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- [/
- Copyright 2010 John Maddock.
- Distributed under the Boost Software License, Version 1.0.
- (See accompanying file LICENSE_1_0.txt or copy at
- http://www.boost.org/LICENSE_1_0.txt).
- ]
- [section:add_rvalue_reference add_rvalue_reference]
- template <class T>
- struct add_rvalue_reference
- {
- typedef __below type;
- };
-
- template <class T> using add_rvalue_reference_t = typename add_rvalue_reference<T>::type; // C++11 and above
- __type If `T` names an object or function type then the member typedef type
- shall name `T&&`; otherwise, type shall name `T`. ['\[Note: This rule reflects
- the semantics of reference collapsing. For example, when a type `T` names
- a type U&, the type `add_rvalue_reference<T>::type` is not an rvalue
- reference. -end note\]].
- __std_ref 20.7.6.2.
- __header ` #include <boost/type_traits/add_rvalue_reference.hpp>` or ` #include <boost/type_traits.hpp>`
- [table Examples
- [ [Expression] [Result Type]]
- [[`add_rvalue_reference<int>::type`][`int&&`]]
- [[`add_rvalue_reference<int const&>::type`] [`int const&`]]
- [[`add_rvalue_reference<int*>::type`] [`int*&&`]]
- [[`add_rvalue_reference<int*&>::type`] [`int*&`]]
- [[`add_rvalue_reference<int&&>::type`][`int&&`]]
- [[`add_rvalue_reference<void>::type`][`void`]]
- ]
- __compat In the absence of rvalue-reference support this trait has no effect.
- [endsect]
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