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| author | Ian Lance Taylor <ian@gcc.gnu.org> | 2013-11-06 19:49:01 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@gcc.gnu.org> | 2013-11-06 19:49:01 +0000 |
| commit | f038dae646bac2b31be98ab592c0e5206d2d96f5 (patch) | |
| tree | 39530b071991b2326f881b2a30a2d82d6c133fd6 /libgo/go/regexp/syntax/prog.go | |
| parent | f20f261304993444741e0f0a14d3147e591bc660 (diff) | |
| download | gcc-f038dae646bac2b31be98ab592c0e5206d2d96f5.zip gcc-f038dae646bac2b31be98ab592c0e5206d2d96f5.tar.gz gcc-f038dae646bac2b31be98ab592c0e5206d2d96f5.tar.bz2 | |
libgo: Update to October 24 version of master library.
From-SVN: r204466
Diffstat (limited to 'libgo/go/regexp/syntax/prog.go')
| -rw-r--r-- | libgo/go/regexp/syntax/prog.go | 29 |
1 files changed, 16 insertions, 13 deletions
diff --git a/libgo/go/regexp/syntax/prog.go b/libgo/go/regexp/syntax/prog.go index 902d3b3..a482a82 100644 --- a/libgo/go/regexp/syntax/prog.go +++ b/libgo/go/regexp/syntax/prog.go @@ -56,23 +56,26 @@ const ( // Passing r2 == -1 indicates that the position is // at the end of the text. func EmptyOpContext(r1, r2 rune) EmptyOp { - var op EmptyOp - if r1 < 0 { - op |= EmptyBeginText | EmptyBeginLine - } - if r1 == '\n' { + var op EmptyOp = EmptyNoWordBoundary + var boundary byte + switch { + case IsWordChar(r1): + boundary = 1 + case r1 == '\n': op |= EmptyBeginLine + case r1 < 0: + op |= EmptyBeginText | EmptyBeginLine } - if r2 < 0 { - op |= EmptyEndText | EmptyEndLine - } - if r2 == '\n' { + switch { + case IsWordChar(r2): + boundary ^= 1 + case r2 == '\n': op |= EmptyEndLine + case r2 < 0: + op |= EmptyEndText | EmptyEndLine } - if IsWordChar(r1) != IsWordChar(r2) { - op |= EmptyWordBoundary - } else { - op |= EmptyNoWordBoundary + if boundary != 0 { // IsWordChar(r1) != IsWordChar(r2) + op ^= (EmptyWordBoundary | EmptyNoWordBoundary) } return op } |