Exception scope and handling

[Sandro Binetti <sandrobinetti@my-deja.com>]

 There's something that's not clear, or, better, I can't understand
about exception scope and handling.

Suppose to declarate an exception inside the declarative region of a
procedure, and handle it at the end of the body of the procedure.
What's the meaning of re-raising this exception outside this body?

Take a simple example:

procedure PROC1 is

  procedure PROC2 is
    FOO:EXCEPTION;
  begin
    ....
    ....
  EXCEPTION
    when FOO => handle_it;
                raise; -- ???? what's the meaning of this
  end proc2;

begin
  ...
  ...
  ...
  -- what kind of object is FOO here?
EXCEPTION
  when others => -- ???? why coul'd I handle FOO here, even if I don't
                 -- know anything about it?
end proc1;

--
Ciao, Sandro


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