src/third_party/llvm-project/libcxx/test/std/containers/sequences/vector/vector.capacity/shrink_to_fit.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <vector>

// void shrink_to_fit();

#include <vector>
#include <cassert>
#include "test_allocator.h"
#include "min_allocator.h"
#include "asan_testing.h"

int main()
{
    {
        std::vector<int> v(100);
        v.push_back(1);
        assert(is_contiguous_container_asan_correct(v));
        v.shrink_to_fit();
        assert(v.capacity() == 101);
        assert(v.size() == 101);
        assert(is_contiguous_container_asan_correct(v));
    }
    {
        std::vector<int, limited_allocator<int, 401> > v(100);
        v.push_back(1);
        assert(is_contiguous_container_asan_correct(v));
        v.shrink_to_fit();
        assert(v.capacity() == 101);
        assert(v.size() == 101);
        assert(is_contiguous_container_asan_correct(v));
    }
#ifndef _LIBCPP_NO_EXCEPTIONS
    {
        std::vector<int, limited_allocator<int, 400> > v(100);
        v.push_back(1);
        assert(is_contiguous_container_asan_correct(v));
        v.shrink_to_fit();
        LIBCPP_ASSERT(v.capacity() == 200); // assumes libc++'s 2x growth factor
        assert(v.size() == 101);
        assert(is_contiguous_container_asan_correct(v));
    }
#endif
#if TEST_STD_VER >= 11
    {
        std::vector<int, min_allocator<int>> v(100);
        v.push_back(1);
        assert(is_contiguous_container_asan_correct(v));
        v.shrink_to_fit();
        assert(v.capacity() == 101);
        assert(v.size() == 101);
        assert(is_contiguous_container_asan_correct(v));
    }
#endif
}