On 05/12/11 09:50, Andy Wingo wrote: > On Thu 12 May 2011 09:38, Alex Shinn <alexshinn@gmail.com> writes: > >> On Thu, May 12, 2011 at 4:26 PM, Andy Wingo <wingo@pobox.com> wrote: >>> >>> It's probably just wishful thinking, but it would be nice if we used the >>> same arities here, though... I don't want to be all imperialist and say >>> "hey chickeners! you must change your thing!", but the single-arity >>> transformers might even be better for yall as well (for source >>> information, for example; though is that a red herring?). >> >> Yes, source info is a red herring - all of the SC and ER >> systems I know retain source info. > > Even for bare identifiers, and other values that can't be put into weak > eq? table, as I mentioned in an earlier mail? Ah, I see, it's about atoms like symbols. As any given symbol may appear in lots of different input files, be generated by STRING->SYMBOL, etc, its unique identity can't be used to give a particular instance of it (as an identifier in a given lexical scope) properties with a weak map, as can be done with the pairs that make up the structure of the source. How is that handled in practice by SC/ER implementations, then? >> I'm still unclear by your motivation. > > I wish you would address my points instead of parody and questioning my > motivation. Don't fight, people. I think Andy's point about not being able to do everything with weak maps got lost in the noise, and is IMHO a key point about using abstract syntax objects (which can carry all the metadata they want) rather than passing around sexprs with separate contextual information in procedures etc. as SC/ER do. As is often the case, people are missing each other's key points, arguing about non-key points, and then getting upset when they find each other seeming to be pig headed :-) YOU ARE ALL LOVELY PEOPLE. REMEMBER THIS FACT. AND DO ALL YOU CAN TO COOPERATE TO MAKE SCHEME GREAT. > Andy ABS -- Alaric Snell-Pym http://www.snell-pym.org.uk/alaric/ _______________________________________________ Scheme-reports mailing list Scheme-reports@scheme-reports.org http://lists.scheme-reports.org/cgi-bin/mailman/listinfo/scheme-reports
