def AT

lawful-bytes@0.1.1.0 · proof_core.bend:30

import Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-bytes@0.1.1.0/bytes.bend as B
import lawful-arrays@0.1.0.0/proof_tree.bend as P

30# Byte i, as B.at reads it.
31def AT(+len: U32, +t: P.Tree<U32>, +i: U32) -> U32:
32  Pair.snd(D.Bytes, U32, B.at(BT(len, t), i))