ceph/src/boost/libs/type_traits/doc/make_unsigned.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:make_unsigned make_unsigned]
   9
  10    template <class T>
  11    struct make_unsigned
  12    {
  13       typedef __below type;
  14    };
  15
  16 __type If T is a unsigned integer type then the same type as T, if T is an
  17 signed integer type then the corresponding unsigned type.
  18 Otherwise if T is an enumerated or
  19 character type (char or wchar_t) then an unsigned integer type with the same
  20 width as T.
  21
  22 If T has any cv-qualifiers then these are also present on the result type.
  23
  24 [*Requires:]  T must be an integer or enumerated type, and must not be the type
  25 bool.
  26
  27 __std_ref 3.9.1.
  28
  29 [all_compilers]
  30
  31 __header ` #include <boost/type_traits/make_unsigned.hpp>` or ` #include <boost/type_traits.hpp>`
  32
  33 [table Examples
  34
  35 [ [Expression] [Result Type]]
  36
  37 [[`make_unsigned<int>::type`][`unsigned int`]]
  38
  39 [[`make_unsigned<unsigned int const>::type`] [`unsigned int const`]]
  40
  41 [[`make_unsigned<const unsigned long long>::type`] [`const unsigned long long`]]
  42
  43 [[`make_unsigned<my_enum>::type`] [An unsigned integer type with the same width as the enum.]]
  44 [[`make_unsigned<wchar_t>::type`] [An unsigned integer type with the same width as wchar_t.]]
  45
  46 ]
  47
  48 [endsect]
  49