| //===----------------------------------------------------------------------===// |
| // |
| // 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<T> R> |
| // constexpr void assign_range(R&& rg); // C++23 |
| |
| #include <vector> |
| |
| #include "../../insert_range_sequence_containers.h" |
| #include "asan_testing.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); |
| // - assigning move-only elements; |
| // - an exception is thrown when copying the elements or when allocating new elements. |
| constexpr bool test() { |
| static_assert(test_constraints_assign_range<std::vector, int, double>()); |
| |
| for_all_iterators_and_allocators<int, const int*>([]<class Iter, class Sent, class Alloc>() { |
| test_sequence_assign_range<std::vector<int, Alloc>, Iter, Sent>([]([[maybe_unused]] auto&& c) { |
| LIBCPP_ASSERT(c.__invariants()); |
| LIBCPP_ASSERT(is_contiguous_container_asan_correct(c)); |
| }); |
| }); |
| test_sequence_assign_range_move_only<std::vector>(); |
| |
| { // Vector may or may not need to reallocate because of the assignment -- make sure to test both cases. |
| { // Ensure reallocation happens. |
| int in[] = {-1, -2, -3, -4, -5, -6, -7, -8, -9, -10}; |
| std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8}; |
| v.shrink_to_fit(); |
| assert(v.capacity() < v.size() + std::ranges::size(in)); |
| |
| v.assign_range(in); |
| assert(std::ranges::equal(v, in)); |
| } |
| |
| { // Ensure no reallocation happens -- the input range is shorter than the vector. |
| int in[] = {-1, -2, -3, -4, -5}; |
| std::vector<int> v = {1, 2, 3, 4, 5, 6, 7, 8}; |
| |
| v.assign_range(in); |
| assert(std::ranges::equal(v, in)); |
| } |
| |
| { // Ensure no reallocation happens -- the input range is longer than the vector but within capacity. |
| int in[] = {-1, -2, -3, -4, -5, -6, -7, -8}; |
| std::vector<int> v = {1, 2, 3, 4, 5}; |
| v.reserve(std::ranges::size(in)); |
| assert(v.capacity() >= std::ranges::size(in)); |
| |
| v.assign_range(in); |
| assert(std::ranges::equal(v, in)); |
| } |
| } |
| |
| return true; |
| } |
| |
| int main(int, char**) { |
| test(); |
| static_assert(test()); |
| |
| test_assign_range_exception_safety_throwing_copy<std::vector>(); |
| test_assign_range_exception_safety_throwing_allocator<std::vector, int>(); |
| |
| return 0; |
| } |