*/
/*
- * GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
+ * GiNaC Copyright (C) 1999-2003 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
return result;
}
+/* Joris van der Hoeven (he of TeXmacs fame) is a funny guy. He has his own
+ * ideas what a symbolic system should do. Let's make sure we won't disappoint
+ * him some day. Incidentally, this seems to always have worked. */
+static unsigned exam_joris(void)
+{
+ unsigned result = 0;
+ symbol x("x");
+
+ ex e = expand(pow(x, x-1) * x);
+ if (e != pow(x, x)) {
+ clog << "x^(x-1)*x did not expand to x^x. Please call Joris!" << endl;
+ ++result;
+ }
+
+ return result;
+}
+
+/* Test Chris Dams' algebraic substitutions. */
+static unsigned exam_subs_algebraic()
+{
+ unsigned result = 0;
+ symbol x("x"), y("y");
+
+ ex e = ex(x*x*x*y*y).subs(x*y==2, subs_options::subs_algebraic);
+ if (e != 4*x) {
+ clog << "(x^3*y^2).subs(x*y==2,subs_options::subs_algebraic) erroneously returned " << e << endl;
+ ++result;
+ }
+
+ e = ex(x*x*x*x*x).subs(x*x==y, subs_options::subs_algebraic);
+ if (e != y*y*x) {
+ clog << "x^5.subs(x^2==y,subs_options::subs_algebraic) erroneously returned " << e << endl;
+ ++result;
+ }
+
+ return result;
+}
+
unsigned exam_misc(void)
{
unsigned result = 0;
result += exam_sqrfree(); cout << '.' << flush;
result += exam_operator_semantics(); cout << '.' << flush;
result += exam_subs(); cout << '.' << flush;
+ result += exam_joris(); cout << '.' << flush;
+ result += exam_subs_algebraic(); cout << '.' << flush;
if (!result) {
cout << " passed " << endl;