Changes / improvements

• Added const enums: enum Foo : const. Behaves like C enums but may be any type.
• Casting to / from an enum is now possible again. No need to use .ordinal and .from_ordinal.
• Inline associated enum values are deprecated, use --use-old-enums to re-enable them.
• $typeof may return a compile time type.
• Improved error messages on missing qualifier on enum value. #2260
• Add --echo-prefix to edit the prefix with $echo statements. Supports {FILE} and {LINE}
• Catch accidental foo == BAR; where foo = BAR; was most likely intended. #2274
• Improve error message when doing a rethrow in a function that doesn't return an optional.
• Add --list-asm to view all supported asm instructions.
• Formatting option "%h" now supports pointers.
• Improve error on unsigned implicit conversion to signed.
• Update error message for struct initialization #2286
• Add SipHash family of keyed PRFs. #2287
• $is_const is deprecated in favour of @is_const based on $defined.
• Multiline contract comments #2113
• Removed the use of temp allocator in backtrace printing.
• env::AUTHORS and env::AUTHOR_EMAILS added.
• Suppress codegen of panic printing with when panic messages are set to "off".
• Implicit linking of libc math when libc math functions are used.
• Allow even smaller memory limits.
• Check unaligned array access.
• Add "@structlike" for typedefs.
• "poison" the current function early when a declaration can't be correctly resolved.
• Add komihash, a5hash, metrohash64, metrohash128, and wyhash2 variants with tests/benchmark. #2293
• '$assignable' is deprecated.
• Deprecate allocator::heap() and allocator::temp()
• Add thread::fence providing a thread fence.
• Place output in out by default for projects. Use temp folder for building at the command line.
• Allow absolute paths for $embed.
• Add @try and @try_catch.
• Assignment evaluation order now right->left, following C++17 and possibly C23.

Fixes

• mkdir/rmdir would not work properly with substring paths on non-windows platforms.
• Hex string formatter check incorrectly rejected slices.
• Correctly reject interface methods type and ptr.
• Comparing a null ZString with a non-null ZString would crash.
• Switch case with const non-int / enum would be treated as ints and crash. #2263
• Missing bounds check on upper bound with const ranges foo[1:3].
• Check up the hierarchy when considering if an interface cast is valid #2267.
• Fix issue with labelled break inside of a $switch.
• Non-const macros may not return untyped lists.
• $for ct-state not properly popped.
• Inline r / complex for complex numbers fixed.
• Const slice lengths were not always detected as constant.
• Const slice indexing was not bounds checked.
• Initialize pool correctly in print_backtrace.
• --max-mem now works correctly again.
• Casting a fault to a pointer would trigger an assert.
• Make to_float more tolerant to spaces.
• Fixes to thread local pointer handling.
• Fixes to JSON parsing and Object.
• Array indices are now using int64 internally.
• Bit shift operation fails with inline uint enum despite matching underlying type #2279.
• Fix to codegen when using a bitstruct constant defined using a cast with an operator #2248.
• Function pointers are now compile time constants.
• Splat 8 arguments can sometimes cause incorrect behaviour in the compiler. #2283
• Correctly poison the analysis after a failed $assert or $error. #2284
• $foo variables could be assigned non-compile time values.
• $foo[0] = ... was incorrectly requiring that the assigned values were compile time constants.
• "Inlined at" would sometimes show the current location.
• Fixed bug splatting constants into constants.
• Resize bug when resizing memory down in ArenaAllocator, DynamicArenaAllocator, BackedArenaAllocator.
• Error message for missing arg incorrect for methods with zero args #2296.
• Fix stringify of $vaexpr #2301.
• Segfault when failing to cast subexpression to 'isz' in pointer subtraction #2305.
• Fix unexpected display of macro definition when passing a poisoned expression #2305.
• @links on macros would not be added to calling functions.
• Fix Formatter.print returning incorrect size.
• A distinct type based on an array would yield .len == 0
• Overloading addition with a pointer would not work.
• Copying const enums and regular enums incorrect #2313.
• Regression: Chaining an optional together with contracts could in some cases lose the optional.
• char[*] b = *(char[*]*)&a; would crash the compiler if a was a slice. #2320
• Implicitly cast const int expressions would sometimes not be detected as compile time const.
• Using @NoReturn in a short body macro would not work properly #2326.
• Bug when reporting error in a macro return would crash the compiler #2326.
• Short body return expression would not have the correct span.
• Fix issue where recursively creating a dir would be incorrectly marked as a failure the first time.
• @format did not work correctly with macros #2341.
• Crash when parsing recursive type declaration #2345.
• Remove unnecessary "ret" in naked functions #2344.
• Lambdas now properly follow its attributes #2346.
• Not setting android-ndk resulted in a "set ndk-path" error.
• Lambda deduplication would be incorrect when generated at the global scope.
• Disallow accessing parameters in a naked function, as well as return, this fixes #1955.
• Assigning string literal to char[<*>] stores pointer rather than characters. #2357

Stdlib changes

• Improve contract for readline. #2280
• Added Whirlpool hash.
• Added Ed25519.
• Added string::bformat.
• Virtual memory library.
• New virtual emory arena allocator.
• Added WString.len.
• Added @addr macro.
• Add ConditionVariable.wait_until and ConditionVariable.wait_for
• Added readline_to_stream that takes a stream.
• Added Ref and RefCounted experimental functionality.
• Added Volatile generic type.
• Added UnalignedRef generic type.
• Add String conversion functions snake_case -> PascalCase and vice versa.