628fcfd520
Reviewed By: ldionne, var-const, #libc, nilayvaish Spies: nilayvaish, libcxx-commits Differential Revision: https://reviews.llvm.org/D123129
64 lines
1.7 KiB
C++
64 lines
1.7 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
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// <string>
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// ~basic_string() // implied noexcept;
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#include <string>
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#include <cassert>
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#include "test_macros.h"
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#include "test_allocator.h"
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template <class T>
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struct throwing_alloc
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{
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typedef T value_type;
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throwing_alloc(const throwing_alloc&);
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T *allocate(size_t);
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~throwing_alloc() noexcept(false);
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};
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// Test that it's possible to take the address of basic_string's destructors
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// by creating globals which will register their destructors with cxa_atexit.
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std::string s;
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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std::wstring ws;
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#endif
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static_assert(std::is_nothrow_destructible<std::string>::value, "");
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static_assert(std::is_nothrow_destructible<
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std::basic_string<char, std::char_traits<char>, test_allocator<char>>>::value, "");
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LIBCPP_STATIC_ASSERT(!std::is_nothrow_destructible<
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std::basic_string<char, std::char_traits<char>, throwing_alloc<char>>>::value, "");
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bool test() {
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test_allocator_statistics alloc_stats;
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{
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std::basic_string<char, std::char_traits<char>, test_allocator<char>> str2((test_allocator<char>(&alloc_stats)));
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str2 = "long long string so no SSO";
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assert(alloc_stats.alloc_count == 1);
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}
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assert(alloc_stats.alloc_count == 0);
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return true;
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}
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int main(int, char**)
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{
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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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