TensorOperations.copy_when: def of stelliferous@0.0.2.0
Import: import stelliferous@0.0.2.0/tensor_operations.bend as TensorOperations
Lines 30-41 of stelliferous@0.0.2.0/tensor_operations.bend: https://jend.leeeet.dev/read.txt?path=stelliferous@0.0.2.0/tensor_operations.bend&start_line=30&end_line=41

import Base
import stelliferous@0.0.2.0/storage_buffer.bend as Storage
import stelliferous@0.0.2.0/tensor_view.bend as Views
import stelliferous@0.0.2.0/tensor_access.bend as Access
import stelliferous@0.0.2.0/proofs/tensor_access_certificate.bend as AccessCertificate

def copy_when(~Element: Data,valid: Bool,count: Maybe<&2,U32>,+source: Views.View,target: Views.View,
  input: Storage.Buffer<Element>,output: Storage.Buffer<Element>) -> Outcome<(Storage.Buffer<Element> & Storage.Buffer<Element>)>:
  match valid count:
    case True{} Some{+count}:
      Views.View{axes,+offset} = target
      Storage.Buffer{input,input_length,input_certificate} = input
      Storage.Buffer{output,output_length,output_certificate} = output
      +contiguous = Views.is_contiguous(source)
      Accepted{pair_buffers(~Element,input_length,output_length,
        Access.copy_run(~Element,contiguous,U32.to_nat(count),source,offset,input,output),
        AccessCertificate.copy(~Element,contiguous,U32.to_nat(count),source,offset,input,output,input_certificate,output_certificate))}
    case valid count: Rejected{(input,output)}

Uses (13):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/proofs/tensor_access_certificate.bend&name=copy
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/storage_buffer.bend&name=Buffer
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/tensor_access.bend&name=copy_run
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/tensor_operations.bend&name=Outcome
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/tensor_operations.bend&name=pair_buffers
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/tensor_view.bend&name=View
  https://jend.leeeet.dev/definition.txt?path=stelliferous@0.0.2.0/tensor_view.bend&name=is_contiguous