[Assorted-commits] SF.net SVN: assorted:[1357] sandbox/trunk/src/cc/default_equality.cc

[<yan...@us...>]

Revision: 1357
          http://assorted.svn.sourceforge.net/assorted/?rev=1357&view=rev
Author:   yangzhang
Date:     2009-04-29 20:45:50 +0000 (Wed, 29 Apr 2009)

Log Message:
-----------
added demo of default equality operator (or lack thereof)

Added Paths:
-----------
    sandbox/trunk/src/cc/default_equality.cc

Added: sandbox/trunk/src/cc/default_equality.cc
===================================================================
--- sandbox/trunk/src/cc/default_equality.cc	                        (rev 0)
+++ sandbox/trunk/src/cc/default_equality.cc	2009-04-29 20:45:50 UTC (rev 1357)
@@ -0,0 +1,18 @@
+// Is there a default comparator? No!
+
+class s { public: char xs[40]; };
+class t { public: char xs[40]; bool operator==(const t &) { return true; } };
+
+int main() {
+  {
+    s a __attribute__((unused));
+    s b __attribute__((unused));
+    // Doesn't work:
+    // return a == b;
+  }
+  {
+    t a;
+    t b;
+    return a == b;
+  }
+}


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