Datatype package now handles arbitrarily branching datatypes.
authorberghofe
Mon, 19 Jul 1999 17:21:40 +0200
changeset 7047d103b875ef1d
parent 7046 9f755ff43cff
child 7048 3535eec33c50
Datatype package now handles arbitrarily branching datatypes.
NEWS
     1.1 --- a/NEWS	Mon Jul 19 17:08:05 1999 +0200
     1.2 +++ b/NEWS	Mon Jul 19 17:21:40 1999 +0200
     1.3 @@ -120,6 +120,11 @@
     1.4  temporal levels more uniformly; introduces INCOMPATIBILITIES due to
     1.5  changed syntax and (many) tactics;
     1.6  
     1.7 +* HOL/datatype: Now also handles arbitrarily branching datatypes
     1.8 +  (using function types) such as
     1.9 +
    1.10 +  datatype 'a tree = Atom 'a | Branch "nat => 'a tree"
    1.11 +
    1.12  * HOL/typedef: fixed type inference for representing set; type
    1.13  arguments now have to occur explicitly on the rhs as type constraints;
    1.14