crystal
https://github.com/crystal-lang/crystal
Crystal
The Crystal Programming Language
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- Issues
- Interpreter: `nil` fails `is_a?` and `as` against a nilable type
- Match nil against a nilable type in reference_is_a in the interpreter
- Macro method returning the unmerged type of a union alias
- Semantic pass slows down quadratically with many instances of a generic class under an abstract type
- Speed up method lookup on virtual types with many subtypes
- Performance slowdown as more generic subclasses instances are defined
- A subclass of a generic instance can't use inherited constructors that name a type from the parent's namespace
- Resolve inherited constructor restrictions in the parent's namespace
- Raise `ArgumentError` on negative `IO#skip`
- Enable LLVM function merging for optimized builds
- Docs
- Crystal not yet supported