(Announcement . (AnnounceNewContext))
))
-;; Maps event-class to a list of ancestors (inclusive)
-(define ancestor-lookup (make-hash-table 11))
+(define-public (event-class-cons class parent classlist)
+ (let ((lineage (assq parent classlist)))
+ (if (not lineage)
+ (begin
+ (if (not (null? parent))
+ (ly:warning (_ "unknown parent class `~a'") parent))
+ (set! lineage '())))
+ (if (symbol? class)
+ (acons class lineage classlist)
+ (fold (lambda (elt alist)
+ (acons elt lineage alist))
+ classlist class))))
;; Each class will be defined as
;; (class parent grandparent .. )
;; so that (eq? (cdr class) parent) holds.
-(for-each
- (lambda (rel)
- (for-each
- (lambda (type)
- (hashq-set! ancestor-lookup type
- (cons type (hashq-ref ancestor-lookup (car rel) '()))))
- (cdr rel)))
- event-classes)
-
-(define-public (define-event-class leaf heritage)
- (cond
- ((not (eq? leaf (car heritage)))
- (ly:warning (_ "All classes must be the last in their matrilineal line.")))
- ((not (equal? (cdr heritage)
- (list-head (hashq-ref ancestor-lookup (cadr heritage) '())
- (length (cdr heritage)))))
- (ly:warning (_ "All classes must have a well-defined pedigree in the existing class hierarchy.")))
- (else (hashq-set! ancestor-lookup
- leaf
- (cons leaf
- (hashq-ref ancestor-lookup
- (cadr heritage)
- '())))))
- *unspecified*)
-
-;; TODO: Allow entering more complex classes, by taking unions.
-(define-public (ly:make-event-class leaf)
- (hashq-ref ancestor-lookup leaf))
(define-public (ly:in-event-class? ev cl)
"Does event @var{ev} belong to event class @var{cl}?"
- (memq cl (ly:make-event-class (ly:event-property ev 'class))))
+ (memq cl (ly:event-property ev 'class)))
+
+(define-public all-event-classes
+ (fold (lambda (elt classlist)
+ (event-class-cons (cdr elt) (car elt) classlist))
+ '() event-classes))
;; does this exist in guile already?
(define (map-tree f t)
(cons root (map expand-event-tree (cdr children)))
root)))
-;; All leaf event classes that no translator listens to
-;; directly. Avoids printing a warning.
-(define unlistened-music-event-classes
- '(harmonic-event line-break-event page-break-event page-turn-event label-event
- solo-one-event solo-two-event skip-event unisono-event
- part-combine-force-event break-dynamic-span-event
- stroke-finger-event))
-
;; produce neater representation of music event tree.
;; TODO: switch to this representation for the event-classes list?
(define music-event-tree (expand-event-tree 'music-event))
;;(use-modules (ice-9 pretty-print))
;;(pretty-print (cons (car music-event-tree) (sort-tree (cdr music-event-tree))))
-;; check that the music event tree corresponds well with the set of
-;; available translators; print warnings otherwise.
-(map-tree (lambda (sym)
- (if (and (symbol? sym)
- (not (ly:is-listened-event-class sym))
- (not (assq sym event-classes))
- (not (memq sym unlistened-music-event-classes)))
- (ly:programming-error (_ "event class ~A seems to be unused") sym)))
- music-event-tree)
-
-(map (lambda (sym)
- (if (not (pair? (ly:make-event-class sym)))
- ;; should be programming-error
- (ly:error (_ "translator listens to nonexisting event class ~A") sym)))
- (ly:get-listened-event-classes))
-
(defmacro-public make-stream-event (expr)
(Stream_event::undump (primitive-eval (list 'quasiquote expr))))