BendTensors.MatT.sum: def of bend-tensors@0.0.0.2
Import: import bend-tensors@0.0.0.2/bend_tensors.bend as BendTensors
Lines 923-940 of bend-tensors@0.0.0.2/bend_tensors.bend: https://jend.leeeet.dev/read.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&start_line=923&end_line=940

import Base

# the sum of every cell
def MatT.sum(+r: Nat, +c: Nat, m: MatT(r, c)) -> F32:
  match r c:
    case 0n 0n:
      MatB{b} = m
      Blk.sum(b)
    case 1n+p 0n:
      MatR{t, b} = m
      x y = MatT.sum(p, 0n, t) MatT.sum(p, 0n, b)
      (x + y : F32)
    case 0n 1n+q:
      MatC{l, r2} = m
      x y = MatT.sum(0n, q, l) MatT.sum(0n, q, r2)
      (x + y : F32)
    case 1n+p 1n+q:
      MatQ{a, b, c2, d} = m
      w x y z = MatT.sum(p, q, a) MatT.sum(p, q, b) MatT.sum(p, q, c2) MatT.sum(p, q, d)
      ((w + x) + (y + z) : F32)

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=F32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=Blk.sum
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Cols
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Leaf
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Quad
  https://jend.leeeet.dev/definition.txt?path=bend-tensors@0.0.0.2/bend_tensors.bend&name=MatT.Rows