Atmosphere/stratosphere/loader/include/boost/callable_traits/is_reference_member.hpp

99 lines
2.8 KiB
C++
Raw Normal View History

/*
@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_IS_REFERENCE_MEMBER_HPP
#define BOOST_CLBL_TRTS_IS_REFERENCE_MEMBER_HPP
#include <boost/callable_traits/detail/core.hpp>
namespace boost { namespace callable_traits {
//[ is_reference_member_hpp
/*`[section:ref_is_reference_member is_reference_member]
[heading Header]
``#include <boost/callable_traits/is_reference_member.hpp>``
[heading Definition]
*/
// inherits from either std::true_type or std::false_type
template<typename T>
struct is_reference_member;
//<-
template<typename T>
struct is_reference_member : detail::traits<
detail::shallow_decay<T>>::is_reference_member {
using type = typename detail::traits<
detail::shallow_decay<T>>::is_reference_member;
};
#ifdef BOOST_CLBL_TRTS_DISABLE_VARIABLE_TEMPLATES
template<typename T>
struct is_reference_member_v {
static_assert(std::is_same<T, detail::dummy>::value,
"Variable templates not supported on this compiler.");
};
#else
//->
// only available when variable templates are supported
template<typename T>
//<-
BOOST_CLBL_TRAITS_INLINE_VAR
//->
constexpr bool is_reference_member_v = //see below
//<-
detail::traits<detail::shallow_decay<T>>::is_reference_member::value;
#endif
}} // namespace boost::callable_traits
//->
/*`
[heading Constraints]
* none
[heading Behavior]
* `is_reference_member<T>::value` is `true` when either:
* `T` is a function type with a '&' or '&&' member qualifier
* `T` is a pointer to a member function with a '&' or '&&' member qualifiers
* `T` is a function object with a non-overloaded `operator()`, where the `operator()` has a '&' or '&&' member qualifier
* On compilers that support variable templates, `is_reference_member_v<T>` is equivalent to `is_reference_member<T>::value`.
[heading Input/Output Examples]
[table
[[`T`] [`is_reference_member_v<T>`]]
[[`int() &`] [`true`]]
[[`int() const &&`] [`true`]]
[[`int(foo::* const)() &&`] [`true`]]
[[`int(foo::*)(...) volatile &`] [`true`]]
[[`int() const`] [`false`]]
[[`int() volatile`] [`false`]]
[[`int(foo::*)() const`] [`false`]]
[[`int() const`] [`false`]]
[[`int() volatile`] [`false`]]
[[`int(*)()`] [`false`]]
[[`int`] [`false`]]
[[`int foo::*`] [`false`]]
[[`const int foo::*`] [`false`]]
]
[heading Example Program]
[import ../example/is_reference_member.cpp]
[is_reference_member]
[endsect]
*/
//]
#endif // #ifndef BOOST_CLBL_TRTS_IS_REFERENCE_MEMBER_HPP