;; parser <-> output hooks.
(define-public (collect-bookpart-for-book parser book-part)
- "Toplevel book-part handler"
+ "Toplevel book-part handler."
(define (add-bookpart book-part)
(ly:parser-define!
parser 'toplevel-bookparts
(score-handler (scorify-music music parser)))))
(define-public (collect-music-for-book parser music)
- "Top-level music handler"
+ "Top-level music handler."
(collect-music-aux (lambda (score)
(collect-scores-for-book parser score))
parser
music))
(define-public (collect-book-music-for-book parser book music)
- "Book music handler"
+ "Book music handler."
(collect-music-aux (lambda (score)
(ly:book-add-score! book score))
parser
music))
(define-public (scorify-music music parser)
- "Preprocess MUSIC."
+ "Preprocess @var{music}."
(for-each (lambda (func)
(set! music (func music parser)))
(map-alist-keys func (cdr list)))))
(define-public (first-member members lst)
- "Return first successful MEMBER of member from MEMBERS in LST."
+ "Return first successful member (of member) from @var{members} in
+@var{lst}."
(if (null? members)
#f
(let ((m (member (car members) lst)))
(if m m (first-member (cdr members) lst)))))
(define-public (first-assoc keys lst)
- "Return first successful ASSOC of key from KEYS in LST."
+ "Return first successful assoc of key from @var{keys} in @var{lst}."
(if (null? keys)
#f
(let ((k (assoc (car keys) lst)))
(assoc-crawler key '() alist))
(define-public (map-selected-alist-keys function keys alist)
- "Returns alist with function applied to all of the values in list keys.
- For example:
- @code{guile> (map-selected-alist-keys - '(a b) '((a . 1) (b . -2) (c . 3) (d . 4)))}
- @code{((a . -1) (b . 2) (c . 3) (d . 4))}"
+ "Return @var{alist} with @var{function} applied to all of the values
+in list @var{keys}.
+
+For example:
+@example
+@code{guile> (map-selected-alist-keys - '(a b) '((a . 1) (b . -2) (c . 3) (d . 4)))}
+@code{((a . -1) (b . 2) (c . 3) (d . 4)}
+@end example"
(define (map-selected-alist-keys-helper function key alist)
(map
(lambda (pair)
(helper lst 0))
(define-public (count-list lst)
- "Given lst (E1 E2 .. ), return ((E1 . 1) (E2 . 2) ... )."
+ "Given @var{lst} as @code{(E1 E2 .. )}, return
+@code{((E1 . 1) (E2 . 2) ... )}."
(define (helper l acc count)
(if (pair? l)
(reverse (helper lst '() 1)))
(define-public (list-join lst intermediate)
- "put INTERMEDIATE between all elts of LST."
+ "Put @var{intermediate} between all elts of @var{lst}."
(fold-right
(lambda (elem prev)
(lset-difference eq? a b))
(define-public (uniq-list lst)
- "Uniq LST, assuming that it is sorted. Uses equal? for comparisons."
+ "Uniq @var{lst}, assuming that it is sorted. Uses @code{equal?}
+for comparisons."
(reverse!
(fold (lambda (x acc)
(list lst)))))
(define-public (split-list-by-separator lst pred)
- "Split LST at each element that satisfies PRED, and return the parts
- (with the separators removed) as a list of lists. Example:
- (split-list-by-separator '(a 0 b c 1 d) number?) ==> ((a) (b c) (d))"
+ "Split @var{lst} at each element that satisfies @var{pred}, and return
+the parts (with the separators removed) as a list of lists. For example,
+executing @samp{(split-list-by-separator '(a 0 b c 1 d) number?)} returns
+@samp{((a) (b c) (d))}."
(let loop ((result '()) (lst lst))
(if (and lst (not (null? lst)))
(loop
(cons (- expr) expr))
(define-public (interval-length x)
- "Length of the number-pair X, when an interval"
+ "Length of the number-pair @var{x}, if an interval."
