1// Copyright 2015 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package width_test
6
7import (
8	"fmt"
9
10	"golang.org/x/text/width"
11)
12
13func ExampleTransformer_fold() {
14	s := "abｦ￦￮￥Ａ"
15	f := width.Fold.String(s)
16	fmt.Printf("%U: %s\n", []rune(s), s)
17	fmt.Printf("%U: %s\n", []rune(f), f)
18
19	// Output:
20	// [U+0061 U+0062 U+FF66 U+FFE6 U+FFEE U+FFE5 U+FF21]: abｦ￦￮￥Ａ
21	// [U+0061 U+0062 U+30F2 U+20A9 U+25CB U+00A5 U+0041]: abヲ₩○¥A
22}
23
24func ExampleTransformer_widen() {
25	s := "ab¥ｦ₩￮"
26	w := width.Widen.String(s)
27	fmt.Printf("%U: %s\n", []rune(s), s)
28	fmt.Printf("%U: %s\n", []rune(w), w)
29
30	// Output:
31	// [U+0061 U+0062 U+00A5 U+FF66 U+20A9 U+FFEE]: ab¥ｦ₩￮
32	// [U+FF41 U+FF42 U+FFE5 U+30F2 U+FFE6 U+25CB]: ａｂ￥ヲ￦○
33}
34
35func ExampleTransformer_narrow() {
36	s := "abヲ￦○￥Ａ"
37	n := width.Narrow.String(s)
38	fmt.Printf("%U: %s\n", []rune(s), s)
39	fmt.Printf("%U: %s\n", []rune(n), n)
40
41	// Ambiguous characters with a halfwidth equivalent get mapped as well.
42	s = "←"
43	n = width.Narrow.String(s)
44	fmt.Printf("%U: %s\n", []rune(s), s)
45	fmt.Printf("%U: %s\n", []rune(n), n)
46
47	// Output:
48	// [U+0061 U+0062 U+30F2 U+FFE6 U+25CB U+FFE5 U+FF21]: abヲ￦○￥Ａ
49	// [U+0061 U+0062 U+FF66 U+20A9 U+FFEE U+00A5 U+0041]: abｦ₩￮¥A
50	// [U+2190]: ←
51	// [U+FFE9]: ￩
52}
53