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[857] | 1 | // (C) Copyright John Maddock & Thorsten Ottosen 2005.
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| 2 | // Use, modification and distribution are subject to the Boost Software License,
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| 3 | // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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| 4 | // http://www.boost.org/LICENSE_1_0.txt).
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| 5 | //
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| 6 | // See http://www.boost.org/libs/type_traits for most recent version including documentation.
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| 7 |
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| 8 |
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| 9 | #ifndef BOOST_TT_DECAY_HPP_INCLUDED
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| 10 | #define BOOST_TT_DECAY_HPP_INCLUDED
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| 11 |
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| 12 | #include "boost/type_traits/config.hpp"
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| 13 | #include <boost/type_traits/is_array.hpp>
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| 14 | #include <boost/type_traits/is_function.hpp>
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| 15 | #include <boost/type_traits/remove_bounds.hpp>
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| 16 | #include <boost/type_traits/add_pointer.hpp>
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| 17 | #include <boost/type_traits/remove_reference.hpp>
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| 18 | #include <boost/mpl/eval_if.hpp>
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| 19 | #include <boost/mpl/identity.hpp>
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| 20 |
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| 21 | namespace boost
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| 22 | {
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| 23 |
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| 24 | template< class T >
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| 25 | struct decay
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| 26 | {
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| 27 | private:
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| 28 | typedef BOOST_DEDUCED_TYPENAME remove_reference<T>::type Ty;
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| 29 | public:
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| 30 | typedef BOOST_DEDUCED_TYPENAME mpl::eval_if<
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| 31 | is_array<Ty>,
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| 32 | mpl::identity<BOOST_DEDUCED_TYPENAME remove_bounds<Ty>::type*>,
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| 33 | BOOST_DEDUCED_TYPENAME mpl::eval_if<
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| 34 | is_function<Ty>,
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| 35 | add_pointer<Ty>,
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| 36 | mpl::identity<Ty>
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| 37 | >
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| 38 | >::type type;
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| 39 | };
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| 40 |
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| 41 | } // namespace boost
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| 42 |
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| 43 |
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| 44 | #endif // BOOST_TT_DECAY_HPP_INCLUDED
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