| changeset 898 | 4f9c8503d1c5 |
| parent 776 | df8f91c0e57c |
| child 900 | 8e22076cd3ca |
--- a/src/Pure/thm.ML Tue Feb 07 17:36:48 1995 +0100 +++ b/src/Pure/thm.ML Wed Feb 08 11:30:00 1995 +0100 @@ -1056,6 +1056,7 @@ (*simple test for looping rewrite*) fun loops sign prems (lhs,rhs) = is_Var(lhs) orelse + (is_Free(lhs) andalso (lhs mem (foldr add_term_frees (prems,[])))) orelse (null(prems) andalso Pattern.matches (#tsig(Sign.rep_sg sign)) (lhs,rhs));