First release of 0.6

Changes / improvements

• @default implementations for interfaces removed.
• any* => any, same for interfaces.
• Private / local globals now have internal visibility in LLVM.
• Updated enum syntax.
• 'rgba' also available for swizzling.
• The name "subarray" has been replaced by the more well known name "slice' across the codebase.
• Improved alignment handling.
• Add --output-dir to command line. #1155
• Allow making distinct types out of "void", "typeid", "anyfault" and faults.
• Removed --system-linker setting.
• "Try" expressions may not be any binary or unary expressions. So for example try foo() + 1 is disallowed.
• Added $$REGISTER_SIZE for int register size.
• assert(false) only allowed in unused branches or in tests. Compile time failed asserts is a compile time error.
• Require expression blocks returning values to have the value used.
• Detect "unsigned >= 0" as errors.
• Improve callstack debug information #1184.
• Request jump table using @jump for switches.
• Improved inline debug information.
• Improved error messages on inlined macros.
• Introduce MSVC compatible SIMD ABI.
• $foreach doesn't create an implicit syntactic scope.
• Error of @if depends on @if
• Support defer (catch err)
• Added print-input command argument to print all files used for compilation
• Allow recursive function definitions as long as they are pointers. #1182
• Default CPU to native if less than AVX, otherwise use AVX.
• Bounds checking on length for foo[1:2] slicing #1191.
• Foreach uses non-wrapping add/dec.

Fixes

• Fixed issue in safe mode when converting enums.
• Better checking of operator methods.
• Bug when assigning an optional from an optional.
• Lambdas were not type checked thoroughly #1185.
• Fix problems using reflection on interface types #1203.
• @param with unnamed macro varargs could crash the compiler.
• Compiler crash using enum nameof from different module #1205.
• Incorrect length passed to scratch buffer printf.
• Casting to a bitstruct would be allowed even if the type was the wrong size.
• Generic modules parameterized with constants would sometimes get the wrong parameterized module name causing conversion errors #1192.
• Duplicate emit of expressions on negation would incorrectly compile negated macros.
• Casting a slice address to its pointer type should not compile #1193.
• Union is not properly zero-initialized with designated initializer #1194.
• Compile time fmod evaluates to 0 #1195.
• Assertion failed when casting (unsigned) argument to enum #1196
• Correct debug info on parameters without storage.
• Fix location on foreach debug output.
• Compiler crash on designated initializer for structs with bitstruct.

Stdlib changes

• "init_new/init_temp" removed.
• LinkedList API rewritten.
• List "pop" and "remove" function now return Optionals.
• RingBuffer API rewritten. Allocator interface changed.
• Deprecated Allocator, DString and mem functions removed.
• "identity" functions are now constants for Matrix and Complex numbers.
• Removed 'append' from Object and List, replaced by 'push'.
• GenericList renamed AnyList.
• Proper handling of '.' and Win32 '//server' paths.
• Path normalization - fix possible null terminator out of bounds.
• Add 'zstr' variants for string::new_format / string::tformat.
• Fix mutex and wait signatures for Win32.