haftmann@31254
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(* Author: Florian Haftmann, TU Muenchen
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haftmann@31254
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haftmann@31254
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Quickcheck generators for various types.
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haftmann@31254
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*)
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haftmann@31254
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haftmann@31254
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signature QUICKCHECK_GENERATORS =
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haftmann@31254
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sig
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haftmann@31254
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type seed = Random_Engine.seed
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haftmann@31254
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val random_fun: typ -> typ -> ('a -> 'a -> bool) -> ('a -> term)
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haftmann@31254
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-> (seed -> ('b * (unit -> term)) * seed) -> (seed -> seed * seed)
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wenzelm@33259
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-> seed -> (('a -> 'b) * (unit -> term)) * seed
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haftmann@31254
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val ensure_random_typecopy: string -> theory -> theory
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haftmann@31867
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val random_aux_specification: string -> string -> term list -> local_theory -> local_theory
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haftmann@31737
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val mk_random_aux_eqs: theory -> Datatype.descr -> (string * sort) list
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haftmann@31603
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-> string list -> string list * string list -> typ list * typ list
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haftmann@31867
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-> term list * (term * term) list
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haftmann@31737
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val ensure_random_datatype: Datatype.config -> string list -> theory -> theory
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haftmann@31950
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val compile_generator_expr: theory -> term -> int -> term list option
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wenzelm@32740
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val eval_ref: (unit -> int -> seed -> term list option * seed) option Unsynchronized.ref
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haftmann@31254
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val setup: theory -> theory
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haftmann@31254
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end;
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haftmann@31254
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haftmann@31254
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structure Quickcheck_Generators : QUICKCHECK_GENERATORS =
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haftmann@31254
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struct
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haftmann@31254
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haftmann@31950
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(** abstract syntax **)
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haftmann@31254
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haftmann@31950
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fun termifyT T = HOLogic.mk_prodT (T, @{typ "unit => term"})
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haftmann@31950
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val size = @{term "i::code_numeral"};
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haftmann@31984
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val size_pred = @{term "(i::code_numeral) - 1"};
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haftmann@31950
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val size' = @{term "j::code_numeral"};
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haftmann@31950
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val seed = @{term "s::Random.seed"};
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haftmann@31254
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haftmann@31254
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haftmann@31254
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(** typ "'a => 'b" **)
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haftmann@31254
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haftmann@31254
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type seed = Random_Engine.seed;
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haftmann@31254
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haftmann@31603
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fun random_fun T1 T2 eq term_of random random_split seed =
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haftmann@31254
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let
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haftmann@31254
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val fun_upd = Const (@{const_name fun_upd},
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haftmann@31254
