34d4f0c136
We've built up quite a few links directly to github within the code base. We should instead use `llvm.org/PR<issue-number>` to link to bugs, since that is resilient to the bug tracker changing in the future. This is especially relevant for tests linking to bugs, since they will probably be there for decades to come. A nice side effect is that these links are significantly shorter than the GH links, making them much less of an eyesore. This patch also replaces a few links that linked to the old bugzilla instance on llvm.org.
89 lines
2.1 KiB
C++
89 lines
2.1 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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// <string>
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// void shrink_to_fit(); // constexpr since C++20
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#include <cassert>
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#include <string>
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#include "asan_testing.h"
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#include "increasing_allocator.h"
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#include "min_allocator.h"
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#include "test_macros.h"
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template <class S>
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TEST_CONSTEXPR_CXX20 void test(S& s) {
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typename S::size_type old_cap = s.capacity();
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S s0 = s;
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s.shrink_to_fit();
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LIBCPP_ASSERT(s.__invariants());
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assert(s == s0);
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assert(s.capacity() <= old_cap);
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assert(s.capacity() >= s.size());
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LIBCPP_ASSERT(is_string_asan_correct(s));
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}
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template <class S>
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TEST_CONSTEXPR_CXX20 void test_string() {
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S s;
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test(s);
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s.assign(10, 'a');
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s.erase(5);
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test(s);
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s.assign(50, 'a');
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s.erase(5);
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test(s);
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s.assign(100, 'a');
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s.erase(50);
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test(s);
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s.assign(100, 'a');
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for (int i = 0; i <= 9; ++i) {
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s.erase(90 - 10 * i);
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test(s);
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}
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}
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TEST_CONSTEXPR_CXX20 bool test() {
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test_string<std::string>();
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#if TEST_STD_VER >= 11
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test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char>>>();
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test_string<std::basic_string<char, std::char_traits<char>, safe_allocator<char>>>();
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#endif
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#if TEST_STD_VER >= 23
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{ // Make sure shrink_to_fit never increases capacity
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// See: https://llvm.org/PR95161
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std::basic_string<char, std::char_traits<char>, increasing_allocator<char>> s{
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"String does not fit in the internal buffer"};
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std::size_t capacity = s.capacity();
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std::size_t size = s.size();
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s.shrink_to_fit();
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assert(s.capacity() <= capacity);
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assert(s.size() == size);
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LIBCPP_ASSERT(is_string_asan_correct(s));
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}
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#endif
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return true;
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}
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int main(int, char**) {
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test();
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#if TEST_STD_VER > 17
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static_assert(test());
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#endif
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return 0;
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}
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