forked from boostorg/mpl
57 lines
1.2 KiB
C++
57 lines
1.2 KiB
C++
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#ifndef BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
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#define BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
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// + file: boost/mpl/aux_/yes_no.hpp
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// + last modified: 05/nov/03
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// Copyright Aleksey Gurtovoy 2000-03
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//
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// Use, modification and distribution are subject to the Boost Software
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// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy
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// at 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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#include "boost/mpl/aux_/config/workaround.hpp"
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#include "boost/mpl/aux_/config/msvc.hpp"
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namespace boost { namespace mpl { namespace aux {
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typedef char (&no_tag)[1];
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typedef char (&yes_tag)[2];
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template< bool C_ > struct yes_no_tag
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{
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typedef no_tag type;
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};
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template<> struct yes_no_tag<true>
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{
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typedef yes_tag type;
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};
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template< long n > struct weighted_tag
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{
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#if !BOOST_WORKAROUND(BOOST_MSVC, == 1200)
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typedef char (&type)[n];
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#else
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char buf[n];
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typedef weighted_tag type;
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#endif
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};
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#if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x561)) \
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|| BOOST_WORKAROUND(BOOST_MSVC, == 1300)
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template<> struct weighted_tag<0>
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{
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typedef char (&type)[1];
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};
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#endif
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}}} // namespace boost::mpl::aux
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#endif // BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
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