Method swap

include/behaviortree_cpp/contrib/any.hpp:182–209

Exchange the states of *this and rhs.

    /// Exchange the states of *this and rhs.
    void swap(any& rhs) noexcept
    {
        if(this->vtable != rhs.vtable)
        {
            any tmp(std::move(rhs));

            // move from *this to rhs.
            rhs.vtable = this->vtable;
            if(this->vtable != nullptr)
            {
                this->vtable->move(this->storage, rhs.storage);
                //this->vtable = nullptr; -- unneeded, see below
            }

            // move from tmp (previously rhs) to *this.
            this->vtable = tmp.vtable;
            if(tmp.vtable != nullptr)
            {
                tmp.vtable->move(tmp.storage, this->storage);
                tmp.vtable = nullptr;
            }
        }
        else // same types
        {
            if(this->vtable != nullptr)
                this->vtable->swap(this->storage, rhs.storage);
        }
    }

private: // Storage and Virtual Method Table