Include logging in Elvis operator?

Question

As far as I can see, the only way to use the elvis operator is with syntax like this:

foo = bar ?: return

I was curious if anyone has come up with a way to include logging, as generally the return is used (at least in my experience) when something does not behave as expected.

However, the following syntax is invalid:

foo = bar ?: {
   Log.e(TAG, "Some error occurred.")
   return
}

Of course I could simply do the following,

foo = bar
if (foo == null) {
   Log.e(TAG, "Some error occurred.")
   return
}

but is there any way of including logging with the Elvis operator?

Answer 1

Just use the run { ... } function from kotlin-stdlib, which runs the lambda it is passed:

foo = bar ?: run { 
    Log.e(TAG, "Some error occurred.")
    return
}