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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>
// void reserve(size_type res_arg); // constexpr since C++20
// This test relies on https://llvm.org/PR45368 (841132e) being fixed, which isn't in
// older Apple dylibs.
// XFAIL: using-built-library-before-llvm-12
#include <string>
#include <stdexcept>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
#include "asan_testing.h"
template <class S>
TEST_CONSTEXPR_CXX20 void
test(typename S::size_type min_cap, typename S::size_type erased_index, typename S::size_type res_arg) {
S s(min_cap, 'a');
s.erase(erased_index);
assert(s.size() == erased_index);
assert(s.capacity() >= min_cap); // Check that we really have at least this capacity.
LIBCPP_ASSERT(is_string_asan_correct(s));
#if TEST_STD_VER > 17
typename S::size_type old_cap = s.capacity();
#endif
S s0 = s;
if (res_arg <= s.max_size()) {
s.reserve(res_arg);
LIBCPP_ASSERT(s.__invariants());
assert(s == s0);
assert(s.capacity() >= res_arg);
assert(s.capacity() >= s.size());
LIBCPP_ASSERT(is_string_asan_correct(s));
#if TEST_STD_VER > 17
assert(s.capacity() >= old_cap); // reserve never shrinks as of P0966 (C++20)
#endif
}
#ifndef TEST_HAS_NO_EXCEPTIONS
else if (!TEST_IS_CONSTANT_EVALUATED) {
try {
s.reserve(res_arg);
LIBCPP_ASSERT(s.__invariants());
assert(false);
} catch (std::length_error&) {
assert(res_arg > s.max_size());
}
}
#endif
}
template <class S>
TEST_CONSTEXPR_CXX20 void test_string() {
{
test<S>(0, 0, 5);
test<S>(0, 0, 10);
test<S>(0, 0, 50);
}
{
test<S>(100, 1, 5);
test<S>(100, 50, 5);
test<S>(100, 50, 10);
test<S>(100, 50, 50);
test<S>(100, 50, 100);
test<S>(100, 50, 1000);
test<S>(100, 50, S::npos);
}
{ // Check that growing twice works as expected
S str;
str.reserve(50);
assert(str.capacity() >= 50);
size_t old_cap = str.capacity();
str.reserve(str.capacity() + 1);
assert(str.capacity() > old_cap);
}
}
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 > 17
static_assert(test());
#endif
return 0;
}
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