TransformPROOF.present_observation: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/tensor/transform_PROOF.bend as TransformPROOF
Lines 1222-1244 of bendtorch-core@0.1.0.0/src/tensor/transform_PROOF.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/tensor/transform_PROOF.bend&start_line=1222&end_line=1244

import Base
import bendtorch-core@0.1.0.0/src/shape/core.bend as Shape
import bendtorch-core@0.1.0.0/src/tensor/core.bend as Core
import bendtorch-core@0.1.0.0/src/storage/main.bend as Storage
import bendtorch-core@0.1.0.0/src/storage/model.bend as Model
import bendtorch-core@0.1.0.0/src/storage/refinement.bend as Refinement
import bendtorch-core@0.1.0.0/src/storage/arith.bend as Arith
import bendtorch-core@0.1.0.0/src/storage/route.bend as Route

def present_observation(+shape: Shape.Shape, tensor: Core.Tensor<shape>, +index: U32,
  -inside: {Nat.is_lt(U32.to_nat(index), Shape.logical_numel(Shape.dimensions(shape))) == True{} : Bool}) ->
  PresentObservation<shape, tensor, index>:
  Core.TTensor{storage, exact} = tensor
  match storage:
    case Storage.Empty{}:
      present_impossible(shape, Core.TTensor{Storage.Empty{}, exact}, index,
        Arith.lt_zero(U32.to_nat(index),
          %Equal.sym(Nat, 0n, Shape.logical_numel(Shape.dimensions(shape)), exact) : {Nat.is_lt(U32.to_nat(index), _) == True{} : Bool}
          inside))
    case Storage.Owned{+depth, +length, array, balanced, valid}:
      PresentObservation{Refinement.second(F32, Array.get(F32, array, index)),
        Equal.trans(Maybe<&2, F32>, Core.checked_observe(shape, Core.TTensor{Storage.Owned{depth, length, array, balanced, valid}, exact}, index),
          Model.observe(F32, depth, array, Refinement.route(depth, index)), Some{Refinement.second(F32, Array.get(F32, array, index))},
          observe_allowed_equal(depth, length, array, index, Nat.is_lt(U32.to_nat(index), length),
            %Equal.sym(Nat, length, Shape.logical_numel(Shape.dimensions(shape)), exact) : {Nat.is_lt(U32.to_nat(index), _) == True{} : Bool}
            inside,
            Equal.sym(Bool, True{}, Storage.index_matches(depth, length, index),
              Route.index_complete(depth, length, index, valid,
                %Equal.sym(Nat, length, Shape.logical_numel(Shape.dimensions(shape)), exact) : {Nat.is_lt(U32.to_nat(index), _) == True{} : Bool}
                inside))),
          Equal.sym(Maybe<&2, F32>, Some{Refinement.second(F32, Array.get(F32, array, index))},
            Model.observe(F32, depth, array, Refinement.route(depth, index)), Refinement.law_get_refines(F32, depth, array, index, balanced)))}

Uses (26):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array.get
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.sym
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Equal.trans
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.is_lt
  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=bendtorch-core@0.1.0.0/src/shape/core.bend&name=Shape
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=dimensions
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/shape/core.bend&name=logical_numel
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/arith.bend&name=lt_zero
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/main.bend&name=Storage
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/main.bend&name=index_matches
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/model.bend&name=observe
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/refinement.bend&name=law_get_refines
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/refinement.bend&name=route
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/refinement.bend&name=second
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/storage/route.bend&name=index_complete
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/core.bend&name=Tensor
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/core.bend&name=checked_observe
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/transform_PROOF.bend&name=PresentObservation
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/transform_PROOF.bend&name=observe_allowed_equal
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/transform_PROOF.bend&name=present_impossible