Scan.number.stage: def of gralha-text-scan@0.1.0.1
Import: import gralha-text-scan@0.1.0.1/scan.bend as Scan
Lines 158-160 of gralha-text-scan@0.1.0.1/scan.bend: https://jend.leeeet.dev/read.txt?path=gralha-text-scan@0.1.0.1/scan.bend&start_line=158&end_line=160

import Base

def number.stage(+k: U32, +stage: U32) -> U32:
  choose(U32, U32.is_eq(k, 0), choose(U32, U32.is_eq(stage, 0), 1, choose(U32, U32.is_eq(stage, 3), 4, stage)),
    choose(U32, U32.is_eq(k, 1), 2, choose(U32, U32.is_eq(k, 2), 3, stage)))

Uses (3):
  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_eq
  https://jend.leeeet.dev/definition.txt?path=gralha-text-scan@0.1.0.1/scan.bend&name=choose