Lex.is_open: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/syntax/lex.bend as Lex
Lines 336-342 of bolt@1.27.0.0/src/syntax/lex.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/syntax/lex.bend&start_line=336&end_line=342

import Base

# an opening bracket?
def is_open(kk: TokKind) -> Bool:
  match kk:
    case TOpen{}:
      True{}
    case other:
      False{}

Uses (2):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/lex.bend&name=TokKind