Boost C++ Libraries

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copy_reference_
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copy_reference_ 

template<class T, class U>
struct copy_reference
{
    typedef see-below type;
};

template<class T, class U>
using copy_reference_t = typename copy_reference<T, U>::type;

type: T ref, where ref are the ref-qualifiers of U.

Header: #include <boost/type_traits/copy_reference.hpp> or #include <boost/type_traits.hpp>>

Table 1.19. Examples

Expression

Result Type

copy_reference<int, char>::type

int

copy_reference<int, char&>::type

int&

copy_reference<int, char&&>::type

int&&

copy_reference<int&, char>::type

int&

copy_reference<int&, char&>::type

int&

copy_reference<int&, char&&>::type

int&

copy_reference<int&&, char>::type

int&&

copy_reference<int&&, char&>::type

int&

copy_reference<int&&, char&&>::type

int&&


Compiler Compatibility: All current compilers are supported by this trait. The type alias copy_reference_t is only available if the compiler supports template aliases.

Copyright © 2000, 2011 Adobe Systems Inc, David Abrahams, Frederic Bron, Steve Cleary, Beman Dawes, Glen Fernandes, Aleksey Gurtovoy, Howard Hinnant, Jesse Jones, Mat Marcus, Itay Maman, John Maddock, Alexander Nasonov, Thorsten Ottosen, Roman Perepelitsa, Robert Ramey, Jeremy Siek, Robert Stewart and Steven Watanabe

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)

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