.");
+	PRINTF("  clean                                               Clean all build files.");
+	PRINTF("  run [<target>] [-- [<arg1> ...]]                    Run (and build if needed) the target in the current project.");
+	PRINTF("  dist [<target>]                                     Clean and build a target for distribution.");
+	PRINTF("  directives [<target>]                               Generate documentation for the target.");
+	PRINTF("  bench [<target>]                                    Benchmark a target.");
+	PRINTF("  clean-run [<target>] [-- [<arg1> ...]]              Clean, then run the target.");
+	PRINTF("  compile-run <file1> [<file2> ...] [-- [<arg1> ...]] Compile files then immediately run the result.");
+	PRINTF("  compile-only <file1> [<file2> ...]                  Compile files but do not perform linking.");
+	PRINTF("  compile-benchmark <file1> [<file2> ...]             Compile files into an executable and run benchmarks.");
+	PRINTF("  compile-test <file1> [<file2> ...]                  Compile files into an executable and run unit tests.");
+	PRINTF("  static-lib <file1> [<file2> ...]                    Compile files without a project into a static library.");
+	PRINTF("  dynamic-lib <file1> [<file2> ...]                   Compile files without a project into a dynamic library.");
+	PRINTF("  headers <file1> [<file2> ...]                       Analyse files and generate C headers for public methods.");
+	PRINTF("  vendor-fetch <library> ...                          Fetches one or more libraries from the vendor collection.");
+	PRINTF("  project <subcommand> ...                            Manipulate or view project files.");
+	PRINTF("");
+	PRINTF("Options:");
+	PRINTF("  --stdlib <dir>             - Use this directory as the C3 standard library path.");
+	PRINTF("  --no-entry                 - Do not generate (or require) a main function.");
+	PRINTF("  --libdir <dir>             - Add this directory to the C3 library search paths.");
+	PRINTF("  --lib <name>               - Add this library to the compilation.");
+	PRINTF("  --path <dir>               - Use this as the base directory for the current command.");
+	PRINTF("  --template <template>      - Select template for 'init': \"exe\", \"static-lib\", \"dynamic-lib\" or a path.");
+	PRINTF("  --about                    - Prints a short description of C3.");
+	PRINTF("  --symtab <value>           - Sets the preferred symtab size.");
+	PRINTF("  --max-mem <value>          - Sets the preferred max memory size.");
+	PRINTF("  --run-once                 - After running the output file, delete it immediately.");
+	PRINTF("  -V --version               - Print version information.");
+	PRINTF("  -E                         - Lex only.");
+	PRINTF("  -P                         - Only parse and output the AST as JSON.");
+	PRINTF("  -C                         - Only lex, parse and check.");
+	PRINTF("  -                          - Read code from standard in.");
+	PRINTF("  -o <file>                  - Write output to <file>.");
+	PRINTF("  -O0                        - Safe, no optimizations, emit debug info.");
+	PRINTF("  -O1                        - Safe, high optimization, emit debug info.");
+	PRINTF("  -O2                        - Unsafe, high optimization, emit debug info.");
+	PRINTF("  -O3                        - Unsafe, high optimization, single module, emit debug info.");
+	PRINTF("  -O4                        - Unsafe, highest optimization, relaxed maths, single module, emit debug info, no panic messages.");
+	PRINTF("  -O5                        - Unsafe, highest optimization, fast maths, single module, emit debug info, no panic messages, no backtrace.");
+	PRINTF("  -Os                        - Unsafe, high optimization, small code, single module, no debug info, no panic messages.");
+	PRINTF("  -Oz                        - Unsafe, high optimization, tiny code, single module, no debug info, no panic messages, no backtrace.");
+	PRINTF("  -D <name>                  - Add feature flag <name>.");
