| 1 | /* Copyright 2016-2017 Joaquin M Lopez Munoz. |
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| 2 | * Distributed under the Boost Software License, Version 1.0. |
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| 3 | * (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/poly_collection for library home page. |
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| 7 | */ |
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| 8 | |
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| 9 | #ifndef BOOST_POLY_COLLECTION_DETAIL_IS_ACCEPTABLE_HPP |
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| 10 | #define BOOST_POLY_COLLECTION_DETAIL_IS_ACCEPTABLE_HPP |
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| 11 | |
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| 12 | #if defined(_MSC_VER) |
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| 13 | #pragma once |
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| 14 | #endif |
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| 15 | |
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| 16 | #include <type_traits> |
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| 17 | |
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| 18 | namespace boost{ |
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| 19 | |
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| 20 | namespace poly_collection{ |
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| 21 | |
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| 22 | namespace detail{ |
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| 23 | |
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| 24 | /* This can be further specialized by Model when the std type trait classes |
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| 25 | * fail to give the right info (as it can happen with class templates whose |
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| 26 | * nominally existing operators do not compile for certain instantiations). |
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| 27 | */ |
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| 28 | |
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| 29 | template<typename T,typename Model,typename=void> |
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| 30 | struct is_acceptable:std::integral_constant< |
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| 31 | bool, |
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| 32 | Model::template is_implementation<T>::value&& |
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| 33 | std::is_move_constructible<typename std::decay<T>::type>::value&& |
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| 34 | (std::is_move_assignable<typename std::decay<T>::type>::value|| |
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| 35 | std::is_nothrow_move_constructible<typename std::decay<T>::type>::value) |
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| 36 | >{}; |
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| 37 | |
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| 38 | } /* namespace poly_collection::detail */ |
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| 39 | |
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| 40 | } /* namespace poly_collection */ |
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| 41 | |
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| 42 | } /* namespace boost */ |
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| 43 | |
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| 44 | #endif |
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| 45 | |
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