kurz/text/main.go

package main

import (
	"errors"
	"fmt"
	"golang.org/x/text/message"

	"golang.org/x/text/language"
	_ "golang.org/x/text/message"
)

//go:generate gotext -srclang=en update -out=catalog.go -lang=fr,en

type ErrorKind int

const (
	NoError ErrorKind = iota
	Unimplemented
)

var Errors = map[ErrorKind]string{
	NoError:       "No error",
	Unimplemented: "Not yet implemented",
}

type Error struct {
	error
	Kind ErrorKind
}

func MakeError(kind ErrorKind, detail string) Error {
	var message string
	if len(detail) == 0 {
		message = Errors[kind]
	} else {
		message = fmt.Sprintf("%s: %s", Errors[kind], detail)
	}

	return Error{
		Kind:  kind,
		error: errors.New(message),
	}
}

func main() {
	p := message.NewPrinter(language.French)
	err := MakeError(NoError, "all is well")
	p.Printf(err)
}