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(T1 --> T2) --> T1 --> T2 --> T1 --> T2);
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haftmann@32344
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val ((y, t2), seed') = random seed;
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haftmann@32344
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val (seed'', seed''') = random_split seed';
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haftmann@31932
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wenzelm@32740
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val state = Unsynchronized.ref (seed'', [], fn () => Abs ("x", T1, t2 ()));
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haftmann@31254
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fun random_fun' x =
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haftmann@31254
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let
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haftmann@31254
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val (seed, fun_map, f_t) = ! state;
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haftmann@31254
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in case AList.lookup (uncurry eq) fun_map x
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haftmann@31254
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of SOME y => y
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haftmann@31254
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| NONE => let
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haftmann@31254
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val t1 = term_of x;
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haftmann@31254
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val ((y, t2), seed') = random seed;
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haftmann@31254
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val fun_map' = (x, y) :: fun_map;
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haftmann@31932
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val f_t' = fn () => fun_upd $ f_t () $ t1 $ t2 ();
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haftmann@31254
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val _ = state := (seed', fun_map', f_t');
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haftmann@31254
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in y end
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haftmann@31254
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end;
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haftmann@31932
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fun term_fun' () = #3 (! state) ();
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haftmann@32344
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in ((random_fun', term_fun'), seed''') end;
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haftmann@31254
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haftmann@31254
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haftmann@31254
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(** type copies **)
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haftmann@31254
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haftmann@31950
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fun mk_random_typecopy tyco vs constr T' thy =
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haftmann@31254
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let
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haftmann@34956
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val mk_const = curry (Sign.mk_const thy);
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haftmann@31254
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val Ts = map TFree vs;
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haftmann@31254
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val T = Type (tyco, Ts);
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haftmann@31950
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val Tm = termifyT T;
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haftmann@31950
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val Tm' = termifyT T';
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haftmann@31254
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val v = "x";
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haftmann@31950
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val t_v = Free (v, Tm');
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haftmann@34956
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val t_constr = Const (constr, T' --> T);
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haftmann@31950
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val lhs = HOLogic.mk_random T size;
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haftmann@31950
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val rhs = HOLogic.mk_ST [((HOLogic.mk_random T' size, @{typ Random.seed}), SOME (v, Tm'))]
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haftmann@31950
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(HOLogic.mk_return Tm @{typ Random.seed}
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haftmann@32657
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(mk_const "Code_Evaluation.valapp" [T', T]
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haftmann@31254
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$ HOLogic.mk_prod (t_constr, Abs ("u", @{typ unit}, HOLogic.reflect_term t_constr)) $ t_v))
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haftmann@31950
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@{typ Random.seed} (SOME Tm, @{typ Random.seed});
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haftmann@31254
