Hi Andrew, thank you for these explanations. I wouldn't have thought of trying the construct in another Scheme implementation (although Racket should still be installed somewhere on my PC ...).
So it more or less boils down to a syntax error that Guile doesn't really understand. Maybe because the (1 . 2) looks somewhat like an improper list to the parser? Anyway, now I'm closer to provide a proper explanation (you know where). Best Urs Am 22.04.2016 um 03:04 schrieb Andrew Bernard: > Hi Urs, > > I’d say it is poor error reporting on the part of guile. (Oh no, I’m > not starting that again! :-)) > > If you look at what racket says in these cases, which is clear, you > can see tha guile makes a poor job of explaining to the user in your > example. No wonder you are confused by guile. > > racket: > > > (1 2 3) > application: not a procedure; > expected a procedure that can be applied to arguments > given: 1 > arguments...: > 2 > 3 > context...: > /home/andro/racket/collects/racket/private/misc.rkt:87:7 > > (1 . 2) > stdin::40: application: bad syntax > in: (1 . 2) > context...: > /home/andro/racket/collects/racket/private/misc.rkt:87:7 > > > Something I notice is that you get an ABORT which is presumably the > result of an error having been thrown, and guile does not have an > appropriate key for this so they just use the wrong number of > arguments key. There needs to be a key ‘bad syntax’ to throw for this > error. That would be better. > > In guile 2 we get: > > scheme@(guile-user)> (1 2 3) > ERROR: In procedure 1: > ERROR: Wrong type to apply: 1 > > scheme@(guile-user)> (1 . 2) > While compiling expression: > ERROR: Syntax error: > unknown file:1:0: source expression failed to match any pattern in > form (1 . 2) > > So this has been addressed in guile 2. > > Andrew > > _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org https://lists.gnu.org/mailman/listinfo/lilypond-user
