def bit.at
import emerging-ezaudio@0.4.0.0/src/mp3.bend as Mp3import Base
181def bit.at(z: Bool, xs: List<&2, U32>, +buf: U32, +n: U32) -> Bit:
182 match z:
183 case True{}:
184 Bit{xs, buf, n, 0}
185 case False{}:
186 Bit{xs, buf, (n - 1 : U32), ((buf >> U32.to_nat((n - 1 : U32)) : U32) .&. 1 : U32)}