%% Generated by lilypond-book
%% Options: [exampleindent=10.16\mm,indent=0\mm,line-width=160\mm,paper-height=845.047\pt,paper-width=597.508\pt,papersize='(cons (* 597.508 pt) (* 845.047 pt))]
\include "lilypond-book-preamble.ly"


% ****************************************************************
% Start cut-&-pastable-section
% ****************************************************************

#(ly:set-option 'eps-box-padding 3.000000)



\paper {
  #(set-paper-size '(cons (* 597.508 pt) (* 845.047 pt)))
  indent = 0\mm
  line-width = 160\mm
  % offset the left padding, also add 1mm as lilypond creates cropped
  % images with a little space on the right
  line-width = #(- line-width (* mm  3.000000) (* mm 1))
}

\layout {
  
}




% ****************************************************************
% ly snippet:
% ****************************************************************
\sourcefilename "/lilypond-2.26.0/input/regression/optional-args.ly"
\sourcefileline 0
\version "2.19.22"

\header{
  texidoc= "Test optional music function arguments.
The output is nonsensical, but if you wrack your brain,
you'll figure it out.  Remember that optional arguments
are matched left to right, and after the first non-match,
the rest is skipped."
}

\layout { ragged-right = ##t }

% Just like \relative, but defaulting to f as reference, making the
% first note of the music the same as if written as absolute pitch
ablative =
#(define-music-function (ref music)
  ((ly:pitch? #{ f #}) ly:music?)
  #{ \relative $ref $music #})

% Let's take a duration and four pitches, defaulting to 2 c' d' e'
zap = 
#(define-music-function (dur a b c d)
  ((ly:duration? #{ 2 #}) (ly:pitch? #{ c' #})
   (ly:pitch? #{ d' #}) (ly:pitch? #{ e' #})
   ly:music?) #{ $a $dur $b $c ^\markup{!} $d  #})

\new Voice { \relative c' e' \relative { e'' } \ablative c' e' \ablative { e' }
  \zap 8. c'' d'' {e''4..} \zap f''8 g'' \zap 4 a'' b'' c''' d'''2 }



% ****************************************************************
% end ly snippet
% ****************************************************************