Go 비트플래그 warnings 예시

개요

Go 이진수 warnings 예시

package main

import (
	"errors"
	"fmt"
)

const (
	Warning1 = 1 << iota
	Warning2
	Warning3
)

var warningNames = map[int]string{
	Warning1: "Warning 1",
	Warning2: "Warning 2",
	Warning3: "Warning 3",
}

func main() {
	result, warnings, err := process()

	fmt.Println("Result:", result)

	if warnings != 0 {
		fmt.Println("Warnings occurred:")
		for w, name := range warningNames {
			if warnings&w != 0 {
				fmt.Println("-", name)
			}
		}
	}

	if err != nil {
		fmt.Println("Error:", err)
	}
}

func process() (int, int, error) {
	result := 42
	warnings := Warning1 | Warning3
	var err error

	return result, warnings, err
}