+	PRINTF("  -U <name>                  - Remove feature flag <name>.");
+	PRINTF("  --trust=<option>           - Trust level: none (default), include ($include allowed), full ($exec / exec allowed).");
+	PRINTF("  --output-dir <dir>         - Override general output directory.");
+	PRINTF("  --build-dir <dir>          - Override build output directory.");
+	PRINTF("  --obj-out <dir>            - Override object file output directory.");
+	PRINTF("  --script-dir <dir>         - Override the base directory for $exec.");
+	PRINTF("  --llvm-out <dir>           - Override llvm output directory for '--emit-llvm'.");
+	PRINTF("  --emit-llvm                - Emit LLVM IR as a .ll file per module.");
+	PRINTF("  --asm-out <dir>            - Override asm output directory for '--emit-asm'.");
+	PRINTF("  --emit-asm                 - Emit asm as a .s file per module.");
+	PRINTF("  --obj                      - Emit object files. (Enabled by default)");
+	PRINTF("  --no-obj                   - Do not output object files, this is only valid for `compile-only`.");
+	PRINTF("  --no-headers               - Do not generate C headers when building a library.");
+	PRINTF("  --target <target>          - Compile for a particular architecture + OS target.");
+	PRINTF("  --threads <number>         - Set the number of threads to use for compilation.");
+	PRINTF("  --safe=<yes|no>            - Turn safety (contracts, runtime bounds checking, null pointer checks etc) on or off.");
+	PRINTF("  --panic-msg=<yes|no>       - Turn panic message output on or off.");
+	PRINTF("  --optlevel=<option>        - Code optimization level: none, less, more, max.");
+	PRINTF("  --optsize=<option>         - Code size optimization: none, small, tiny.");
+	PRINTF("  --single-module=<yes|no>   - Compile all modules together, enables more inlining.");
+	PRINTF("  --show-backtrace=<yes|no>  - Show detailed backtrace on segfaults.");
+	PRINTF("");
+	PRINTF("  -g                         - Emit debug info.");
+	PRINTF("  -g0                        - Emit no debug info.");
+	PRINTF("");
+	PRINTF("  -l <library>               - Link with the library provided.");
+	PRINTF("  -L <library dir>           - Append the directory to the linker search paths.");
+	PRINTF("  -z <argument>              - Send the <argument> as a parameter to the linker.");
+	PRINTF("  --cc <path>                - Set C compiler (for C files in projects and use as system linker).");
+	PRINTF("  --linker=<option> [<path>] - Linker: builtin, cc, custom (default is 'cc'), 'custom' requires a path.");
+	PRINTF("");
+	PRINTF("  --use-stdlib=<yes|no>      - Include the standard library (default: yes).");
+	PRINTF("  --link-libc=<yes|no>       - Link libc other default libraries (default: yes).");
+	PRINTF("  --emit-stdlib=<yes|no>     - Output files for the standard library. (default: yes)");
+	PRINTF("  --panicfn <name>           - Override the panic function name.");
+	PRINTF("  --testfn <name>            - Override the test runner function name.");
+	PRINTF("  --benchfn <name>           - Override the benchmark runner function name.");
+	PRINTF("");
+	PRINTF("  --reloc=<option>           - Relocation model: none, pic, PIC, pie, PIE.");
+	PRINTF("  --x86cpu=<option>          - Set general level of x64 cpu: baseline, ssse3, sse4, avx1, avx2-v1, avx2-v2 (Skylake/Zen1+), avx512 (Icelake/Zen4+), native.");
+	PRINTF("  --x86vec=<option>          - Set max type of vector use: none, mmx, sse, avx, avx512, default.");
+	PRINTF("  --riscvfloat=<option>      - Set type of RISC-V float support: none, float, double");
+	PRINTF("  --memory-env=<option>      - Set the memory environment: normal, small, tiny, none.");
+	PRINTF("  --strip-unused=<yes|no>    - Strip unused code and globals from the output. (default: yes)");
+	PRINTF("  --fp-math=<option>         - FP math behaviour: strict, relaxed, fast.");
+	PRINTF("  --win64-simd=<option>      - Win64 SIMD ABI: array, full.");
+	PRINTF("");
+	PRINTF("  --debug-stats              - Print debug statistics.");
+	PRINTF("  --print-linking            - Print linker arguments.");
 #ifndef NDEBUG
