mirror of
https://github.com/Atmosphere-NX/Atmosphere
synced 2024-12-23 21:01:13 +00:00
98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
|
/*
|
||
|
|
|
||
|
|
@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_CONST_MEMBER_HPP
|
||
|
|
#define BOOST_CLBL_TRTS_IS_CONST_MEMBER_HPP
|
||
|
|
|
||
|
|
#include <boost/callable_traits/detail/core.hpp>
|
||
|
|
|
||
|
|
namespace boost { namespace callable_traits {
|
||
|
|
|
||
|
|
//[ is_const_member_hpp
|
||
|
|
/*`[section:ref_is_const_member is_const_member]
|
||
|
|
[heading Header]
|
||
|
|
``#include <boost/callable_traits/is_const_member.hpp>``
|
||
|
|
[heading Definition]
|
||
|
|
*/
|
||
|
|
|
||
|
|
// inherits from either std::true_type or std::false_type
|
||
|
|
template<typename T>
|
||
|
|
struct is_const_member;
|
||
|
|
|
||
|
|
//<-
|
||
|
|
template<typename T>
|
||
|
|
struct is_const_member
|
||
|
|
: detail::traits<detail::shallow_decay<T>>::is_const_member {
|
||
|
|
using type = typename detail::traits<
|
||
|
|
detail::shallow_decay<T>>::is_const_member;
|
||
|
|
};
|
||
|
|
|
||
|
|
#ifdef BOOST_CLBL_TRTS_DISABLE_VARIABLE_TEMPLATES
|
||
|
|
|
||
|
|
template<typename T>
|
||
|
|
struct is_const_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_const_member_v = //see below
|
||
|
|
//<-
|
||
|
|
detail::traits<detail::shallow_decay<T>>::is_const_member::value;
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
}} // namespace boost::callable_traits
|
||
|
|
//->
|
||
|
|
|
||
|
|
/*`
|
||
|
|
[heading Constraints]
|
||
|
|
* none
|
||
|
|
|
||
|
|
[heading Behavior]
|
||
|
|
* `is_const_member<T>::value` is `true` when either:
|
||
|
|
* `T` is a function type with a `const` member qualifier
|
||
|
|
* `T` is a pointer to a member function with a `const` member qualifier
|
||
|
|
* `T` is a function object with a non-overloaded `operator()`, where the `operator()` has a `const` member qualifier
|
||
|
|
* On compilers that support variable templates, `is_const_member_v<T>` is equivalent to `is_const_member<T>::value`.
|
||
|
|
|
||
|
|
[heading Input/Output Examples]
|
||
|
|
[table
|
||
|
|
[[`T`] [`is_const_member_v<T>`]]
|
||
|
|
[[`int() const`] [`true`]]
|
||
|
|
[[`int() const volatile`] [`true`]]
|
||
|
|
[[`int() const & transaction_safe`] [`true`]]
|
||
|
|
[[`int() const &&`] [`true`]]
|
||
|
|
[[`int(foo::*&)() const`] [`true`]]
|
||
|
|
[[`int(foo::*)() const volatile`] [`true`]]
|
||
|
|
[[`int(foo::*)() const volatile &&`][`true`]]
|
||
|
|
[[`int(foo::* const)() const`] [`true`]]
|
||
|
|
[[`int()`] [`false`]]
|
||
|
|
[[`int() volatile`] [`false`]]
|
||
|
|
[[`int() &&`] [`false`]]
|
||
|
|
[[`int(*)()`] [`false`]]
|
||
|
|
[[`int`] [`false`]]
|
||
|
|
[[`int foo::*`] [`false`]]
|
||
|
|
[[`const int foo::*`] [`false`]]
|
||
|
|
]
|
||
|
|
|
||
|
|
[heading Example Program]
|
||
|
|
[import ../example/is_const_member.cpp]
|
||
|
|
[is_const_member]
|
||
|
|
[endsect]
|
||
|
|
*/
|
||
|
|
//]
|
||
|
|
|
||
|
|
#endif // #ifndef BOOST_CLBL_TRTS_IS_CONST_MEMBER_HPP
|