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

90 lines
2.5 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_ADD_VARARGS_HPP
#define BOOST_CLBL_TRTS_ADD_VARARGS_HPP
#include <boost/callable_traits/detail/core.hpp>
namespace boost { namespace callable_traits {
//[ add_varargs_hpp
/*`
[section:ref_add_varargs add_varargs]
[heading Header]
``#include <boost/callable_traits/add_varargs.hpp>``
[heading Definition]
*/
template<typename T>
using add_varargs_t = //see below
//<-
detail::try_but_fail_if_invalid<
typename detail::traits<T>::add_varargs,
varargs_are_illegal_for_this_type>;
namespace detail {
template<typename T, typename = std::false_type>
struct add_varargs_impl {};
template<typename T>
struct add_varargs_impl <T, typename std::is_same<
add_varargs_t<T>, detail::dummy>::type>
{
using type = add_varargs_t<T>;
};
}
//->
template<typename T>
struct add_varargs : detail::add_varargs_impl<T> {};
//<-
}} // namespace boost::callable_traits
//->
/*`
[heading Constraints]
* `T` must be one of the following:
* function type
* function pointer type
* function reference type
* member function pointer type
* If `T` is a pointer, it may not be cv/ref qualified
[heading Behavior]
* A substitution failure occurs if the constraints are violated.
* Adds C-style variadics (`...`) to the signature of `T`, if not already present.
[heading Input/Output Examples]
[table
[[`T`] [`add_varargs_t<T>`]]
[[`int()`] [`int(...)`]]
[[`int(int)`] [`int(int, ...)`]]
[[`int (&)()`] [`int(&)(...)`]]
[[`int (*)()`] [`int(*)(...)`]]
[[`int (*)(...)`] [`int(*)(...)`]]
[[`int(foo::*)()`] [`int(foo::*)(...)`]]
[[`int(foo::*)() &`] [`int(foo::*)(...) &`]]
[[`int(foo::*)() &&`] [`int(foo::*)(...) &&`]]
[[`int(foo::*)() const`] [`int(foo::*)(...) const`]]
[[`int(foo::*)() transaction_safe`] [`int(foo::*)(...) transaction_safe`]]
[[`int`] [(substitution failure)]]
[[`int foo::*`] [(substitution failure)]]
[[`int (*&)()`] [(substitution failure)]]
]
[heading Example Program]
[import ../example/add_varargs.cpp]
[add_varargs]
[endsect]
*/
//]
#endif