Ah! Forum topic morph. I fooled with the quote stuff for years before I could pretend to understand them.
RAC On Jul 8, 2011, at 12:38 AM, Bas Steunebrink <[email protected]> wrote: > Of course you're right. But my original question was simply whether or not > the expression `'unquote should produce an error. > > Cheers, > Bas > > > Op 8-7-2011 5:52, Richard Cleis schreef: >> I don't get it. The quotes are conveniences. If they are not convenient, >> why can't you merely list what you want? >> >> (list '... ''unquote '...) >> >> rac >> >> On Jul 7, 2011, at 8:33 AM, Bas Steunebrink wrote: >> >>> Thanks for the fast answers! >>> Actually I wanted to get 'unquote inside of a quasiquote; I'm now using: >>> `(... ,''unquote ...) >>> It ain't pretty but it appears to do the job! :-) >>> >>> Bas >>> >>> >>> On 7/7/11 16:20 PM, Robby Findler wrote: >>>> FWIW, I'm right in line with this rationale. >>>> >>>> Robby >>>> >>>> On Thu, Jul 7, 2011 at 9:13 AM, Matthias Felleisen<[email protected]> >>>> wrote: >>>>> On Jul 7, 2011, at 10:01 AM, Bas Steunebrink wrote: >>>>> >>>>>> Ciao a tutti, >>>>>> >>>>>> When I type `'unquote in DrRacket, an error is thrown: >>>>>> >>>>>>> `'unquote >>>>>> (X) unquote: expects exactly one expression in: (unquote) >>>>>> >>>>>> I understand why this error occurs from the way quasiquote is expanded; >>>>>> see e.g. http://community.schemewiki.org/?scheme-faq-language#qqmacro (I >>>>>> guess DrRacket works similarly). Still, I feel the result should be just >>>>>> 'unquote. What do you think? >>>>> No, your use of backquote explicitly calls for a search for unquote. >>>>> >>>>> If you want the symbol unquote inside of an unquote, you first need to >>>>> unquote: >>>>> >>>>>> `,'unquote >>>>> unquote >>>>> >>>>> (as in comma = unquote). >>>>> _________________________________________________ >>>>> For list-related administrative tasks: >>>>> http://lists.racket-lang.org/listinfo/users >>>>> >>> _________________________________________________ >>> For list-related administrative tasks: >>> http://lists.racket-lang.org/listinfo/users _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
