LilyPond Internals Reference: 1.1.39 GraceMusic

### 1.1.39 `GraceMusic`

Interpret the argument as grace notes.

Properties:

`iterator-ctor` (procedure):

  `ly:grace-iterator::constructor`

  Function to construct a `music-event-iterator` object for this music.

`length` (moment):

  `#<Mom 0>`

  The endpoint of this music. This property is unhappily named in that it does not account for any initial grace notes: the full length of the music is `length` minus the start time. A value of `INF-MOMENT` indicates indefinite length.

`name` (symbol):

  `'GraceMusic`

  Name of this music object.

`start-callback` (procedure):

  `ly:grace-music::start-callback`

  Function to compute the negative length of starting grace notes. This property can only be defined as initializer in ‘`scm/define-music-types.scm`’.

`types` (list):

      '(grace-music music-wrapper-music)

  The types of this music object; determines by what engraver this music expression is processed.

#### LilyPond – Internals Reference v2.24.4 (stable-branch).