-	OUTPUT("  --debug-log                - Print debug logging to stdout.");
+	PRINTF("  --debug-log                - Print debug logging to stdout.");
 #endif
-	OUTPUT("");
-	OUTPUT("  --benchmarking             - Run built-in benchmarks.");
-	OUTPUT("  --testing                  - Run built-in tests.");
-	OUTPUT("");
-	OUTPUT("  --list-attributes          - List all attributes.");
-	OUTPUT("  --list-builtins            - List all builtins.");
-	OUTPUT("  --list-keywords            - List all keywords.");
-	OUTPUT("  --list-operators           - List all operators.");
-	OUTPUT("  --list-precedence          - List operator precedence order.");
-	OUTPUT("  --list-project-properties  - List all available keys used in project.json files.");
-	OUTPUT("  --list-targets             - List all architectures the compiler supports.");
-	OUTPUT("  --list-type-properties     - List all type properties.");
-	OUTPUT("");
-	OUTPUT("  --print-output             - Print the object files created to stdout.");
-	OUTPUT("  --print-input              - Print inputted C3 files to stdout.");
-	OUTPUT("");
-	OUTPUT("  --winsdk <dir>             - Set the directory for Windows system library files for cross compilation.");
-	OUTPUT("  --wincrt=<option>          - Windows CRT linking: none, static, dynamic (default).");
-	OUTPUT("  --windef <file>            - Use Windows 'def' file for function exports instead of 'dllexport'.");
-	OUTPUT("");
-	OUTPUT("  --macossdk <dir>           - Set the directory for the MacOS SDK for cross compilation.");
-	OUTPUT("  --macos-min-version <ver>  - Set the minimum MacOS version to compile for.");
-	OUTPUT("  --macos-sdk-version <ver>  - Set the MacOS SDK compiled for.");
-	OUTPUT("");
-	OUTPUT("  --linux-crt <dir>          - Set the directory to use for finding crt1.o and related files.");
-	OUTPUT("  --linux-crtbegin <dir>     - Set the directory to use for finding crtbegin.o and related files.");
+	PRINTF("");
+	PRINTF("  --benchmarking             - Run built-in benchmarks.");
+	PRINTF("  --testing                  - Run built-in tests.");
+	PRINTF("");
+	PRINTF("  --list-attributes          - List all attributes.");
+	PRINTF("  --list-builtins            - List all builtins.");
+	PRINTF("  --list-keywords            - List all keywords.");
+	PRINTF("  --list-operators           - List all operators.");
+	PRINTF("  --list-precedence          - List operator precedence order.");
+	PRINTF("  --list-project-properties  - List all available keys used in project.json files.");
+	PRINTF("  --list-manifest-properties - List all available keys used in manifest.json files.");
+	PRINTF("  --list-targets             - List all architectures the compiler supports.");
+	PRINTF("  --list-type-properties     - List all type properties.");
+	PRINTF("");
+	PRINTF("  --print-output             - Print the object files created to stdout.");
+	PRINTF("  --print-input              - Print inputted C3 files to stdout.");
+	PRINTF("");
+	PRINTF("  --winsdk <dir>             - Set the directory for Windows system library files for cross compilation.");
+	PRINTF("  --wincrt=<option>          - Windows CRT linking: none, static-debug, static, dynamic-debug (default if debug info enabled), dynamic (default).");
+	PRINTF("  --windef <file>            - Use Windows 'def' file for function exports instead of 'dllexport'.");
+	PRINTF("");
+	PRINTF("  --macossdk <dir>           - Set the directory for the MacOS SDK for cross compilation.");
+	PRINTF("  --macos-min-version <ver>  - Set the minimum MacOS version to compile for.");
+	PRINTF("  --macos-sdk-version <ver>  - Set the MacOS SDK compiled for.");
+	PRINTF("");
+	PRINTF("  --linux-crt <dir>          - Set the directory to use for finding crt1.o and related files.");
+	PRINTF("  --linux-crtbegin <dir>     - Set the directory to use for finding crtbegin.o and related files.");
+	PRINTF("");
+	PRINTF("  --vector-conv=<option>     - Set vector conversion behaviour: default, old.");
+	PRINTF("  --sanitize=<option>        - Enable sanitizer: address, memory, thread.");
 }


