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// (C) Copyright Tobias Schwinger
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//
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// Use modification and distribution are subject to the boost Software License,
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// Version 1.0. (See http://www.boost.org/LICENSE_1_0.txt).
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//------------------------------------------------------------------------------
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#ifndef BOOST_FT_DETAIL_TO_SEQUENCE_HPP_INCLUDED
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#define BOOST_FT_DETAIL_TO_SEQUENCE_HPP_INCLUDED
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#include <boost/mpl/eval_if.hpp>
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#include <boost/mpl/identity.hpp>
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#include <boost/mpl/is_sequence.hpp>
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#include <boost/mpl/placeholders.hpp>
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#include <boost/type_traits/add_reference.hpp>
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#include <boost/function_types/is_callable_builtin.hpp>
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namespace boost { namespace function_types { namespace detail {
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// wrap first arguments in components, if callable builtin type
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template<typename T>
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struct to_sequence
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{
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typedef typename
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mpl::eval_if
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< is_callable_builtin<T>
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, to_sequence< components<T> >
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, mpl::identity< T >
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>::type
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type;
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};
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// reduce template instantiations, if possible
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template<typename T, typename U>
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struct to_sequence< components<T,U> >
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{
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typedef typename components<T,U>::types type;
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};
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} } } // namespace ::boost::function_types::detail
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#endif
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