--- /dev/null
+/** @file exam_relational.cpp
+ *
+ * Small test for the relational objects and their conversion to bool. */
+
+/*
+ * GiNaC Copyright (C) 1999-2021 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "ginac.h"
+using namespace GiNaC;
+
+#include <iostream>
+using namespace std;
+
+// Elementary relations should fall back to numeric comparisons.
+static unsigned exam_relational_elementary()
+{
+ unsigned result = 0;
+ ex one = 1, two = 2;
+
+ if (one == two) {
+ clog << "'" << one << " == " << two << "' was converted to true." << endl;
+ result += 1;
+ }
+ if (!(one != two)) {
+ clog << "'" << one << " != " << two << "' was not converted to true." << endl;
+ result += 1;
+ }
+ if (!(one < two)) {
+ clog << "'" << one << " < " << two << "' was not converted to true." << endl;
+ result += 1;
+ }
+ if (!(one <= two)) {
+ clog << "'" << one << " <= " << two << "' was not converted to true." << endl;
+ result += 1;
+ }
+ if (one > two) {
+ clog << "'" << one << " > " << two << "' was converted to true." << endl;
+ result += 1;
+ }
+ if (one >= two) {
+ clog << "'" << one << " >= " << two << "' was converted to true." << endl;
+ result += 1;
+ }
+
+ return result;
+}
+
+// These should fall back to looking up info flags.
+static unsigned exam_relational_possymbol()
+{
+ unsigned result = 0;
+ possymbol p("p");
+
+ if (p == 0) {
+ clog << "for positive p, 'p == 0' was converted to true." << endl;
+ result += 1;
+ }
+ if (!(p != 0)) {
+ clog << "for positive p, 'p != 0' was not converted to true." << endl;
+ result += 1;
+ }
+ if (p < 0) {
+ clog << "for positive p, 'p < 0' was converted to true." << endl;
+ result += 1;
+ }
+ if (p <= 0) {
+ clog << "for positive p, 'p <= 0' was converted to true." << endl;
+ result += 1;
+ }
+ if (!(p > 0)) {
+ clog << "for positive p, 'p > 0' was not converted to true." << endl;
+ result += 1;
+ }
+ if (!(p >= 0)) {
+ clog << "for positive p, 'p >= 0' was not converted to true." << endl;
+ result += 1;
+ }
+
+ return result;
+}
+
+// Very simple arithmetic should be supported, too.
+static unsigned exam_relational_arith()
+{
+ unsigned result = 0;
+ possymbol p("p");
+
+ if (!(p + 2 > p + 1)) {
+ clog << "for positive p, 'p + 2 > p + 1' was not converted to true." << endl;
+ result += 1;
+ }
+ if (!(p > -p)) {
+ clog << "for positive p, 'p > -p' was not converted to true." << endl;
+ result += 1;
+ }
+ if (!(2*p > p)) {
+ clog << "for positive p, '2*p > p' was not converted to true." << endl;
+ result += 1;
+ }
+
+ return result;
+}
+
+unsigned exam_relational()
+{
+ unsigned result = 0;
+
+ cout << "examining relational objects" << flush;
+
+ result += exam_relational_elementary(); cout << '.' << flush;
+ result += exam_relational_possymbol(); cout << '.' << flush;
+ result += exam_relational_arith(); cout << '.' << flush;
+
+ return result;
+}
+
+int main(int argc, char** argv)
+{
+ return exam_relational();
+}