documentation update

[ginac.git] / check / exam_misc.cpp

diff --git a/check/exam_misc.cpp b/check/exam_misc.cpp
index 17101bc5fcb2370983be434283e7f3706b4a5d9e..849dc5adabd666ba1009e68ca18922fe926bc06b 100644 (file)
--- a/check/exam_misc.cpp
+++ b/check/exam_misc.cpp
@@ -3,7 +3,7 @@
  */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 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
@@ -191,7 +191,7 @@ static unsigned exam_operator_semantics(void)
        // (which incidentally was severely broken from version 0.7.3 to 0.8.2).
        ex selfprobe = numeric("65536");
        selfprobe = selfprobe;
-       if (!is_ex_exactly_of_type(selfprobe, numeric)) {
+       if (!is_exactly_a<numeric>(selfprobe)) {
                clog << "ex (of numeric) after self-assignment became " << selfprobe << endl;
                ++result;
        }
@@ -199,6 +199,33 @@ static unsigned exam_operator_semantics(void)
        return result;
 }
 
+/* This checks whether subs() works as intended in some special cases. */
+static unsigned exam_subs(void)
+{
+       unsigned result = 0;
+       symbol x("x");
+       ex e1, e2;
+
+       // This used to fail in GiNaC 1.0.5 because it first substituted
+       // x+1 -> (x-1)+1 -> x, and then substituted again x -> x-1, giving
+       // the wrong result
+       e1 = x+1;
+       e2 = e1.subs(x == x-1);
+       if (!e2.is_equal(x)) {
+               clog << "(x+1).subs(x==x-1) erroneously returned " << e2 << " instead of x" << endl;
+               ++result;
+       }
+
+       e1 = sin(1+sin(x));
+       e2 = e1.subs(sin(wild()) == cos(wild()));
+       if (!e2.is_equal(cos(1+cos(x)))) {
+               clog << "sin(1+sin(x)).subs(sin($1)==cos($1)) erroneously returned " << e2 << " instead of cos(1+cos(x))" << endl;
+               ++result;
+       }
+
+       return result;
+}
+
 unsigned exam_misc(void)
 {
        unsigned result = 0;
@@ -211,6 +238,7 @@ unsigned exam_misc(void)
        result += exam_expand_power(); cout << '.' << flush;
        result += exam_sqrfree(); cout << '.' << flush;
        result += exam_operator_semantics(); cout << '.' << flush;
+       result += exam_subs(); cout << '.' << flush;
        
        if (!result) {
                cout << " passed " << endl;