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val eq = HOLogic.mk_Trueprop (HOLogic.mk_eq (lhs, rhs));
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haftmann@31254
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in
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haftmann@31254
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thy
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wenzelm@33595
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|> Theory_Target.instantiation ([tyco], vs, @{sort random})
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haftmann@31254
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|> `(fn lthy => Syntax.check_term lthy eq)
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wenzelm@33280
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|-> (fn eq => Specification.definition (NONE, (apfst Binding.conceal Attrib.empty_binding, eq)))
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haftmann@31254
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|> snd
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haftmann@31254
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|> Class.prove_instantiation_exit (K (Class.intro_classes_tac []))
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haftmann@31254
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end;
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haftmann@31254
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haftmann@31254
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fun ensure_random_typecopy tyco thy =
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haftmann@31254
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let
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haftmann@31950
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val SOME { vs = raw_vs, constr, typ = raw_T, ... } =
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haftmann@31723
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Typecopy.get_info thy tyco;
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haftmann@31254
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val constrain = curry (Sorts.inter_sort (Sign.classes_of thy));
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haftmann@31950
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val T = map_atyps (fn TFree (v, sort) =>
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haftmann@31950
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TFree (v, constrain sort @{sort random})) raw_T;
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haftmann@31950
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val vs' = Term.add_tfreesT T [];
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haftmann@31254
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val vs = map (fn (v, sort) =>
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haftmann@31254
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(v, the_default (constrain sort @{sort typerep}) (AList.lookup (op =) vs' v))) raw_vs;
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haftmann@31950
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val can_inst = Sign.of_sort thy (T, @{sort random});
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haftmann@31950
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in if can_inst then mk_random_typecopy tyco vs constr T thy else thy end;
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haftmann@31254
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haftmann@31254
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haftmann@31254
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(** datatypes **)
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haftmann@31254
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haftmann@31494
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(* definitional scheme for random instances on datatypes *)
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haftmann@31494
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haftmann@31494
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(*FIXME avoid this low-level proving*)
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haftmann@31611
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local
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haftmann@31611
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haftmann@31494
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fun dest_ctyp_nth k cT = nth (Thm.dest_ctyp cT) k;
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haftmann@31611
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val eq = Thm.cprop_of @{thm random_aux_rec} |> Thm.dest_arg |> Thm.dest_arg |> Thm.dest_arg;
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haftmann@31611
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val lhs = eq |> Thm.dest_arg1;
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haftmann@31611
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val pt_random_aux = lhs |> Thm.dest_fun;
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haftmann@31611
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val ct_k = lhs |> Thm.dest_arg;
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haftmann@31611
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val pt_rhs = eq |> Thm.dest_arg |> Thm.dest_fun;
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haftmann@31611
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val aT = pt_random_aux |> Thm.ctyp_of_term |> dest_ctyp_nth 1;
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haftmann@31611
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haftmann@31611
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val rew_thms = map mk_meta_eq [@{thm code_numeral_zero_minus_one},
