Make sub_match a valid range as per https://svn.boost.org/trac/boost/ticket/11036

include/boost/regex/v4/sub_match.hpp

@@ -162,6 +162,11 @@ public:
 #endif
       return *this;
    }
+   //
+   // Make this type a range, for both Boost.Range, and C++11:
+   //
+   BidiIterator begin()const;
+   BidiIterator end()const;
 
 
 #ifdef BOOST_OLD_REGEX_H

test/Jamfile.v2

@@ -149,10 +149,9 @@ test-suite regex
       : : : <test-info>always_show_run_output : test_collate_info ]
 
 
-      [ compile concepts/concept_check.cpp ../build//boost_regex
-      ]
-      [ compile concepts/icu_concept_check.cpp ../build//boost_regex
-      ]
+      [ compile concepts/concept_check.cpp ]
+      [ compile concepts/icu_concept_check.cpp ]
+      [ compile concepts/range_concept_check.cpp ]
       
      [ run
     # sources

test/concepts/range_concept_check.cpp

@@ -0,0 +1,41 @@
+/*
+*
+* Copyright (c) 2015
+* John Maddock
+*
+* Use, modification and distribution are subject to the
+* Boost Software License, Version 1.0. (See accompanying file
+* LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+*
+*/
+
+#include <boost/regex.hpp>
+#include <boost/range/concepts.hpp>
+
+template <class T>
+void use_val(const T&){}
+
+template <class T>
+void check()
+{
+   BOOST_CONCEPT_ASSERT((boost::ForwardRangeConcept<T>));
+   BOOST_CONCEPT_ASSERT((boost_concepts::ReadableIteratorConcept<typename boost::range_iterator<T>::type>));
+   BOOST_CONCEPT_ASSERT((boost_concepts::RandomAccessTraversalConcept<typename boost::range_iterator<T>::type>));
+
+#ifndef BOOST_NO_CXX11_RANGE_BASED_FOR
+   const T val;
+   for(auto item : val)
+   {
+      use_val(item);
+   }
+#endif
+}
+
+int main()
+{
+   check<boost::smatch>();
+   check<boost::cmatch>();
+
+   check <boost::sub_match<const char*> >();
+   return 0;
+}