Get commit working in recursive mode.

include/boost/regex/v4/perl_matcher.hpp

@@ -446,7 +446,9 @@ private:
    bool match_fail();
    bool match_accept();
    bool match_commit();
+#ifdef BOOST_REGEX_NON_RECURSIVE
    bool skip_until_paren(int index, bool match = true);
+#endif
 
    // find procs stored in s_find_vtable:
    bool find_restart_any();
@@ -504,7 +506,10 @@ private:
    unsigned char match_any_mask;
    // recursion information:
    std::vector<recursion_info<results_type> > recursion_stack;
-
+#ifdef BOOST_REGEX_RECURSIVE
+   // Set to false by a (*COMMIT):
+   bool m_can_backtrack;
+#endif
 #ifdef BOOST_REGEX_NON_RECURSIVE
    //
    // additional members for non-recursive version:

include/boost/regex/v4/perl_matcher_common.hpp

@@ -80,6 +80,8 @@ void perl_matcher<BidiIterator, Allocator, traits>::construct_init(const basic_r
 #ifdef BOOST_REGEX_NON_RECURSIVE
    m_stack_base = 0;
    m_backup_state = 0;
+#elif defined(BOOST_REGEX_RECURSIVE)
+   m_can_backtrack = true;
 #endif
    // find the value to use for matching word boundaries:
    m_word_mask = re.get_data().m_word_mask; 
@@ -803,6 +805,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_fail()
    return false;
 }
 
+
 template <class BidiIterator, class Allocator, class traits>
 bool perl_matcher<BidiIterator, Allocator, traits>::find_restart_any()
 {

include/boost/regex/v4/perl_matcher_non_recursive.hpp

@@ -1073,39 +1073,6 @@ bool perl_matcher<BidiIterator, Allocator, traits>::skip_until_paren(int index,
 template <class BidiIterator, class Allocator, class traits>
 bool perl_matcher<BidiIterator, Allocator, traits>::match_accept()
 {
-#if 0
-   // Almost the same as match_match, but we need to close any half-open capturing groups:
-   for(unsigned i = 1; i < m_result.size(); ++i)
-   {
-      if((m_result[i].matched == false) && (m_result[i].first != last))
-      {
-         m_result.set_second(position, i);
-      }
-   }
-   if(!recursion_stack.empty())
-   {
-      // Skip forward to the end of this recursion:
-      while(pstate)
-      {
-         if(pstate->type == syntax_element_endmark)
-            if(static_cast<const re_brace*>(pstate)->index == recursion_stack.back().idx)
-               break;
-         pstate = pstate->next.p;
-      }
-      return true;
-      /*
-      int index = recursion_stack.back().idx;
-      pstate = recursion_stack.back().preturn_address;
-      *m_presult = recursion_stack.back().results;
-      push_recursion(index, recursion_stack.back().preturn_address, &recursion_stack.back().results);
-      recursion_stack.pop_back();
-      push_repeater_count(-(2 + index), &next_count);
-      return true;
-      */
-   }
-   else
-      return match_match();
-#endif
    if(!recursion_stack.empty())
    {
       skip_until_paren(recursion_stack.back().idx);

include/boost/regex/v4/perl_matcher_recursive.hpp

@@ -151,7 +151,9 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_startmark()
          m_independent = true;
          const re_syntax_base* next_pstate = static_cast<const re_jump*>(pstate->next.p)->alt.p->next.p;
          pstate = pstate->next.p->next.p;
+         bool can_backtrack = m_can_backtrack;
          r = match_all_states();
+         m_can_backtrack = can_backtrack;
          pstate = next_pstate;
          m_independent = old_independent;
 #ifdef BOOST_REGEX_MATCH_EXTRA
@@ -286,7 +288,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_alt()
             pstate = old_pstate;
             position = oldposition;
          }
-         return true;
+         return m_can_backtrack;
       }
       pstate = pstate->next.p;
       return true;
@@ -357,6 +359,8 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_rep()
          pstate = rep->next.p;
          if(match_all_states())
             return true;
+         if(!m_can_backtrack)
+            return false;
          // failed repeat, reset posistion and fall through for alternative:
          position = pos;
       }
@@ -377,6 +381,8 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_rep()
          pstate = rep->alt.p;
          if(match_all_states())
             return true;
+         if(!m_can_backtrack)
+            return false;
          // failed alternative, reset posistion and fall through for repeat:
          position = pos;
       }
@@ -441,7 +447,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_slow()
          ++state_count;
          if(match_all_states())
             return true;
-         if(count >= rep->max)
+         if((count >= rep->max) || !m_can_backtrack)
             return false;
          ++count;
          pstate = psingle;
@@ -506,7 +512,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_dot_repeat_fast()
       ++state_count;
       if(match_all_states())
          return true;
-      if(count >= rep->max)
+      if((count >= rep->max) || !m_can_backtrack)
          return false;
       if(save_pos == last)
          return false;
@@ -600,7 +606,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_char_repeat()
       ++state_count;
       if(match_all_states())
          return true;
-      if(count >= rep->max)
+      if((count >= rep->max) || !m_can_backtrack)
          return false;
       position = save_pos;
       if(position == last)
@@ -695,7 +701,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_set_repeat()
       ++state_count;
       if(match_all_states())
          return true;
-      if(count >= rep->max)
+      if((count >= rep->max) || !m_can_backtrack)
          return false;
       position = save_pos;
       if(position == last)
@@ -791,7 +797,7 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_long_set_repeat()
       ++state_count;
       if(match_all_states())
          return true;
-      if(count >= rep->max)
+      if((count >= rep->max) || !m_can_backtrack)
          return false;
       position = save_pos;
       if(position == last)
@@ -821,6 +827,8 @@ bool perl_matcher<BidiIterator, Allocator, traits>::backtrack_till_match(std::si
 #pragma warning(push)
 #pragma warning(disable:4127)
 #endif
+   if(!m_can_backtrack)
+      return false;
    if((m_match_flags & match_partial) && (position == last))
       m_has_partial_match = true;
 
@@ -886,7 +894,9 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_recursion()
    repeater_count<BidiIterator>* saved = next_count;
    repeater_count<BidiIterator> r(&next_count); // resets all repeat counts since we're recursing and starting fresh on those
    next_count = &r;
+   bool can_backtrack = m_can_backtrack;
    bool result = match_all_states();
+   m_can_backtrack = can_backtrack;
    next_count = saved;
 
    if(!result)
@@ -983,7 +993,20 @@ bool perl_matcher<BidiIterator, Allocator, traits>::match_match()
    return true;
 }
 
+template <class BidiIterator, class Allocator, class traits>
+bool perl_matcher<BidiIterator, Allocator, traits>::match_commit()
+{
+   m_can_backtrack = false;
+   restart = last;
+   pstate = pstate->next.p;
+   return true;
+}
 
+template <class BidiIterator, class Allocator, class traits>
+bool perl_matcher<BidiIterator, Allocator, traits>::match_accept()
+{
+   return true;
+}
 
 } // namespace BOOST_REGEX_DETAIL_NS
 } // namespace boost