tree 6d5086d7146fe6017e6218c4a48ed1b91072ad49
parent 5337c2bc7ab93112e7edd4c772d98987ba596e49
author Sketch🕴️ <skallywag@sketch.dev> 1772297113 +0400
committer Sketch🕴️ <skallywag@sketch.dev> 1772297113 +0400

lexer: recognize identifiers, comma, and equals tokens

- Add identifier scanning: starts with letter/underscore, continues with
  letters/digits/underscores. Produces Ident tokens.
- Add comma and equals to single-char token switch.
- Add isLetter() helper.
- Add 9 new tests covering: single ident, multi-char ident, ident with
  digits, ident with underscore, comma, equals, function definition
  syntax, function call with args, multi-param func def, func call in
  expression.