2d66ab5e8e
We've been improving these the tests for vector quite a bit and we are probably not done improving our container tests. Formatting everything at once will make subsequent reviews easier.
89 lines
3.0 KiB
C++
89 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
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// ADDITIONAL_COMPILE_FLAGS(has-fconstexpr-steps): -fconstexpr-steps=2000000
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// template<container-compatible-range<bool> R>
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// constexpr void assign_range(R&& rg); // C++23
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#include <sstream>
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#include <vector>
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#include "../insert_range_sequence_containers.h"
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#include "test_macros.h"
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// Tested cases:
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// - different kinds of assignments (assigning an {empty/one-element/mid-sized/long range} to an
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// {empty/one-element/full} container);
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// - an exception is thrown when allocating new elements.
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constexpr bool test() {
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static_assert(test_constraints_assign_range<std::vector, bool, char>());
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for_all_iterators_and_allocators<bool, const int*>([]<class Iter, class Sent, class Alloc>() {
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test_sequence_assign_range<std::vector<bool, Alloc>, Iter, Sent>([]([[maybe_unused]] auto&& c) {
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LIBCPP_ASSERT(c.__invariants());
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// `is_contiguous_container_asan_correct` doesn't work on `vector<bool>`.
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});
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});
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{ // Vector may or may not need to reallocate because of the assignment -- make sure to test both cases.
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{ // Ensure reallocation happens. Note that `vector<bool>` typically reserves a lot of capacity.
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constexpr int N = 255;
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bool in[N] = {};
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std::vector<bool> v = {0, 0, 0, 1, 1, 0, 0, 0};
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assert(v.capacity() < v.size() + std::ranges::size(in));
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v.assign_range(in);
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assert(std::ranges::equal(v, in));
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}
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{ // Ensure no reallocation happens.
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bool in[] = {1, 1, 0, 1, 1};
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std::vector<bool> v = {0, 0, 0, 1, 1, 0, 0, 0};
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v.assign_range(in);
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assert(std::ranges::equal(v, in));
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}
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{ // Ensure input-only sized ranges are accepted.
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using input_iter = cpp20_input_iterator<const bool*>;
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const bool in[]{true, true, false, true};
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std::vector<bool> v;
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v.assign_range(std::views::counted(input_iter{std::ranges::begin(in)}, std::ranges::ssize(in)));
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assert(std::ranges::equal(v, std::vector<bool>{true, true, false, true}));
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}
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}
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return true;
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}
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#ifndef TEST_HAS_NO_LOCALIZATION
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void test_counted_istream_view() {
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std::istringstream is{"1 1 0 1"};
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auto vals = std::views::istream<bool>(is);
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std::vector<bool> v;
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v.assign_range(std::views::counted(vals.begin(), 3));
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assert(v == (std::vector{true, true, false}));
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}
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#endif
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int main(int, char**) {
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test();
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static_assert(test());
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// Note: `test_assign_range_exception_safety_throwing_copy` doesn't apply because copying booleans cannot throw.
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test_assign_range_exception_safety_throwing_allocator<std::vector, bool>();
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#ifndef TEST_HAS_NO_LOCALIZATION
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test_counted_istream_view();
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#endif
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return 0;
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}
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