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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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: no-exceptions
// After changing the alignment of the allocated pointer from 16 to 8, the exception
// thrown is no longer `bad_alloc` but instead length_error on systems using new
// headers but a dylib that doesn't contain 04ce0ba.
//
// XFAIL: using-built-library-before-llvm-19
// <string>
// size_type max_size() const; // constexpr since C++20
// NOTE: asan and msan will fail for one of two reasons
// 1. If allocator_may_return_null=0 then they will fail because the allocation
// returns null.
// 2. If allocator_may_return_null=1 then they will fail because the allocation
// is too large to succeed.
// UNSUPPORTED: sanitizer-new-delete
#include <string>
#include <cassert>
#include <new>
#include "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void test_resize_max_size_minus_1(const S& s) {
S s2(s);
const std::size_t sz = s2.max_size() - 1;
try {
s2.resize(sz, 'x');
} catch (const std::bad_alloc&) {
return;
}
assert(s2.size() == sz);
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_resize_max_size(const S& s) {
S s2(s);
const std::size_t sz = s2.max_size();
try {
s2.resize(sz, 'x');
} catch (const std::bad_alloc&) {
return;
}
assert(s.size() == sz);
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
{
S s;
assert(s.max_size() >= s.size());
assert(s.max_size() > 0);
if (!TEST_IS_CONSTANT_EVALUATED) {
test_resize_max_size_minus_1(s);
test_resize_max_size(s);
}
}
{
S s("123");
assert(s.max_size() >= s.size());
assert(s.max_size() > 0);
if (!TEST_IS_CONSTANT_EVALUATED) {
test_resize_max_size_minus_1(s);
test_resize_max_size(s);
}
}
{
S s("12345678901234567890123456789012345678901234567890");
assert(s.max_size() >= s.size());
assert(s.max_size() > 0);
if (!TEST_IS_CONSTANT_EVALUATED) {
test_resize_max_size_minus_1(s);
test_resize_max_size(s);
}
}
}
TEST_CONSTEXPR_CXX20 bool test() {
test_string<std::string>();
#if TEST_STD_VER >= 11
test_string<std::basic_string<char, std::char_traits<char>, min_allocator<char> > >();
#endif
return true;
}
int main(int, char**) {
test();
#if TEST_STD_VER >= 20
static_assert(test());
#endif
return 0;
}
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