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// ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=2000000
11
12// template<container-compatible-range<bool> R>
13// constexpr void assign_range(R&& rg); // C++23
14
15#include <vector>
16
17#include "../insert_range_sequence_containers.h"
18#include "test_macros.h"
19
20// Tested cases:
21// - different kinds of assignments (assigning an {empty/one-element/mid-sized/long range} to an
22// {empty/one-element/full} container);
23// - an exception is thrown when allocating new elements.
24constexpr bool test() {
25 static_assert(test_constraints_assign_range<std::vector, bool, char>());
26
27 for_all_iterators_and_allocators<bool, const int*>([]<class Iter, class Sent, class Alloc>() {
28 test_sequence_assign_range<std::vector<bool, Alloc>, Iter, Sent>([]([[maybe_unused]] auto&& c) {
29 LIBCPP_ASSERT(c.__invariants());
30 // `is_contiguous_container_asan_correct` doesn't work on `vector<bool>`.
31 });
32 });
33
34 { // Vector may or may not need to reallocate because of the assignment -- make sure to test both cases.
35 { // Ensure reallocation happens. Note that `vector<bool>` typically reserves a lot of capacity.
36 constexpr int N = 255;
37 bool in[N] = {};
38 std::vector<bool> v = {0, 0, 0, 1, 1, 0, 0, 0};
39 assert(v.capacity() < v.size() + std::ranges::size(in));
40
41 v.assign_range(in);
42 assert(std::ranges::equal(v, in));
43 }
44
45 { // Ensure no reallocation happens.
46 bool in[] = {1, 1, 0, 1, 1};
47 std::vector<bool> v = {0, 0, 0, 1, 1, 0, 0, 0};
48
49 v.assign_range(in);
50 assert(std::ranges::equal(v, in));
51 }
52 }
53
54 return true;
55}
56
57int main(int, char**) {
58 test();
59 static_assert(test());
60
61 // Note: `test_assign_range_exception_safety_throwing_copy` doesn't apply because copying booleans cannot throw.
62 test_assign_range_exception_safety_throwing_allocator<std::vector, bool>();
63
64 return 0;
65}
66

source code of libcxx/test/std/containers/sequences/vector.bool/assign_range.pass.cpp