libcruft-util/alloc/forwarding.hpp

/*
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * Copyright 2018 Danny Robson <danny@nerdcruft.net>
 */

#ifndef CRUFT_UTIL_ALLOC_FORWARDING_HPP
#define CRUFT_UTIL_ALLOC_FORWARDING_HPP

#include <utility>

namespace cruft::alloc {
    template <typename BackingT>
    class forwarding {
    public:
        explicit forwarding (BackingT &backing):
            m_backing (backing)
        { ; }

        template <typename T, typename ...Args>
        auto allocate (Args &&...args)
        {
            return m_backing.template allocate<T> (std::forward<Args> (args)...);
        }

        template <typename T, typename ...Args>
        auto deallocate (Args &&...args)
        {
            return m_backing.template deallocate<T> (std::forward<Args> (args)...);
        }

        auto data  (void) { return m_backing.data ();  }
        auto begin (void) { return m_backing.begin (); }
        auto end   (void) { return m_backing.end ();   }

        auto data  (void) const { return m_backing.data ();  }
        auto begin (void) const { return m_backing.begin (); }
        auto end   (void) const { return m_backing.end ();   }

        auto capacity (void) const { return m_backing.capacity (); }
        auto used     (void) const { return m_backing.used (); }
        auto remain   (void) const { return m_backing.remain (); }

    private:
        BackingT &m_backing;
    };
};

#endif