src/HOL/Import/hol4rews.ML
changeset 32740 9dd0a2f83429
parent 32432 64f30bdd3ba1
child 32957 675c0c7e6a37
     1.1 --- a/src/HOL/Import/hol4rews.ML	Tue Sep 29 14:59:24 2009 +0200
     1.2 +++ b/src/HOL/Import/hol4rews.ML	Tue Sep 29 16:24:36 2009 +0200
     1.3 @@ -168,7 +168,7 @@
     1.4    fun merge _ = Library.gen_union Thm.eq_thm
     1.5  )
     1.6  
     1.7 -val hol4_debug = ref false
     1.8 +val hol4_debug = Unsynchronized.ref false
     1.9  fun message s = if !hol4_debug then writeln s else ()
    1.10  
    1.11  local