1 2 #ifndef BOOST_MPL_PRINT_HPP_INCLUDED 3 #define BOOST_MPL_PRINT_HPP_INCLUDED 4 5 // Copyright David Abrahams 2003 6 // Copyright Aleksey Gurtovoy 2004 7 // 8 // Distributed under the Boost Software License, Version 1.0. 9 // (See accompanying file LICENSE_1_0.txt or copy at 10 // http://www.boost.org/LICENSE_1_0.txt) 11 // 12 // See http://www.boost.org/libs/mpl for documentation. 13 14 // $Id$ 15 // $Date$ 16 // $Revision$ 17 18 #include <boost/mpl/aux_/config/msvc.hpp> 19 #include <boost/mpl/identity.hpp> 20 21 namespace boost { namespace mpl { 22 23 namespace aux { 24 #if defined(BOOST_MSVC) 25 # pragma warning(push, 3) 26 // we only want one warning from MSVC, so turn off the other one 27 # pragma warning(disable: 4307) 28 #elif defined(__MWERKS__) 29 # pragma warn_hidevirtual on 30 struct print_base { virtual void f() {} }; 31 #endif 32 33 #if defined(__EDG_VERSION__) 34 template <class T> 35 struct dependent_unsigned 36 { 37 static const unsigned value = 1; 38 }; 39 #endif 40 } // namespace aux 41 42 template <class T> 43 struct print 44 : mpl::identity<T> 45 #if defined(__MWERKS__) 46 , aux::print_base 47 #endif 48 { 49 #if defined(__clang__) 50 # pragma clang diagnostic push 51 # pragma clang diagnostic ignored "-Wc++11-extensions" 52 const int m_x = 1 / (sizeof(T) - sizeof(T)); 53 # pragma clang diagnostic pop 54 #elif defined(BOOST_MSVC) 55 enum { n = sizeof(T) + -1 }; 56 #elif defined(__MWERKS__) 57 void f(int); 58 #else 59 enum { 60 n = 61 # if defined(__EDG_VERSION__) 62 aux::dependent_unsigned<T>::value > -1 63 # else 64 sizeof(T) > -1 65 # endif 66 }; 67 #endif 68 }; 69 70 #if defined(BOOST_MSVC) 71 # pragma warning(pop) 72 #elif defined(__MWERKS__) 73 # pragma warn_hidevirtual reset 74 #endif 75 76 }} 77 78 #endif // BOOST_MPL_PRINT_HPP_INCLUDED 79