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 // explicit front_insert_iterator(Cont& x); // constexpr in C++20
14 
15 #include <iterator>
16 #include <list>
17 
18 #include "test_macros.h"
19 #include "nasty_containers.h"
20 #include "test_constexpr_container.h"
21 
22 template <class C>
23 TEST_CONSTEXPR_CXX20 bool
test(C c)24 test(C c)
25 {
26     std::front_insert_iterator<C> i(c);
27     return true;
28 }
29 
main(int,char **)30 int main(int, char**)
31 {
32     test(std::list<int>());
33     test(nasty_list<int>());
34 #if TEST_STD_VER >= 20
35     test(ConstexprFixedCapacityDeque<int, 10>());
36     static_assert(test(ConstexprFixedCapacityDeque<int, 10>()));
37 #endif
38     return 0;
39 }
40