Fields.num: def of lawful-fields@0.1.1.0
Import: import lawful-fields@0.1.1.0/fields.bend as Fields
Lines 66-68 of lawful-fields@0.1.1.0/fields.bend: https://jend.leeeet.dev/read.txt?path=lawful-fields@0.1.1.0/fields.bend&start_line=66&end_line=68

import Base
import lawful-bytes@0.1.1.0/defs.bend as D
import lawful-bytes@0.1.1.0/bytes.bend as B

# The decimal number in bytes from .. to-1, if it is one and below 2^32.
def num(b: D.Bytes, +from: U32, +to: U32) -> D.Bytes & Maybe<&2, U32>:
  num.go(Nat.sub(U32.to_nat(to), U32.to_nat(from)), B.at(b, from), from, 0, U32.is_lt(from, to))

Uses (9):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat.sub
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Pair
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_lt
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.to_nat
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/bytes.bend&name=at
  https://jend.leeeet.dev/definition.txt?path=lawful-bytes@0.1.1.0/defs.bend&name=Bytes
  https://jend.leeeet.dev/definition.txt?path=lawful-fields@0.1.1.0/fields.bend&name=num.go