(max 0 (- (cdr x) (car x))))
(define-public (ordered-cons a b)
((if (= dir RIGHT) cdr car) interval))
(define-public (interval-index interval dir)
- "Interpolate INTERVAL between between left (DIR=-1) and right (DIR=+1)"
+ "Interpolate @var{interval} between between left (@var{dir}=-1) and
+right (@var{dir}=+1)."
(* (+ (interval-start interval) (interval-end interval)
(* dir (- (interval-end interval) (interval-start interval))))
0.5))
(define-public (interval-center x)
- "Center the number-pair X, when an interval"
+ "Center the number-pair @var{x}, if an interval."
(if (interval-empty? x)
0.0
(/ (+ (car x) (cdr x)) 2)))
(define-public THREE-PI-OVER-TWO (* 3 PI-OVER-TWO))
(define-public (cyclic-base-value value cycle)
- "Takes a value and modulo-maps it between 0 and base."
+ "Take @var{value} and modulo-maps it between 0 and base @var{cycle}."
(if (< value 0)
(cyclic-base-value (+ value cycle) cycle)
(if (>= value cycle)
value)))
(define-public (angle-0-2pi angle)
- "Takes an angle in radians and maps it between 0 and 2pi."
+ "Take @var{angle} (in radians) and maps it between 0 and 2pi."
(cyclic-base-value angle TWO-PI))
(define-public (angle-0-360 angle)
- "Takes an angle in radians and maps it between 0 and 2pi."
+ "Take @var{angle} (in degrees) and maps it between 0 and 360 degrees."
(cyclic-base-value angle 360.0))
(define-public PI-OVER-180 (/ PI 180))
(define-public (degrees->radians angle-degrees)
- "Convert the given angle from degrees to radians"
+ "Convert the given angle from degrees to radians."
(* angle-degrees PI-OVER-180))
(define-public (ellipse-radius x-radius y-radius angle)
(* (sin angle) (sin angle)))))))
(define-public (polar->rectangular radius angle-in-degrees)
- "Convert polar coordinate @code{radius} and @code{angle-in-degrees}
- to (x-length . y-length)"
+ "Return polar coordinates (@var{radius}, @var{angle-in-degrees})
+as rectangular coordinates @ode{(x-length . y-length)}."
+
(let ((complex (make-polar
radius
(degrees->radians angle-in-degrees))))
(ly:number->string (cdr c))))
(define-public (dir-basename file . rest)
- "Strip suffixes in REST, but leave directory component for FILE."
+ "Strip suffixes in @var{rest}, but leave directory component for
+@var{file}."
(define (inverse-basename x y) (basename y x))
(simple-format #f "~a/~a" (dirname file)
(fold inverse-basename file rest)))
(define-public (write-me message x)
- "Return X. Display MESSAGE and write X. Handy for debugging,
-possibly turned off."
+ "Return @var{x}. Display @var{message} and write @var{x}.
+Handy for debugging, possibly turned off."
(display message) (write x) (newline) x)
;; x)
(cons (f (car x)) (f (cdr x))))
(define-public (list-insert-separator lst between)
- "Create new list, inserting BETWEEN between elements of LIST"
+ "Create new list, inserting @var{between} between elements of @var{lst}."
(define (conc x y )
(if (eq? y #f)
(list x)
(define-public (binary-search start end getter target-val)
(_i "Find the index between @var{start} and @var{end} (an integer)
-which will produce the closest match to @var{target-val} when
+which produces the closest match to @var{target-val} if
applied to function @var{getter}.")
(if (<= end start)
start
(string<? (symbol->string (car lst)) (symbol->string (car r))))
(define-public (eval-carefully symbol module . default)
- "Check if all symbols in expr SYMBOL are reachable
-in module MODULE. In that case evaluate, otherwise
-print a warning and set an optional DEFAULT."
+ "Check whether all symbols in expr @var{symbol} are reachable
+in module @var{module}. In that case evaluate, otherwise
+print a warning and set an optional @var{default}."
(let* ((unavailable? (lambda (sym)
(not (module-defined? module sym))))
(sym-unavailable (if (pair? symbol)
projects / lilypond.git / blobdiff