Method swap

include/covscript/core/variable.hpp:869–878

	public:
		void swap(any &obj, bool raw = false)
		{
			if (this->mDat != nullptr && obj.mDat != nullptr && raw) {
				if (mDat->protect_level != 0 || obj.mDat->protect_level > 0)
					throw cs::runtime_error("The variable has been protected");
				this->mDat->data.swap(obj.mDat->data);
			}
			else
				std::swap(this->mDat, obj.mDat);
		}

		void swap(any &&obj, bool raw = false)
		{