"return" and "try-catch-finally" block evaluation in scala

Question

The following two code generate different result:

def x = try{
  true
} finally false

invoke x gets true

def y:Boolean = try{
  return true
} finally {
  return false
}

invoke y gets false

the return version behave same as Java.

Personally I never use 'return' in scala. But it's good to know how scala evaluate the value of a try-catch-finally block. Thanks.

Answer 1

You should not have a return statement in a finally block (even though it is technically allowed, at least in Java, C# for example forbids it).

If the Scala finally block had an implicit return, that would always clobber the intended return value. So that makes no sense.

But I suppose it cannot help you if you explicitly write it that way.