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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
//
//===----------------------------------------------------------------------===//
// <vector>
// vector<bool>
// void shrink_to_fit();
// XFAIL: FROZEN-CXX03-HEADERS-FIXME
#include <cassert>
#include <climits>
#include <vector>
#include "increasing_allocator.h"
#include "min_allocator.h"
#include "test_macros.h"
TEST_CONSTEXPR_CXX20 bool tests() {
{
using C = std::vector<bool>;
C v(100);
v.push_back(1);
C::size_type before_cap = v.capacity();
v.clear();
v.shrink_to_fit();
assert(v.capacity() <= before_cap);
LIBCPP_ASSERT(v.capacity() == 0); // libc++ honors the shrink_to_fit request as a QOI matter
assert(v.size() == 0);
}
{
using C = std::vector<bool, min_allocator<bool> >;
C v(100);
v.push_back(1);
C::size_type before_cap = v.capacity();
v.shrink_to_fit();
assert(v.capacity() >= 101);
assert(v.capacity() <= before_cap);
assert(v.size() == 101);
v.erase(v.begin() + 1, v.end());
v.shrink_to_fit();
assert(v.capacity() <= before_cap);
LIBCPP_ASSERT(v.capacity() == C(1).capacity()); // libc++ honors the shrink_to_fit request as a QOI matter.
assert(v.size() == 1);
}
#if defined(_LIBCPP_VERSION)
{
using C = std::vector<bool>;
unsigned bits_per_word = static_cast<unsigned>(sizeof(C::__storage_type) * CHAR_BIT);
C v(bits_per_word);
v.push_back(1);
assert(v.capacity() == bits_per_word * 2);
assert(v.size() == bits_per_word + 1);
v.pop_back();
v.shrink_to_fit();
assert(v.capacity() == bits_per_word);
assert(v.size() == bits_per_word);
}
{
using C = std::vector<bool>;
unsigned bits_per_word = static_cast<unsigned>(sizeof(C::__storage_type) * CHAR_BIT);
C v;
v.reserve(bits_per_word * 2);
v.push_back(1);
assert(v.capacity() == bits_per_word * 2);
assert(v.size() == 1);
v.shrink_to_fit();
assert(v.capacity() == bits_per_word);
assert(v.size() == 1);
}
#endif
return true;
}
#if TEST_STD_VER >= 23
// https://github.com/llvm/llvm-project/issues/95161
constexpr bool test_increasing_allocator() {
std::vector<bool, increasing_allocator<bool>> v;
v.push_back(1);
std::size_t capacity = v.capacity();
v.shrink_to_fit();
assert(v.capacity() <= capacity);
assert(v.size() == 1);
return true;
}
#endif // TEST_STD_VER >= 23
int main(int, char**) {
tests();
#if TEST_STD_VER > 17
static_assert(tests());
#endif
#if TEST_STD_VER >= 23
test_increasing_allocator();
static_assert(test_increasing_allocator());
#endif // TEST_STD_VER >= 23
return 0;
}
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