Atmosphere/stratosphere/libstratosphere/include/boost/callable_traits/is_noexcept.hpp

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2.7 KiB
C++

/*
@file is_noexcept
@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_NOEXCEPT_HPP
#define BOOST_CLBL_TRTS_IS_NOEXCEPT_HPP
#include <boost/callable_traits/detail/core.hpp>
namespace boost { namespace callable_traits {
//[ is_noexcept_hpp
/*`[section:ref_is_noexcept is_noexcept]
[heading Header]
``#include <boost/callable_traits/is_noexcept.hpp>``
[heading Definition]
*/
// inherits from either std::true_type or std::false_type
template<typename T>
struct is_noexcept;
//<-
template<typename T>
struct is_noexcept : detail::traits<detail::shallow_decay<T>>::is_noexcept {
using type = typename detail::traits<
detail::shallow_decay<T>>::is_noexcept;
};
#ifdef BOOST_CLBL_TRTS_DISABLE_VARIABLE_TEMPLATES
template<typename T>
struct is_noexcept_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_noexcept_v = //see below
//<-
detail::traits<detail::shallow_decay<T>>::is_noexcept::value;
#endif
}} // namespace boost::callable_traits
//->
/*`
[heading Constraints]
* none
*
[heading Behavior]
* `is_noexcept<T>::value` is `true` when either:
* `T` is a function type, function pointer type, function reference type, or member function pointer type where the function has a `noexcept` specifier
* `T` is a function object with a non-overloaded `operator()`, where the `operator()` has a `noexcept` specifier
* On compilers that support variable templates, `is_noexcept_v<T>` is equivalent to `is_noexcept<T>::value`.
[heading Input/Output Examples]
[table
[[`T`] [`is_noexcept_v<T>`]]
[[`int() const noexcept`] [`true`]]
[[`int(* const &)() noexcept`] [`true`]]
[[`int(&)() noexcept`] [`true`]]
[[`int(foo::*)() noexcept`] [`true`]]
[[`int() const`] [`false`]]
[[`int() volatile`] [`false`]]
[[`int(foo::*)() const`] [`false`]]
[[`int() const`] [`false`]]
[[`int() volatile`] [`false`]]
[[`int() &`] [`false`]]
[[`int(*)()`] [`false`]]
[[`int`] [`false`]]
[[`int foo::*`] [`false`]]
[[`const int foo::*`] [`false`]]
]
[heading Example Program]
[import ../example/is_noexcept.cpp]
[is_noexcept]
[endsect]
*/
//]
#endif // #ifndef BOOST_CLBL_TRTS_IS_NOEXCEPT_HPP