2.1.1 Music function syntax

The general form for music functions is:

function =
#(define-music-function
     (parser location arg1 arg2 …)
     (type1? type2? …)
   music)

where

argN

nth argument

typeN?

a scheme type predicate for which argN must return #t.

music

A music expression, optionally written in scheme, with any LilyPond code enclosed in hashed braces ( #{…#} ). Within LilyPond code blocks, use $ to reference function arguments (eg., ‘$arg1’) or to start an inline scheme expression containing function arguments (eg., ‘$(cons arg1 arg2)’).

For a list of available type predicates, see Predefined type predicates. User-defined type predicates are also allowed.

See also

Notation Reference: Predefined type predicates.

Installed Files: ‘lily/music-scheme.cc’, ‘scm/c++.scm’, ‘scm/lily.scm’.


Más nyelvek: español.

LilyPond — Extending