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 // UNSUPPORTED: c++03
10
11 // <vector>
12
13 // template <class... Args> iterator emplace(const_iterator pos, Args&&... args);
14
15 #include <vector>
16 #include <cassert>
17
18 #include "test_macros.h"
19 #include "min_allocator.h"
20 #include "asan_testing.h"
21
tests()22 TEST_CONSTEXPR_CXX20 bool tests() {
23 {
24 std::vector<int> v;
25 v.reserve(3);
26 assert(is_contiguous_container_asan_correct(v));
27 v = { 1, 2, 3 };
28 v.emplace(v.begin(), v.back());
29 assert(v[0] == 3);
30 assert(is_contiguous_container_asan_correct(v));
31 }
32 {
33 std::vector<int> v;
34 v.reserve(4);
35 assert(is_contiguous_container_asan_correct(v));
36 v = { 1, 2, 3 };
37 v.emplace(v.begin(), v.back());
38 assert(v[0] == 3);
39 assert(is_contiguous_container_asan_correct(v));
40 }
41 {
42 std::vector<int, min_allocator<int>> v;
43 v.reserve(3);
44 assert(is_contiguous_container_asan_correct(v));
45 v = { 1, 2, 3 };
46 v.emplace(v.begin(), v.back());
47 assert(v[0] == 3);
48 assert(is_contiguous_container_asan_correct(v));
49 }
50 {
51 std::vector<int, min_allocator<int>> v;
52 v.reserve(4);
53 assert(is_contiguous_container_asan_correct(v));
54 v = { 1, 2, 3 };
55 v.emplace(v.begin(), v.back());
56 assert(v[0] == 3);
57 assert(is_contiguous_container_asan_correct(v));
58 }
59 {
60 std::vector<int> v;
61 v.reserve(8);
62 size_t old_capacity = v.capacity();
63 assert(old_capacity >= 8);
64
65 v.resize(4); // keep the existing capacity
66 assert(v.capacity() == old_capacity);
67
68 v.emplace(v.cend(), 42);
69 assert(v.size() == 5);
70 assert(v.capacity() == old_capacity);
71 assert(v[4] == 42);
72 }
73
74 return true;
75 }
76
main(int,char **)77 int main(int, char**) {
78 tests();
79 #if TEST_STD_VER > 17
80 static_assert(tests());
81 #endif
82 return 0;
83 }
84