-
-static const char* check_dir(const char *path)
+static const char *check_dir(const char *path)
 {
 	static char *original_path = NULL;
 	if (!original_path)
@@ -200,25 +211,24 @@ static inline bool at_end()
 	return arg_index == arg_count - 1;
 }

-static inline const char* next_arg()
+static inline const char *next_arg()
 {
 	assert(!at_end());
 	current_arg = args[++arg_index];
 	return current_arg;
 }

-
 static inline bool next_is_opt()
 {
 	return args[arg_index + 1][0] == '-';
 }

-INLINE bool match_longopt(const char* name)
+INLINE bool match_longopt(const char *name)
 {
 	return str_eq(&current_arg[2], name);
 }

-static inline const char *match_argopt(const char* name)
+static inline const char *match_argopt(const char *name)
 {
 	size_t len = strlen(name);
 	if (memcmp(&current_arg[2], name, len) != 0) return false;
@@ -226,7 +236,7 @@ static inline const char *match_argopt(const char* name)
 	return &current_arg[2 + len + 1];
 }

-static inline bool match_shortopt(const char* name)
+static inline bool match_shortopt(const char *name)
 {
 	return strcmp(&current_arg[1], name) == 0;
 }
@@ -234,14 +244,24 @@ static inline bool match_shortopt(const char* name)

 void append_file(BuildOptions *build_options)
 {
-	if (vec_size(build_options->files) == MAX_FILES)
+	if (vec_size(build_options->files) == MAX_COMMAND_LINE_FILES)
 	{
-		fprintf(stderr, "Max %d files may be specified\n", MAX_FILES);
+		EOUTPUT("Max %d files may be specified.", MAX_COMMAND_LINE_FILES);
 		exit_compiler(EXIT_FAILURE);
 	}
 	vec_add(build_options->files, current_arg);
 }

+void append_arg(BuildOptions *build_options)
+{
+	if (vec_size(build_options->args) == MAX_COMMAND_LINE_RUN_ARGS)
+	{
+		EOUTPUT("Max %d args may be specified.", MAX_COMMAND_LINE_RUN_ARGS);
+		exit_compiler(EXIT_FAILURE);
+	}
+	vec_add(build_options->args, current_arg);
+}
+
 static bool arg_match(const char *candidate)
 {
 	return strcmp(current_arg, candidate) == 0;
@@ -259,6 +279,52 @@ static void parse_optional_target(BuildOptions *options)
 	}
 }

