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

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

To return from addOnCompleteListener lambda, you specify its name explicitly. If you type just

return

, it will return from the

createUser

function.

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

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?

It is called returns at label

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

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.

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