Core.key_err: def of bend-schema-lib@0.4.1.0
Import: import bend-schema-lib@0.4.1.0/core.bend as Core
Lines 471-481 of bend-schema-lib@0.4.1.0/core.bend: https://jend.leeeet.dev/read.txt?path=bend-schema-lib@0.4.1.0/core.bend&start_line=471&end_line=481

import Base

# The repeated key as check reports it: at the key's own name, with no step
# after it (the second occurrence is not a place in the schema). The test is
# passed in rather than read here (a match cannot scrutinize a computed value):
# b is key_once(name, r), so nothing is reported exactly when key_once holds,
# which is what check_exact needs.
def key_err(b: Bool, +name: String) -> Maybe<&2, Err>:
  match b:
    case True{}:
      None{}
    case False{}:
      Some{Err{AtField{0n, name} <> Nil{}, RepeatedKey{name}}}

Uses (7):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=Err
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=Step
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=Why