| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
| // ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=2000000 |
| |
| // template<container-compatible-range<bool> R> |
| // constexpr void assign_range(R&& rg); // C++23 |
| |
| #include <vector> |
| |
| #include "../insert_range_sequence_containers.h" |
| #include "test_macros.h" |
| |
| // Tested cases: |
| // - different kinds of assignments (assigning an {empty/one-element/mid-sized/long range} to an |
| // {empty/one-element/full} container); |
| // - an exception is thrown when allocating new elements. |
| constexpr bool test() { |
| static_assert(test_constraints_assign_range<std::vector, bool, char>()); |
| |
| for_all_iterators_and_allocators<bool, const int*>([]<class Iter, class Sent, class Alloc>() { |
| test_sequence_assign_range<std::vector<bool, Alloc>, Iter, Sent>([]([[maybe_unused]] auto&& c) { |
| LIBCPP_ASSERT(c.__invariants()); |
| // `is_contiguous_container_asan_correct` doesn't work on `vector<bool>`. |
| }); |
| }); |
| |
| { // Vector may or may not need to reallocate because of the assignment -- make sure to test both cases. |
| { // Ensure reallocation happens. Note that `vector<bool>` typically reserves a lot of capacity. |
| constexpr int N = 255; |
| bool in[N] = {}; |
| std::vector<bool> v = {0, 0, 0, 1, 1, 0, 0, 0}; |
| assert(v.capacity() < v.size() + std::ranges::size(in)); |
| |
| v.assign_range(in); |
| assert(std::ranges::equal(v, in)); |
| } |
| |
| { // Ensure no reallocation happens. |
| bool in[] = {1, 1, 0, 1, 1}; |
| std::vector<bool> v = {0, 0, 0, 1, 1, 0, 0, 0}; |
| |
| v.assign_range(in); |
| assert(std::ranges::equal(v, in)); |
| } |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| // Note: `test_assign_range_exception_safety_throwing_copy` doesn't apply because copying booleans cannot throw. |
| test_assign_range_exception_safety_throwing_allocator<std::vector, bool>(); |
| |
| return 0; |
| } |