#ifndef BOOST_MPL_EVAL_IF_HPP_INCLUDED | |
#define BOOST_MPL_EVAL_IF_HPP_INCLUDED | |
// Copyright Aleksey Gurtovoy 2000-2004 | |
// | |
// 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/mpl for documentation. | |
// $Id: eval_if.hpp 61921 2010-05-11 21:33:24Z neilgroves $ | |
// $Date: 2010-05-11 17:33:24 -0400 (Tue, 11 May 2010) $ | |
// $Revision: 61921 $ | |
#include <boost/mpl/if.hpp> | |
#include <boost/mpl/aux_/na_spec.hpp> | |
#include <boost/mpl/aux_/lambda_support.hpp> | |
#include <boost/mpl/aux_/config/msvc.hpp> | |
#include <boost/mpl/aux_/config/gcc.hpp> | |
#include <boost/mpl/aux_/config/workaround.hpp> | |
namespace boost { namespace mpl { | |
template< | |
typename BOOST_MPL_AUX_NA_PARAM(C) | |
, typename BOOST_MPL_AUX_NA_PARAM(F1) | |
, typename BOOST_MPL_AUX_NA_PARAM(F2) | |
> | |
struct eval_if | |
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \ | |
|| ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \ | |
&& BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \ | |
) | |
{ | |
typedef typename if_<C,F1,F2>::type f_; | |
typedef typename f_::type type; | |
#else | |
: if_<C,F1,F2>::type | |
{ | |
#endif | |
BOOST_MPL_AUX_LAMBDA_SUPPORT(3,eval_if,(C,F1,F2)) | |
}; | |
// (almost) copy & paste in order to save one more | |
// recursively nested template instantiation to user | |
template< | |
bool C | |
, typename F1 | |
, typename F2 | |
> | |
struct eval_if_c | |
#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \ | |
|| ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \ | |
&& BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \ | |
) | |
{ | |
typedef typename if_c<C,F1,F2>::type f_; | |
typedef typename f_::type type; | |
#else | |
: if_c<C,F1,F2>::type | |
{ | |
#endif | |
}; | |
BOOST_MPL_AUX_NA_SPEC(3, eval_if) | |
}} | |
#endif // BOOST_MPL_EVAL_IF_HPP_INCLUDED |