Exceptions

An exception is thrown by the die keyword, which, if not caught, it terminates the program with an appropriate exit code.

try  {
    die "I'm dead!"        # throws an exception
}
catch { |msg|
    say "msg: #{msg}"      # msg: I'm dead! at test.sf line 2.
}

say "I'm alive..."
die "Now I'm dead!"        # this line terminates the program
say "Or am I?"             # Yes, you are!

Output:

msg: I'm dead! at test.sf line 2.
I'm alive...
Now I'm dead! at test.sf line 9.