Better lowering of distinct types. Noreturn function call expr recognized as a "jump" for escape analysis. Preferring "def" in libs. To upper / to lower for ascii. Initial dynlib support.

lib/std/core/allocators/arena_allocator.c3

@@ -103,7 +103,7 @@ fn void*! ArenaAllocator._alloc(ArenaAllocator* this, usz size, usz alignment, u
 	usz end = (usz)(aligned_pointer_to_offset - this.data.ptr) + size - offset;
 	if (end > total_len) return AllocationFailure.OUT_OF_MEMORY?;
 	this.used = end;
-	void *mem = aligned_pointer_to_offset - offset;
+	void* mem = aligned_pointer_to_offset - offset;
 	ArenaAllocatorHeader* header = mem - ArenaAllocatorHeader.sizeof;
 	header.size = size;
 	return mem;

lib/std/core/allocators/heap_allocator.c3

@@ -4,7 +4,7 @@
 
 module std::core::mem::allocator;
 
-typedef MemoryAllocFn = fn char[]!(usz);
+def MemoryAllocFn = fn char[]!(usz);
 
 struct SimpleHeapAllocator
 {

lib/std/core/allocators/tracking_allocator.c3

@@ -5,7 +5,7 @@
 module std::core::mem::allocator;
 import std::collections::map;
 
-typedef PtrMap = HashMap<uptr, usz>;
+def PtrMap = HashMap<uptr, usz>;
 
 // A simple tracking allocator.
 // It tracks allocations using a hash map but