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
21namespace boost { namespace mpl {
22
23namespace 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
42template <class T>
43struct 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

source code of include/boost/mpl/print.hpp