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regexp: add example for NumSubexp

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Updates #21450

Change-Id: Idf276e97f816933cc0f752cdcd5e713b5c975833
GitHub-Last-Rev: 198e585f92
GitHub-Pull-Request: golang/go#33490
Reviewed-on: https://go-review.googlesource.com/c/go/+/189138
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Pantelis Sampaziotis 2019-09-10 19:00:16 +00:00 committed by Ian Lance Taylor
parent cb30430af8
commit 68a6536848
1 changed files with 7 additions and 0 deletions
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7
src/regexp/example_test.go
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@ -181,6 +181,13 @@ func ExampleRegexp_MatchString() {
// true
}
func ExampleRegexp_NumSubexp() {
re := regexp.MustCompile(`(.*)((a)b)(.*)a`)
fmt.Println(re.NumSubexp())
// Output:
// 4
}
func ExampleRegexp_ReplaceAll() {
re := regexp.MustCompile(`a(x*)b`)
fmt.Printf("%s\n", re.ReplaceAll([]byte("-ab-axxb-"), []byte("T")))