Added low level tools for demangling. Requested by Boost.TypeIndex author.

test/demangle_test.cpp

@@ -2,6 +2,7 @@
 // Trivial test for core::demangle
 //
 // Copyright (c) 2014 Peter Dimov
+// Copyright (c) 2014 Andrey Semashev
 //
 // Distributed under the Boost Software License, Version 1.0.
 // See accompanying file LICENSE_1_0.txt or copy at
@@ -15,9 +16,46 @@ template<class T1, class T2> struct Y1
 {
 };
 
-int main()
+void test_demangle()
 {
     typedef Y1<int, long> T;
-    std::cout << boost::core::demangle( typeid( T ).name() );
+    std::cout << boost::core::demangle( typeid( T ).name() ) << std::endl;
+}
+
+void test_demangle_alloc()
+{
+    typedef Y1<int, long> T;
+    const char* p = boost::core::demangle_alloc( typeid( T ).name() );
+    if (p)
+    {
+        std::cout << p << std::endl;
+        boost::core::demangle_free(p);
+    }
+    else
+    {
+        std::cout << "[demangling failed]" << std::endl;
+    }
+}
+
+void test_scoped_demangled_name()
+{
+    typedef Y1<int, long> T;
+    boost::core::scoped_demangled_name demangled_name( typeid( T ).name() );
+    const char* p = demangled_name.get();
+    if (p)
+    {
+        std::cout << p << std::endl;
+    }
+    else
+    {
+        std::cout << "[demangling failed]" << std::endl;
+    }
+}
+
+int main()
+{
+    test_demangle();
+    test_demangle_alloc();
+    test_scoped_demangled_name();
     return 0;
 }