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haftmann@31611
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@{thm Suc_code_numeral_minus_one}, @{thm select_weight_cons_zero}, @{thm beyond_zero}];
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haftmann@31611
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val rew_ts = map (Logic.dest_equals o Thm.prop_of) rew_thms;
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haftmann@31611
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val rew_ss = HOL_ss addsimps rew_thms;
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haftmann@31611
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haftmann@31611
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in
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haftmann@31494
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haftmann@31494
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fun random_aux_primrec eq lthy =
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haftmann@31494
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let
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haftmann@31494
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val thy = ProofContext.theory_of lthy;
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haftmann@31611
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val ((t_random_aux as Free (random_aux, T)) $ (t_k as Free (v, _)), proto_t_rhs) =
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haftmann@31611
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(HOLogic.dest_eq o HOLogic.dest_Trueprop) eq;
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haftmann@31494
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val Type (_, [_, iT]) = T;
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haftmann@31494
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val icT = Thm.ctyp_of thy iT;
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haftmann@31611
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val cert = Thm.cterm_of thy;
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haftmann@31611
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val inst = Thm.instantiate_cterm ([(aT, icT)], []);
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haftmann@31494
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fun subst_v t' = map_aterms (fn t as Free (w, _) => if v = w then t' else t | t => t);
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haftmann@31611
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val t_rhs = lambda t_k proto_t_rhs;
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haftmann@31785
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val eqs0 = [subst_v @{term "0::code_numeral"} eq,
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haftmann@31785
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subst_v (@{term "Suc_code_numeral"} $ t_k) eq];
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haftmann@31611
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val eqs1 = map (Pattern.rewrite_term thy rew_ts []) eqs0;
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haftmann@35166
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val ((_, (_, eqs2)), lthy') = Primrec.add_primrec_simple
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haftmann@33205
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[((Binding.conceal (Binding.name random_aux), T), NoSyn)] eqs1 lthy;
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haftmann@31611
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val cT_random_aux = inst pt_random_aux;
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haftmann@31611
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val cT_rhs = inst pt_rhs;
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haftmann@31494
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val rule = @{thm random_aux_rec}
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haftmann@31611
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|> Drule.instantiate ([(aT, icT)],
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haftmann@31785
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[(cT_random_aux, cert t_random_aux), (cT_rhs, cert t_rhs)]);
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haftmann@31785
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val tac = ALLGOALS (rtac rule)
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haftmann@31785
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THEN ALLGOALS (simp_tac rew_ss)
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haftmann@35166
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THEN (ALLGOALS (ProofContext.fact_tac eqs2))
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wenzelm@32970
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val simp = Skip_Proof.prove lthy' [v] [] eq (K tac);
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haftmann@31494
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in (simp, lthy') end;
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haftmann@31494
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haftmann@31611
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end;
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haftmann@31611
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haftmann@31867
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fun random_aux_primrec_multi auxname [eq] lthy =
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haftmann@31494
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lthy
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haftmann@31494
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|> random_aux_primrec eq
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haftmann@31494
