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libgo: Update to October 24 version of master library.

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From-SVN: r204466
This commit is contained in:
Ian Lance Taylor 2013-11-06 19:49:01 +00:00
parent f20f261304
commit f038dae646
596 changed files with 32029 additions and 7466 deletions
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29
libgo/go/regexp/syntax/prog.go
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@ -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 {
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 r1 == '\n' {
op |= EmptyBeginLine
}
if r2 < 0 {
switch {
case IsWordChar(r2):
boundary ^= 1
case r2 == '\n':
op |= EmptyEndLine
case r2 < 0:
op |= EmptyEndText | EmptyEndLine
}
if r2 == '\n' {
op |= EmptyEndLine
}
if IsWordChar(r1) != IsWordChar(r2) {
op |= EmptyWordBoundary
} else {
op |= EmptyNoWordBoundary
if boundary != 0 { // IsWordChar(r1) != IsWordChar(r2)
op ^= (EmptyWordBoundary | EmptyNoWordBoundary)
}
return op
}