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// 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'
}
func ExampleIsDigit() {
fmt.Printf("%t\n", unicode.IsDigit('৩'))
fmt.Printf("%t\n", unicode.IsDigit('A'))
// Output:
// true
// false
}
func ExampleIsNumber() {
fmt.Printf("%t\n", unicode.IsNumber('Ⅷ'))
fmt.Printf("%t\n", unicode.IsNumber('A'))
// Output:
// true
// false
}
func ExampleIsLetter() {
fmt.Printf("%t\n", unicode.IsLetter('A'))
fmt.Printf("%t\n", unicode.IsLetter('7'))
// Output:
// true
// false
}
func ExampleIsLower() {
fmt.Printf("%t\n", unicode.IsLower('a'))
fmt.Printf("%t\n", unicode.IsLower('A'))
// Output:
// true
// false
}
func ExampleIsUpper() {
fmt.Printf("%t\n", unicode.IsUpper('A'))
fmt.Printf("%t\n", unicode.IsUpper('a'))
// Output:
// true
// false
}
func ExampleIsTitle() {
fmt.Printf("%t\n", unicode.IsTitle('Dž'))
fmt.Printf("%t\n", unicode.IsTitle('a'))
// Output:
// true
// false
}
func ExampleIsSpace() {
fmt.Printf("%t\n", unicode.IsSpace(' '))
fmt.Printf("%t\n", unicode.IsSpace('\n'))
fmt.Printf("%t\n", unicode.IsSpace('\t'))
fmt.Printf("%t\n", unicode.IsSpace('a'))
// Output:
// true
// true
// true
// false
}