From 13d1a807ad9797f5e0ff8f2e8d3b88ff80f94467 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@pdimov.com>
Date: Fri, 6 Jun 2014 15:49:29 +0300
Subject: [PATCH] Add core::demangled_name.

---
 include/boost/core/demangled_name.hpp         | 103 ++++++++++++++++++
 include/boost/core/lightweight_test_trait.hpp |   3 +-
 test/Jamfile.v2                               |   2 +
 test/demangled_name_test.cpp                  |  24 ++++
 4 files changed, 131 insertions(+), 1 deletion(-)
 create mode 100644 include/boost/core/demangled_name.hpp
 create mode 100644 test/demangled_name_test.cpp

diff --git a/include/boost/core/demangled_name.hpp b/include/boost/core/demangled_name.hpp
new file mode 100644
index 0000000..c2de377
--- /dev/null
+++ b/include/boost/core/demangled_name.hpp
@@ -0,0 +1,103 @@
+#ifndef BOOST_CORE_DEMANGLED_NAME_HPP_INCLUDED
+#define BOOST_CORE_DEMANGLED_NAME_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+// core::demangled_name( BOOST_CORE_TYPEID(T) )
+//
+// Copyright 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/config.hpp>
+#include <boost/core/typeinfo.hpp>
+#include <string>
+
+#if defined(__GLIBCXX__) || defined(__GLIBCPP__)
+# include <cxxabi.h>
+# include <cstdlib>
+# include <cstddef>
+# define BOOST_CORE_HAS_CXXABI_H
+#endif
+
+namespace boost
+{
+
+namespace core
+{
+
+namespace detail
+{
+
+#if defined( BOOST_CORE_HAS_CXXABI_H )
+
+// lifted from boost/exception/detail/type_info.hpp
+
+inline std::string demangle( char const * name )
+{
+    struct auto_free
+    {
+        explicit auto_free( char * ptr ): p( ptr )
+        {
+        }
+
+        ~auto_free()
+        {
+            std::free( p );
+        }
+
+        char * p;
+    };
+
+    int status = 0;
+    std::size_t size = 0;
+
+    auto_free demangled( abi::__cxa_demangle( name, NULL, &size, &status ) );
+
+    if( demangled.p )
+    {
+        return demangled.p;
+    }
+    else
+    {
+        return name;
+    }
+}
+
+#else
+
+inline std::string demangle( char const * name )
+{
+    return name;
+}
+
+#endif
+
+} // namespace detail
+
+inline std::string demangled_name( core::typeinfo const & ti )
+{
+#if defined( BOOST_NO_TYPEID )
+
+    return ti.name();
+
+#else
+
+    return core::detail::demangle( ti.name() );
+
+#endif
+}
+
+} // namespace core
+
+} // namespace boost
+
+#undef BOOST_CORE_HAS_CXXABI_H
+
+#endif // #ifndef BOOST_CORE_DEMANGLED_NAME_HPP_INCLUDED
diff --git a/include/boost/core/lightweight_test_trait.hpp b/include/boost/core/lightweight_test_trait.hpp
index 7eb4936..d8e756c 100644
--- a/include/boost/core/lightweight_test_trait.hpp
+++ b/include/boost/core/lightweight_test_trait.hpp
@@ -19,6 +19,7 @@
 
 #include <boost/core/lightweight_test.hpp>
 #include <boost/core/typeinfo.hpp>
+#include <boost/core/demangled_name.hpp>
 
 namespace boost
 {
@@ -36,7 +37,7 @@ template< class T > inline void test_trait_impl( char const * trait, void (*)( T
     {
         BOOST_LIGHTWEIGHT_TEST_OSTREAM
             << file << "(" << line << "): predicate '" << trait << "' ["
-            << BOOST_CORE_TYPEID(T).name() << "]"
+            << boost::core::demangled_name( BOOST_CORE_TYPEID(T) ) << "]"
             << " test failed in function '" << function
             << "' (should have been " << ( expected? "true": "false" ) << ")"
             << std::endl;
diff --git a/test/Jamfile.v2 b/test/Jamfile.v2
index 8b87ea0..a1fdd4a 100644
--- a/test/Jamfile.v2
+++ b/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 ;
diff --git a/test/demangled_name_test.cpp b/test/demangled_name_test.cpp
new file mode 100644
index 0000000..06da694
--- /dev/null
+++ b/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;
+}