def assign_if

bend-collections@1.0.0.0 · src/containers/bitlist.bend:95

import Base
import bend-collections@1.0.0.0/src/containers/bitset.bend as B
import bend-collections@1.0.0.0/src/containers/dynamic_array.bend as D
import bend-collections@1.0.0.0/src/containers/types/bitlist.bend as E

95def assign_if(ok: Bool, +lim: Maybe<&2, Nat>, +n: Nat, w: D.DynArray<&2, U32>, +i: Nat, +v: Bool) -> Bitlist & Result<&2, &2, E.Error, Unit>:
96  match ok:
97    case True{}:
98      assign_word(i, v, lim, n, D.get(U32, w, B.wordix(i)))
99    case False{}:
100      (BL{lim, n, w}, Fail{E.IndexOutOfRange{}})