changeset 20854 | f9cf9e62d11c |
parent 20344 | d02b43ea722e |
--- a/src/Provers/ind.ML Wed Oct 04 14:14:33 2006 +0200 +++ b/src/Provers/ind.ML Wed Oct 04 14:17:38 2006 +0200 @@ -28,7 +28,7 @@ fun add_term_frees thy = let fun add(tm, vars) = case tm of - Free(v,T) => if Sign.typ_instance thy (T,aT) then v ins vars + Free(v,T) => if Sign.typ_instance thy (T,aT) then insert (op =) v vars else vars | Abs (_,_,body) => add(body,vars) | rator$rand => add(rator, add(rand, vars))