const internal/types/errors.UnassignableOperand

4 uses

	internal/types/errors (current package)
		code_string.go#L29: 	_ = x[UnassignableOperand-18]
		codes.go#L176: 	UnassignableOperand

	go/types
		assignments.go#L242: 		check.errorf(&x, UnassignableOperand, "cannot assign to %s (neither addressable nor a map index expression)", x.expr)
		assignments.go#L565: 				check.errorf(lhs, UnassignableOperand, "cannot assign to %s", lhs)