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Kas on võimalik teha tagasipöördumine funktsioonist väljaspool praegust konteksti Kotlinis, kui funktsioon on deklareeritud kui crossinline?
sobes.tech AI
Vastus AI-lt
In Kotlin, a function declared with the crossinline modifier prohibits the execution of uncontrolled returns (non-local return) from the lambda it accepts. This means that you cannot use return from the lambda to exit the outer function in which this lambda is called.
Example:
inline fun foo(crossinline block: () -> Unit) {
val runnable = Runnable {
block() // non-local return is not allowed here
}
runnable.run()
}
fun bar() {
foo {
// return // compile error, non-local return is not allowed
println("Lambda execution")
}
println("Continuation of function bar")
}
Therefore, returning from a function outside the current context within a crossinline lambda is impossible. This restriction was introduced for safety and predictability of the code, especially when using lambdas in asynchronous or deferred calls.