Chris@102: // Copyright (C) 2002 Brad King (brad.king@kitware.com)
Chris@102: //                    Douglas Gregor (gregod@cs.rpi.edu)
Chris@102: //
Chris@102: // Copyright (C) 2002, 2008, 2013 Peter Dimov
Chris@102: //
Chris@102: // Distributed under the Boost Software License, Version 1.0. (See
Chris@102: // accompanying file LICENSE_1_0.txt or copy at
Chris@102: // http://www.boost.org/LICENSE_1_0.txt)
Chris@102: 
Chris@102: // For more information, see http://www.boost.org
Chris@102: 
Chris@102: #ifndef BOOST_CORE_ADDRESSOF_HPP
Chris@102: #define BOOST_CORE_ADDRESSOF_HPP
Chris@102: 
Chris@102: # include <boost/config.hpp>
Chris@102: # include <boost/detail/workaround.hpp>
Chris@102: # include <cstddef>
Chris@102: 
Chris@102: namespace boost
Chris@102: {
Chris@102: 
Chris@102: namespace detail
Chris@102: {
Chris@102: 
Chris@102: template<class T> struct addr_impl_ref
Chris@102: {
Chris@102:     T & v_;
Chris@102: 
Chris@102:     BOOST_FORCEINLINE addr_impl_ref( T & v ): v_( v ) {}
Chris@102:     BOOST_FORCEINLINE operator T& () const { return v_; }
Chris@102: 
Chris@102: private:
Chris@102:     addr_impl_ref & operator=(const addr_impl_ref &);
Chris@102: };
Chris@102: 
Chris@102: template<class T> struct addressof_impl
Chris@102: {
Chris@102:     static BOOST_FORCEINLINE T * f( T & v, long )
Chris@102:     {
Chris@102:         return reinterpret_cast<T*>(
Chris@102:             &const_cast<char&>(reinterpret_cast<const volatile char &>(v)));
Chris@102:     }
Chris@102: 
Chris@102:     static BOOST_FORCEINLINE T * f( T * v, int )
Chris@102:     {
Chris@102:         return v;
Chris@102:     }
Chris@102: };
Chris@102: 
Chris@102: #if !defined( BOOST_NO_CXX11_NULLPTR )
Chris@102: 
Chris@102: #if !defined( BOOST_NO_CXX11_DECLTYPE ) && ( ( defined( __clang__ ) && !defined( _LIBCPP_VERSION ) ) || defined( __INTEL_COMPILER ) )
Chris@102: 
Chris@102:     typedef decltype(nullptr) addr_nullptr_t;
Chris@102: 
Chris@102: #else
Chris@102: 
Chris@102:     typedef std::nullptr_t addr_nullptr_t;
Chris@102: 
Chris@102: #endif
Chris@102: 
Chris@102: template<> struct addressof_impl< addr_nullptr_t >
Chris@102: {
Chris@102:     typedef addr_nullptr_t T;
Chris@102: 
Chris@102:     static BOOST_FORCEINLINE T * f( T & v, int )
Chris@102:     {
Chris@102:         return &v;
Chris@102:     }
Chris@102: };
Chris@102: 
Chris@102: template<> struct addressof_impl< addr_nullptr_t const >
Chris@102: {
Chris@102:     typedef addr_nullptr_t const T;
Chris@102: 
Chris@102:     static BOOST_FORCEINLINE T * f( T & v, int )
Chris@102:     {
Chris@102:         return &v;
Chris@102:     }
Chris@102: };
Chris@102: 
Chris@102: template<> struct addressof_impl< addr_nullptr_t volatile >
Chris@102: {
Chris@102:     typedef addr_nullptr_t volatile T;
Chris@102: 
Chris@102:     static BOOST_FORCEINLINE T * f( T & v, int )
Chris@102:     {
Chris@102:         return &v;
Chris@102:     }
Chris@102: };
Chris@102: 
Chris@102: template<> struct addressof_impl< addr_nullptr_t const volatile >
Chris@102: {
Chris@102:     typedef addr_nullptr_t const volatile T;
Chris@102: 
Chris@102:     static BOOST_FORCEINLINE T * f( T & v, int )
Chris@102:     {
Chris@102:         return &v;
Chris@102:     }
Chris@102: };
Chris@102: 
Chris@102: #endif
Chris@102: 
Chris@102: } // namespace detail
Chris@102: 
Chris@102: template<class T>
Chris@102: BOOST_FORCEINLINE
Chris@102: T * addressof( T & v )
Chris@102: {
Chris@102: #if (defined( __BORLANDC__ ) && BOOST_WORKAROUND( __BORLANDC__, BOOST_TESTED_AT( 0x610 ) ) ) || (defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x5120))
Chris@102: 
Chris@102:     return boost::detail::addressof_impl<T>::f( v, 0 );
Chris@102: 
Chris@102: #else
Chris@102: 
Chris@102:     return boost::detail::addressof_impl<T>::f( boost::detail::addr_impl_ref<T>( v ), 0 );
Chris@102: 
Chris@102: #endif
Chris@102: }
Chris@102: 
Chris@102: #if defined( __SUNPRO_CC ) && BOOST_WORKAROUND( __SUNPRO_CC, BOOST_TESTED_AT( 0x590 ) )
Chris@102: 
Chris@102: namespace detail
Chris@102: {
Chris@102: 
Chris@102: template<class T> struct addressof_addp
Chris@102: {
Chris@102:     typedef T * type;
Chris@102: };
Chris@102: 
Chris@102: } // namespace detail
Chris@102: 
Chris@102: template< class T, std::size_t N >
Chris@102: BOOST_FORCEINLINE
Chris@102: typename detail::addressof_addp< T[N] >::type addressof( T (&t)[N] )
Chris@102: {
Chris@102:     return &t;
Chris@102: }
Chris@102: 
Chris@102: #endif
Chris@102: 
Chris@102: // Borland doesn't like casting an array reference to a char reference
Chris@102: // but these overloads work around the problem.
Chris@102: #if defined( __BORLANDC__ ) && BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564))
Chris@102: template<typename T,std::size_t N>
Chris@102: BOOST_FORCEINLINE
Chris@102: T (*addressof(T (&t)[N]))[N]
Chris@102: {
Chris@102:    return reinterpret_cast<T(*)[N]>(&t);
Chris@102: }
Chris@102: 
Chris@102: template<typename T,std::size_t N>
Chris@102: BOOST_FORCEINLINE
Chris@102: const T (*addressof(const T (&t)[N]))[N]
Chris@102: {
Chris@102:    return reinterpret_cast<const T(*)[N]>(&t);
Chris@102: }
Chris@102: #endif
Chris@102: 
Chris@102: } // namespace boost
Chris@102: 
Chris@102: #endif // BOOST_CORE_ADDRESSOF_HPP