- Temp allocator now supports more than 2 in-flight stacks.

- Printing stacktrace uses its own temp allocator.
- `@pool` no longer takes an argument.
- `Allocator` interface removes `mark` and `reset`.
- DynamicArenaAllocator has changed init function.
- Added `BackedArenaAllocator` which is allocated to a fixed size, then allocates on the backing allocator and supports mark/reset.

lib/std/io/io.c3

@@ -64,7 +64,7 @@ macro String? readline(Allocator allocator, stream = io::stdin())
 	$endif
 
 	if (val == '\n') return "";
-	@pool(allocator)
+	@pool()
 	{
 		DString str = dstring::temp_with_capacity(256);
 		if (val != '\r') str.append(val);

lib/std/io/os/ls.c3

@@ -29,7 +29,7 @@ fn PathList? native_ls(Path dir, bool no_dirs, bool no_symlinks, String mask, Al
 	PathList list;
 	list.init(allocator);
 
-	@pool(allocator)
+	@pool()
 	{
 		WString result = dir.str_view().tconcat(`\*`).to_temp_wstring()!!;
 		Win32_WIN32_FIND_DATAW find_data;
@@ -39,7 +39,7 @@ fn PathList? native_ls(Path dir, bool no_dirs, bool no_symlinks, String mask, Al
 		do
 		{
 			if (no_dirs && (find_data.dwFileAttributes & win32::FILE_ATTRIBUTE_DIRECTORY)) continue;
-			@pool(allocator)
+			@pool()
 			{
 				String filename = string::tfrom_wstring((WString)&find_data.cFileName)!;
 				if (filename == ".." || filename == ".") continue;

lib/std/io/os/temp_directory.c3

@@ -11,7 +11,7 @@ fn Path? native_temp_directory(Allocator allocator) @if(!env::WIN32)
 	return path::new(allocator, "/tmp");
 }
 
-fn Path? native_temp_directory(Allocator allocator) @if(env::WIN32) => @pool(allocator)
+fn Path? native_temp_directory(Allocator allocator) @if(env::WIN32) => @pool()
 {
 	Win32_DWORD len = win32::getTempPathW(0, null);
 	if (!len) return io::GENERAL_ERROR?;

lib/std/io/path.c3

@@ -28,7 +28,7 @@ enum PathEnv
 
 fn Path? cwd(Allocator allocator)
 {
-	@pool(allocator)
+	@pool()
 	{
 		return new(allocator, os::getcwd(tmem()));
 	};
@@ -153,7 +153,7 @@ fn Path? temp(String path, PathEnv path_env = DEFAULT_ENV)
 	return new(tmem(), path, path_env);
 }
 
-fn Path? from_win32_wstring(Allocator allocator, WString path) => @pool(allocator)
+fn Path? from_win32_wstring(Allocator allocator, WString path) => @pool()
 {
 	return path::new(allocator, string::tfrom_wstring(path)!);
 }
@@ -183,7 +183,7 @@ fn Path? Path.append(self, Allocator allocator, String filename)
 	if (!self.path_string.len) return new(allocator, filename, self.env)!;
 	assert(!is_separator(self.path_string[^1], self.env));
 
-	@pool(allocator)
+	@pool()
 	{
 		DString dstr = dstring::temp_with_capacity(self.path_string.len + 1 + filename.len);
 		dstr.append(self.path_string);
@@ -232,7 +232,7 @@ fn bool? Path.is_absolute(self)
 }
 
 
-fn Path? String.to_absolute_path(self, Allocator allocator) => @pool(allocator)
+fn Path? String.to_absolute_path(self, Allocator allocator) => @pool()
 {
 	return temp(self).absolute(allocator);
 }
@@ -247,14 +247,14 @@ fn Path? Path.absolute(self, Allocator allocator)
 	if (self.is_absolute()!) return new(allocator, path_str, self.env);
 	if (path_str == ".")
 	{
-		@pool(allocator)
+		@pool()
 		{
 			String cwd = os::getcwd(tmem())!;
 			return new(allocator, cwd, self.env);
 		};
 	}
 	$if DEFAULT_ENV == WIN32:
-		@pool(allocator)
+		@pool()
 		{
 			const usz BUFFER_LEN = 4096;
 			WString buffer = (WString)mem::talloc_array(Char16, BUFFER_LEN);
@@ -268,7 +268,7 @@ fn Path? Path.absolute(self, Allocator allocator)
 	$endif
 }
 
-fn String? String.file_basename(self, Allocator allocator) => @pool(allocator)
+fn String? String.file_basename(self, Allocator allocator) => @pool()
 {
 	return temp(self).basename().copy(allocator);
 }
@@ -285,7 +285,7 @@ fn String Path.basename(self)
 
 fn String? String.path_tdirname(self) => self.path_dirname(tmem());
 
-fn String? String.path_dirname(self, Allocator allocator) => @pool(allocator)
+fn String? String.path_dirname(self, Allocator allocator) => @pool()
 {
 	return temp(self).dirname().copy(allocator);
 }