2014-11-02 wenzelm 2014-11-02 modernized header;
2014-09-09 blanchet 2014-09-09 more porting to new datatypes
2013-12-14 wenzelm 2013-12-14 proper context for basic Simplifier operations: rewrite_rule, rewrite_goals_rule, rewrite_goals_tac etc.; clarified tool context in some boundary cases;
2013-04-18 wenzelm 2013-04-18 simplifier uses proper Proof.context instead of historic type simpset;
2011-11-23 wenzelm 2011-11-23 modernized some old-style infix operations, which were left over from the time of ML proof scripts;
2011-03-29 wenzelm 2011-03-29 tuned headers;
2011-01-08 huffman 2011-01-08 types -> type_synonym
2010-11-27 huffman 2010-11-27 moved directory src/HOLCF to src/HOL/HOLCF; added HOLCF theories to src/HOL/IsaMakefile;