Tree.arrow: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/syntax/tree.bend as Tree
Lines 308-315 of bolt@1.27.0.0/src/syntax/tree.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/syntax/tree.bend&start_line=308&end_line=315

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

# does the chain after an `@` bind a name, `@x:` or with a quantity mark
# `@+x:`, as a dependent arrow does, rather than name an attribute (`@unsafe`)?
def arrow(rest: Node) -> Bool:
  match rest:
    case NCons{Leaf{Lex.Tok{Lex.TOp{}, _t, _l, _c}}, more}:
      arrow.named(more)
    case other:
      arrow.named(other)

Uses (5):
  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=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
  https://jend.leeeet.dev/definition.txt?path=bolt@1.27.0.0/src/syntax/tree.bend&name=arrow.named