+static void project_usage()
+{
+	PRINTF("Usage: %s [<options>] project <subcommand> [<args>]", args[0]);
+	PRINTF("");
+	PRINTF("Project Subcommands:");
+	PRINTF("  view                                          view the current projects structure");
+	PRINTF("  add-target <name>  <target_type>              add a new target to the project");
+}
+
+static void parse_project_subcommand(BuildOptions *options)
+{
+	if (arg_match("view"))
+	{
+		options->project_options.command = SUBCOMMAND_VIEW;
+		return;
+	}
+	if (arg_match("add-target"))
+	{
+		options->project_options.command = SUBCOMMAND_ADD;
+
+		if (at_end() || next_is_opt()) error_exit("Expected a target name");
+		options->project_options.target_name = next_arg();
+
+		if (at_end() || next_is_opt()) error_exit("Expected a target type like 'executable' or 'static-lib'");
+		options->project_options.target_type = (TargetType)get_valid_enum_from_string(next_arg(), "type", targets, ELEMENTLEN(targets), "a target type like 'executable' or 'static-lib'");
+
+		return;
+	}
+
+	PROJECT_FAIL_WITH_ERR("Cannot process the unknown subcommand \"%s\".",
+		current_arg);
+}
+
+static void parse_project_options(BuildOptions *options)
+{
+	options->project_options.command = SUBCOMMAND_MISSING;
+	if (at_end())
+	{
+		project_usage();
+		return;
+	}
+
+	next_arg();
+	parse_project_subcommand(options);
+}
+
 static void parse_command(BuildOptions *options)
 {
 	if (arg_match("init"))
@@ -386,30 +452,43 @@ static void parse_command(BuildOptions *options)
 		parse_optional_target(options);
 		return;
 	}
+	if (arg_match("project"))
+	{
+		options->command = COMMAND_PROJECT;
+		parse_project_options(options);
+		return;
+	}
 	FAIL_WITH_ERR("Cannot process the unknown command \"%s\".", current_arg);
 }
+
 static void print_all_targets(void)
 {
-	OUTPUT("Available targets:");
+	PRINTF("Available targets:");
 	for (unsigned i = 1; i <= ARCH_OS_TARGET_LAST; i++)
 	{
-		OUTPUT("   %s", arch_os_target[i]);
+		PRINTF("   %s", arch_os_target[i]);
 	}
 }

 static void print_version(void)
 {
-	OUTPUT("C3 Compiler Version:       %s%s", COMPILER_VERSION, PRERELEASE ? " (prerelease)" : "");
-	OUTPUT("Installed directory:       %s", find_executable_path());
-	OUTPUT("LLVM version:              %s", llvm_version);
-	OUTPUT("LLVM default target:       %s", llvm_target);
+	static const char *BUILD_DATE = __DATE__;
+	static const char *BUILD_TIME = __TIME__;
+#if	PRERELEASE
+	PRINTF("C3 Compiler Version:       %s (Pre-release, %s %s)", COMPILER_VERSION, BUILD_DATE, BUILD_TIME);
+#else
+	PRINTF("C3 Compiler Version:       %s", COMPILER_VERSION);
+#endif
+	PRINTF("Installed directory:       %s", find_executable_path());
+	PRINTF("LLVM version:              %s", llvm_version);
+	PRINTF("LLVM default target:       %s", llvm_target);
 }

 static void add_linker_arg(BuildOptions *options, const char *arg)
 {
-	if (options->linker_arg_count == MAX_LIB_DIRS)
+	if (options->linker_arg_count == MAX_BUILD_LIB_DIRS)
 	{
-		error_exit("Too many linker arguments are given, more than %d\n", MAX_LIB_DIRS);
+		error_exit("Too many linker arguments are given, more than %d\n", MAX_BUILD_LIB_DIRS);
 	}
 	options->linker_args[options->linker_arg_count++] = arg;
 }
@@ -429,26 +508,28 @@ void update_feature_flags(const char ***flags, const char ***removed_flags, cons
 	// Remove from opposite list using string equality
 	// More elegant would be using a Set or Map, but that's overkill
 	// for something that's likely just 1-2 values.
-	FOREACH_BEGIN_IDX(i, const char *value, *to_remove_from)
+	FOREACH_IDX(i, const char *, value, *to_remove_from)
+	{
 		if (str_eq(value, arg))
 		{
 			vec_erase_ptr_at(*to_remove_from, i);
 			break;
 		}
-	FOREACH_END();
+	}

 	// First we check that it's not in the list
 	const char ***to_add_to_ref = add ? flags : removed_flags;
-	FOREACH_BEGIN(const char *value, *to_add_to_ref)
+	FOREACH(const char *, value, *to_add_to_ref)
+	{
 		// If we have a match, we don't add it.
 		if (str_eq(value, arg)) return;
-	FOREACH_END();
+	}

