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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/23_containers/array/tuple_interface/tuple_size.cc
1 // { dg-do compile { target c++11 } }
3 // Copyright (C) 2011-2024 Free Software Foundation, Inc.
5 // This file is part of the GNU ISO C++ Library. This library is free
6 // software; you can redistribute it and/or modify it under the
7 // terms of the GNU General Public License as published by the
8 // Free Software Foundation; either version 3, or (at your option)
11 // This library is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License along
17 // with this library; see the file COPYING3. If not see
18 // <http://www.gnu.org/licenses/>.
20 // NB: Don't include any other headers in this file.
21 // LWG 2212 requires <array> to define tuple_size<cv T> specializations.
28 using std::tuple_size
;
30 // This relies on the fact that <utility> includes <type_traits>:
35 typedef array
<int, len
> array_type
;
36 static_assert(tuple_size
<array_type
>::value
== 5, "");
37 static_assert(tuple_size
<const array_type
>::value
== 5, "");
38 static_assert(tuple_size
<volatile array_type
>::value
== 5, "");
39 static_assert(tuple_size
<const volatile array_type
>::value
== 5, "");
44 typedef array
<float, len
> array_type
;
45 static_assert(tuple_size
<array_type
>::value
== 0, "");
46 static_assert(tuple_size
<const array_type
>::value
== 0, "");
47 static_assert(tuple_size
<volatile array_type
>::value
== 0, "");
48 static_assert(tuple_size
<const volatile array_type
>::value
== 0, "");