Json.hex4.go: def of bend-net-json@0.3.0.0
Import: import bend-net-json@0.3.0.0/json.bend as Json
Lines 139-153 of bend-net-json@0.3.0.0/json.bend: https://jend.leeeet.dev/read.txt?path=bend-net-json@0.3.0.0/json.bend&start_line=139&end_line=153

import Base

def hex4.go(s: String, +acc: U32, n: Nat) -> Maybe<&2, Esc>:
  match s:
    case SNil{}:
      match n:
        case 0n:
          Some{Esc{acc, SNil{}}}
        case 1n+k:
          None{}
    case SCon{Chr{+c}, t}:
      match n:
        case 0n:
          Some{Esc{acc, SCon{Chr{c}, t}}}
        case 1n+k:
          +h = hexd(c)
          Bool.pick(Maybe<&2, Esc>, U32.is_eq(h, 99), None{}, hex4.go(t, (acc * 16 + h : U32), k))

Uses (11):
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Bool.pick
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Char
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Maybe
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=Nat
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=String
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.add
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.is_eq
  https://jend.leeeet.dev/definition.txt?path=Base/base.bend&name=U32.mul
  https://jend.leeeet.dev/definition.txt?path=bend-net-json@0.3.0.0/json.bend&name=Esc
  https://jend.leeeet.dev/definition.txt?path=bend-net-json@0.3.0.0/json.bend&name=hexd