ceph/src/boost/libs/type_traits/doc/add_reference.qbk

   1 [/
   2   Copyright 2007 John Maddock.
   3   Distributed under the Boost Software License, Version 1.0.
   4   (See accompanying file LICENSE_1_0.txt or copy at
   5   http://www.boost.org/LICENSE_1_0.txt).
   6 ]
   7
   8 [section:add_reference add_reference]
   9
  10 [note This trait has been made obsolete by __add_lvalue_reference and __add_rvalue_reference,
  11 and new code should use these new traits rather than __is_reference which is retained
  12 for backwards compatibility only.
  13 ]
  14
  15
  16    template <class T>
  17    struct add_reference
  18    {
  19       typedef __below type;
  20    };
  21
  22 __type If `T` is not a reference type then `T&`, otherwise `T`.
  23
  24 __std_ref 8.3.2.
  25
  26 __header ` #include <boost/type_traits/add_reference.hpp>` or ` #include <boost/type_traits.hpp>`
  27
  28 [table Examples
  29
  30 [ [Expression] [Result Type]]
  31
  32 [[`add_reference<int>::type`][`int&`]]
  33
  34 [[`add_reference<int const&>::type`] [`int const&`]]
  35
  36 [[`add_reference<int*>::type`] [`int*&`]]
  37
  38 [[`add_reference<int*&>::type`] [`int*&`]]
  39
  40 ]
  41
  42 [all_compilers]
  43
  44 [endsect]
  45