* only show user-visible changes.
@end ignore
+
+@item
+Use of @code{\tempo} specifications in @code{\midi} blocks (removed in
+2.9.16 in favor of explicit @code{tempoWholesPerMinute} settings) has
+seen a revival: now any kind of property-setting music is turned into
+context definitions within of output specifications, allowing for
+declarations like
+@example
+\layout @{ \accidentalStyle modern @}
+\midi @{ \tempo 4. = 66 @}
+@end example
+
+@item
+The LilyPond G clef has been redesigned - upper loop is now more balanced,
+bottom crook sticks out less and the "spine" (main vertical line) is more
+evenly curved. The old and new versions can be compared by looking at the
+documentation:
+@uref{http://lilypond.org/doc/v2.14/Documentation/notation/the-feta-font.html#clef-glyphs, old version},
+@uref{http://lilypond.org/doc/v2.15/Documentation/notation/the-feta-font.html#clef-glyphs, new version}.
+
+@item
+Lilypond's stencil commands have been simplified to allow for less code
+duplication and better height approximations of graphical objects. The
+following stencil commands have been eliminated:
+@itemize
+@item @code{beam}
+@item @code{bezier-sandwich}
+@item @code{bracket}
+@item @code{dashed-slur}
+@item @code{dot}
+@item @code{oval}
+@item @code{repeat-slash}
+@item @code{zigzag-line}
+@end itemize
+
+@item
+Flags are now treated as separate objects rather than as stem parts.
+@lilypond[fragment,quote,relative=2]
+\override Flag #'color = #red
+g8
+@end lilypond
+
+@item
+Two alternative methods for bar numbering can be set, especially for
+when using repeated music;
+
+@lilypond[fragment,quote,relative=1,noragged-right]
+\relative c'{
+ \set Score.alternativeNumberingStyle = #'numbers
+ \repeat volta 3 { c4 d e f | }
+ \alternative {
+ { c4 d e f | c2 d \break }
+ { f4 g a b | f4 g a b | f2 a | \break }
+ { c4 d e f | c2 d }
+ }
+ c1 \break
+ \set Score.alternativeNumberingStyle = #'numbers-with-letters
+ \repeat volta 3 { c,4 d e f | }
+ \alternative {
+ { c4 d e f | c2 d \break }
+ { f4 g a b | f4 g a b | f2 a | \break }
+ { c4 d e f | c2 d }
+ }
+ c1
+}
+@end lilypond
+
+@item
+The following is a fundamental change in LilyPond's music
+representation: Rhythmic events like @code{LyricEvent} and
+@code{NoteEvent} are no longer wrapped in @code{EventChord} unless they
+have been actually entered as part of a chord in the input. If you
+manipulate music expressions in Scheme, the new behavior may require
+changes in your code. Calling the music function @code{\eventChords} or
+the Scheme function @code{event-chord-wrap!} converts to the old
+representation; using one of those might be easiest for keeping legacy
+code operative.
+
+The following three items are consequences of this change.
+
+@item
+The repetitive chord entry aid @code{q} has been reimplemented.
+Repeated chords are now replaced right before interpreting a music
+expression. In case the user wants to retain some events of the
+original chord, he can run the repeat chord replacement function
+@code{\chordRepeats} manually.
+
+@item
+String numbers and right hand fingerings on single notes now appear
+without having to be written inside of chord brackets.
+
+@item
+Music functions now work the same when used inside or outside of chords,
+including all the possibilities of argument parsing. Music variables
+can be used inside of chords: a construct like
+@lilypond[verbatim,quote,ragged-right]
+tonic=fis'
+{ <\tonic \transpose c g \tonic> }
+@end lilypond
+@noindent
+now works as expected. One can use @code{#@{@dots{}#@}} for
+constructing chord constituents. @code{\tweak} now works on single
+notes without needing to wrap them in a chord. Using it on command
+events and lyrics is now possible, but not likely to give results yet.
+
+@item
+@code{\tweak} now takes an optional layout object specification. It can
+be used for tweaking layout objects that are only indirectly caused by
+the tweaked event, like accidentals, stems, and flags:
+
+@lilypond[verbatim,quote,ragged-right,relative=2]
+<\tweak Accidental #'color #red cis4
+ \tweak Accidental #'color #green es
+ g>
+@end lilypond
+
+@item
+Scheme expressions inside of embedded Lilypond (@code{#@{@dots{}#@}})
+are now executed in lexical closure of the surrounding Scheme code.
+@code{$} is no longer special in embedded Lilypond. It can be used
+unconditionally in Lilypond code for immediate evaluation, similar to
+how @code{ly:export} could previously be used. @code{ly:export} has
+been removed. As a consequence, @code{#} is now free to delay
+evaluation of its argument until the parser actually reduces the
+containing expression, greatly reducing the potential for premature
+evaluation.
