Method clone

include/covscript/core/variable.hpp:891–900

		}

		void clone()
		{
			if (mDat != nullptr) {
				if (mDat->protect_level > 2)
					throw cs::runtime_error("Duplicate singleton objects are not allowed");
				proxy *dat = get_allocator().alloc(1, mDat->data);
				recycle();
				mDat = dat;
			}
		}

		void try_move() const
		{