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, c++11, c++14, c++17, c++20
10
11// <flat_set>
12
13// pair<iterator, bool> insert(const value_type& v);
14
15#include <flat_set>
16#include <deque>
17#include <cassert>
18#include <functional>
19
20#include "MinSequenceContainer.h"
21#include "test_macros.h"
22#include "../helpers.h"
23#include "min_allocator.h"
24
25template <class KeyContainer>
26constexpr void test_one() {
27 using Key = typename KeyContainer::value_type;
28 using M = std::flat_set<Key, std::less<Key>, KeyContainer>;
29 using R = std::pair<typename M::iterator, bool>;
30 using VT = typename M::value_type;
31 M m;
32
33 const VT v1(2);
34 std::same_as<R> decltype(auto) r = m.insert(v1);
35 assert(r.second);
36 assert(r.first == m.begin());
37 assert(m.size() == 1);
38 assert(*r.first == 2);
39
40 const VT v2(1);
41 r = m.insert(v2);
42 assert(r.second);
43 assert(r.first == m.begin());
44 assert(m.size() == 2);
45 assert(*r.first == 1);
46
47 const VT v3(3);
48 r = m.insert(v3);
49 assert(r.second);
50 assert(r.first == std::ranges::prev(m.end()));
51 assert(m.size() == 3);
52 assert(*r.first == 3);
53
54 const VT v4(3);
55 r = m.insert(v4);
56 assert(!r.second);
57 assert(r.first == std::ranges::prev(m.end()));
58 assert(m.size() == 3);
59 assert(*r.first == 3);
60}
61
62constexpr bool test() {
63 test_one<std::vector<int>>();
64#ifndef __cpp_lib_constexpr_deque
65 if (!TEST_IS_CONSTANT_EVALUATED)
66#endif
67 test_one<std::deque<int>>();
68 test_one<MinSequenceContainer<int>>();
69 test_one<std::vector<int, min_allocator<int>>>();
70
71 return true;
72}
73
74void test_exception() {
75 auto insert_func = [](auto& m, auto key_arg) {
76 using value_type = typename std::decay_t<decltype(m)>::value_type;
77 const value_type p(key_arg);
78 m.insert(p);
79 };
80 test_emplace_exception_guarantee(emplace_function&: insert_func);
81}
82
83int main(int, char**) {
84 test();
85 test_exception();
86#if TEST_STD_VER >= 26
87 static_assert(test());
88#endif
89
90 return 0;
91}
92

source code of libcxx/test/std/containers/container.adaptors/flat.set/flat.set.modifiers/insert_cv.pass.cpp