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70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
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/*=============================================================================
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Copyright (c) 2007 Tobias Schwinger
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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 at
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http://www.boost.org/LICENSE_1_0.txt).
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==============================================================================*/
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#ifndef BOOST_FUNCTIONAL_VALUE_FACTORY_HPP_INCLUDED
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# ifndef BOOST_PP_IS_ITERATING
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# include <boost/preprocessor/iteration/iterate.hpp>
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# include <boost/preprocessor/repetition/enum_params.hpp>
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# include <boost/preprocessor/repetition/enum_binary_params.hpp>
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# include <new>
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# include <boost/pointee.hpp>
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# include <boost/get_pointer.hpp>
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# include <boost/non_type.hpp>
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# include <boost/type_traits/remove_cv.hpp>
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# ifndef BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY
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# define BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY 10
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# elif BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY < 3
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# undef BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY
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# define BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY 3
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# endif
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namespace boost
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{
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template< typename T >
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class value_factory;
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//----- ---- --- -- - - - -
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template< typename T >
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class value_factory
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{
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public:
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typedef T result_type;
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value_factory()
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{ }
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# define BOOST_PP_FILENAME_1 <boost/functional/value_factory.hpp>
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# define BOOST_PP_ITERATION_LIMITS (0,BOOST_FUNCTIONAL_VALUE_FACTORY_MAX_ARITY)
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# include BOOST_PP_ITERATE()
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};
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template< typename T > class value_factory<T&>;
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// forbidden, would create a dangling reference
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}
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# define BOOST_FUNCTIONAL_VALUE_FACTORY_HPP_INCLUDED
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# else // defined(BOOST_PP_IS_ITERATING)
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# define N BOOST_PP_ITERATION()
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# if N > 0
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template< BOOST_PP_ENUM_PARAMS(N, typename T) >
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# endif
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inline result_type operator()(BOOST_PP_ENUM_BINARY_PARAMS(N,T,& a)) const
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{
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return result_type(BOOST_PP_ENUM_PARAMS(N,a));
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}
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# undef N
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# endif // defined(BOOST_PP_IS_ITERATING)
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#endif // include guard
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