Brian Harvey scripsit:
> > The fight then will be about Unicode, case-sensitivity, modules,
> > and records no?
>
> I believe that John Cowan has settled the Unicode problem in a way that
> will actually make everyone happy. So, we're 25% of the way done! :-)
I don't think there's anything to add to SRFI-9 as far as records for
Thing One are concerned, except a way to add a record-printer that
"display" and "write" would respect. The obvious strategy is to
interpret the fourth argument, if it is an identifier rather than a
list, as the name of a procedure to be called when printing is required.
The resulting syntax is:
(define-record-type typename (constructor args ...) predicate [printer]
(field-tag accessor [mutator]) ...)
Note that this is an "output" argument to define-record-type; it specifies
not a procedure to be generated, but one to be invoked.
Alternatively, we could provide separate syntax or even a procedure to
inform the reader what printer to use.
--
Said Agatha Christie / To E. Philips Oppenheim John Cowan
"Who is this Hemingway? / Who is this Proust? [email protected]
Who is this Vladimir / Whatchamacallum, http://www.ccil.org/~cowan
This neopostrealist / Rabble?" she groused.
--George Starbuck, Pith and Vinegar
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