| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17, c++20 |
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| 10 | |
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| 11 | // template<container-compatible-range<T> R> |
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| 12 | // constexpr void prepend_range(R&& rg); // C++23; constexpr since C++26 |
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| 13 | |
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| 14 | #include <forward_list> |
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| 15 | |
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| 16 | #include "../../insert_range_sequence_containers.h" |
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| 17 | #include "test_macros.h" |
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| 18 | |
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| 19 | // Tested cases: |
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| 20 | // - different kinds of insertions (prepending an {empty/one-element/mid-sized/long range} into an |
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| 21 | // {empty/one-element/full} container); |
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| 22 | // - prepending move-only elements; |
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| 23 | // - an exception is thrown when copying the elements or when allocating new elements. |
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| 24 | TEST_CONSTEXPR_CXX26 bool test() { |
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| 25 | static_assert(test_constraints_assign_range<std::forward_list, int, double>()); |
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| 26 | |
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| 27 | for_all_iterators_and_allocators<int, const int*>([]<class Iter, class Sent, class Alloc>() { |
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| 28 | test_sequence_prepend_range<std::forward_list<int, Alloc>, Iter, Sent>([](auto&&) { |
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| 29 | // No additional validation to do. |
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| 30 | }); |
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| 31 | }); |
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| 32 | test_sequence_prepend_range_move_only<std::forward_list>(); |
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| 33 | |
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| 34 | if (!TEST_IS_CONSTANT_EVALUATED) { |
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| 35 | test_prepend_range_exception_safety_throwing_copy<std::forward_list>(); |
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| 36 | test_prepend_range_exception_safety_throwing_allocator<std::forward_list, int>(); |
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| 37 | } |
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| 38 | |
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| 39 | return true; |
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| 40 | } |
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| 41 | |
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| 42 | int main(int, char**) { |
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| 43 | assert(test()); |
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| 44 | #if TEST_STD_VER >= 26 |
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| 45 | static_assert(test()); |
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| 46 | #endif |
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| 47 | |
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| 48 | return 0; |
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| 49 | } |
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| 50 | |
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