Fix addressof for nullptr_t values. Fixes #5487.

addressof_np_test.cpp

@@ -0,0 +1,50 @@
+//
+// Copyright 2013 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/utility/addressof.hpp>
+#include <boost/detail/lightweight_test.hpp>
+#include <cstddef>
+
+#if defined( BOOST_NO_CXX11_NULLPTR )
+
+void nullptr_test()
+{
+}
+
+#else
+
+void nullptr_test()
+{
+    {
+        auto x = nullptr;
+        BOOST_TEST( boost::addressof(x) == &x );
+    }
+
+    {
+        auto const x = nullptr;
+        BOOST_TEST( boost::addressof(x) == &x );
+    }
+
+    {
+        auto volatile x = nullptr;
+        BOOST_TEST( boost::addressof(x) == &x );
+    }
+
+    {
+        auto const volatile x = nullptr;
+        BOOST_TEST( boost::addressof(x) == &x );
+    }
+}
+
+#endif
+
+int main()
+{
+    nullptr_test();
+    return boost::report_errors();
+}

include/boost/utility/addressof.hpp

@@ -1,7 +1,7 @@
 // Copyright (C) 2002 Brad King (brad.king@kitware.com)
 //                    Douglas Gregor (gregod@cs.rpi.edu)
 //
-// Copyright (C) 2002, 2008 Peter Dimov
+// Copyright (C) 2002, 2008, 2013 Peter Dimov
 //
 // Distributed under the Boost Software License, Version 1.0. (See
 // accompanying file LICENSE_1_0.txt or copy at
@@ -14,6 +14,7 @@
 
 # include <boost/config.hpp>
 # include <boost/detail/workaround.hpp>
+# include <cstddef>
 
 namespace boost
 {
@@ -46,6 +47,60 @@ template<class T> struct addressof_impl
     }
 };
 
+#if !defined( BOOST_NO_CXX11_NULLPTR )
+
+#if defined( __clang__ ) && !defined( _LIBCPP_VERSION ) && !defined( BOOST_NO_CXX11_DECLTYPE )
+
+    typedef decltype(nullptr) addr_nullptr_t;
+
+#else
+
+    typedef std::nullptr_t addr_nullptr_t;
+
+#endif
+
+template<> struct addressof_impl< addr_nullptr_t >
+{
+    typedef addr_nullptr_t T;
+
+    static BOOST_FORCEINLINE T * f( T & v, int )
+    {
+        return &v;
+    }
+};
+
+template<> struct addressof_impl< addr_nullptr_t const >
+{
+    typedef addr_nullptr_t const T;
+
+    static BOOST_FORCEINLINE T * f( T & v, int )
+    {
+        return &v;
+    }
+};
+
+template<> struct addressof_impl< addr_nullptr_t volatile >
+{
+    typedef addr_nullptr_t volatile T;
+
+    static BOOST_FORCEINLINE T * f( T & v, int )
+    {
+        return &v;
+    }
+};
+
+template<> struct addressof_impl< addr_nullptr_t const volatile >
+{
+    typedef addr_nullptr_t const volatile T;
+
+    static BOOST_FORCEINLINE T * f( T & v, int )
+    {
+        return &v;
+    }
+};
+
+#endif
+
 } // namespace detail
 
 template<class T>

test/Jamfile.v2

@@ -17,6 +17,7 @@ alias unit_test_framework
 test-suite utility
     :
         [ run ../addressof_fn_test.cpp ]
+        [ run ../addressof_np_test.cpp ]
         [ run ../addressof_test.cpp ]
         [ run ../addressof_test2.cpp ]
         [ run ../assert_test.cpp ]