X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fperformance-scheme.cc;h=a00e6b8efd13e52094c9f6f9ef5d006f4544dc9e;hb=92639219fbef60744ab4c0a3c605507c3a4e3037;hp=3f45829882b8b174e73f99bb077973333800850e;hpb=a276a19dc6bd57832db3107f2f2cbb04cb4677b6;p=lilypond.git

diff --git a/lily/performance-scheme.cc b/lily/performance-scheme.cc
index 3f45829882..a00e6b8efd 100644
--- a/lily/performance-scheme.cc
+++ b/lily/performance-scheme.cc
@@ -10,14 +10,12 @@
 
 LY_DEFINE (ly_performance_write, "ly:performance-write",
 	   2, 0, 0, (SCM performance, SCM filename),
-	   "Write @var{performance} to @var{filename}")
+	   "Write @var{performance} to @var{filename}.")
 {
-  Performance *perf = dynamic_cast<Performance *> (unsmob_music_output (performance));
+  LY_ASSERT_TYPE (unsmob_performance, performance, 1);
+  LY_ASSERT_TYPE (scm_is_string, filename, 2);
 
-  SCM_ASSERT_TYPE (perf, performance, SCM_ARG1, __FUNCTION__, "Performance");
-  SCM_ASSERT_TYPE (scm_is_string (filename), filename, SCM_ARG2, __FUNCTION__, "file name");
-
-  perf->write_output (ly_scm2string (filename));
+  unsmob_performance (performance)->write_output (ly_scm2string (filename));
   return SCM_UNSPECIFIED;
 }