Odin Files

New Language Features

• Fixed Capacity Dynamic Arrays, adds [dynamic; N]T

New Compiler Improvements

• Limit maximum exponent of integer literals to avoid unnecessary work
• Add -in-source-order option to odin doc to show docs in source order within each file
• Support clang-style +/- prefixes in target features
• Fix [#6396]: handle full-width bit_field literal masks
• Fix [#6401]: generic cycle deadlock in struct layout
• Add support for other Android architectures
• Fix [#5602]: "Internal Compiler Error: Type_Info for 'x' could not be found" for poly procs with named parameters
• Continuous Compiler Improvements
• Add initial LLVM 22 support on non-Windows platforms
• More accurate -march:native feature selection
• Allow pointers to types which have subtype fields at offset 0 to be assignable in proc parameters.
• offset_of(some_bit_field) now raises a proper error
• Add intrinsics.type_field_bit_offset(typeid, string) to get a compile-time bit_field field offset in bits
• Add intrinsics.type_field_bit_size(typeid, string) to get a compile-time bit_field field size in bits (the value after |)
• Fix [#6407]: Global unions do not get initialized correctly
• Fix >= comparison base:runtime dependencies for string and cstring types
• Fix GB_PANIC format string in lb_emit_conv invalid subtype cast
• Fix [^]u16 to cstring16 transmute condition in lb_emit_conv
• Remove Tilde backend
• Fix [#6484]: Two when blocks which evaluate to true in a foreign block misses following decls
• Fix declaration order bug [#6506]: False-positive where-clause failures in recursive polymorphic subtype cases
• Fix declaration order bugs [#5572] and [#5961]: Incorrectly rejecting valid in-progress/forward union references

New Packages

• core:crypto/argon2id initial import
• vendor:windows/wasapi
• vendor:sdl3/mixer

Package Improvements

• Add more JS to examples/all
• Update Unicode database to newer version
• Fix modular exponentiation in core:math/big
• Fix assign_at documentation
• core:fmt now formats time.Duration with a space between duration and unit when using % v
• Correct SIMD shr example documention
• Fix sync.Auto_Reset_Event signal deadlock
• core:sys/darwin/Foundation: fix NSTimer binding
• Partial 1.619.x d3d12 bindings
• core:mem/virtual: Fix for virtual arena overcommit bug [#5821]
• core:crypto: Add ARM AES hardware acceleration
• core:crypto: Add ARM SHA256 hardware acceleration
• core:fmt: Improve core:container/small_array formatting
• vendor:stb/vorbis: Add WASM support
• core:encoding/cbor: Fix order-dependent partial unmarshals
• core:encoding/json: Fix user unmarshaler example
• Fix possible OOM in core:os.get_working_directory() on Linux
• Fix [#6455]: core:mem/virtual.map_file_from_path ignores flags
• Fix for corner case in the core:mem scratch allocator.
• Minor cleanup in base:runtime and core:mem
• Fix [#6495]: Handle starting separator during name comparison in core:os
• Improved delete_key documentation to mention it's safe to delete keys while iterating a map as long as no resizes take place
• Fix source size check in core:crypto/aes ECB encrypt/decrypt

Full Change Log

Full Changelog: https://github.com/odin-lang/Odin/compare/dev-2026-03...dev-2026-04