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71 lines
1.8 KiB
71 lines
1.8 KiB
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#ifndef BOOST_MPL_EVAL_IF_HPP_INCLUDED |
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#define BOOST_MPL_EVAL_IF_HPP_INCLUDED |
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// Copyright Aleksey Gurtovoy 2000-2004 |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See accompanying file LICENSE_1_0.txt or copy at |
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// http://www.boost.org/LICENSE_1_0.txt) |
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// |
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// See http://www.boost.org/libs/mpl for documentation. |
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// $Id: eval_if.hpp 61921 2010-05-11 21:33:24Z neilgroves $ |
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// $Date: 2010-05-11 17:33:24 -0400 (Tue, 11 May 2010) $ |
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// $Revision: 61921 $ |
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#include <boost/mpl/if.hpp> |
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#include <boost/mpl/aux_/na_spec.hpp> |
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#include <boost/mpl/aux_/lambda_support.hpp> |
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#include <boost/mpl/aux_/config/msvc.hpp> |
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#include <boost/mpl/aux_/config/gcc.hpp> |
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#include <boost/mpl/aux_/config/workaround.hpp> |
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namespace boost { namespace mpl { |
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template< |
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typename BOOST_MPL_AUX_NA_PARAM(C) |
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, typename BOOST_MPL_AUX_NA_PARAM(F1) |
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, typename BOOST_MPL_AUX_NA_PARAM(F2) |
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> |
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struct eval_if |
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \ |
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|| ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \ |
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&& BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \ |
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) |
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{ |
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typedef typename if_<C,F1,F2>::type f_; |
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typedef typename f_::type type; |
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#else |
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: if_<C,F1,F2>::type |
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{ |
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#endif |
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BOOST_MPL_AUX_LAMBDA_SUPPORT(3,eval_if,(C,F1,F2)) |
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}; |
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// (almost) copy & paste in order to save one more |
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// recursively nested template instantiation to user |
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template< |
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bool C |
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, typename F1 |
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, typename F2 |
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> |
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struct eval_if_c |
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#if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \ |
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|| ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \ |
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&& BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \ |
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) |
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{ |
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typedef typename if_c<C,F1,F2>::type f_; |
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typedef typename f_::type type; |
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#else |
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: if_c<C,F1,F2>::type |
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{ |
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#endif |
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}; |
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BOOST_MPL_AUX_NA_SPEC(3, eval_if) |
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}} |
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#endif // BOOST_MPL_EVAL_IF_HPP_INCLUDED
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