David Wright wrote:
Your $thingy could be a hashref, in which case $thingy->isa will die.
The point of the discussion is that you should be checking if $thingy is
blessed() first, as UNIVERSAL::isa breaks for objects that masquerade as
other objects (e.g. via an adaptor pattern).
I've been using it a lot recently to catch exceptions. What's so wrong
with the below, almost identical to the example in perldoc -f die? I'd
rather not die again immediately by assuming [EMAIL PROTECTED]>isa will work.
eval {
# do some stuff
};
if ( $@ ) {
if( UNIVERSAL::isa($@, 'My::Exception') ) {
# known exception, handle appropriately
}
else {
die "Ooops-a-daisy: $@";
}
}
Exception::Class now offers the "caught" method so you don't have to use
UNIVERSAL::isa that way. I also wrote Exception::Class::TryCatch for a
little more helpful sugar:
eval {
# do stuff;
};
# catch() upgrades non-object $@ to Exception::Class::Base
if ( catch my $err ) {
if ( $err->isa('My::Exception') ) {
# handle it
}
else {
$err->rethrow;
}
}
Regards,
David Golden
