regex_compiler.h: Add todo comment.

2013-12-03  Tim Shen  <timshen91@gmail.com>

	* regex_compiler.h: Add todo comment.
	* regex_executor.tcc: Likewise.

From-SVN: r205624

libstdc++-v3/ChangeLog

+2013-12-03  Tim Shen  <timshen91@gmail.com>
+
+	* regex_compiler.h: Add todo comment.
+	* regex_executor.tcc: Likewise.
+
 2013-11-29  Matthias Klose  <doko@ubuntu.com>
 
 	* testsuite/experimental/string_view/requirements/exception,

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

@@ -237,6 +237,10 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
     };
 
   /// Matches a character range (bracket expression)
+  // TODO: Convert used _M_flags fields to template parameters, including
+  // collate and icase. Avoid using std::set, could use flat_set
+  // (sorted vector and binary search) instead; use an fixed sized (256)
+  // vector<bool> for char specialization if necessary.
   template<typename _TraitsT>
     struct _BracketMatcher
     {

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

@@ -162,6 +162,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
       return false;
     }
 
+  // TODO: Use a function vector to dispatch, instead of using switch-case.
   template<typename _BiIter, typename _Alloc, typename _TraitsT,
     bool __dfs_mode>
   template<bool __match_mode>