UnneededPlus.is_needless: 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 110-122 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=110&end_line=122

import Base

# Whether a `+` binder its body uses at most once (`once`) needs no `+`: not if a match takes it apart, nor if it is a
# parameter of a definition used as a value: the type it must have can ask for the `+`.
def is_needless(once: Bool, parameter: Bool, owner: Owner, b: U32) -> Bool:
  match once parameter owner:
    case True{} True{} Owner{values, target, matched}:
      Bool.not(
        List.contains(~String, ~String.eq, values, target)
      )
        && Bool.not(List.contains(~U32, ~U32.is_eq, matched, b))
    case True{} False{} Owner{values, target, matched}:
      Bool.not(List.contains(~U32, ~U32.is_eq, matched, b))
    case _ _ _:
      False{}

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  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=List.contains
  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=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=bend-lint-rules@0.2.0.0/language/unneeded_plus.bend&name=Owner