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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <string>
// basic_string() noexcept(is_nothrow_default_constructible<allocator_type>::value); // constexpr since C++20
#include <cassert>
#include <string>
#include "test_macros.h"
#include "test_allocator.h"
#if TEST_STD_VER >= 11
// Test the noexcept specification, which is a conforming extension
LIBCPP_STATIC_ASSERT(std::is_nothrow_default_constructible<std::string>::value, "");
LIBCPP_STATIC_ASSERT(std::is_nothrow_default_constructible<
std::basic_string<char, std::char_traits<char>, test_allocator<char>>>::value, "");
LIBCPP_STATIC_ASSERT(!std::is_nothrow_default_constructible<
std::basic_string<char, std::char_traits<char>, limited_allocator<char, 10>>>::value, "");
#endif
TEST_CONSTEXPR_CXX20 bool test() {
std::string str;
assert(str.empty());
return true;
}
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
static_assert(test());
#endif
return 0;
}
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