TraversalVisitWitness.step: def of stelliferous@0.0.2.0
Import: import stelliferous@0.0.2.0/proofs/traversal_visit_witness.bend as TraversalVisitWitness
Lines 20-30 of stelliferous@0.0.2.0/proofs/traversal_visit_witness.bend: https://jend.leeeet.dev/read.txt?path=stelliferous@0.0.2.0/proofs/traversal_visit_witness.bend&start_line=20&end_line=30

import Base
import stelliferous@0.0.2.0/traversal_array.bend as Traversal
import stelliferous@0.0.2.0/proofs/traversal_witness.bend as TraversalWitness

def step(~Reader: Type,~Element: Data,~Context: Data,~ReaderEvidence: @-reader: Reader -> Data,
  ~read: Reader -> Context -> Reader & Traversal.Visited<Context,Element>,
  ~read_preserves: @-reader: Reader -> @context: Context -> ReaderEvidence(reader) -> Sample<Reader,Element,Context,reader,read(reader,context)>,
  +depth: Nat,-reader: Reader,-state: Traversal.State<&1,&1,Reader,Array<Element>,Context>,reader_evidence: ReaderEvidence(reader),
  evidence: TraversalWitness.StateEvidence<Reader,Element,Context,reader,depth,state>) ->
  TraversalWitness.StateEvidence<Reader,Element,Context,reader,depth,Traversal.visit_step(~Reader,~Element,~Context,~read,state)>:
  match evidence:
    case TraversalWitness.StateEvidence{output,position,context,equation,output_evidence}:
      %Equal.sym(Traversal.State<&1,&1,Reader,Array<Element>,Context>,state,Traversal.State{reader,output,position,context},equation) :
        TraversalWitness.StateEvidence<Reader,Element,Context,reader,depth,Traversal.visit_step(~Reader,~Element,~Context,~read,_)>
      store(~Reader,~Element,~Context,depth,reader,position,output,read(reader,context),output_evidence,read_preserves(reader,context,reader_evidence))

Uses (10):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/proofs/traversal_visit_witness.bend&name=Sample
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/proofs/traversal_visit_witness.bend&name=store
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/proofs/traversal_witness.bend&name=StateEvidence
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/traversal_array.bend&name=State
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/traversal_array.bend&name=Visited
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/traversal_array.bend&name=visit_step