1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <iterator>
10 
11 // front_insert_iterator
12 
13 // front_insert_iterator<Cont> operator++(int);
14 
15 #include <cassert>
16 #include <iterator>
17 #include <list>
18 
19 #include "test_macros.h"
20 #include "nasty_containers.h"
21 #include "test_constexpr_container.h"
22 
23 template <class C>
24 TEST_CONSTEXPR_CXX20 bool
test(C c)25 test(C c)
26 {
27     std::front_insert_iterator<C> i(c);
28     std::front_insert_iterator<C> r = i++;
29     r = 0;
30     assert(c.size() == 1);
31     assert(c.back() == 0);
32     return true;
33 }
34 
main(int,char **)35 int main(int, char**)
36 {
37     test(std::list<int>());
38     test(nasty_list<int>());
39 #if TEST_STD_VER >= 20
40     test(ConstexprFixedCapacityDeque<int, 10>());
41     static_assert(test(ConstexprFixedCapacityDeque<int, 10>()));
42 #endif
43     return 0;
44 }
45