def u64_pow2
import bend-collections-laws-crypto@1.0.0.0/src/math/instances.bend as Instancesimport Base
import bend-collections-laws-crypto@1.0.0.0/src/math/u64.bend as W
import bend-collections-laws-crypto@1.0.0.0/src/math/w64.bend as X
88# 2^k for k < 64
89def u64_pow2(+k: Nat) -> W.U64:
90 X.w_pow2(k, Nat.is_lt(k, 32n))