Re: RFC 63 (v3) Exception handling syntax

On 15 Aug 2000, Perl6 RFC Librarian wrote:

> =head2 Exceptions
> 
> Exceptions are objects belonging to some C<Exception> class.  C<throw>ing
> an exception creates the object; therefore, C<EXCEPTION> above is just a
> class name.  C<Error.pm> lets you subclass C<Error> to create them;
> C<Exception> appears to be a better name for a core functionality.
> 
> The C<exception> function is just syntactic sugar for creating a new
> exception class;it merely amounts to C<@EXCEPTION::ISA = 'Exception'>.

I think its important to also provide some syntactic sugar for creating a
hierarchical structure more than 2 levels deep.

For example, I may have an Exception::Foo and then want an
Exception::Foo::DB subclass of it.

My Exception::Class module on CPAN is pretty much all about being able to
do this easily.  It also implements a base exception but that's really for
convenience and isn't necessary.


-dave

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