registration.hpp

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/*
 * This file is part of Algorithms library toolkit.
 * Copyright (C) 2017 Jan Travnicek (jan.travnicek@fit.cvut.cz)
 
 * Algorithms library toolkit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 
 * Algorithms library toolkit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 
 * You should have received a copy of the GNU General Public License
 * along with Algorithms library toolkit.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include <functional>
 
namespace ext {
 
template < class T >
class Register {
    T m_data;
 
    std::function < void ( const T & ) > m_finish;
public:
    template < class InitCallback, class FinalizeCallback >
    explicit Register ( InitCallback init, FinalizeCallback finish ) : m_data ( init ( ) ), m_finish ( std::move ( finish ) ) {
    }
 
    template < class InitCallback >
    explicit Register ( InitCallback init ) : Register ( init, [] ( const T & ) { } ) {
    }
 
    Register ( const Register & ) = delete;
 
    Register ( Register && other ) noexcept : m_data ( std::move ( other.m_data ) ), m_finish ( std::move ( other.m_finish ) ) {
        other.m_finish = [] ( const T & ) { };
    }
 
    Register & operator = ( const Register & ) = delete;
 
    Register & operator = ( Register && other ) = delete;
 
    ~Register ( ) {
        m_finish ( m_data );
    }
};
 
template < >
class Register < void > {
    std::function < void ( ) > m_finish;
public:
    template < class InitCallback, class FinalizeCallback >
    explicit Register ( InitCallback init, FinalizeCallback finish ) : m_finish ( std::move ( finish ) ) {
        init ( );
    }
 
    template < class InitCallback >
    explicit Register ( InitCallback init ) : Register ( init, [] ( ) { } ) {
    }
 
    Register ( const Register & ) = delete;
 
    Register ( Register && other ) noexcept : m_finish ( std::move ( other.m_finish ) ) {
        other.m_finish = [] ( ) { };
    }
 
    Register & operator = ( const Register & ) = delete;
 
    Register & operator = ( Register && other ) = delete;
 
    ~Register ( ) {
        m_finish ( );
    }
};
 
} /* namespace ext */