MatmulPROOF.plan_left_rank: def of bendtorch-core@0.1.0.0
Import: import bendtorch-core@0.1.0.0/src/tensor/matmul_PROOF.bend as MatmulPROOF
Lines 1135-1148 of bendtorch-core@0.1.0.0/src/tensor/matmul_PROOF.bend: https://jend.leeeet.dev/read.txt?path=bendtorch-core@0.1.0.0/src/tensor/matmul_PROOF.bend&start_line=1135&end_line=1148

import Base
import bendtorch-core@0.1.0.0/src/shape/core.bend as Shape
import bendtorch-core@0.1.0.0/src/tensor/matmul.bend as Matrix

def plan_left_rank(+left: Shape.Shape, +right: Shape.Shape, +dims: List<&2, U32>,
  -same: {dims == Shape.dimensions(left) : List<&2, U32>},
  not_matrix: {Shape.rank_dimensions(dims) != 2n : Nat}) ->
  {Matrix.plan_left(left, right, dims, same) == Fail{Matrix.RankMismatch{}} : Result<&2, &2, Matrix.Error, Matrix.Plan<left, right>>}:
  match dims:
    case Nil{}:
      {==}
    case +x <> Nil{}:
      {==}
    case +rows <> +inner <> Nil{}:
      Empty.absurd({Matrix.plan_left(left, right, [rows, inner], same) == Fail{Matrix.RankMismatch{}} : Result<&2, &2, Matrix.Error, Matrix.Plan<left, right>>},
        not_matrix({==}))
    case +x <> +y <> +z <> +t:
      {==}

Uses (12):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Empty
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Empty.absurd
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=List
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Result
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  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=rank_dimensions
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/matmul.bend&name=Error
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/matmul.bend&name=Plan
  https://jend.leeeet.dev/definition.txt?path=bendtorch-core@0.1.0.0/src/tensor/matmul.bend&name=plan_left