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|>> (fn simp => [simp])
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haftmann@31867
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| random_aux_primrec_multi auxname (eqs as _ :: _ :: _) lthy =
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haftmann@31494
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let
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haftmann@31494
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val thy = ProofContext.theory_of lthy;
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haftmann@31494
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val (lhss, rhss) = map_split (HOLogic.dest_eq o HOLogic.dest_Trueprop) eqs;
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haftmann@31494
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val (vs, (arg as Free (v, _)) :: _) = map_split (fn (t1 $ t2) => (t1, t2)) lhss;
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haftmann@31494
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val Ts = map fastype_of lhss;
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haftmann@31494
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val tupleT = foldr1 HOLogic.mk_prodT Ts;
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haftmann@31867
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val aux_lhs = Free ("mutual_" ^ auxname, fastype_of arg --> tupleT) $ arg;
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haftmann@31494
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val aux_eq = (HOLogic.mk_Trueprop o HOLogic.mk_eq)
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haftmann@31494
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(aux_lhs, foldr1 HOLogic.mk_prod rhss);
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haftmann@31494
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fun mk_proj t [T] = [t]
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haftmann@31494
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| mk_proj t (Ts as T :: (Ts' as _ :: _)) =
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haftmann@31494
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Const (@{const_name fst}, foldr1 HOLogic.mk_prodT Ts --> T) $ t
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haftmann@31494
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:: mk_proj (Const (@{const_name snd},
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haftmann@31494
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foldr1 HOLogic.mk_prodT Ts --> foldr1 HOLogic.mk_prodT Ts') $ t) Ts';
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haftmann@31494
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val projs = mk_proj (aux_lhs) Ts;
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haftmann@31494
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val proj_eqs = map2 (fn v => fn proj => (v, lambda arg proj)) vs projs;
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haftmann@31494
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val proj_defs = map2 (fn Free (name, _) => fn (_, rhs) =>
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haftmann@33205
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((Binding.conceal (Binding.name name), NoSyn),
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wenzelm@33280
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(apfst Binding.conceal Attrib.empty_binding, rhs))) vs proj_eqs;
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haftmann@31494
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val aux_eq' = Pattern.rewrite_term thy proj_eqs [] aux_eq;
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haftmann@31494
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fun prove_eqs aux_simp proj_defs lthy =
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haftmann@31494
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let
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haftmann@31494
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val proj_simps = map (snd o snd) proj_defs;
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wenzelm@31645
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fun tac { context = ctxt, prems = _ } =
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haftmann@31625
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ALLGOALS (simp_tac (HOL_ss addsimps proj_simps))
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haftmann@31494
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THEN ALLGOALS (EqSubst.eqsubst_tac ctxt [0] [aux_simp])
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haftmann@31494
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THEN ALLGOALS (simp_tac (HOL_ss addsimps [fst_conv, snd_conv]));
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wenzelm@32970
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in (map (fn prop => Skip_Proof.prove lthy [v] [] prop tac) eqs, lthy) end;
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haftmann@31494
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in
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haftmann@31494
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lthy
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haftmann@31494
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|> random_aux_primrec aux_eq'
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wenzelm@33812
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||>> fold_map Local_Theory.define proj_defs
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haftmann@31494
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|-> (fn (aux_simp, proj_defs) => prove_eqs aux_simp proj_defs)
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haftmann@31494
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end;
