--- a/src/HOL/Quickcheck.thy Thu May 21 09:07:13 2009 +0200
+++ b/src/HOL/Quickcheck.thy Thu May 21 09:07:25 2009 +0200
@@ -175,6 +175,60 @@
end
+subsection {* Type copies *}
+
+setup {*
+let
+
+fun mk_random_typecopy tyco vs constr typ thy =
+ let
+ val Ts = map TFree vs;
+ val T = Type (tyco, Ts);
+ fun mk_termifyT T = HOLogic.mk_prodT (T, @{typ "unit \<Rightarrow> term"})
+ val Ttm = mk_termifyT T;
+ val typtm = mk_termifyT typ;
+ fun mk_const c Ts = Const (c, Sign.const_instance thy (c, Ts));
+ fun mk_random T = mk_const @{const_name random} [T];
+ val size = @{term "k\<Colon>code_numeral"};
+ val v = "x";
+ val t_v = Free (v, typtm);
+ val t_constr = mk_const constr Ts;
+ val lhs = mk_random T $ size;
+ val rhs = HOLogic.mk_ST [(((mk_random typ) $ size, @{typ Random.seed}), SOME (v, typtm))]
+ (HOLogic.mk_return Ttm @{typ Random.seed}
+ (mk_const "Code_Eval.valapp" [typ, T]
+ $ HOLogic.mk_prod (t_constr, Abs ("u", @{typ unit}, HOLogic.reflect_term t_constr)) $ t_v))
+ @{typ Random.seed} (SOME Ttm, @{typ Random.seed});
+ val eq = HOLogic.mk_Trueprop (HOLogic.mk_eq (lhs, rhs));
+ in
+ thy
+ |> TheoryTarget.instantiation ([tyco], vs, @{sort random})
+ |> `(fn lthy => Syntax.check_term lthy eq)
+ |-> (fn eq => Specification.definition (NONE, (Attrib.empty_binding, eq)))
+ |> snd
+ |> Class.prove_instantiation_exit (K (Class.intro_classes_tac []))
+ end;
+
+fun ensure_random_typecopy tyco thy =
+ let
+ val SOME { vs = raw_vs, constr, typ = raw_typ, ... } =
+ TypecopyPackage.get_info thy tyco;
+ val constrain = curry (Sorts.inter_sort (Sign.classes_of thy));
+ val typ = map_atyps (fn TFree (v, sort) =>
+ TFree (v, constrain sort @{sort random})) raw_typ;
+ val vs' = Term.add_tfreesT typ [];
+ val vs = map (fn (v, sort) =>
+ (v, the_default (constrain sort @{sort typerep}) (AList.lookup (op =) vs' v))) raw_vs;
+ val do_inst = Sign.of_sort thy (typ, @{sort random});
+ in if do_inst then mk_random_typecopy tyco vs constr typ thy else thy end;
+
+in
+
+TypecopyPackage.interpretation ensure_random_typecopy
+
+end
+*}
+
no_notation fcomp (infixl "o>" 60)
no_notation scomp (infixl "o\<rightarrow>" 60)