Core.dup_err: def of bend-schema-lib@0.4.1.0
Import: import bend-schema-lib@0.4.1.0/core.bend as Core
Lines 809-815 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=809&end_line=815

import Base

# A second key of a variant chain in the object r: the first one found.
def dup_err(s: Schema, +r: Raw) -> Maybe<&2, Err>:
  match s:
    case SVariant{+n, vs, rest}:
      pick_err(is_missing(lookup(n, r)), later_f(dup_err(rest, r)), Some{Err{AtField{0n, n} <> Nil{}, TwoVariants{}}})
    case _:
      None{}

Uses (11):
  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=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=Raw
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=Schema
  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
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=is_missing
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=later_f
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=lookup
  https://jend.leeeet.dev/definition.txt?path=bend-schema-lib@0.4.1.0/core.bend&name=pick_err