 	// No match, so add it.
 	vec_add(*to_add_to_ref, arg);
 }

-static int parse_multi_option(const char *start, unsigned count, const char** elements)
+static int parse_multi_option(const char *start, unsigned count, const char **elements)
 {
 	const char *arg = current_arg;
 	int select = str_findlist(start, count, elements);
@@ -638,9 +719,18 @@ static void parse_option(BuildOptions *options)
 			}
 			break;
 		case '-':
-			if (match_longopt("tb"))
+			if (match_longopt("max-mem"))
 			{
-				options->backend = BACKEND_TB;
+				if (at_end() || next_is_opt()) error_exit("error: --max-mem needs a valid integer.");
+				const char *maxmem_string = next_arg();
+				int maxmem = atoi(maxmem_string);
+				if (maxmem < 128) PRINTF("Expected a valid positive integer >= 128.");
+				return;
+			}
+			if (match_longopt("silence-deprecation"))
+			{
+				options->silence_deprecation = true;
+				silence_deprecation = true;
 				return;
 			}
 			if (match_longopt("symtab"))
@@ -648,7 +738,7 @@ static void parse_option(BuildOptions *options)
 				if (at_end() || next_is_opt()) error_exit("error: --symtab needs a valid integer.");
 				const char *symtab_string = next_arg();
 				int symtab = atoi(symtab_string);
-				if (symtab < 1024) OUTPUT("Expected a valid positive integer >= 1024.");
+				if (symtab < 1024) PRINTF("Expected a valid positive integer >= 1024.");
 				options->symtab_size = next_highest_power_of_2(symtab);
 				return;
 			}
@@ -657,6 +747,11 @@ static void parse_option(BuildOptions *options)
 				print_version();
 				exit_compiler(COMPILER_SUCCESS_EXIT);
 			}
+			if (match_longopt("run-once"))
+			{
+				options->run_once = true;
+				return;
+			}
 			if ((argopt = match_argopt("fp-math")))
 			{
 				options->fp_math = (FpOpt)parse_multi_option(argopt, 3, fp_math);
@@ -677,6 +772,16 @@ static void parse_option(BuildOptions *options)
 				options->safety_level = (SafetyLevel)parse_multi_option(argopt, 2, on_off);
 				return;
 			}
+			if ((argopt = match_argopt("show-backtrace")))
+			{
+				options->show_backtrace = (ShowBacktrace) parse_multi_option(argopt, 2, on_off);
+				return;
+			}
+			if ((argopt = match_argopt("panic-msg")))
+			{
+				options->panic_level = (PanicLevel)parse_multi_option(argopt, 2, on_off);
+				return;
+			}
 			if ((argopt = match_argopt("single-module")))
 			{
 				options->single_module = (SingleModule)parse_multi_option(argopt, 2, on_off);
@@ -745,8 +850,8 @@ static void parse_option(BuildOptions *options)
 			}
 			if (match_longopt("about"))
 			{
-				OUTPUT("The C3 Compiler");
-				OUTPUT("C3 is low level programming language based on C.");
+				PRINTF("The C3 Compiler");
+				PRINTF("C3 is low level programming language based on C.");
 				exit_compiler(COMPILER_SUCCESS_EXIT);
 			}
 			if (match_longopt("no-obj"))
@@ -759,6 +864,11 @@ static void parse_option(BuildOptions *options)
 				options->no_obj = false;
 				return;
 			}
+			if (match_longopt("no-headers"))
+			{
+				options->no_headers = true;
+				return;
+			}
 			if (match_longopt("debug-log"))
 			{
 				debug_log = true;
@@ -805,6 +915,12 @@ static void parse_option(BuildOptions *options)
 				options->command = COMMAND_PRINT_SYNTAX;
 				return;
 			}
+			if (match_longopt("list-manifest-properties"))
+			{
+				options->print_manifest_properties = true;
+				options->command = COMMAND_PRINT_SYNTAX;
+				return;
+			}
 			if (match_longopt("list-operators"))
 			{
 				options->print_operators = true;
@@ -822,8 +938,8 @@ static void parse_option(BuildOptions *options)
 				if (at_end() || next_is_opt()) error_exit("error: --threads needs a valid integer 1 or higher.");
 				const char *thread_string = next_arg();
 				int threads = atoi(thread_string);
-				if (threads < 1) OUTPUT("Expected a valid integer 1 or higher.");
-				if (threads > MAX_THREADS) OUTPUT("Cannot exceed %d threads.", MAX_THREADS);
+				if (threads < 1) PRINTF("Expected a valid integer 1 or higher.");
+				if (threads > MAX_THREADS) PRINTF("Cannot exceed %d threads.", MAX_THREADS);
