VariantResetOnDestruct.h

//
// Copyright 2017 - 2025 (C). Alex Robenko. All rights reserved.
//
// 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 <type_traits>
 
namespace comms
{
 
namespace field
{
 
namespace adapter
{
 
template <typename TBase>
class VariantResetOnDestruct : public TBase
{
    using BaseImpl = TBase;
    static_assert(std::is_same<typename BaseImpl::CommsTag, comms::field::tag::Variant>::value, "Applicable only to variant fields");
public:
 
    ~VariantResetOnDestruct()
    {
        BaseImpl::reset();
    }
 
    VariantResetOnDestruct() = default;
    VariantResetOnDestruct(const VariantResetOnDestruct&) = default;
    VariantResetOnDestruct(VariantResetOnDestruct&&) = default;
    VariantResetOnDestruct& operator=(const VariantResetOnDestruct&) = default;
    VariantResetOnDestruct& operator=(VariantResetOnDestruct&&) = default;
 
    template <typename TIter>
    ErrorStatus read(TIter& iter, std::size_t len)
    {
        BaseImpl::reset();
        return BaseImpl::read(iter, len);
    }
 
};
 
}  // namespace adapter
 
}  // namespace field
 
}  // namespace comms