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// template <FrontInsertionContainer Cont>
12// front_insert_iterator<Cont>
13// front_inserter(Cont& x); // constexpr in C++20
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
23template <class C>
24TEST_CONSTEXPR_CXX20 bool
25test(C c)
26{
27 std::front_insert_iterator<C> i = std::front_inserter(c);
28 i = 3;
29 assert(c.size() == 1);
30 assert(c.front() == 3);
31 i = 4;
32 assert(c.size() == 2);
33 assert(c.front() == 4);
34 return true;
35}
36
37int main(int, char**)
38{
39 test(std::list<int>());
40 test(nasty_list<int>());
41#if TEST_STD_VER >= 20
42 test(ConstexprFixedCapacityDeque<int, 10>());
43 static_assert(test(ConstexprFixedCapacityDeque<int, 10>()));
44#endif
45 return 0;
46}
47

source code of libcxx/test/std/iterators/predef.iterators/insert.iterators/front.insert.iter.ops/front.inserter/test.pass.cpp