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59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
//-----------------------------------------------------------------------------
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// boost variant/detail/substitute_fwd.hpp header file
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// See http://www.boost.org for updates, documentation, and revision history.
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//-----------------------------------------------------------------------------
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//
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// Copyright (c) 2003
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// Eric Friedman
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// 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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#ifndef BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
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#define BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
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#include <boost/mpl/aux_/lambda_arity_param.hpp>
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#include <boost/mpl/aux_/template_arity.hpp>
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#include <boost/mpl/int_fwd.hpp>
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///////////////////////////////////////////////////////////////////////////////
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// BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
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//
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// Defined if 'substitute' is not implementable on the current compiler.
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//
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#include <boost/mpl/aux_/config/ctps.hpp>
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#include <boost/mpl/aux_/config/ttp.hpp>
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#if defined(BOOST_NO_TEMPLATE_TEMPLATE_PARAMETERS) \
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&& !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
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# define BOOST_VARIANT_DETAIL_NO_SUBSTITUTE
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#endif
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namespace boost {
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namespace detail { namespace variant {
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#if !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
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///////////////////////////////////////////////////////////////////////////////
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// metafunction substitute
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//
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// Substitutes one type for another in the given type expression.
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//
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template <
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typename T, typename Dest, typename Source
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BOOST_MPL_AUX_LAMBDA_ARITY_PARAM(
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typename Arity = mpl::int_< mpl::aux::template_arity<T>::value >
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)
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>
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struct substitute;
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#endif // !defined(BOOST_VARIANT_DETAIL_NO_SUBSTITUTE)
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}} // namespace detail::variant
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} // namespace boost
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#endif // BOOST_VARIANT_DETAIL_SUBSTITUTE_FWD_HPP
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