forked from boostorg/mpl
62 lines
1.7 KiB
C++
62 lines
1.7 KiB
C++
//-----------------------------------------------------------------------------
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// boost mpl/always.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) 2001-02
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// Aleksey Gurtovoy
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//
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// Permission to use, copy, modify, distribute and sell this software
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// and its documentation for any purpose is hereby granted without fee,
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// provided that the above copyright notice appears in all copies and
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// that both the copyright notice and this permission notice appear in
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// supporting documentation. No representations are made about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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#ifndef BOOST_MPL_ALWAYS_HPP_INCLUDED
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#define BOOST_MPL_ALWAYS_HPP_INCLUDED
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#include "boost/mpl/aux_/preprocessor/def_params_tail.hpp"
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#include "boost/mpl/limits/arity.hpp"
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#include "boost/mpl/void.hpp"
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#include "boost/mpl/aux_/arity.hpp"
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#include "boost/mpl/aux_/lambda_spec.hpp"
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#include "boost/mpl/aux_/config/dtp.hpp"
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#include "boost/config.hpp"
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namespace boost {
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namespace mpl {
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template< typename Value >
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struct always
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{
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template<
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typename T
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BOOST_MPL_PP_DEF_PARAMS_TAIL(1, typename T)
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>
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struct apply
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{
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typedef Value type;
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};
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};
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#if defined(BOOST_NO_DEFAULT_TEMPLATE_PARAMETERS_IN_NESTED_TEMPLATES)
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namespace aux {
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template< int N, typename T >
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struct arity< always<T>, N >
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{
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BOOST_STATIC_CONSTANT(int
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, value = BOOST_MPL_METAFUNCTION_MAX_ARITY
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);
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};
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}
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#endif
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BOOST_MPL_AUX_PASS_THROUGH_LAMBDA_SPEC(1,always)
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} // namespace mpl
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} // namespace boost
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#endif // BOOST_MPL_ALWAYS_HPP_INCLUDED
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