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30 lines
729 B
C++
30 lines
729 B
C++
#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/weed/expr/expr.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 std::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 Tag, typename... Args>
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struct is_expr<sprout::weed::expr<Tag, Args...> >
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: public std::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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