1 // Copyright (C) 2020-2021 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-options "-std=gnu++2a" }
19 // { dg-do compile { target c++2a } }
20 
21 #include <iterator>
22 #include <ranges>
23 
24 // Verify we optimize away the 'end' data member of a subrange with an empty
25 // sentinel type.
26 static_assert(sizeof(std::ranges::subrange<std::counted_iterator<int*>,
27 					   std::default_sentinel_t>)
28 	      == sizeof(std::counted_iterator<int*>));
29