 				options->build_threads = threads;
 				return;
 			}
@@ -837,7 +953,7 @@ static void parse_option(BuildOptions *options)
 					options->arch_os_target_override = target_arch_os;
 					return;
 				}
-				OUTPUT("Available targets:");
+				PRINTF("Available targets:");
 				EOUTPUT("Invalid target %s.", target);
 				EOUTPUT("These targets are supported:");
 				for (unsigned i = 1; i <= ARCH_OS_TARGET_LAST; i++)
@@ -868,7 +984,7 @@ static void parse_option(BuildOptions *options)
 			}
 			if (match_longopt("print-input"))
 			{
-				options->print_input = true; 
+				options->print_input = true;
 				return;
 			}
 			if (match_longopt("no-entry"))
@@ -930,9 +1046,19 @@ static void parse_option(BuildOptions *options)
 				options->win.def = next_arg();
 				return;
 			}
+			if ((argopt = match_argopt("vector-conv")))
+			{
+				options->vector_conv = (VectorConv)parse_multi_option(argopt, 2, vector_conv);
+				return;
+			}
 			if ((argopt = match_argopt("wincrt")))
 			{
-				options->win.crt_linking = (WinCrtLinking)parse_multi_option(argopt, 3, wincrt_linking);
+				options->win.crt_linking = (WinCrtLinking)parse_multi_option(argopt, 5, wincrt_linking);
+				return;
+			}
+			if ((argopt = match_argopt("sanitize")))
+			{
+				options->sanitize_mode = (SanitizeMode)parse_multi_option(argopt, 4, sanitize_modes);
 				return;
 			}
 			if (match_longopt("macos-sdk-version"))
@@ -992,23 +1118,24 @@ static void parse_option(BuildOptions *options)
 					if (str_has_suffix(name, ".c3l"))
 					{
 						error_exit("When specifying libraries, the .c3l suffix should"
-								   " not be included, so rather than '--lib %s', try using '--lib %s' instead.",
-								   name, str_remove_suffix(name, ".c3l"));
+						           " not be included, so rather than '--lib %s', try using '--lib %s' instead.",
+						           name, str_remove_suffix(name, ".c3l"));
 					}
 					if (str_has_suffix(name, ".lib") || str_has_suffix(name, ".a")
-						|| str_has_suffix(name, ".dll") || str_has_suffix(name, ".so"))
+					    || str_has_suffix(name, ".dll") || str_has_suffix(name, ".so"))
 					{
 						error_exit("You tried to add '%s' as a C3 library, but from the name it appears to be a"
-								   " static/dynamic library. To link with such a library, use '-l <name>' instead.",
-								   name);
+						           " static/dynamic library. To link with such a library, use '-l <name>' instead.",
+						           name);
 					}
 					char *name_copy = strdup(name);
 					str_ellide_in_place(name_copy, 32);
 					if (strchr(name, '/') != NULL || (PLATFORM_WINDOWS && strchr(name, '\\') != NULL))
 					{
-						error_exit("There is a problem including the library '%s': a library name should never contain the path. Use '--libdir' to add the "
-						           "directory to the library search paths, then use the plain name for '--lib', "
-						           "e.g '--libdir my_project/libs --lib some_lib'.", name_copy);
+						error_exit(
+								"There is a problem including the library '%s': a library name should never contain the path. Use '--libdir' to add the "
+								"directory to the library search paths, then use the plain name for '--lib', "
+								"e.g '--libdir my_project/libs --lib some_lib'.", name_copy);
 					}
 					error_exit("Invalid library name '%s', it should be something like 'foo_lib'.", name_copy);
 				}
@@ -1018,7 +1145,7 @@ static void parse_option(BuildOptions *options)
 			if (match_longopt("libdir"))
 			{
 				if (at_end() || next_is_opt()) error_exit("error: --libdir needs a directory.");
-				if (options->lib_dir_count == MAX_LIB_DIRS) error_exit("Max %d library directories may be specified.", MAX_LIB_DIRS);
+				if (options->lib_dir_count == MAX_BUILD_LIB_DIRS) error_exit("Max %d library directories may be specified.", MAX_BUILD_LIB_DIRS);
 				options->lib_dir[options->lib_dir_count++] = check_dir(next_arg());
 				return;
 			}
@@ -1080,7 +1207,6 @@ static void parse_option(BuildOptions *options)
 	FAIL_WITH_ERR("Cannot process the unknown option \"%s\".", current_arg);
 }

