Bits.field: def of bend-kit-bits@0.1.0.1
Import: import bend-kit-bits@0.1.0.1/bits.bend as Bits
Lines 38-40 of bend-kit-bits@0.1.0.1/bits.bend: https://jend.leeeet.dev/read.txt?path=bend-kit-bits@0.1.0.1/bits.bend&start_line=38&end_line=40

import Base

# The first n (at most 32) bits of a window as a number, first stream bit most significant MSB-first.
def field(+msb: Bool, +n: U32, +w: U32) -> U32:
  Bool.pick(U32, msb, U32.shrn(w, U32.to_nat((32 - n : U32))), (w .&. mask(n) : U32))

Uses (8):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.and
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.shrn
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bits@0.1.0.1/bits.bend&name=mask