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regexp: add (*Regexp).Longest

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Fixes #3696.

R=rsc
CC=golang-dev
https://golang.org/cl/7133051
This commit is contained in:
Andrew Gerrand 2013-02-04 15:28:55 +11:00
parent 1d9f67daf0
commit f41ffc2bf4
2 changed files with 22 additions and 0 deletions
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14
src/pkg/regexp/exec_test.go
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@ -706,3 +706,17 @@ func BenchmarkMatchHard_1K(b *testing.B) { benchmark(b, hard, 1<<10) }
func BenchmarkMatchHard_32K(b *testing.B) { benchmark(b, hard, 32<<10) }
func BenchmarkMatchHard_1M(b *testing.B) { benchmark(b, hard, 1<<20) }
func BenchmarkMatchHard_32M(b *testing.B) { benchmark(b, hard, 32<<20) }
func TestLongest(t *testing.T) {
re, err := Compile(`a(|b)`)
if err != nil {
t.Fatal(err)
}
if g, w := re.FindString("ab"), "a"; g != w {
t.Errorf("first match was %q, want %q", g, w)
}
re.Longest()
if g, w := re.FindString("ab"), "ab"; g != w {
t.Errorf("longest match was %q, want %q", g, w)
}
}