Re: music function patch

[Han-Wen Nienhuys]

Erik Sandberg wrote:
> Hi,
>
> The attached patch cleans up music functions:
> - functions can have any arity, and parameters can be mixed in any way.
> - implementation: A music function generates a sequence of tokens, so e.g. a 
> (markup? music? scm?) function generates tokens MUSIC_FUNCTION EXPECT_SCM 
> EXPECT_MUSIC EXPECT_MARKUP. After that it's easy to write a grammar to parse 
> the argument list.
> - there is still a restriction on 'event functions': A function can only be 
> applied to a post-event or chord-element if the function has exactly one 
> music parameter, and if that parameter is last. If this rule is violated, 
> there will be confusing parser errors ("unexpected EXPECT_MUSIC") due my 
> implementation, but I also added an error message which describes the problem 
> in English.

This is very clever and extremely cool.

please apply!

--

Han-Wen Nienhuys - address@hidden - http://www.xs4all.nl/~hanwen

LilyPond Software Design
 -- Code for Music Notation
http://www.lilypond-design.com