Hey guys, can some one please tell me what is this “@addOnCompleteListener” returned here? I search...

# android

[Ofir Bar]

Hey guys, can some one please tell me what is this “@addOnCompleteListener” returned here?

I searched for “kotlin @” and kotlin annotations, but it seems not to be what is in this code.
How is it called? (marked in red square).

Please ignore the red arrow for now, this is a different question

[Ben Abramovitch]

It's telling it to return to that point in the code, 4 lines up has the addCompletionListener. So it will exit out of the listener

[Ben Abramovitch]

If you have nested things you sometimes need to be specific about which return

[Vsevolod Kaganovych]

To return from addOnCompleteListener lambda, you specify its name explicitly. If you type just return, it will return from the createUser function.

[Anastasia Finogenova]

https://kotlinlang.org/docs/reference/returns.html refer docs

[Ofir Bar]

thanks guys @Ben Abramovitch @Vsevolod Kaganovych

I still don’t get something.
If I remove the @addCompleteListener, I get a compilation error anyway.

Why do I need to explicitly mention it then?

[Anastasia Finogenova]

It is called returns at label

[Ofir Bar]

thanks! this is exactly what I looked for @Anastasia Finogenova

[StavFX]

Ofir, this is why the @ is required.
If the method you are calling is inline, you have the option to either return from the lambda (what you are trying to do), or, like Vsevolod said, return from f().
Since the method you are calling is not inlined, you cannot return f() from inside the lambda, but you still must declare it properly, so that if addOnCompleteListener ever becomes an inline method - your implementation won’t break.

[Ofir Bar]

@StavFX
Toda gever, I get it now 🙂, shabat shalom!