Concat.uses: def of bolt@1.27.0.0
Import: import bolt@1.27.0.0/src/rules/suspicious/concat.bend as Concat
Lines 261-273 of bolt@1.27.0.0/src/rules/suspicious/concat.bend: https://jend.leeeet.dev/read.txt?path=bolt@1.27.0.0/src/rules/suspicious/concat.bend&start_line=261&end_line=273

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

# how many times a plain name is read under the node
def uses(nn: Tree.Node, +name: String) -> Nat:
  match nn:
    case Tree.NCons{h, rest}:
      Nat.add(uses(h, name), uses(rest, name))
    case Tree.Group{open, kids, close}:
      uses(kids, name)
    case Tree.Stmt{kind, kids, body}:
      Nat.add(uses(kids, name), uses(body, name))
    case Tree.Leaf{Lex.Tok{Lex.TName{}, +t, l, c}}:
      Bool.pick(Nat, String.eq(t, name), 1n, 0n)
    case other:
      0n

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String.eq
  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