factory_helpers.h

// -*- mode: c++; tab-width: 4; indent-tabs-mode: t; eval: (progn (c-set-style "stroustrup") (c-set-offset 'innamespace 0)); -*-
// vi:set ts=4 sts=4 sw=4 noet :
// Copyright 2013, The TPIE development team
// 
// This file is part of TPIE.
// 
// TPIE is free software: you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License as published by the
// Free Software Foundation, either version 3 of the License, or (at your
// option) any later version.
// 
// TPIE 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 Lesser General Public
// License for more details.
// 
// You should have received a copy of the GNU Lesser General Public License
// along with TPIE.  If not, see <http://www.gnu.org/licenses/>
 
#ifndef __TPIE_PIPELINING_FACTORY_HELPERS_H__
#define __TPIE_PIPELINING_FACTORY_HELPERS_H__
 
#include <tpie/pipelining/container.h>
#include <tpie/pipelining/factory_base.h>
#include <tpie/pipelining/node.h>
 
namespace tpie {
namespace pipelining {
 
template <template <typename dest_t> class R, typename... T>
class factory : public factory_base {
public:
    factory(const factory &) = delete;
    factory(factory &&) = default;
    factory & operator=(const factory &) = delete;
    factory & operator=(factory &&) = default;
 
    template <typename... Args>
    factory(Args && ... v) : cont(std::forward<Args>(v)...) {}
 
    template <typename dest_t>
    using constructed_type = R<typename bits::remove<dest_t>::type>;
 
    template <typename dest_t>
    constructed_type<dest_t> construct(dest_t && dest) {
        node_token tok = dest.get_token();
        constructed_type<dest_t> r = container_construct<constructed_type<dest_t>>(cont, std::forward<dest_t>(dest));
        this->init_node(r);
        this->add_default_edge(r, tok);
        this->add_node_set_edges(r);
        return r;
    }
 
    template <typename dest_t>
    constructed_type<dest_t> construct_copy(dest_t && dest) {
        node_token tok = dest.get_token();
        constructed_type<dest_t> r = container_construct_copy<constructed_type<dest_t>>(cont, std::forward<dest_t>(dest));
        this->init_node(r);
        this->add_default_edge(r, tok);
        this->add_node_set_edges(r);
        return r;
    }
 
private:
    container<T...> cont;
};
 
 
template <typename R, typename... T>
class termfactory : public factory_base {
public:
    typedef R constructed_type;
 
    termfactory(const termfactory & o) = delete;
    termfactory(termfactory && o) = default;
    termfactory & operator=(const termfactory & o) = delete;
    termfactory & operator=(termfactory && o) = default;
 
    template<typename... Args>
    termfactory(Args && ... v) : cont(std::forward<Args>(v)...) {}
 
    R construct() {
        R r = container_construct<R>(cont);
        this->init_node(r);
        this->add_node_set_edges(r);
        return r;
    }
 
    R construct_copy() {
        R r = container_construct_copy<R>(cont);
        this->init_node(r);
        this->add_node_set_edges(r);
        return r;
    }
private:
    container<T...> cont;
};
 
 
template <typename ...>
class Args;
 
template <template <typename dest_t, typename ... X> class R, typename Args, typename... T>
class tfactory {/*We should never use this*/};
 
template <template <typename dest_t, typename ... X> class R,
          typename ...TT, typename... T>
class tfactory<R, Args<TT...>, T...> : public factory_base {
public:
    tfactory(const tfactory & o) = delete;
    tfactory(tfactory && o) = default;
    tfactory & operator=(const tfactory & o) = delete;
    tfactory & operator=(tfactory && o) = default;
 
    template<typename... Args>
    tfactory(Args && ... v) : cont(std::forward<Args>(v)...) {}
 
    template<typename dest_t>
    using constructed_type = R<typename bits::remove<dest_t>::type, TT...>;
 
    template <typename dest_t>
    constructed_type<dest_t> construct(dest_t && dest) {
        node_token tok = dest.get_token();
        constructed_type<dest_t> r = container_construct<constructed_type<dest_t>>(cont, std::forward<dest_t>(dest));
        this->init_node(r);
        this->add_default_edge(r, tok);
        this->add_node_set_edges(r);
        return r;
    }
 
    template <typename dest_t>
    constructed_type<dest_t> construct_copy(dest_t && dest) {
        node_token tok = dest.get_token();
        constructed_type<dest_t> r = container_construct_copy<constructed_type<dest_t>>(cont, std::forward<dest_t>(dest));
        this->init_node(r);
        this->add_default_edge(r, tok);
        this->add_node_set_edges(r);
        return r;
    }
private:
    container<T...> cont;
};
 
 
template <template <typename item_type> class I, typename OB, template<typename dest_t> class O>
class split_factory : public factory_base {
public:
    template <typename dest_t>
    using constructed_type = I<typename push_type<dest_t>::type>;
 
    template <typename dest_t>
    constructed_type<dest_t> construct(dest_t && dest) const {
        node_token input_token;
        typedef typename push_type<dest_t>::type item_type;
        std::shared_ptr<OB> o = std::make_shared<O<dest_t> >(std::forward<dest_t>(dest), input_token);
        return I<item_type>(input_token, std::move(o));
    };
 
    template <typename dest_t>
    constructed_type<dest_t> construct_copy(dest_t && dest) const {
        return construct(std::forward<dest_t>(dest));
    };
};
 
} // namespace pipelining
} // namespace tpie
 
#endif // __TPIE_PIPELINING_FACTORY_HELPERS_H__