Lane.rol15: def of bend-collections@1.0.0.0
Import: import bend-collections@1.0.0.0/src/crypto/keccak/lane.bend as Lane
Lines 70-73 of bend-collections@1.0.0.0/src/crypto/keccak/lane.bend: https://jend.leeeet.dev/read.txt?path=bend-collections@1.0.0.0/src/crypto/keccak/lane.bend&start_line=70&end_line=73

import Base
import bend-collections@1.0.0.0/src/crypto/keccak/types.bend as T

def rol15(a: T.Lane) -> T.Lane:
  match a:
    case T.W{+lo,+hi}:
      T.W{U32.or(U32.shln(lo,15n),U32.shrn(hi,17n)),U32.or(U32.shln(hi,15n),U32.shrn(lo,17n))}

Uses (4):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.or
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.shln
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.shrn
  https://jend.leeeet.dev/definition.txt?path=bend-collections@1.0.0.0/src/crypto/keccak/types.bend&name=Lane