-
 BuildOptions parse_arguments(int argc, const char *argv[])
 {
 	arg_count = argc;
@@ -1098,6 +1224,7 @@ BuildOptions parse_arguments(int argc, const char *argv[])
 		.optsetting = OPT_SETTING_NOT_SET,
 		.debug_info_override = DEBUG_INFO_NOT_SET,
 		.safety_level = SAFETY_NOT_SET,
+		.panic_level = PANIC_NOT_SET,
 		.optlevel = OPTIMIZATION_NOT_SET,
 		.optsize = SIZE_OPTIMIZATION_NOT_SET,
 		.build_threads = cpus(),
@@ -1117,11 +1244,15 @@ BuildOptions parse_arguments(int argc, const char *argv[])
 		.linker_type = LINKER_TYPE_NOT_SET,
 		.strip_unused = STRIP_UNUSED_NOT_SET,
 		.single_module = SINGLE_MODULE_NOT_SET,
+		.sanitize_mode = SANITIZE_NOT_SET,
+		.unroll_loops = UNROLL_LOOPS_NOT_SET,
+		.merge_functions = MERGE_FUNCTIONS_NOT_SET,
+		.slp_vectorization = VECTORIZATION_NOT_SET,
+		.loop_vectorization = VECTORIZATION_NOT_SET,
 		.files = NULL,
 		.build_dir = NULL,
 		.output_dir = NULL,
 		.script_dir = NULL,
-
 	};
 	for (int i = DIAG_NONE; i < DIAG_WARNING_TYPE; i++)
 	{
@@ -1136,9 +1267,20 @@ BuildOptions parse_arguments(int argc, const char *argv[])
 		build_options.severity[i] = DIAG_ERROR;
 	}

+	bool collecting_args = false;
 	for (arg_index = 1; arg_index < arg_count; arg_index++)
 	{
 		current_arg = args[arg_index];
+		if (collecting_args)
+		{
+			append_arg(&build_options);
+			continue;
+		}
+		if (command_passes_args(build_options.command) && arg_match("--"))
+		{
+			collecting_args = true;
+			continue;
+		}
 		if (current_arg[0] == '-')
 		{
 			parse_option(&build_options);
@@ -1163,7 +1305,6 @@ BuildOptions parse_arguments(int argc, const char *argv[])
 	return build_options;
 }

-
 ArchOsTarget arch_os_target_from_string(const char *target)
 {
 	for (unsigned i = 1; i <= ARCH_OS_TARGET_LAST; i++)
--- a/Show More
+++ b/Show More