// Copyright 2015 The Go Authors. All rights reserved.// Use of this source code is governed by a BSD-style// license that can be found in the LICENSE file. package unicode_test import (	"fmt"	"unicode") // Functions starting with "Is" can be used to inspect which table of range a// rune belongs to. Note that runes may fit into more than one range.func Example_is() { 	// constant with mixed type runes	const mixed = "\b5Ὂg̀9! ℃ᾭG"	for _, c := range mixed {		fmt.Printf("For %q:\n", c)		if unicode.IsControl(c) {			fmt.Println("\tis control rune")		}		if unicode.IsDigit(c) {			fmt.Println("\tis digit rune")		}		if unicode.IsGraphic(c) {			fmt.Println("\tis graphic rune")		}		if unicode.IsLetter(c) {			fmt.Println("\tis letter rune")		}		if unicode.IsLower(c) {			fmt.Println("\tis lower case rune")		}		if unicode.IsMark(c) {			fmt.Println("\tis mark rune")		}		if unicode.IsNumber(c) {			fmt.Println("\tis number rune")		}		if unicode.IsPrint(c) {			fmt.Println("\tis printable rune")		}		if !unicode.IsPrint(c) {			fmt.Println("\tis not printable rune")		}		if unicode.IsPunct(c) {			fmt.Println("\tis punct rune")		}		if unicode.IsSpace(c) {			fmt.Println("\tis space rune")		}		if unicode.IsSymbol(c) {			fmt.Println("\tis symbol rune")		}		if unicode.IsTitle(c) {			fmt.Println("\tis title case rune")		}		if unicode.IsUpper(c) {			fmt.Println("\tis upper case rune")		}	} 	// Output:	// For '\b':	// 	is control rune	// 	is not printable rune	// For '5':	// 	is digit rune	// 	is graphic rune	// 	is number rune	// 	is printable rune	// For 'Ὂ':	// 	is graphic rune	// 	is letter rune	// 	is printable rune	// 	is upper case rune	// For 'g':	// 	is graphic rune	// 	is letter rune	// 	is lower case rune	// 	is printable rune	// For '̀':	// 	is graphic rune	// 	is mark rune	// 	is printable rune	// For '9':	// 	is digit rune	// 	is graphic rune	// 	is number rune	// 	is printable rune	// For '!':	// 	is graphic rune	// 	is printable rune	// 	is punct rune	// For ' ':	// 	is graphic rune	// 	is printable rune	// 	is space rune	// For '℃':	// 	is graphic rune	// 	is printable rune	// 	is symbol rune	// For 'ᾭ':	// 	is graphic rune	// 	is letter rune	// 	is printable rune	// 	is title case rune	// For 'G':	// 	is graphic rune	// 	is letter rune	// 	is printable rune	// 	is upper case rune} func ExampleSimpleFold() {	fmt.Printf("%#U\n", unicode.SimpleFold('A'))      // 'a'	fmt.Printf("%#U\n", unicode.SimpleFold('a'))      // 'A'	fmt.Printf("%#U\n", unicode.SimpleFold('K'))      // 'k'	fmt.Printf("%#U\n", unicode.SimpleFold('k'))      // '\u212A' (Kelvin symbol, K)	fmt.Printf("%#U\n", unicode.SimpleFold('\u212A')) // 'K'	fmt.Printf("%#U\n", unicode.SimpleFold('1'))      // '1' 	// Output:	// U+0061 'a'	// U+0041 'A'	// U+006B 'k'	// U+212A 'K'	// U+004B 'K'	// U+0031 '1'} func ExampleTo() {	const lcG = 'g'	fmt.Printf("%#U\n", unicode.To(unicode.UpperCase, lcG))	fmt.Printf("%#U\n", unicode.To(unicode.LowerCase, lcG))	fmt.Printf("%#U\n", unicode.To(unicode.TitleCase, lcG)) 	const ucG = 'G'	fmt.Printf("%#U\n", unicode.To(unicode.UpperCase, ucG))	fmt.Printf("%#U\n", unicode.To(unicode.LowerCase, ucG))	fmt.Printf("%#U\n", unicode.To(unicode.TitleCase, ucG)) 	// Output:	// U+0047 'G'	// U+0067 'g'	// U+0047 'G'	// U+0047 'G'	// U+0067 'g'	// U+0047 'G'} func ExampleToLower() {	const ucG = 'G'	fmt.Printf("%#U\n", unicode.ToLower(ucG)) 	// Output:	// U+0067 'g'}func ExampleToTitle() {	const ucG = 'g'	fmt.Printf("%#U\n", unicode.ToTitle(ucG)) 	// Output:	// U+0047 'G'} func ExampleToUpper() {	const ucG = 'g'	fmt.Printf("%#U\n", unicode.ToUpper(ucG)) 	// Output:	// U+0047 'G'} func ExampleSpecialCase() {	t := unicode.TurkishCase 	const lci = 'i'	fmt.Printf("%#U\n", t.ToLower(lci))	fmt.Printf("%#U\n", t.ToTitle(lci))	fmt.Printf("%#U\n", t.ToUpper(lci)) 	const uci = 'İ'	fmt.Printf("%#U\n", t.ToLower(uci))	fmt.Printf("%#U\n", t.ToTitle(uci))	fmt.Printf("%#U\n", t.ToUpper(uci)) 	// Output:	// U+0069 'i'	// U+0130 'İ'	// U+0130 'İ'	// U+0069 'i'	// U+0130 'İ'	// U+0130 'İ'}