go__i18n_demo/xtext/02plural/02plural.go

package main

import (
	"fmt"
	"log"

	"golang.org/x/text/feature/plural"
	"golang.org/x/text/language"
	"golang.org/x/text/message"
)

const (
	Problem = "You have %d problem.\n"
)

func init() {
	message.Set(language.French, Problem,
		plural.Selectf(1, "%d",
			"=0", "Vous n'avez aucun problème\n",
			plural.One, "Vous avez un problème\n",
			"other", "Vous avez %d problèmes\n",
		),
	)
	message.Set(language.AmericanEnglish, Problem,
		plural.Selectf(1, "%d",
			"=0", "You do not have a problem\n",
			plural.One, "You have a problem\n",
			"=2", "You have a couple of problems\n",
			plural.Other, "You have %d problems\n",
		),
	)
}

func main() {
	french, err := language.Parse("fr_FR")
	if err != nil {
		log.Fatalf("parsing fr_FR= %v", err)
	}
	for _, lang := range []language.Tag{french, language.AmericanEnglish} {
		fmt.Printf("Language: %v\n", lang)
		p := message.NewPrinter(lang)
		for i := 0; i < 4; i++ {
			fmt.Print("\t")
			p.Printf(Problem, i)
		}
	}
}