info_flags::integer and -::cinteger work similarly, the same
holds for types like info_flags::rational_polynomial.
-0.5.0 (?? February 2000)
+0.5.0 (7 February 2000)
* Expressions can be written ("archived") to files and read therefrom.
* Addition of GiNaC-cint, which lets you write complete programs in
an interactive shell-like manner in your favoured programming