File: decay.qbk

package info (click to toggle)
boost1.88 1.88.0-1
  • links: PTS, VCS
  • area: main
  • in suites: trixie
  • size: 576,932 kB
  • sloc: cpp: 4,149,234; xml: 136,789; ansic: 35,092; python: 33,910; asm: 5,698; sh: 4,604; ada: 1,681; makefile: 1,633; pascal: 1,139; perl: 1,124; sql: 640; yacc: 478; ruby: 271; java: 77; lisp: 24; csh: 6
file content (44 lines) | stat: -rw-r--r-- 1,020 bytes parent folder | download | duplicates (8)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
[/ 
  Copyright 2007 John Maddock.
  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).
]

[section:decay decay]

   template <class T>
   struct decay
   {
      typedef __below type;
   };
   
   template <class T> using decay_t = typename decay<T>::type; // C++11 and above

__type Let `U` be the result of `remove_reference<T>::type`, then if `U` is
an array type, the result is `remove_extent<U>::type*`, otherwise if `U` is a 
function type then the result is `U*`, otherwise the result is `remove_cv<U>::type`.

__std_ref 3.9.1.

__header ` #include <boost/type_traits/decay.hpp>` or ` #include <boost/type_traits.hpp>`

[table Examples

[ [Expression] [Result Type]]

[[`decay<int[2][3]>::type`][`int[3]*`]]

[[`decay<int(&)[2]>::type`] [`int*`]]

[[`decay<int(&)(double)>::type`] [`int(*)(double)`]]

[[`int(*)(double)`] [`int(*)(double)`]]
[[`int(double)`] [`int(*)(double)`]]

]

[all_compilers]

[endsect]