1 // Copyright (C) 2015-2021 Free Software Foundation, Inc.
2 //
3 // This file is part of the GNU ISO C++ Library.  This library is free
4 // software; you can redistribute it and/or modify it under the
5 // terms of the GNU General Public License as published by the
6 // Free Software Foundation; either version 3, or (at your option)
7 // any later version.
8 
9 // This library is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12 // GNU General Public License for more details.
13 
14 // You should have received a copy of the GNU General Public License along
15 // with this library; see the file COPYING3.  If not see
16 // <http://www.gnu.org/licenses/>.
17 
18 // { dg-do compile { target c++11 } }
19 
20 #include <tuple>
21 
22 class Empty { };
23 
24 using std::tuple;
25 using char_pair = tuple<char, char>;
26 
27 static_assert( sizeof(tuple<Empty, char_pair>) == sizeof(char_pair),
28                "Nested tuple tuple<Empty, tuple<T,T>> is too big");
29 
30 static_assert( sizeof(tuple<char_pair, char_pair>) == (2 * sizeof(char_pair)),
31                "Nested tuple<tuple<T,T, tuple<T,T>> is too big" );
32