| /* Copyright 2003-2008 Joaquin M Lopez Munoz. |
| * 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) |
| * |
| * See http://www.boost.org/libs/multi_index for library home page. |
| */ |
| |
| #ifndef BOOST_MULTI_INDEX_DETAIL_PREVENT_ETI_HPP |
| #define BOOST_MULTI_INDEX_DETAIL_PREVENT_ETI_HPP |
| |
| #if defined(_MSC_VER)&&(_MSC_VER>=1200) |
| #pragma once |
| #endif |
| |
| #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ |
| #include <boost/detail/workaround.hpp> |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC,<1300) |
| #include <boost/mpl/if.hpp> |
| #include <boost/mpl/integral_c.hpp> |
| #include <boost/mpl/aux_/msvc_never_true.hpp> |
| #endif |
| |
| namespace boost{ |
| |
| namespace multi_index{ |
| |
| namespace detail{ |
| |
| #if BOOST_WORKAROUND(BOOST_MSVC,<1300) |
| /* See |
| * http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl?Effective_MPL |
| * Item 5.6, Beware of the 'early template instantiation' trap. |
| */ |
| |
| template<typename Type,typename Construct> |
| struct prevent_eti |
| { |
| typedef typename mpl::if_< |
| mpl::aux::msvc_never_true<Type>, |
| mpl::integral_c<int,0>, |
| Construct |
| >::type type; |
| }; |
| #else |
| template<typename Type,typename Construct> |
| struct prevent_eti |
| { |
| typedef Construct type; |
| }; |
| #endif |
| |
| } /* namespace multi_index::detail */ |
| |
| } /* namespace multi_index */ |
| |
| } /* namespace boost */ |
| |
| #endif |