Add core::demangled_name.

test/Jamfile.v2

@@ -68,3 +68,5 @@ run typeinfo_test.cpp : : : <rtti>off : typeinfo_test_no_rtti ;
 
 run iterator_test.cpp ;
 run detail_iterator_test.cpp ;
+
+run demangled_name_test.cpp  : : : <test-info>always_show_run_output ;

test/demangled_name_test.cpp

@@ -0,0 +1,24 @@
+//
+// Trivial test for core::demangled_name
+//
+// Copyright (c) 2014 Peter Dimov
+//
+// Distributed under 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/core/demangled_name.hpp>
+#include <boost/core/typeinfo.hpp>
+#include <iostream>
+
+template<class T1, class T2> struct Y1
+{
+};
+
+int main()
+{
+	typedef Y1<int, long> T;
+    std::cout << boost::core::demangled_name( BOOST_CORE_TYPEID( T ) );
+    return 0;
+}