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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// <map>
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// class multimap
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// node_type extract(const_iterator);
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#include <map>
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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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    auto some_key = c.cbegin()->first;
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    for (auto first = c.cbegin(); first != c.cend();)
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    {
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        auto key_value = first->first;
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        typename Container::node_type t = c.extract(first++);
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        --sz;
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        assert(t.key() == key_value);
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        t.key() = some_key;
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        assert(t.key() == some_key);
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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 map_type = std::multimap<int, int>;
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        map_type m = {{1,1}, {2,2}, {3,3}, {4,4}, {5,5}, {6,6}};
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        test(m);
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    }
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    {
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        std::multimap<Counter<int>, Counter<int>> m =
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            {{1,1}, {2,2}, {3,3}, {4,4}, {5,5}, {6,6}};
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        assert(Counter_base::gConstructed == 12);
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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_map =
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            std::multimap<int, int, std::less<int>,
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                     min_allocator<std::pair<const int, int>>>;
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        min_alloc_map m = {{1, 1}, {2, 2}, {3, 3}, {4, 4}, {5, 5}, {6, 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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