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

   1 [/
   2   Copyright 2010 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_lvalue_reference add_lvalue_reference]
   9
  10    template <class T>
  11    struct add_lvalue_reference
  12    {
  13       typedef __below type;
  14    };
  15
  16 __type If `T` names an object or function type then the member typedef `type`
  17 shall name `T&`; otherwise, if `T` names a type ['rvalue reference to U] then
  18 the member typedef type shall name `U&`; otherwise, type shall name `T`.
  19
  20 __std_ref 20.7.6.2.
  21
  22 __header ` #include <boost/type_traits/add_lvalue_reference.hpp>` or ` #include <boost/type_traits.hpp>`
  23
  24 [table Examples
  25
  26 [ [Expression] [Result Type]]
  27
  28 [[`add_lvalue_reference<int>::type`][`int&`]]
  29
  30 [[`add_lvalue_reference<int const&>::type`] [`int const&`]]
  31
  32 [[`add_lvalue_reference<int*>::type`] [`int*&`]]
  33
  34 [[`add_lvalue_reference<int*&>::type`] [`int*&`]]
  35
  36 [[`add_lvalue_reference<int&&>::type`][`int&`]]
  37
  38 [[`add_lvalue_reference<void>::type`][`void`]]
  39
  40 ]
  41
  42 [all_compilers]
  43
  44 [endsect]
  45