0.3.0 #

Released on: 12 July, 2012
Branched from master on: 4 December, 2015

~1900 changes, numerous bugfixes
- New coding conveniences
  - Integer-literal suffix inference
  - Per-item control over warnings, errors
  - #[cfg(windows)] and #[cfg(unix)] attributes
  - Documentation comments
  - More compact closure syntax
  - ‘do’ expressions for treating higher-order functions as control structures
  - *-patterns (wildcard extended to all constructor fields)
- Semantic cleanup
  - Name resolution pass and exhaustiveness checker rewritten
  - Region pointers and borrow checking supersede alias analysis
  - Init-ness checking is now provided by a region-based liveness pass instead of the typestate pass; same for last-use analysis
  - Extensive work on region pointers
- Experimental new language features
  - Slices and fixed-size, interior-allocated vectors
  - #!-comments for lang versioning, shell execution
  - Destructors and iface implementation for classes; type-parameterized classes and class methods
  - ‘const’ type kind for types that can be used to implement shared-memory concurrency patterns
- Type reflection
- Removal of various obsolete features
  - Keywords: ‘be’, ‘prove’, ‘syntax’, ’note’, ‘mutable’, ‘bind’, ‘crust’, ’native’ (now ’extern’), ‘cont’ (now ‘again’)
  - Constructs: do-while loops (‘do’ repurposed), fn binding, resources (replaced by destructors)
- Compiler reorganization
  - Syntax-layer of compiler split into separate crate
  - Clang (from LLVM project) integrated into build
  - Typechecker split into sub-modules
- New library code
  - New time functions
  - Extension methods for many built-in types
  - Arc: atomic-refcount read-only / exclusive-use shared cells
  - Par: parallel map and search routines
  - Extensive work on libuv interface
  - Much vector code moved to libraries
  - Syntax extensions: #line, #col, #file, #mod, #stringify, #include, #include_str, #include_bin
- Tool improvements
  - Cargo automatically resolves dependencies