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haftmann@31494
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haftmann@31867
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fun random_aux_specification prfx name eqs lthy =
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haftmann@31494
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let
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haftmann@31595
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val vs = fold Term.add_free_names ((snd o strip_comb o fst o HOLogic.dest_eq
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haftmann@31595
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o HOLogic.dest_Trueprop o hd) eqs) [];
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haftmann@31494
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fun mk_proto_eq eq =
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haftmann@31494
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let
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haftmann@31595
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val (head $ t $ u, rhs) = (HOLogic.dest_eq o HOLogic.dest_Trueprop) eq;
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haftmann@31595
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in ((HOLogic.mk_Trueprop o HOLogic.mk_eq) (head, lambda t (lambda u rhs))) end;
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haftmann@31494
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val proto_eqs = map mk_proto_eq eqs;
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haftmann@31494
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fun prove_simps proto_simps lthy =
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haftmann@31494
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let
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haftmann@31625
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val ext_simps = map (fn thm => fun_cong OF [fun_cong OF [thm]]) proto_simps;
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haftmann@31625
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val tac = ALLGOALS (ProofContext.fact_tac ext_simps);
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wenzelm@32970
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in (map (fn prop => Skip_Proof.prove lthy vs [] prop (K tac)) eqs, lthy) end;
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haftmann@33205
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val b = Binding.conceal (Binding.qualify true prfx
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haftmann@33205
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(Binding.qualify true name (Binding.name "simps")));
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haftmann@31494
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in
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haftmann@31494
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lthy
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haftmann@31867
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|> random_aux_primrec_multi (name ^ prfx) proto_eqs
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haftmann@31494
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|-> (fn proto_simps => prove_simps proto_simps)
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wenzelm@33673
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|-> (fn simps => Local_Theory.note
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wenzelm@33666
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218 |
((b, Code.add_default_eqn_attrib :: map (Attrib.internal o K)
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wenzelm@33594
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219 |
[Simplifier.simp_add, Nitpick_Simps.add]), simps))
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haftmann@31494
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220 |
|> snd
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haftmann@31494
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end
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haftmann@31494
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222 |
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haftmann@31494
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223 |
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haftmann@31494
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224 |
(* constructing random instances on datatypes *)
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haftmann@31494
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225 |
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haftmann@31867
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val random_auxN = "random_aux";
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haftmann@31867
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227 |
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haftmann@31603
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228 |
fun mk_random_aux_eqs thy descr vs tycos (names, auxnames) (Ts, Us) =
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haftmann@31595
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229 |
let
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haftmann@31595
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230 |
val mk_const = curry (Sign.mk_const thy);
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haftmann@31603
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231 |
val random_auxsN = map (prefix (random_auxN ^ "_")) (names @ auxnames);
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haftmann@31603
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232 |
val rTs = Ts @ Us;
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haftmann@31595
|
233 |
