/*

 * SPDX-FileCopyrightText: 2016 Mathieu Stefani

 *

 * SPDX-License-Identifier: Apache-2.0

 */

/*

   Mathieu Stefani, 28 février 2016

   A collection of sample iterator adapters

*/

#pragma once

namespace Pistache

{

    template <typename Map>

    struct FlatMapIteratorAdapter

    {

        typedef typename Map::key_type Key;

        typedef typename Map::mapped_type Value;

        typedef typename Map::const_iterator const_iterator;

        explicit FlatMapIteratorAdapter(const_iterator _it)

            : it(_it)

        { }

        FlatMapIteratorAdapter& operator++()

        {

            ++it;

            return *this;

        }

        const Value& operator*() { return it->second; }

        bool operator==(FlatMapIteratorAdapter other) { return other.it == it; }

        bool operator!=(FlatMapIteratorAdapter other) { return !(*this == other); }

    private:

        const_iterator it;

    };

    template <typename Map>

    FlatMapIteratorAdapter<Map>

    makeFlatMapIterator(const Map&, typename Map::const_iterator it)

    {

        return FlatMapIteratorAdapter<Map>(it);

    }

} // namespace Pistache