ClickHouse/base/poco/Foundation/include/Poco/KeyValueArgs.h

//
// KeyValueArgs.h
//
// Library: Foundation
// Package: Cache
// Module:  KeyValueArgs
//
// Definition of the KeyValueArgs class.
//
// Copyright (c) 2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef Foundation_KeyValueArgs_INCLUDED
#define Foundation_KeyValueArgs_INCLUDED


#include "Poco/Foundation.h"


namespace Poco
{


template <class TKey, class TValue>
class KeyValueArgs
/// Simply event arguments class to transfer a key and a value via an event call.
/// Note that key and value are *NOT* copied, only references to them are stored.
{
public:
    KeyValueArgs(const TKey & aKey, const TValue & aVal) : _key(aKey), _value(aVal) { }

    KeyValueArgs(const KeyValueArgs & args) : _key(args._key), _value(args._value) { }

    ~KeyValueArgs() { }

    const TKey & key() const
    /// Returns a reference to the key,
    {
        return _key;
    }

    const TValue & value() const
    /// Returns a Reference to the value.
    {
        return _value;
    }

protected:
    const TKey & _key;
    const TValue & _value;

private:
    KeyValueArgs & operator=(const KeyValueArgs & args);
};


} // namespace Poco


#endif // Foundation_KeyValueArgs_INCLUDED