Lift core::detail::demange to core, move demangled_name to typeinfo.hpp.

test/demangle_test.cpp

@@ -0,0 +1,23 @@
+//
+// Trivial test for core::demangle
+//
+// 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/demangle.hpp>
+#include <iostream>
+
+template<class T1, class T2> struct Y1
+{
+};
+
+int main()
+{
+    typedef Y1<int, long> T;
+    std::cout << boost::core::demangle( typeid( T ).name() );
+    return 0;
+}