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Regex: Introduce backward_regex_search helper function

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This commit is contained in:
Maxime Coste 2017-12-03 17:04:37 +08:00
parent b34bb6b794
commit 9a4b5de772
2 changed files with 15 additions and 8 deletions
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11
src/regex.hh
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@ -136,6 +136,13 @@ bool regex_search(It begin, It end, MatchResults<It>& res, const Regex& re,
return regex_search<It, direction>(begin, end, res.values(), *re.impl(), flags); return regex_search<It, direction>(begin, end, res.values(), *re.impl(), flags);
} }
template<typename It>
bool backward_regex_search(It begin, It end, MatchResults<It>& res, const Regex& re,
RegexExecFlags flags = RegexExecFlags::None)
{
return regex_search<It, MatchDirection::Backward>(std::move(begin), std::move(end), res, re, flags);
}
String option_to_string(const Regex& re); String option_to_string(const Regex& re);
void option_from_string(StringView str, Regex& re); void option_from_string(StringView str, Regex& re);
@ -204,8 +211,8 @@ private:
} }
else else
{ {
if (not regex_search<Iterator, MatchDirection::Backward>(m_begin, m_next_pos, m_results, *m_regex, if (not backward_regex_search(m_begin, m_next_pos, m_results, *m_regex,
m_flags | additional_flags)) m_flags | additional_flags))
m_regex = nullptr; m_regex = nullptr;
else else
m_next_pos = m_results[0].first; m_next_pos = m_results[0].first;

12
src/selectors.cc
View File

@ -862,14 +862,14 @@ static bool find_prev(const Buffer& buffer, const BufferIterator& pos,
const Regex& ex, bool& wrapped) const Regex& ex, bool& wrapped)
{ {
if (pos != buffer.begin() and if (pos != buffer.begin() and
regex_search<BufferIterator, MatchDirection::Backward>( backward_regex_search(buffer.begin(), pos, matches, ex,
buffer.begin(), pos, matches, ex, match_flags(buffer, buffer.begin(), pos) |
match_flags(buffer, buffer.begin(), pos) | RegexExecFlags::NotInitialNull)) RegexExecFlags::NotInitialNull))
return true; return true;
wrapped = true; wrapped = true;
return regex_search<BufferIterator, MatchDirection::Backward>( return backward_regex_search(buffer.begin(), buffer.end(), matches, ex,
buffer.begin(), buffer.end(), matches, ex, match_flags(buffer, buffer.begin(), buffer.end()) |
match_flags(buffer, buffer.begin(), buffer.end()) | RegexExecFlags::NotInitialNull); RegexExecFlags::NotInitialNull);
} }
template<MatchDirection direction> template<MatchDirection direction>