When I was writing the Antlr version of the parser I realized that extending the grammar in dozens of ways makes much more complicatons and unreadability than you gain in compactness. Actually I don't like that I almost have to reimplement LilyPond just to be able to decide if an input is syntactically correct. :-)
So I'd always prefer extensions that do not change the syntax. But I may be not right. Bert > ------- Original Message ------- > From: [EMAIL PROTECTED] > To: Erik Sandberg <[EMAIL PROTECTED]> > Sent: 07. 01. 08., 5:54:21 > Subject: New argument types (Was: Constructive Criticism and a Question) > > On Sun, 7 Jan 2007, Erik Sandberg wrote: > > > BTW, one of the biggest problems (IMHO) in the lilypond language is that > > we can't extend the parser to accept durations as parameters to music > > functions: \foo c 4. is ambiguous; it's unclear whether the 4. is the > > c's duration, or if it's a separate argument. > > It's probably unfortunate that the choice was made to tolerate spaces in > things like > c 4. ~ > but I'm sure that that cannot be undone at this point. > > Increasing the number of different argument types for music functions > would almost certainly be extremely useful for users, who, judging from > this mailing list, seem to have an unlimited imagination when it comes to > wanting to be able to extend LP syntax. > > Since recognizing a duration expression is purely a notational problem > (in the sense that a notation has to be found that will be unambiguous for > the parser), it might be worth asking for people's ideas. The things I > can think of offhand are the following -- > > \foo c (4.) % no good -- confusion with slurs > \foo c \nul 4. % \nul would be a sort of syntactic "breath mark" > \foo c \ 4. % \ -- same idea as \nul (short, but maybe risky?) > \foo c \\ 4. % \\ -- same as \nul > \foo c =4. % = prefixed to any expression: "this is separate item" > > -- Tom > > > > _______________________________________________ > lilypond-user mailing list > lilypond-user@gnu.org > http://lists.gnu.org/mailman/listinfo/lilypond-user > _______________________________________________ lilypond-user mailing list lilypond-user@gnu.org http://lists.gnu.org/mailman/listinfo/lilypond-user
