2 #ifndef BOOST_MPL_EVAL_IF_HPP_INCLUDED
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3 #define BOOST_MPL_EVAL_IF_HPP_INCLUDED
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5 // Copyright Aleksey Gurtovoy 2000-2004
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7 // Distributed under the Boost Software License, Version 1.0.
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8 // (See accompanying file LICENSE_1_0.txt or copy at
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9 // http://www.boost.org/LICENSE_1_0.txt)
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11 // See http://www.boost.org/libs/mpl for documentation.
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13 // $Id: eval_if.hpp 49267 2008-10-11 06:19:02Z agurtovoy $
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14 // $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $
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15 // $Revision: 49267 $
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17 #include <boost/mpl/if.hpp>
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18 #include <boost/mpl/aux_/na_spec.hpp>
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19 #include <boost/mpl/aux_/lambda_support.hpp>
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20 #include <boost/mpl/aux_/config/msvc.hpp>
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21 #include <boost/mpl/aux_/config/gcc.hpp>
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22 #include <boost/mpl/aux_/config/workaround.hpp>
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24 namespace boost { namespace mpl {
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27 typename BOOST_MPL_AUX_NA_PARAM(C)
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28 , typename BOOST_MPL_AUX_NA_PARAM(F1)
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29 , typename BOOST_MPL_AUX_NA_PARAM(F2)
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32 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \
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33 || ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \
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34 && BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \
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37 typedef typename if_<C,F1,F2>::type f_;
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38 typedef typename f_::type type;
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40 : if_<C,F1,F2>::type
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43 BOOST_MPL_AUX_LAMBDA_SUPPORT(3,eval_if,(C,F1,F2))
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46 // (almost) copy & paste in order to save one more
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47 // recursively nested template instantiation to user
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54 #if BOOST_WORKAROUND(BOOST_MSVC, <= 1300) \
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55 || ( BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, >= 0x0300) \
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56 && BOOST_WORKAROUND(BOOST_MPL_CFG_GCC, BOOST_TESTED_AT(0x0304)) \
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59 typedef typename if_c<C,F1,F2>::type f_;
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60 typedef typename f_::type type;
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62 : if_c<C,F1,F2>::type
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67 BOOST_MPL_AUX_NA_SPEC(3, eval_if)
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71 #endif // BOOST_MPL_EVAL_IF_HPP_INCLUDED
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