Bits.read.if: def of bend-kit-bits@0.1.0.1
Import: import bend-kit-bits@0.1.0.1/bits.bend as Bits
Lines 63-68 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=63&end_line=68

import Base

def read.if(ok: Bool, +msb: Bool, +len: U32, buf: Array<U32>, +pos: U32, +n: U32) -> Reader & Maybe<&2, U32>:
  match ok:
    case True{}:
      read.got(msb, len, pos, n, win(msb, buf, pos))
    case False{}:
      (Reader{len, buf, pos}, None{})

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Array
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Sigma
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bits@0.1.0.1/bits.bend&name=Reader
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bits@0.1.0.1/bits.bend&name=read.got
  https://jend.leeeet.dev/definition.txt?path=bend-kit-bits@0.1.0.1/bits.bend&name=win