Split _M_dfs() into smaller functions.

	* regex_executor.h(_M_handle_repeat, _M_handle_subexpr_begin)
	(_M_handle_subexpr_end, _M_handle_line_begin_assertion)
	(_M_handle_line_end_assertion, _M_handle_word_boundary)
	(_M_handle_subexpr_lookahead, _M_handle_match)
	(_M_handle_backref, _M_handle_accept, _M_handle_alternative):
	Add separate function declarations.
	* regex_executor.tcc: Split _M_dfs() into multiple handler functions.

From-SVN: r239673

libstdc++-v3/ChangeLog

+2016-08-22  Tim Shen  <timshen@google.com>
+
+	Split _M_dfs() into smaller functions.
+	* regex_executor.h(_M_handle_repeat, _M_handle_subexpr_begin)
+	(_M_handle_subexpr_end, _M_handle_line_begin_assertion)
+	(_M_handle_line_end_assertion, _M_handle_word_boundary)
+	(_M_handle_subexpr_lookahead, _M_handle_match)
+	(_M_handle_backref, _M_handle_accept, _M_handle_alternative):
+	Add separate function declarations.
+	* regex_executor.tcc: Split _M_dfs() into multiple handler functions.
+
 2016-08-22  Gleb Natapov  <gleb@scylladb.com>
 
 	PR libstdc++/68297

libstdc++-v3/include/bits/regex_executor.h

@@ -109,6 +109,39 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       _M_rep_once_more(_Match_mode __match_mode, _StateIdT);
 
       void
+      _M_handle_repeat(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_subexpr_begin(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_subexpr_end(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_line_begin_assertion(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_line_end_assertion(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_word_boundary(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_subexpr_lookahead(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_match(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_backref(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_accept(_Match_mode, _StateIdT);
+
+      void
+      _M_handle_alternative(_Match_mode, _StateIdT);
+
+      void
       _M_dfs(_Match_mode __match_mode, _StateIdT __start);
 
       bool