Escaping बनाम non-escaping, autoclosures

// Need @escaping when storing for later use:
var tasks: [() -> Void] = []

func addTask(_ work: @escaping () -> Void) {
    tasks.append(work)  // stored to run later
}

addTask { print("run later") }
tasks.forEach { $0() }

func fetchData(completion: @escaping (String) -> Void) {
    // simulate async: call completion in the future
    // (In real apps, use DispatchQueue or URLSession)
    completion("done")  // still escaping by contract (may be called later)
}
fetchData { result in print(result) }

// @autoclosure converts an expression into () -> Bool automatically.
func logIf(_ condition: @autoclosure () -> Bool) {
    if condition() { print("Condition is true") }
}

let x = 3
logIf(x > 1)       // no braces needed; expression is turned into a closure

// You can combine @autoclosure with @escaping:
// (be careful: the expression is captured and evaluated later)
var checks: [() -> Bool] = []

func enqueueCheck(_ condition: @autoclosure @escaping () -> Bool) {
    checks.append(condition)   // stored to run later
}

var threshold = 10
enqueueCheck(threshold > 5)   // captures current variable by reference semantics
threshold = 3
print(checks.map { $0() })    // re-evaluates with updated threshold