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git.ipfire.org Git - thirdparty/gcc.git/blob - libstdc++-v3/testsuite/20_util/tuple/53648.cc
1 // { dg-do compile { target c++11 } }
3 // Copyright (C) 2012-2020 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/>.
23 #include <type_traits>
29 template class std::tuple
<tuple
<>>;
30 template class std::tuple
<tuple
<tuple
<>>>;
31 template class std::tuple
<A
, tuple
<A
, tuple
<A
, tuple
<A
>>>>;
32 template class std::tuple
<tuple
<tuple
<A
, A
>, A
>, A
>;
34 // Verify the following QoI properties are preserved
36 static_assert( std::is_empty
<tuple
<>>::value
, "tuple<> is empty" );
38 static_assert( std::is_empty
<tuple
<tuple
<>>>::value
,
39 "tuple<tuple<>> is empty" );
41 static_assert( sizeof(tuple
<char, tuple
<>>) == sizeof(char),
42 "tuple<> is eligible for EBO" );