Die and Exception Handling

Die: Programmatic Mapping of Perl's "die"

• Bivio.Die provides a throw/catch model for exceptions:

my($die) = Bivio::Die->catch(sub {
    .... operation ....
});
if ($die) {
    ... handle error/rethrow ...
}

• Every exception has a Bivio.DieCode (NOT_FOUND, CORRUPT_QUERY, etc.) plus an arbitrary collection of attributes.

• handle_die is called LIFO order on objects in the stack before the stack is unwound, that is, before a catch gets to see the exception.

• Die objects are chained if an exception is thrown within a handle_die

• Filtering handled in perl, not in Bivio.Die->catch

• Bivio.Die->eval is a catch, which tosses the Bivio.Die

• Stack tracing is controlled by caller (throw_quietly, catch_quietly, or "program_error" attribute)