boost/type_traits/add_volatile.hpp
// (C) Copyright Dave Abrahams, Steve Cleary, Beman Dawes, Howard // Hinnant & John Maddock 2000. // Use, modification and distribution are subject to 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). // // See http://www.boost.org/libs/type_traits for most recent version including documentation. #ifndef BOOST_TT_ADD_VOLATILE_HPP_INCLUDED #define BOOST_TT_ADD_VOLATILE_HPP_INCLUDED #include <boost/config.hpp> namespace boost { // * convert a type T to volatile type - add_volatile<T> // this is not required since the result is always // the same as "T volatile", but it does suppress warnings // from some compilers: #if defined(BOOST_MSVC) // This bogus warning will appear when add_volatile is applied to a // const volatile reference because we can't detect const volatile // references with MSVC6. # pragma warning(push) # pragma warning(disable:4181) // warning C4181: qualifier applied to reference type ignored #endif template <class T> struct add_volatile{ typedef T volatile type; }; #if defined(BOOST_MSVC) # pragma warning(pop) #endif template <class T> struct add_volatile<T&>{ typedef T& type; }; #if !defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) template <class T> using add_volatile_t = typename add_volatile<T>::type; #endif } // namespace boost #endif // BOOST_TT_ADD_VOLATILE_HPP_INCLUDED