ceph/src/boost/libs/type_traits/doc/floating_point_promotion.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:floating_point_promotion floating_point_promotion]
   9
  10    template <class T>
  11    struct floating_point_promotion
  12    {
  13       typedef __below type;
  14    };
  15
  16 __type If floating point promotion can be applied to an rvalue of type `T`,
  17 then applies floating point promotion to `T` and keeps cv-qualifiers of `T`,
  18 otherwise leaves `T` unchanged.
  19
  20 __std_ref 4.6.
  21
  22 __header ` #include <boost/type_traits/floating_point_promotion.hpp>` or ` #include <boost/type_traits.hpp>`
  23
  24 [table Examples
  25
  26 [ [Expression] [Result Type]]
  27
  28 [[`floating_point_promotion<float const>::type`][`double const`]]
  29
  30 [[`floating_point_promotion<float&>::type`][`float&`]]
  31
  32 [[`floating_point_promotion<short>::type`][`short`]]
  33
  34 ]
  35
  36 [all_compilers]
  37
  38 [endsect]
  39