UnneededPlus.matched.visit: def of bend-lint-rules@0.2.0.0
Import: import bend-lint-rules@0.2.0.0/language/unneeded_plus.bend as UnneededPlus
Lines 43-66 of bend-lint-rules@0.2.0.0/language/unneeded_plus.bend: https://jend.leeeet.dev/read.txt?path=bend-lint-rules@0.2.0.0/language/unneeded_plus.bend&start_line=43&end_line=66

import Base
import bend-lint-api@0.2.0.0/linter/lint.bend as Lint
import bend-lint-api@0.2.0.0/shared/lists.bend as Lists

# The binder a variable below `path` uses, if it is taken apart there: it is a match's scrutinee, or the value of a let
# with a constructor pattern (`Vert{x, y} = v`).
def matched.visit(+u: Unit, +path: List<&2, Lint.Above>, +node: Lint.Node) -> List<&2, U32>:
  match path node:
    case Con{
      Lint.Above{Lint.Node{Lint.Match{}, n, s, k, f}, at},
      up
    } Lint.Node{Lint.Variable{b}, vn, vs, vk, vf}:
      [b]
    case Con{
      Lint.Above{Lint.Node{Lint.Destructure{q}, n, s, +kids, f}, +at},
      up
    } Lint.Node{Lint.Variable{b}, vn, vs, vk, vf}:
      Bool.pick(
        List<&2, U32>,
        Bool.not(
          U32.is_eq((at + 1: U32), U32.from_nat(Lists.length(&2, Lint.Node, kids)))
        )
          && is_constructed(kids),
        [b],
        []
      )
    case _ _:
      []

Uses (14):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.not
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.from_nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Unit
  https://jend.leeeet.dev/definition.txt?path=bend-lint-api@0.2.0.0/linter/lint.bend&name=Above
  https://jend.leeeet.dev/definition.txt?path=bend-lint-api@0.2.0.0/linter/lint.bend&name=Node
  https://jend.leeeet.dev/definition.txt?path=bend-lint-api@0.2.0.0/linter/lint.bend&name=Syntax
  https://jend.leeeet.dev/definition.txt?path=bend-lint-api@0.2.0.0/shared/lists.bend&name=length
  https://jend.leeeet.dev/definition.txt?path=bend-lint-rules@0.2.0.0/language/unneeded_plus.bend&name=is_constructed