From bef193ae54796b7efd6ceed1b2b3e4b2906294f9 Mon Sep 17 00:00:00 2001
From: Maxime Coste <frrrwww@gmail.com>
Date: Wed, 16 Nov 2011 20:05:29 +0000
Subject: [PATCH] RegexSelector: support captures

---
 src/regex_selector.cc | 39 +++++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 8 deletions(-)

diff --git a/src/regex_selector.cc b/src/regex_selector.cc
index 821f79f3..0bfce956 100644
--- a/src/regex_selector.cc
+++ b/src/regex_selector.cc
@@ -9,28 +9,48 @@ RegexSelector::RegexSelector(const std::string& exp)
 
 Selection RegexSelector::operator()(const BufferIterator& cursor) const
 {
+    BufferIterator begin = cursor;
+    BufferIterator end = cursor;
+    Selection::CaptureList captures;
+
     try
     {
         boost::match_results<BufferIterator> matches;
 
-        if (boost::regex_search(cursor, cursor.buffer().end(), matches, m_regex, boost::match_nosubs))
-            return Selection(matches.begin()->first, matches.begin()->second-1);
-        else if (boost::regex_search(cursor.buffer().begin(), cursor, matches, m_regex, boost::match_nosubs))
-            return Selection(matches.begin()->first, matches.begin()->second-1);
+        if (boost::regex_search(cursor, cursor.buffer().end(), matches,
+                                m_regex))
+        {
+            begin = matches[0].first;
+            end   = matches[0].second;
+            std::copy(matches.begin(), matches.end(),
+                      std::back_inserter(captures));
+        }
+        else if (boost::regex_search(cursor.buffer().begin(), cursor, matches,
+                                     m_regex))
+        {
+            begin = matches[0].first;
+            end   = matches[0].second;
+            std::copy(matches.begin(), matches.end(),
+                      std::back_inserter(captures));
+        }
     }
     catch (boost::regex_error& err)
     {
         throw runtime_error("regex error");
     }
 
-    return Selection(cursor, cursor);
+
+    if (begin == end)
+        ++end;
+
+    return Selection(begin, end - 1, std::move(captures));
 }
 
 SelectionList RegexSelector::operator()(const Selection& selection) const
 {
     boost::regex_iterator<BufferIterator> re_it(selection.begin(),
                                                 selection.end(),
-                                                m_regex, boost::match_nosubs);
+                                                m_regex);
     boost::regex_iterator<BufferIterator> re_end;
 
     SelectionList result;
@@ -38,9 +58,12 @@ SelectionList RegexSelector::operator()(const Selection& selection) const
     {
         BufferIterator begin = (*re_it)[0].first;
         BufferIterator end   = (*re_it)[0].second;
-        assert(begin != end);
 
-        result.push_back(Selection(begin, end-1));
+        if (begin == end)
+           ++end;
+
+        Selection::CaptureList captures(re_it->begin(), re_it->end());
+        result.push_back(Selection(begin, end-1, std::move(captures)));
     }
     return result;
 }