Added integer extension; added certain and possible comparisons; reworked some documentation; corrected some bugs; removing check_nan from strict checking

[SVN r18305]

test/integer.cpp

@@ -0,0 +1,26 @@
+/* Boost test/integer.cpp
+ * test int extension
+ *
+ * Copyright Guillaume Melquiond 2003
+ * Permission to use, copy, modify, sell, and distribute this software
+ * is hereby granted without fee provided that the above copyright notice
+ * appears in all copies and that both that copyright notice and this
+ * permission notice appear in supporting documentation.
+ *
+ * None of the above authors make any representation about the suitability
+ * of this software for any purpose. It is provided "as is" without express
+ * or implied warranty.
+ *
+ * $Id$
+ */
+
+#include <boost/numeric/interval.hpp>
+#include <boost/numeric/interval/ext/integer.hpp>
+
+typedef boost::numeric::interval<float> I;
+
+int main() {
+  I x, y;
+  x = 4 - (2 * y + 1) / 3;
+  return 0;
+}