ProofSums.rsum: def of minebender-game@1.0.0.0
Import: import minebender-game@1.0.0.0/proof_sums.bend as ProofSums
Lines 56-61 of minebender-game@1.0.0.0/proof_sums.bend: https://jend.leeeet.dev/read.txt?path=minebender-game@1.0.0.0/proof_sums.bend&start_line=56&end_line=61

import Base

def rsum(~A: Data, ~f: A -> Nat, r: List<&2, A>) -> Nat:
  match r:
    case Nil{}:
      0n
    case a <> t:
      Nat.add(f(a), rsum(~A, ~f, t))

Uses (3):
  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=Nat.add