wenzelm [Mon, 13 Mar 2000 13:34:09 +0100] rev 8440
* HOL: exhaust_tac on datatypes superceded by new case_tac;
* ML: PureThy.add_thms/add_axioms/add_defs now return theorems;
* Isar/Pure: much better support for case-analysis;
* ML: new combinators |>> and |>>>