def int64
import bend-collections-laws-math@1.0.0.0/src/math/random/rand.bend as Randimport Base
import bend-collections-laws-math@1.0.0.0/src/math/u64.bend as W
80def int64(~S: Data, ~next: S -> W.U64 & S, s: S) -> W.U64 & S:
81 low63(S, next(s))