added test for structure<> template

[ginac.git] / check / exam_structure.cpp

diff --git a/check/exam_structure.cpp b/check/exam_structure.cpp
new file mode 100644 (file)
index 0000000..044de03
--- /dev/null
+++ b/check/exam_structure.cpp
@@ -0,0 +1,100 @@
+/** @file exam_structure.cpp
+ *
+ *  Small test for the structure<> template. */
+
+/*
+ *  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
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "exams.h"
+
+
+struct sprod_s {
+       ex left, right;
+
+       sprod_s() {}
+       sprod_s(const ex & l, const ex & r) : left(l), right(r) {}
+};
+
+inline bool operator==(const sprod_s & lhs, const sprod_s & rhs)
+{
+       return lhs.left.is_equal(rhs.left) && lhs.right.is_equal(rhs.right);
+}
+     
+inline bool operator<(const sprod_s & lhs, const sprod_s & rhs)
+{
+       return lhs.left.compare(rhs.left) < 0 ? true : lhs.right.compare(rhs.right) < 0;
+}
+
+typedef structure<sprod_s, compare_std_less> sprod;
+
+inline ex make_sprod(const ex & l, const ex & r)
+{
+       return sprod(sprod_s(l, r));
+}
+
+void sprod::print(const print_context & c, unsigned level) const
+{
+       const sprod_s & sp = get_struct();
+       c.s << "<" << sp.left << "|" << sp.right << ">";
+}
+
+ex sprod::eval(int level) const
+{
+       // symmetric scalar product
+       const sprod_s & sp = get_struct();
+       if (sp.left.compare(sp.right) <= 0)
+               return hold();
+       else
+               return make_sprod(sp.right, sp.left);
+}
+
+unsigned exam_structure()
+{
+       unsigned result = 0;
+
+       cout << "examining structure template" << flush;
+       clog << "----------structure template:" << endl;
+
+       symbol x("x"), y("y");
+       ex e;
+
+       e = make_sprod(x, y) - make_sprod(y, x);
+       if (!e.is_zero()) {
+               clog << "<x|y>-<y|x> erroneously returned " << e << " instead of 0" << endl;
+               ++result;
+       }
+
+       cout << '.' << flush;
+
+       e = make_sprod(x, x) - make_sprod(y, y);
+       if (e.is_zero()) {
+               clog << "<x|x>-<y|y> erroneously returned 0" << endl;
+               ++result;
+       }
+
+       cout << '.' << flush;
+
+       if (!result) {
+               cout << " passed " << endl;
+               clog << "(no output)" << endl;
+       } else {
+               cout << " failed " << endl;
+       }
+
+       return result;
+}