better matching for parens - Githubissues

mattwparas / steel

An embedded scheme interpreter in Rust

Apache License 2.0

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better matching for parens #223

Closed jrvidal closed 3 weeks ago

jrvidal commented 3 weeks ago

Different types of parenthesis match each other e.g. (a 1] is forbidden:

λ > (a]
error[E09]: Parse
┌─ :1:3
│
1 │ (a]
│   ^ Parse: Unexpected token: CloseParen(Square)

Refactored paren highlighting in the REPL.
Validator in the REPL is more precise now. For instance, ( "asdf)" was not recognized as an incomplete expression.