Minimize code nesting by using Swift features like `guard` statements and early returns instead of deeply nested if-else structures. When multiple code branches end with a return statement, avoid nesting with `else` clauses. Instead of: ```swift if index == count { return try body(accumulated) } else { // More nested code here } ``` Prefer: ```swift if index == count { return try body(accumulated) } // Continue with the flow without nesting ``` Or consider using `guard` statements for early returns: ```swift guard case .split(let c) = node else { return } // Now work with the unwrapped variable ``` This approach makes code more scannable, easier to follow, and less prone to the "pyramid of doom" issue that can happen with multiple levels of nesting.