Proof.res_val: def of bend-collections-laws-crypto@1.0.0.0
Import: import bend-collections-laws-crypto@1.0.0.0/proofs/math/natural/proof.bend as Proof
Lines 25-31 of bend-collections-laws-crypto@1.0.0.0/proofs/math/natural/proof.bend: https://jend.leeeet.dev/read.txt?path=bend-collections-laws-crypto@1.0.0.0/proofs/math/natural/proof.bend&start_line=25&end_line=31

import Base
import bend-collections-laws-crypto@1.0.0.0/src/math/natural.bend as M

# the value of a successful result, 0 on an error
def res_val(r: Result<&2, &2, M.MathError, Nat>) -> Nat:
  match r:
    case Done{x}:
      x
    case Fail{e}:
      0n

Uses (3):
  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=bend-collections-laws-crypto@1.0.0.0/src/math/natural.bend&name=MathError