MsgFactoryOptionsParser.h

//
// Copyright 2017 - 2026 (C). Alex Robenko. All rights reserved.
//
// SPDX-License-Identifier: MPL-2.0
//
// 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/.
 
#pragma once
 
#include "comms/options.h"
 
#include <tuple>
#include <type_traits>
#include <utility>
 
namespace comms
{
 
namespace details
{
 
template <typename... TOptions>
class MsgFactoryOptionsParser;
 
template <>
class MsgFactoryOptionsParser<>
{
public:
    static constexpr bool HasInPlaceAllocation = false;
    static constexpr bool HasSupportGenericMessage = false;
    static constexpr bool HasForcedDispatch = false;
 
    using GenericMessage = void;
 
    template <typename TAll>
    using AllMessages = TAll;
};
 
template <typename... TOptions>
class MsgFactoryOptionsParser<comms::option::app::InPlaceAllocation, TOptions...> :
        public MsgFactoryOptionsParser<TOptions...>
{
public:
    static constexpr bool HasInPlaceAllocation = true;
};
 
template <typename TMsg, typename... TOptions>
class MsgFactoryOptionsParser<comms::option::app::SupportGenericMessage<TMsg>, TOptions...> :
        public MsgFactoryOptionsParser<TOptions...>
{
public:
    static constexpr bool HasSupportGenericMessage = true;
    using GenericMessage = TMsg;
 
    template <typename TAll>
    using AllMessages =
        typename std::decay<
            decltype(
                std::tuple_cat(
                    std::declval<TAll>(),
                    std::declval<std::tuple<GenericMessage> >()
                )
            )
        >::type;
};
 
template <typename T, typename... TOptions>
class MsgFactoryOptionsParser<comms::option::app::ForceDispatch<T>, TOptions...> :
        public MsgFactoryOptionsParser<TOptions...>
{
public:
    static constexpr bool HasForcedDispatch = true;
    using ForcedDispatch = T;
};
 
template <typename... TOptions>
class MsgFactoryOptionsParser<
    comms::option::app::EmptyOption,
    TOptions...> : public MsgFactoryOptionsParser<TOptions...>
{
};
 
template <typename... TBundledOptions, typename... TOptions>
class MsgFactoryOptionsParser<
    std::tuple<TBundledOptions...>,
    TOptions...> : public MsgFactoryOptionsParser<TBundledOptions..., TOptions...>
{
};
 
} // namespace details
 
} // namespace comms