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+/*
+
+@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_QUALIFIED_class_of_HPP
+#define BOOST_CLBL_TRTS_QUALIFIED_class_of_HPP
+
+#include <boost/callable_traits/detail/core.hpp>
+
+namespace boost { namespace callable_traits {
+
+//[ qualified_class_of_hpp
+/*`
+[section:ref_qualified_class_of qualified_class_of]
+[heading Header]
+``#include <boost/callable_traits/qualified_class_of.hpp>``
+[heading Definition]
+*/
+
+template<typename T>
+using qualified_class_of_t = //see below
+//<-
+    detail::try_but_fail_if_invalid<
+        typename detail::traits<detail::shallow_decay<T>>::invoke_type,
+        type_is_not_a_member_pointer>;
+
+namespace detail {
+
+    template<typename T, typename = std::false_type>
+    struct qualified_class_of_impl {};
+
+    template<typename T>
+    struct qualified_class_of_impl <T, typename std::is_same<
+        qualified_class_of_t<T>, detail::dummy>::type>
+    {
+        using type = qualified_class_of_t<T>;
+    };
+}
+
+//->
+
+template<typename T>
+struct qualified_class_of : detail::qualified_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.
+* If `T` is a member function pointer, the aliased type is the parent class of the member, qualified according to the member qualifiers on `T`. If `T` does not have a member reference qualifier, then the aliased type will be an lvalue reference.
+* If `T` is a member data pointer, the aliased type is equivalent to `ct::class_of<T> const &`.
+
+[heading Input/Output Examples]
+[table
+    [[`T`]                              [`qualified_class_of_t<T>`]]
+    [[`void(foo::*)()`]                 [`foo &`]]
+    [[`void(foo::* volatile)() const`]           [`foo const &`]]
+    [[`void(foo::*)() &&`]              [`foo &&`]]
+    [[`void(foo::*&)() volatile &&`]     [`foo volatile &&`]]
+    [[`int foo::*`]                     [`foo const &`]]
+    [[`const int foo::*`]               [`foo const &`]]
+]
+
+[heading Example Program]
+[import ../example/qualified_class_of.cpp]
+[qualified_class_of]
+[endsect]
+*/
+//]
+
+#endif // #ifndef BOOST_CLBL_TRTS_QUALIFIED_class_of_HPP