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- #ifndef BOOST_HANA_CONCEPT_APPLICATIVE_HPP
- #define BOOST_HANA_CONCEPT_APPLICATIVE_HPP
- #include <boost/hana/fwd/concept/applicative.hpp>
- #include <boost/hana/ap.hpp>
- #include <boost/hana/config.hpp>
- #include <boost/hana/core/default.hpp>
- #include <boost/hana/core/tag_of.hpp>
- #include <boost/hana/lift.hpp>
- BOOST_HANA_NAMESPACE_BEGIN
- template <typename A>
- struct Applicative {
- using Tag = typename tag_of<A>::type;
- static constexpr bool value = !is_default<ap_impl<Tag>>::value &&
- !is_default<lift_impl<Tag>>::value;
- };
- BOOST_HANA_NAMESPACE_END
- #endif
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