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regexp/syntax: correctly print ^ BOL and $ EOL

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Fixes #12980.

Change-Id: I936db2f57f7c4dc80bb8ec32715c4c6b7bf0d708
Reviewed-on: https://go-review.googlesource.com/16112
Reviewed-by: Russ Cox <rsc@golang.org>
This commit is contained in:
Tamir Duberstein 2015-10-20 11:21:21 -04:00 committed by Russ Cox
parent 0b55be1ba2
commit 3aa755b8fb
2 changed files with 4 additions and 4 deletions
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4
src/regexp/syntax/regexp.go
View File

@ -166,9 +166,9 @@ func writeRegexp(b *bytes.Buffer, re *Regexp) {
case OpAnyChar:
b.WriteString(`(?s:.)`)
case OpBeginLine:
b.WriteRune('^')
b.WriteString(`(?m:^)`)
case OpEndLine:
b.WriteRune('$')
b.WriteString(`(?m:$)`)
case OpBeginText:
b.WriteString(`\A`)
case OpEndText:

4
src/regexp/syntax/simplify_test.go
View File

@ -19,8 +19,8 @@ var simplifyTests = []struct {
{`(ab)+`, `(ab)+`},
{`(ab)?`, `(ab)?`},
{`.`, `(?s:.)`},
{`^`, `^`},
{`$`, `$`},
{`^`, `(?m:^)`},
{`$`, `(?m:$)`},
{`[ac]`, `[ac]`},
{`[^ac]`, `[^ac]`},