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regexp: fix compiling alternate patterns of different fold case literals

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Fixing Equal method in regexp/syntax package fixes compilation of
some alternate patterns like "0A|0[aA]".

Fixes #59007
This commit is contained in:
itchyny 2024-03-07 20:22:04 +09:00
parent 6dc99aa7eb
commit 83e6d1d06c
2 changed files with 3 additions and 1 deletions
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2
src/regexp/find_test.go
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@ -98,6 +98,8 @@ var findTests = []FindTest{
{`\B`, "x y", nil},
{`\B`, "xx yy", build(2, 1, 1, 4, 4)},
{`(|a)*`, "aa", build(3, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2)},
{`0A|0[aA]`, "0a", build(1, 0, 2)},
{`0[aA]|0A`, "0a", build(1, 0, 2)},
// RE2 tests
{`[^\S\s]`, "abcd", nil},

2
src/regexp/syntax/regexp.go
View File

@ -76,7 +76,7 @@ func (x *Regexp) Equal(y *Regexp) bool {
}
case OpLiteral, OpCharClass:
return slices.Equal(x.Rune, y.Rune)
return x.Flags&FoldCase == y.Flags&FoldCase && slices.Equal(x.Rune, y.Rune)
case OpAlternate, OpConcat:
return slices.EqualFunc(x.Sub, y.Sub, (*Regexp).Equal)