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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
// <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 "test_macros.h"
#include "min_allocator.h"
template <class S>
TEST_CONSTEXPR_CXX20 void
test1(const S& s)
{
S s2(s);
const 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
test2(const S& s)
{
S s2(s);
const 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(const S& s)
{
assert(s.max_size() >= s.size());
test1(s);
test2(s);
}
void test() {
{
typedef std::string S;
test(S());
test(S("123"));
test(S("12345678901234567890123456789012345678901234567890"));
}
#if TEST_STD_VER >= 11
{
typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
test(S());
test(S("123"));
test(S("12345678901234567890123456789012345678901234567890"));
}
#endif
}
#if TEST_STD_VER > 17
constexpr bool test_constexpr() {
std::string str;
size_t size = str.max_size();
assert(size > 0);
return true;
}
#endif
int main(int, char**)
{
test();
#if TEST_STD_VER > 17
test_constexpr();
static_assert(test_constexpr());
#endif
return 0;
}
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