proofs/tensor_cursor_witness.bend source

proofs/tensor_cursor_witness.bend on the hub · documented module

import Baseimport ../tensor_cursor.bend as Cursorimport ../traversal_array.bend as Traversalimport ./storage_witness.bend as Witnessimport ./traversal_witness.bend as TraversalWitnessimport ./traversal_visit_witness.bend as VisitWitnessdef read_value(~Element: Data,axes: Cursor.Levels(),address: U32,-storage: Array<Element>,-result: Array<Element> & Element,  observed: Witness.Read<Element,storage,result>) ->  VisitWitness.Sample<Array<Element>,Element,Cursor.Cursor,storage,Cursor.read_value(~Element,axes,address,result)>:  match observed:    case Witness.Read{value,equation}:      %Equal.sym(Array<Element> & Element,result,(storage,value),equation) :        VisitWitness.Sample<Array<Element>,Element,Cursor.Cursor,storage,Cursor.read_value(~Element,axes,address,_)>      VisitWitness.Sample{Cursor.advance(axes,address),value,{==}}def read(~Element: Data,-storage: Array<Element>,cursor: Cursor.Cursor,evidence: Witness.ArrayWitness<Element,storage>) ->  VisitWitness.Sample<Array<Element>,Element,Cursor.Cursor,storage,Cursor.read(~Element,storage,cursor)>:  Cursor.Cursor{axes,+address} = cursor  read_value(~Element,axes,address,storage,Array.get(Element,storage,address),Witness.observed(Element,storage,address,evidence))def stride_value(~Element: Data,address: U32,+stride: U32,-storage: Array<Element>,-result: Array<Element> & Element,  observed: Witness.Read<Element,storage,result>) ->  VisitWitness.Sample<Array<Element>,Element,Cursor.Stride,storage,Cursor.stride_value(~Element,address,stride,result)>:  match observed:    case Witness.Read{value,equation}:      %Equal.sym(Array<Element> & Element,result,(storage,value),equation) :        VisitWitness.Sample<Array<Element>,Element,Cursor.Stride,storage,Cursor.stride_value(~Element,address,stride,_)>      VisitWitness.Sample{Cursor.Stride{(address + stride : U32),stride},value,{==}}def read_stride(~Element: Data,-storage: Array<Element>,cursor: Cursor.Stride,evidence: Witness.ArrayWitness<Element,storage>) ->  VisitWitness.Sample<Array<Element>,Element,Cursor.Stride,storage,Cursor.read_stride(~Element,storage,cursor)>:  Cursor.Stride{+address,+stride} = cursor  stride_value(~Element,address,stride,storage,Array.get(Element,storage,address),Witness.observed(Element,storage,address,evidence))