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| author | Russ Cox <rsc@golang.org> | 2010-04-26 10:00:18 -0700 |
|---|---|---|
| committer | Russ Cox <rsc@golang.org> | 2010-04-26 10:00:18 -0700 |
| commit | 6f33f34bbcdfd400a46ebcc97ed6820ccc9a2459 (patch) | |
| tree | 50a9b9e676b6a87628fb134173593a82a3dcf515 | |
| parent | 43409ed2c66cdf739334e68472db57885d5ca0c1 (diff) | |
| download | go-6f33f34bbcdfd400a46ebcc97ed6820ccc9a2459.tar.gz go-6f33f34bbcdfd400a46ebcc97ed6820ccc9a2459.zip | |
regexp: allow escaping of any punctuation
More in line with other regexp packages
and egrep; accommodates overzealous escapers.
R=r
CC=golang-dev
https://golang.org/cl/1008041
| -rw-r--r-- | src/pkg/regexp/all_test.go | 9 | ||||
| -rw-r--r-- | src/pkg/regexp/regexp.go | 8 |
2 files changed, 13 insertions, 4 deletions
diff --git a/src/pkg/regexp/all_test.go b/src/pkg/regexp/all_test.go index c1f6795e72..62dad3aa01 100644 --- a/src/pkg/regexp/all_test.go +++ b/src/pkg/regexp/all_test.go @@ -28,6 +28,7 @@ var good_re = []string{ `[abc]`, `[^1234]`, `[^\n]`, + `\!\\`, } type stringError struct { @@ -100,6 +101,14 @@ var matches = []tester{ // fixed bugs tester{`ab$`, "cab", vec{1, 3}}, tester{`axxb$`, "axxcb", vec{}}, + + // can backslash-escape any punctuation + tester{`\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\]\^\_\{\|\}\~`, + `!"#$%&'()*+,-./:;<=>?@[\]^_{|}~`, vec{0, 31}}, + tester{`[\!\"\#\$\%\&\'\(\)\*\+\,\-\.\/\:\;\<\=\>\?\@\[\\\]\^\_\{\|\}\~]+`, + `!"#$%&'()*+,-./:;<=>?@[\]^_{|}~`, vec{0, 31}}, + tester{"\\`", "`", vec{0, 1}}, + tester{"[\\`]+", "`", vec{0, 1}}, } func compileTest(t *testing.T, expr string, error os.Error) *Regexp { diff --git a/src/pkg/regexp/regexp.go b/src/pkg/regexp/regexp.go index f8d03d743f..cdd5cacdda 100644 --- a/src/pkg/regexp/regexp.go +++ b/src/pkg/regexp/regexp.go @@ -298,8 +298,8 @@ func special(c int) bool { return false } -func specialcclass(c int) bool { - for _, r := range `\-[]` { +func ispunct(c int) bool { + for _, r := range "!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~" { if c == r { return true } @@ -344,7 +344,7 @@ func (p *parser) charClass() instr { p.error(ErrExtraneousBackslash) case c == 'n': c = '\n' - case specialcclass(c): + case ispunct(c): // c is as delivered default: p.error(ErrBadBackslash) @@ -439,7 +439,7 @@ func (p *parser) term() (start, end instr) { p.error(ErrExtraneousBackslash) case c == 'n': c = '\n' - case special(c): + case ispunct(c): // c is as delivered default: p.error(ErrBadBackslash) |