fun random_resultT T = @{typ Random.seed}
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haftmann@31595
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234 |
--> HOLogic.mk_prodT (termifyT T,@{typ Random.seed});
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haftmann@31595
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235 |
val pTs = map random_resultT rTs;
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haftmann@31595
|
236 |
fun sizeT T = @{typ code_numeral} --> @{typ code_numeral} --> T;
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haftmann@31595
|
237 |
val random_auxT = sizeT o random_resultT;
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haftmann@31595
|
238 |
val random_auxs = map2 (fn s => fn rT => Free (s, random_auxT rT))
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haftmann@31595
|
239 |
random_auxsN rTs;
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haftmann@31950
|
240 |
fun mk_random_call T = (NONE, (HOLogic.mk_random T size', T));
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haftmann@31603
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241 |
fun mk_random_aux_call fTs (k, _) (tyco, Ts) =
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haftmann@31595
|
242 |
let
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haftmann@31623
|
243 |
val T = Type (tyco, Ts);
|
haftmann@31623
|
244 |
fun mk_random_fun_lift [] t = t
|
haftmann@31623
|
245 |
| mk_random_fun_lift (fT :: fTs) t =
|
haftmann@31623
|
246 |
mk_const @{const_name random_fun_lift} [fTs ---> T, fT] $
|
haftmann@31623
|
247 |
mk_random_fun_lift fTs t;
|
haftmann@31984
|
248 |
val t = mk_random_fun_lift fTs (nth random_auxs k $ size_pred $ size');
|
haftmann@33967
|
249 |
val size = Option.map snd (Datatype_Aux.find_shortest_path descr k)
|
haftmann@31595
|
250 |
|> the_default 0;
|
haftmann@31623
|
251 |
in (SOME size, (t, fTs ---> T)) end;
|
haftmann@33967
|
252 |
val tss = Datatype_Aux.interpret_construction descr vs
|
haftmann@31603
|
253 |
{ atyp = mk_random_call, dtyp = mk_random_aux_call };
|
haftmann@31595
|
254 |
fun mk_consexpr simpleT (c, xs) =
|
haftmann@31595
|
255 |
let
|
haftmann@31595
|
256 |
val (ks, simple_tTs) = split_list xs;
|
haftmann@31595
|
257 |
val T = termifyT simpleT;
|
haftmann@31595
|
258 |
val tTs = (map o apsnd) termifyT simple_tTs;
|
haftmann@31595
|
259 |
val is_rec = exists is_some ks;
|
wenzelm@33029
|
260 |
val k = fold (fn NONE => I | SOME k => Integer.max k) ks 0;
|
haftmann@31595
|
261 |
val vs = Name.names Name.context "x" (map snd simple_tTs);
|
haftmann@31595
|
262 |
val vs' = (map o apsnd) termifyT vs;
|
haftmann@31595
|
263 |
val tc = HOLogic.mk_return T @{typ Random.seed}
|
haftmann@31595
|
264 |
(HOLogic.mk_valtermify_app c vs simpleT);
|
haftmann@31595
|
265 |
val t = HOLogic.mk_ST (map (fn (t, _) => (t, @{typ Random.seed})) tTs ~~ map SOME vs')
|
haftmann@31595
|
266 |
tc @{typ Random.seed} (SOME T, @{typ Random.seed});
|
haftmann@31595
|
267 |
val tk = if is_rec
|
haftmann@31950
|
268 |
then if k = 0 then size
|
haftmann@31595
|
269 |
else @{term "Quickcheck.beyond :: code_numeral \<Rightarrow> code_numeral \<Rightarrow> code_numeral"}
|
haftmann@31950
|
270 |
$ HOLogic.mk_number @{typ code_numeral} k $ size
|
haftmann@31595
|
271 |
else @{term "1::code_numeral"}
|
haftmann@31595
|
272 |
in (is_rec, HOLogic.mk_prod (tk, t)) end;
|
haftmann@31595
|
273 |
fun sort_rec xs =
|
haftmann@31595
|
274 |
map_filter (fn (true, t) => SOME t | _ => NONE) xs
|
haftmann@31595
|
275 |
@ map_filter (fn (false, t) => SOME t | _ => NONE) xs;
|
haftmann@31603
|
276 |
val gen_exprss = tss
|
haftmann@31603
|
277 |
|> (map o apfst) Type
|
haftmann@31595
|
278 |
|> map (fn (T, cs) => (T, (sort_rec o map (mk_consexpr T)) cs));
|
haftmann@31595
|
279 |
fun mk_select (rT, xs) =
|
haftmann@31595
|
280 |
mk_const @{const_name Quickcheck.collapse} [@{typ "Random.seed"}, termifyT rT]
|
haftmann@31595
|
281 |
$ (mk_const @{const_name Random.select_weight} [random_resultT rT]
|
haftmann@31595
|
282 |
$ HOLogic.mk_list (HOLogic.mk_prodT (@{typ code_numeral}, random_resultT rT)) xs)
|
haftmann@31595
|
283 |
$ seed;
|
haftmann@31950
|
284 |
val auxs_lhss = map (fn t => t $ size $ size' $ seed) random_auxs;
|
haftmann@31595
|
285 |
val auxs_rhss = map mk_select gen_exprss;
|
haftmann@31867
|
286 |
in (random_auxs, auxs_lhss ~~ auxs_rhss) end;
|
haftmann@31595
|
287 |
|
haftmann@31867
|
288 |
fun mk_random_datatype config descr vs tycos prfx (names, auxnames) (Ts, Us) thy =
|
haftmann@31595
|
289 |
let
|
haftmann@33967
|
290 |
val _ = Datatype_Aux.message config "Creating quickcheck generators ...";
|
haftmann@31595
|
291 |
val mk_prop_eq = HOLogic.mk_Trueprop o HOLogic.mk_eq;
|
haftmann@33967
|
292 |
fun mk_size_arg k = case Datatype_Aux.find_shortest_path descr k
|
haftmann@31950
|
293 |
of SOME (_, l) => if l = 0 then size
|
haftmann@31595
|
294 |
else @{term "max :: code_numeral \<Rightarrow> code_numeral \<Rightarrow> code_numeral"}
|
haftmann@31950
|
295 |
$ HOLogic.mk_number @{typ code_numeral} l $ size
|
haftmann@31950
|
296 |
| NONE => size;
|
haftmann@31867
|
297 |
val (random_auxs, auxs_eqs) = (apsnd o map) mk_prop_eq
|
haftmann@31603
|
298 |
(mk_random_aux_eqs thy descr vs tycos (names, auxnames) (Ts, Us));
|
haftmann@31595
|
299 |
val random_defs = map_index (fn (k, T) => mk_prop_eq
|
haftmann@31950
|
300 |
(HOLogic.mk_random T size, nth random_auxs k $ mk_size_arg k $ size)) Ts;
|
haftmann@31595
|
301 |
in
|
haftmann@31595
|
302 |
thy
|
wenzelm@33595
|
303 |
|> Theory_Target.instantiation (tycos, vs, @{sort random})
|
haftmann@31867
|
304 |
|> random_aux_specification prfx random_auxN auxs_eqs
|
haftmann@31595
|
305 |
|> `(fn lthy => map (Syntax.check_term lthy) random_defs)
|
haftmann@31595
|
306 |
|-> (fn random_defs' => fold_map (fn random_def =>
|
wenzelm@33280
|
307 |