+
+@item
+Support for jazz-like chords has been improved: Lydian and altered
+chords are recognised; separators between chord modifiers are now
+treated independently of separators between ``slash'' chords and their
+bass notes (and by default, slashes are now only used for the latter
+type of separator); additional pitches are no longer prefixed with
+``add'' by default; and the ``m'' in minor chords can be customized.
+@ruser{Customizing chord names} for more information.
+
+@item
+The @code{\markuplines} command has been renamed to @code{\markuplist}
+for a better match with its semantics and general Lilypond
+nomenclature.
+
+@item
+The interface for specifying string tunings in tablature has been
+simplified considerably and employs the scheme function
+@code{\stringTuning} for most purposes.
+
@item
Beams can now have their slopes preserved over line breaks.
@lilypond[fragment,quote,relative=2]
\override Beam #'breakable = ##t
-\override Beam #'consistent-broken-slope = ##t
+a8[ b c d e f g \bar "" \break f e d c b a]
+\once \override Beam #'positions = #beam::align-with-broken-parts
+a8[ b c d e f g \bar "" \break f e d c b a]
+\once \override Beam #'positions = #beam::slope-like-broken-parts
a8[ b c d e f g \bar "" \break f e d c b a]
@end lilypond
To do this, several callback functions are now deprecated.
@item @code{ly:beam::slope-damping}
@item @code{ly:beam::shift-region-to-valid}
@end itemize
-All of these functions are now automatically called via @code{ly:beam::quanting}.
-Furthermore, @code{ly:beam::quanting} now only takes one argument -
-the beam grob.
+Furthermore, @code{ly:beam::quanting} now takes an additional argument
+to help calculations over line breaks. All of these functions are now
+automatically called when setting the @code{positions} parameter.
+
+@item
+In function arguments music, markups and Scheme expressions (as well as
+several other syntactic entities) have become mostly interchangeable and
+are told apart only by evaluating the respective predicate. In several
+cases, the predicate is consulted by the parser, like when deciding
+whether to interpret @code{-3} as a number or a fingering event.
@item
-Music, event, and scheme functions can now be defined with optional
-arguments before mandatory arguments.
+Music functions (and their close relatives) can now be defined with
+optional arguments.
+
+@item
+For defining commands executed only for their side-effects,
+@code{define-void-function} is now available.
@item
There is a new @code{define-event-function} command in analogy to
@code{define-music-function} that can be used for defining music
-functions acting as events without requiring a direction specifier
+functions acting as post events without requiring a direction specifier
(@code{-}, @code{^}, or @code{_}) placed before them.
-@lilypond[quote,verbatim,raggedright]
+@lilypond[quote,verbatim,ragged-right]
dyn=#(define-event-function (parser location arg) (markup?)
(make-dynamic-script arg))
\relative c' { c\dyn pfsss }
@item
The construct @code{#@{ @dots{} #@}} can now be used not just for
-constructing sequential music lists, but also for single music events,
-void music expressions, post events, markups (mostly freeing users from
+constructing sequential music lists, but also for pitches (distinguished
+from single note events by the absence of a duration or other
+information that can't be part of a pitch), single music events, void
+music expressions, post events, markups (mostly freeing users from
having to use the @code{markup} macro), markup lists, number
expressions, context definitions and modifications, and a few other
things. If it encloses nothing or only a single music event, it no
longer returns a sequential music list but rather a void music
expression or just the music event itself, respectively.
+@item
+Pitches can be used on the right side of assignments. They are
+distinguished from single note events by the absence of a duration or
+other information that can't be part of a pitch.
+
@item
New command-line option @option{--loglevel=@var{level}} to control how much output
LilyPond creates. Possible values are ERROR, WARN, BASIC_PROGRESS, PROGRESS, DEBUG.
@item
-@code{\set \once} now correctly resets the property value to the previous value.
+@code{\once \set} now correctly resets the property value to the previous value.
@lilypond[fragment,quote,relative=2]
\set fingeringOrientations = #'(left)
<e-1>4
<e-1>-"left"
@end lilypond
-
@item
The alignment of dynamic spanners (hairpins, text crescendo, etc.) is now
automatically broken if a different direction is explicitly given.
@item
Appoggiaturas and acciaccaturas now also work inside a slur, not only inside
a phrasing slur. Also, a function @code{\slashedGrace} was added that does
-does not use a slur from the acciaccatura note.
+not use a slur from the acciaccatura note.
@lilypond[fragment,quote,relative=2]
c4( \appoggiatura e8 d4 \acciaccatura e8 d4 \slashedGrace e8 c4)
@end lilypond
projects / lilypond.git / blobdiff