New Language Features

• bit_field type

Foo :: bit_field u16 { // backing type must be an integer or array of integers
    x: i32     | 3, // signed integers will be signed extended on use
    y: u16     | 2 + 3, // general expressions
    z: My_Enum | foo.SOME_CONSTANT, // ability to define the bit-width elsewhere
    w: bool    | foo.SOME_CONSTANT > 10 ? 2 : 1,
}

Handle :: bit_field u32 {
    slot:       u32  | 16,
    generation: u32  | 15,
    in_use:     bool |  1,
}

• name: type | bit_width
• name: type | bit_width "field_tag" (similar to a struct field with a tag)

Compiler Improvements

• Improved Error Reporting System
  • Sorted printing based on error position
  • Ability to export error list to json -json-errors
  • -terse-errors are only a single line now
• Error message suggestions for people making common C mistakes
  • Aiding newcomers from C/C++ to Odin
• Loads of debug info refactors and improvements
• Add Haiku OS support by @avanspector in https://github.com/odin-lang/Odin/pull/3230
• Respect "smart linker" approaches
• Respect -lld on non-Windows machines
• Remove entry point when compiled with no-entry-point as shared library
• Numerous fixes to wasm targets
• Numerous fixes to ARM64 ABI on Darwin
• Numerous fixes to SysV AMD64 ABI on Darwin and Linux
• Speed up path_to_fullpath on Linux/macOS
• Numerous compiler fixes and error messages

New Packages

• Moved vendor:darwin/Foundation to core:sys/darwin/Foundation

Package Improvements

• Improvements to core:crypto
• Make raylib and stb_rect_pack be free of libc
• Numerous improvements to core:encoding/json
  • Support writing enum value names
  • Support for using _: T fields
• Fixes to core:math/big
• Fixes to core:math/linalg
• Fixes to core:slice
• Fixes to core:odin/parser
• General fixes to base:runtime
• vendor:x11 fixes
• Allow for the new futex API on darwin platforms if it is available
• Fix os.read_entire_file for pipes and console

CI Improvements

• Update LLVM to 17 for the CI/Releases

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2024-03...dev-2024-04