aoc/2020/helper.go

package helper

import (
	"flag"
)

type Metal int

const (
	SILVER Metal = iota
	GOLD
)

type Args struct {
	file   string
	target Metal
}

func ParseArgs() Args {
	var target int
	var file string
	flag.IntVar(&target, "target", int(SILVER), "use -t 0 for silver and -t 1 for gold")
	flag.IntVar(&target, "t", int(SILVER), "use -t 0 for silver and -t 1 for gold")
	flag.StringVar(&file, "file", "", "which file to use")
	flag.Parse()
	return Args{file: file, target: Metal(target)}
}