cl-ast: No more bare ExprKind: every Expr has a Span
cl-interpret: Give errors a span
cl-repl: Print eval errors in load_file, instead of returning them. These changes are relevant.
- Everything is different now
- Builtins are now built on top of Rust functions, so they can be recursive!
- TODO: allow macro-defined builtins to call each other?
- The builtins! macro is a lot nicer to work with
- No redundant return value
- Maps the result over Into::into, allowing for type inference!
- Uses explicit pattern syntax instead of weird binding, where possible
- Does not #[allow(unused)], so you'll get unused variable warnings now!
- Integrate the Match and Pattern nodes into the AST
- TODO: `let x: T` is ambiguous with `let x: {}`. Currently the latter takes precedence in the parser.
- Implement pattern matching through unification in the interpreter.
- It's not fast, but it works!
- Refactor destructuring assignments to use the new pattern functionality
