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Regex: Fix handling of control escapes inside character classes

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This commit is contained in:
Maxime Coste 2017-10-07 21:24:05 +08:00
parent f3736a4b48
commit 578640c8a4
1 changed files with 23 additions and 8 deletions
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29
src/regex_impl.cc
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@ -278,9 +278,6 @@ private:
} }
// CharacterEscape // CharacterEscape
struct { Codepoint name; Codepoint value; } control_escapes[] = {
{ 'f', '\f' }, { 'n', '\n' }, { 'r', '\r' }, { 't', '\t' }, { 'v', '\v' }
};
for (auto& control : control_escapes) for (auto& control : control_escapes)
{ {
if (control.name == cp) if (control.name == cp)
@ -337,10 +334,15 @@ private:
} }
else // its just an escaped character else // its just an escaped character
{ {
cp = *m_pos++;
if (++m_pos == m_regex.end()) for (auto& control : control_escapes)
{
if (control.name == cp)
{
cp = control.value;
break; break;
cp = *m_pos; }
}
} }
} }
@ -487,8 +489,10 @@ private:
StringView additional_chars; StringView additional_chars;
bool neg; bool neg;
}; };
static const CharacterClassEscape character_class_escapes[8]; static const CharacterClassEscape character_class_escapes[8];
struct ControlEscape { Codepoint name; Codepoint value; };
static const ControlEscape control_escapes[5];
}; };
// For some reason Gcc fails to link if this is constexpr // For some reason Gcc fails to link if this is constexpr
@ -499,6 +503,11 @@ const RegexParser::CharacterClassEscape RegexParser::character_class_escapes[8]
{ 'h', nullptr, " \t", false }, { 'h', nullptr, " \t", false },
}; };
const RegexParser::ControlEscape RegexParser::control_escapes[5] = {
{ 'f', '\f' }, { 'n', '\n' }, { 'r', '\r' }, { 't', '\t' }, { 'v', '\v' }
};
struct RegexCompiler struct RegexCompiler
{ {
RegexCompiler(const ParsedRegex& parsed_regex, MatchDirection direction) RegexCompiler(const ParsedRegex& parsed_regex, MatchDirection direction)
@ -1062,6 +1071,12 @@ auto test_regex = UnitTest{[]{
kak_assert(vm.exec("abc")); kak_assert(vm.exec("abc"));
} }
{
TestVM<> vm{R"([^:\n]+)"};
kak_assert(not vm.exec("\nbc"));
kak_assert(vm.exec("abc"));
}
{ {
TestVM<> vm{R"((?:foo)+)"}; TestVM<> vm{R"((?:foo)+)"};
kak_assert(vm.exec("foofoofoo")); kak_assert(vm.exec("foofoofoo"));