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46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2016 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_WEED_TRAITS_EXPR_IS_EXPR_HPP
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#define SPROUT_WEED_TRAITS_EXPR_IS_EXPR_HPP
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/type_traits/integral_constant.hpp>
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#include <sprout/weed/expr/expr_fwd.hpp>
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namespace sprout {
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namespace weed {
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namespace traits {
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//
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// is_expr
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//
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template<typename T>
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struct is_expr
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: public sprout::false_type
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{};
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template<typename T>
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struct is_expr<T const>
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: public sprout::weed::traits::is_expr<T>
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{};
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template<typename T>
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struct is_expr<T volatile>
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: public sprout::weed::traits::is_expr<T>
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{};
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template<typename T>
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struct is_expr<T const volatile>
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: public sprout::weed::traits::is_expr<T>
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{};
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template<typename Tag, typename... Args>
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struct is_expr<sprout::weed::expr<Tag, Args...> >
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: public sprout::true_type
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{};
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} // namespace traits
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} // namespace weed
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} // namespace sprout
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#endif // #ifndef SPROUT_WEED_TRAITS_EXPR_IS_EXPR_HPP
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