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https://github.com/bolero-MURAKAMI/Sprout.git
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29 lines
778 B
C++
29 lines
778 B
C++
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#ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_SUBSCRIPT_HPP
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#define SPROUT_FUNCTIONAL_POLYMORPHIC_SUBSCRIPT_HPP
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#include <utility>
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#include <sprout/config.hpp>
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#include <sprout/utility/forward.hpp>
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namespace sprout {
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//
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// subscript_t
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// subscript_
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//
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struct subscript_t {
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public:
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template<typename T, typename U>
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SPROUT_CONSTEXPR decltype(std::declval<T>()[std::declval<U>()])
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operator()(T&& x, U&& y)
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const SPROUT_NOEXCEPT_EXPR(SPROUT_NOEXCEPT_EXPR(std::declval<T>()[std::declval<U>()]))
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{
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return sprout::forward<T>(x)[sprout::forward<U>(y)];
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}
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};
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namespace {
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SPROUT_STATIC_CONSTEXPR sprout::subscript_t subscript_{};
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} // anonymous-namespace
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} // namespace sprout
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#endif // #ifndef SPROUT_FUNCTIONAL_POLYMORPHIC_SUBSCRIPT_HPP
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