- updated for class series->class pseries

[ginac.git] / check / differentiation.cpp

diff --git a/check/differentiation.cpp b/check/differentiation.cpp
index ece8bc376eb4ce9d70bb952d8afe2c517b218e57..5b5f12dc614af1506589a0356c7b9cdfd221ad44 100644 (file)
--- a/check/differentiation.cpp
+++ b/check/differentiation.cpp
@@ -3,7 +3,7 @@
  *  Tests for symbolic differentiation, including various functions. */
 
 /*
- *  GiNaC Copyright (C) 1999 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2000 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -261,8 +261,8 @@ static unsigned differentiation6(void)
     e = sin(x).series(x, 0, 8);
     d = cos(x).series(x, 0, 7);
     ed = e.diff(x);
-    ed = static_cast<series *>(ed.bp)->convert_to_poly();
-    d = static_cast<series *>(d.bp)->convert_to_poly();
+    ed = series_to_poly(ed);
+    d = series_to_poly(d);
     
     if ((ed - d).compare(ex(0)) != 0) {
         clog << "derivative of " << e << " by " << x << " returned "