Rewalk.eat: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/rules/pedantic/rewalk.bend as Rewalk
Lines 599-612 of bolt@1.27.0.0/src/rules/pedantic/rewalk.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/rules/pedantic/rewalk.bend&start_line=599&end_line=612

import Base
import bolt@1.27.0.0/src/syntax/lex.bend as Lex
import bolt@1.27.0.0/src/syntax/tree.bend as Tree

# the left of `=`
def eat(nn: Tree.Node, st: Lhs) -> Lhs:
  match nn:
    case Tree.NCons{Tree.Leaf{Lex.Tok{Lex.TEq{}, t, l, c}}, rest}:
      st
    case Tree.NCons{Tree.Leaf{Lex.Tok{Lex.TName{}, +t, l, c}}, rest}:
      Lhs{seen, extra, field, nm} = st
      eat(rest, add_seen(seen, extra, field, nm, t))
    case Tree.NCons{Tree.Group{open, +kids, close}, rest}:
      eat(rest, fold_names(kids, st))
    case Tree.NCons{h, rest}:
      eat(rest, st)
    case other:
      st

Uses (6):
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/rules/pedantic/rewalk.bend&name=Lhs
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/rules/pedantic/rewalk.bend&name=add_seen
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/rules/pedantic/rewalk.bend&name=fold_names
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/lex.bend&name=Tok
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/lex.bend&name=TokKind
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/tree.bend&name=Node