llvm-project

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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03, c++11, c++14
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// <set>
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// class multiset
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// node_type extract(const_iterator);
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#include <set>
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#include "test_macros.h"
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#include "min_allocator.h"
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#include "Counter.h"
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template <class Container>
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void test(Container& c)
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{
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    std::size_t sz = c.size();
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    for (auto first = c.cbegin(); first != c.cend();)
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    {
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        auto key_value = *first;
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        typename Container::node_type t = c.extract(first++);
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        --sz;
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        assert(t.value() == key_value);
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        assert(t.get_allocator() == c.get_allocator());
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        assert(sz == c.size());
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    }
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    assert(c.size() == 0);
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}
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int main(int, char**)
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{
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    {
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        using set_type = std::multiset<int>;
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        set_type m = {1, 2, 3, 4, 5, 6};
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        test(m);
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    }
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    {
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        std::multiset<Counter<int>> m = {1, 2, 3, 4, 5, 6};
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        assert(Counter_base::gConstructed == 6);
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        test(m);
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        assert(Counter_base::gConstructed == 0);
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    }
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    {
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        using min_alloc_set = std::multiset<int, std::less<int>, min_allocator<int>>;
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        min_alloc_set m = {1, 2, 3, 4, 5, 6};
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        test(m);
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    }
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  return 0;
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}
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