Specification.definition (NONE, (apfst Binding.conceal
|
haftmann@33205
|
308 |
Attrib.empty_binding, random_def))) random_defs')
|
haftmann@31595
|
309 |
|> snd
|
haftmann@31595
|
310 |
|> Class.prove_instantiation_exit (K (Class.intro_classes_tac []))
|
haftmann@31595
|
311 |
end;
|
haftmann@31595
|
312 |
|
haftmann@31623
|
313 |
fun perhaps_constrain thy insts raw_vs =
|
haftmann@31623
|
314 |
let
|
haftmann@31623
|
315 |
fun meet_random (T, sort) = Sorts.meet_sort (Sign.classes_of thy)
|
haftmann@31623
|
316 |
(Logic.varifyT T, sort);
|
haftmann@31623
|
317 |
val vtab = Vartab.empty
|
haftmann@31623
|
318 |
|> fold (fn (v, sort) => Vartab.update ((v, 0), sort)) raw_vs
|
haftmann@31623
|
319 |
|> fold meet_random insts;
|
haftmann@31623
|
320 |
in SOME (fn (v, _) => (v, (the o Vartab.lookup vtab) (v, 0)))
|
wenzelm@33092
|
321 |
end handle Sorts.CLASS_ERROR _ => NONE;
|
haftmann@31623
|
322 |
|
haftmann@31668
|
323 |
fun ensure_random_datatype config raw_tycos thy =
|
haftmann@31595
|
324 |
let
|
haftmann@31595
|
325 |
val algebra = Sign.classes_of thy;
|
haftmann@31867
|
326 |
val (descr, raw_vs, tycos, prfx, (names, auxnames), raw_TUs) =
|
haftmann@31784
|
327 |
Datatype.the_descr thy raw_tycos;
|
haftmann@32378
|
328 |
val typerep_vs = (map o apsnd)
|
haftmann@31744
|
329 |
(curry (Sorts.inter_sort algebra) @{sort typerep}) raw_vs;
|
haftmann@31623
|
330 |
val random_insts = (map (rpair @{sort random}) o flat o maps snd o maps snd)
|
haftmann@33967
|
331 |
(Datatype_Aux.interpret_construction descr typerep_vs
|
haftmann@31744
|
332 |
{ atyp = single, dtyp = (K o K o K) [] });
|
haftmann@31623
|
333 |
val term_of_insts = (map (rpair @{sort term_of}) o flat o maps snd o maps snd)
|
haftmann@33967
|
334 |
(Datatype_Aux.interpret_construction descr typerep_vs
|
haftmann@31744
|
335 |
{ atyp = K [], dtyp = K o K });
|
haftmann@31608
|
336 |
val has_inst = exists (fn tyco =>
|
haftmann@31595
|
337 |
can (Sorts.mg_domain algebra tyco) @{sort random}) tycos;
|
haftmann@31623
|
338 |
in if has_inst then thy
|
haftmann@32378
|
339 |
else case perhaps_constrain thy (random_insts @ term_of_insts) typerep_vs
|
haftmann@31668
|
340 |
of SOME constrain => mk_random_datatype config descr
|
haftmann@32378
|
341 |
(map constrain typerep_vs) tycos prfx (names, auxnames)
|
haftmann@31623
|
342 |
((pairself o map o map_atyps) (fn TFree v => TFree (constrain v)) raw_TUs) thy
|
haftmann@31623
|
343 |
| NONE => thy
|
haftmann@31623
|
344 |
end;
|
haftmann@31254
|
345 |
|
haftmann@31254
|
346 |
|
haftmann@31950
|
347 |
(** building and compiling generator expressions **)
|
haftmann@31950
|
348 |
|
wenzelm@32740
|
349 |
val eval_ref :
|
wenzelm@32740
|
350 |
(unit -> int -> int * int -> term list option * (int * int)) option Unsynchronized.ref =
|
wenzelm@32740
|
351 |
Unsynchronized.ref NONE;
|
haftmann@31950
|
352 |
|
haftmann@31950
|
353 |
val target = "Quickcheck";
|
haftmann@31950
|
354 |
|
haftmann@31950
|
355 |
fun mk_generator_expr thy prop Ts =
|
haftmann@31950
|
356 |
let
|
haftmann@31950
|
357 |
val bound_max = length Ts - 1;
|
haftmann@31950
|
358 |
val bounds = map_index (fn (i, ty) =>
|
haftmann@31950
|
359 |
(2 * (bound_max - i) + 1, 2 * (bound_max - i), 2 * i, ty)) Ts;
|
haftmann@31950
|
360 |
val result = list_comb (prop, map (fn (i, _, _, _) => Bound i) bounds);
|
haftmann@31950
|
361 |
val terms = HOLogic.mk_list @{typ term} (map (fn (_, i, _, _) => Bound i $ @{term "()"}) bounds);
|
haftmann@31950
|
362 |
val check = @{term "If :: bool => term list option => term list option => term list option"}
|
haftmann@31950
|
363 |
$ result $ @{term "None :: term list option"} $ (@{term "Some :: term list => term list option "} $ terms);
|
haftmann@31950
|
364 |
val return = @{term "Pair :: term list option => Random.seed => term list option * Random.seed"};
|
haftmann@31950
|
365 |
fun liftT T sT = sT --> HOLogic.mk_prodT (T, sT);
|
haftmann@31950
|
366 |
fun mk_termtyp T = HOLogic.mk_prodT (T, @{typ "unit => term"});
|
haftmann@31950
|
367 |
fun mk_scomp T1 T2 sT f g = Const (@{const_name scomp},
|
haftmann@31950
|
368 |
liftT T1 sT --> (T1 --> liftT T2 sT) --> liftT T2 sT) $ f $ g;
|
haftmann@31950
|
369 |
fun mk_split T = Sign.mk_const thy
|
haftmann@31950
|
370 |
(@{const_name split}, [T, @{typ "unit => term"}, liftT @{typ "term list option"} @{typ Random.seed}]);
|
haftmann@31950
|
371 |
fun mk_scomp_split T t t' =
|
haftmann@31950
|
372 |
mk_scomp (mk_termtyp T) @{typ "term list option"} @{typ Random.seed} t
|
haftmann@31950
|
373 |
(mk_split T $ Abs ("", T, Abs ("", @{typ "unit => term"}, t')));
|
haftmann@31950
|
374 |
fun mk_bindclause (_, _, i, T) = mk_scomp_split T
|
haftmann@31950
|
375 |
(Sign.mk_const thy (@{const_name Quickcheck.random}, [T]) $ Bound i);
|
haftmann@31950
|
376 |
in Abs ("n", @{typ code_numeral}, fold_rev mk_bindclause bounds (return $ check)) end;
|
haftmann@31950
|
377 |
|
haftmann@31950
|
378 |
fun compile_generator_expr thy t =
|
haftmann@31950
|
379 |
let
|
haftmann@31950
|
380 |
val Ts = (map snd o fst o strip_abs) t;
|
haftmann@31950
|
381 |
val t' = mk_generator_expr thy t Ts;
|
haftmann@34026
|
382 |
val compile = Code_Eval.eval (SOME target) ("Quickcheck_Generators.eval_ref", eval_ref)
|
haftmann@31950
|
383 |
(fn proc => fn g => fn s => g s #>> (Option.map o map) proc) thy t' [];
|
haftmann@31950
|
384 |
in compile #> Random_Engine.run end;
|
haftmann@31950
|
385 |
|
haftmann@31950
|
386 |
|
haftmann@31254
|
387 |
(** setup **)
|
haftmann@31254
|
388 |
|
haftmann@31950
|
389 |
val setup = Typecopy.interpretation ensure_random_typecopy
|
haftmann@31950
|
390 |
#> Datatype.interpretation ensure_random_datatype
|
haftmann@34026
|
391 |
#> Code_Target.extend_target (target, (Code_Eval.target, K I))
|
haftmann@31950
|
392 |
#> Quickcheck.add_generator ("code", compile_generator_expr o ProofContext.theory_of);
|
haftmann@31254
|
393 |
|
haftmann@31254
|
394 |
end;
|