input/regression/apply-context.ly

   1
   2 \version "2.12.0"
   3
   4
   5 \header {
   6
   7 texidoc = "With @code{\\applyContext}, @code{\\properties} can be modified
   8 procedurally. Applications include: checking bar numbers, smart
   9 octavation.
  10
  11
  12 This example prints a bar-number during processing on stdout.
  13 "
  14
  15 }
  16
  17 \layout { ragged-right= ##t }
  18
  19
  20 \relative c'' {
  21   c1 c1
  22
  23   %% todo: should put something interesting in the .tex output.
  24
  25   \applyContext
  26   #(lambda (tr)
  27     (ly:progress "\nWe were called in bar number ~a.\n"
  28      (ly:context-property tr 'currentBarNumber)))
  29   c1 c1
  30 }