lily/music-function-scheme.cc

   1 #include "music-function.hh"
   2
   3 LY_DEFINE (ly_music_function_p, "ly:music-function?", 1, 0, 0,
   4            (SCM x),
   5            "Is @var{x} a @code{music-function}?")
   6 {
   7   return is_music_function (x) ? SCM_BOOL_T : SCM_BOOL_F;
   8 }
   9
  10 LY_DEFINE (ly_music_function_extract, "ly:music-function-extract", 1, 0, 0,
  11            (SCM x),
  12            "Return the Scheme function inside@tie{}@var{x}.")
  13 {
  14   LY_ASSERT_TYPE (is_music_function, x, 1);
  15
  16   return SCM_CELL_OBJECT_1(x);
  17 }
  18
  19 LY_DEFINE (ly_make_music_function, "ly:make-music-function", 2, 0, 0,
  20            (SCM signature, SCM func),
  21            "Make a function to process music, to be used for the"
  22            " parser.  @code{func} is the function, and @code{signature}"
  23            " describes its arguments.  @code{signature} is a list"
  24            " containing either @code{ly:music?} predicates or other type"
  25            " predicates.")
  26 {
  27   LY_ASSERT_TYPE (ly_is_procedure, func, 1);
  28   return  make_music_function (signature, func);
  29 }
  30