/* @Copyright Barrett Adair 2015-2017 Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) */ #ifndef BOOST_CLBL_TRTS_class_of_HPP #define BOOST_CLBL_TRTS_class_of_HPP #include <boost/callable_traits/detail/core.hpp> namespace boost { namespace callable_traits { //[ class_of_hpp /*` [section:ref_class_of class_of] [heading Header] ``#include <boost/callable_traits/class_of.hpp>`` [heading Definition] */ template<typename T> using class_of_t = //see below //<- detail::try_but_fail_if_invalid< typename detail::traits<detail::shallow_decay<T>>::class_type, type_is_not_a_member_pointer>; namespace detail { template<typename T, typename = std::false_type> struct class_of_impl {}; template<typename T> struct class_of_impl <T, typename std::is_same< class_of_t<T>, detail::dummy>::type> { using type = class_of_t<T>; }; } //-> template<typename T> struct class_of : detail::class_of_impl<T> {}; //<- }} // namespace boost::callable_traits //-> /*` [heading Constraints] * `T` must be a member pointer [heading Behavior] * A substitution failure occurs if the constraints are violated. * The aliased type is the parent class of the member. In other words, if `T` is expanded to `U C::*`, the aliased type is `C`. [heading Input/Output Examples] [table [[`T`] [`class_of_t<T>`]] [[`int foo::*`] [`foo`]] [[`void(foo::* const &)() const`] [`foo`]] ] [heading Example Program] [import ../example/class_of.cpp] [class_of] [endsect] */ //] #endif // #ifndef BOOST_CLBL_TRTS_class_of_HPP