Scala: Silently catch all exceptions

Question

Empty catch block seems to be invalid in Scala

try {
  func()
} catch {

} // error: illegal start of simple expression

How I can catch all exceptions without their processing?

Answer 1

Some exceptions really aren't meant to be caught. You can request it anyway:

try { f(x) }
catch { case _: Throwable => }

but that's maybe not so safe.

All the safe exceptions are matched by scala.util.control.NonFatal, so you can:

import scala.util.control.NonFatal
try { f(x) }
catch { case NonFatal(t) => }

for a slightly less risky but still very useful catch.

Or scala.util.Try can do it for you:

Try { f(x) }

and you can pattern match on the result if you want to know what happened. (Try doesn't work so well when you want a finally block, however.)

Answer 2

In

import scala.util.Try

val res = Try (func()) toOption 

if the Try is successful you will get a Some(value), if it fails a None.