1 // Copyright (C) 2018-2020 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 run { target c++2a } }
20
21 #include <list>
22 #include <testsuite_hooks.h>
23
24 using test_type = std::list<int>;
25
26 void
test01()27 test01()
28 {
29 test_type x{1, 2, 2, 4, 4, 2, 1};
30 static_assert(std::is_same_v<decltype(x.unique()), test_type::size_type>);
31 test_type::size_type r = x.unique();
32 VERIFY( r == 2 );
33 r = x.unique();
34 VERIFY( r == 0 );
35 }
36
37 void
test02()38 test02()
39 {
40 auto pred = [](int val, int prev) { return val == prev; };
41 test_type x{1, 2, 2, 4, 4, 2, 1};
42 static_assert(std::is_same_v<decltype(x.unique(pred)),
43 test_type::size_type>);
44 test_type::size_type r = x.unique(pred);
45 VERIFY( r == 2 );
46 r = x.unique(pred);
47 VERIFY( r == 0 );
48 }
49
50 int
main()51 main()
52 {
53 test01();
54 test02();
55 }
56