(sorry for spamming but I forgot to do "reply all" and post to the list itself)
An essay by Erik Sandberg had confused me (at closer look I was only confused not that the thesis was confusing), the word I should be using is not ast but music streams. Reading an older thread: http://lilypond.1069038.n5.nabble.com/Has-anything-been- done-about-implementing-music-streams-td108258.html and lack of documentation http://lilypond.org/doc/v2.18/Documentation/extending/ lilypond-scheme-interfaces I assume this is going to be more low level than I can play with at my low skill-level. (until docs and interfaces for scheme are more cleared up). thanks for your quick replies! 2017-07-20 17:33 GMT+02:00 David Kastrup <d...@gnu.org>: > Hlöðver Sigurðsson <hlo...@gmail.com> writes: > > > Yes, that's why I wanted to experiment with boycutting the > .ly->scheme-ast > > transformation step. I'm a much better lisper than c, so it's bit unclear > > to me what's going on (i've done parsers tough in the past). Are these > > public functions here maybe what I'm after > > https://github.com/lilypond/lilypond/blob/master/lily/ > include/lily-guile.hh#L52-L53 > > because, only by (maybe false) assumption, the lilypond lexer and > parser's > > job is to create the scheme ast in the pipeline that gets sent to another > > compilation step which job is to create raw typesetted output? > > I repeat: > > > 2017-07-20 16:57 GMT+02:00 David Kastrup <d...@gnu.org>: > >> > >> LilyPond is an interpreter, not a compiler, so it doesn't work with > >> parse trees. See lily/parser.yy for its parser (and associated actions) > >> and lily/lexer.ll for its lexer. > > There is no "scheme ast". LilyPond executes its actions as soon as it > recognizes a production. Those actions ultimately assemble "book" > expressions which are then processed with functions/hooks like > toplevel-book-handler . > > The basic control flow outside of the parser is done in ly/init.ly . > > -- > David Kastrup >
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