src/Pure/Isar/code.ML
author haftmann
Tue Jul 14 16:27:33 2009 +0200 (2009-07-14 ago)
changeset 32070 c670a31c964c
parent 31998 2c7a24f74db9
child 32091 30e2ffbba718
child 32122 4ee1c1aebbcc
permissions -rw-r--r--
clarified code
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(*  Title:      Pure/Isar/code.ML
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    Author:     Florian Haftmann, TU Muenchen
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Abstract executable code of theory.  Management of data dependent on
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executable code.  Cache assumes non-concurrent processing of a single theory.
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*)
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signature CODE =
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sig
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  (*constants*)
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  val check_const: theory -> term -> string
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  val read_bare_const: theory -> string -> string * typ
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  val read_const: theory -> string -> string
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  val string_of_const: theory -> string -> string
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  val args_number: theory -> string -> int
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  val typscheme: theory -> string * typ -> (string * sort) list * typ
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  (*constructor sets*)
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  val constrset_of_consts: theory -> (string * typ) list
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    -> string * ((string * sort) list * (string * typ list) list)
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  (*constant aliasses*)
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  val add_const_alias: thm -> theory -> theory
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  val triv_classes: theory -> class list
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  val resubst_alias: theory -> string -> string
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  (*code equations*)
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  val mk_eqn: theory -> thm * bool -> thm * bool
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  val mk_eqn_warning: theory -> thm -> (thm * bool) option
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  val mk_eqn_liberal: theory -> thm -> (thm * bool) option
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  val assert_eqn: theory -> thm * bool -> thm * bool
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  val assert_eqns_const: theory -> string
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    -> (thm * bool) list -> (thm * bool) list
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  val const_typ_eqn: theory -> thm -> string * typ
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  val typscheme_eqn: theory -> thm -> (string * sort) list * typ
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  val expand_eta: theory -> int -> thm -> thm
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  val norm_args: theory -> thm list -> thm list 
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  val norm_varnames: theory -> thm list -> thm list
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  (*executable code*)
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  val add_datatype: (string * typ) list -> theory -> theory
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  val add_datatype_cmd: string list -> theory -> theory
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  val type_interpretation:
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    (string * ((string * sort) list * (string * typ list) list)
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      -> theory -> theory) -> theory -> theory
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  val add_eqn: thm -> theory -> theory
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  val add_eqnl: string * (thm * bool) list lazy -> theory -> theory
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  val add_nbe_eqn: thm -> theory -> theory
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  val add_default_eqn: thm -> theory -> theory
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  val add_default_eqn_attribute: attribute
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  val add_default_eqn_attrib: Attrib.src
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  val del_eqn: thm -> theory -> theory
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  val del_eqns: string -> theory -> theory
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  val add_case: thm -> theory -> theory
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  val add_undefined: string -> theory -> theory
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  val get_datatype: theory -> string -> ((string * sort) list * (string * typ list) list)
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  val get_datatype_of_constr: theory -> string -> string option
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  val these_eqns: theory -> string -> (thm * bool) list
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  val all_eqns: theory -> (thm * bool) list
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  val get_case_scheme: theory -> string -> (int * (int * string list)) option
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  val undefineds: theory -> string list
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  val print_codesetup: theory -> unit
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  (*infrastructure*)
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  val set_code_target_attr: (string -> thm -> theory -> theory) -> theory -> theory
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  val purge_data: theory -> theory
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end;
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signature CODE_DATA_ARGS =
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sig
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  type T
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  val empty: T
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  val purge: theory -> string list -> T -> T
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end;
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signature CODE_DATA =
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sig
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  type T
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  val get: theory -> T
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  val change: theory -> (T -> T) -> T
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  val change_yield: theory -> (T -> 'a * T) -> 'a * T
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end;
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signature PRIVATE_CODE =
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sig
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  include CODE
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  val declare_data: Object.T -> (theory -> string list -> Object.T -> Object.T)
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    -> serial
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  val get_data: serial * ('a -> Object.T) * (Object.T -> 'a)
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    -> theory -> 'a
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  val change_data: serial * ('a -> Object.T) * (Object.T -> 'a)
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    -> theory -> ('a -> 'a) -> 'a
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  val change_yield_data: serial * ('a -> Object.T) * (Object.T -> 'a)
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    -> theory -> ('a -> 'b * 'a) -> 'b * 'a
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end;
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structure Code : PRIVATE_CODE =
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struct
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(** auxiliary **)
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(* printing *)
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fun string_of_typ thy = setmp show_sorts true (Syntax.string_of_typ_global thy);
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fun string_of_const thy c = case AxClass.inst_of_param thy c
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 of SOME (c, tyco) => Sign.extern_const thy c ^ " " ^ enclose "[" "]" (Sign.extern_type thy tyco)
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  | NONE => Sign.extern_const thy c;
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(* constants *)
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fun check_bare_const thy t = case try dest_Const t
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 of SOME c_ty => c_ty
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  | NONE => error ("Not a constant: " ^ Syntax.string_of_term_global thy t);
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fun check_const thy = AxClass.unoverload_const thy o check_bare_const thy;
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fun read_bare_const thy = check_bare_const thy o Syntax.read_term_global thy;
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fun read_const thy = AxClass.unoverload_const thy o read_bare_const thy;
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fun typscheme thy (c, ty) =
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  let
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    val ty' = Logic.unvarifyT ty;
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  in (map dest_TFree (Sign.const_typargs thy (c, ty')), Type.strip_sorts ty') end;
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(* code equation transformations *)
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fun expand_eta thy k thm =
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  let
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    val (lhs, rhs) = (Logic.dest_equals o Thm.plain_prop_of) thm;
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    val (head, args) = strip_comb lhs;
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    val l = if k = ~1
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      then (length o fst o strip_abs) rhs
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      else Int.max (0, k - length args);
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    val used = Name.make_context (map (fst o fst) (Term.add_vars lhs []));
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    fun get_name _ 0 = pair []
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      | get_name (Abs (v, ty, t)) k =
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          Name.variants [v]
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          ##>> get_name t (k - 1)
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          #>> (fn ([v'], vs') => (v', ty) :: vs')
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      | get_name t k = 
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          let
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            val (tys, _) = (strip_type o fastype_of) t
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          in case tys
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           of [] => raise TERM ("expand_eta", [t])
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            | ty :: _ =>
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                Name.variants [""]
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                #-> (fn [v] => get_name (t $ Var ((v, 0), ty)) (k - 1)
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                #>> (fn vs' => (v, ty) :: vs'))
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          end;
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    val (vs, _) = get_name rhs l used;
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    fun expand (v, ty) thm = Drule.fun_cong_rule thm
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      (Thm.cterm_of thy (Var ((v, 0), ty)));
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  in
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    thm
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    |> fold expand vs
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    |> Conv.fconv_rule Drule.beta_eta_conversion
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  end;
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fun norm_args thy thms =
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  let
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    val num_args_of = length o snd o strip_comb o fst o Logic.dest_equals;
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    val k = fold (curry Int.max o num_args_of o Thm.prop_of) thms 0;
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  in
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    thms
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    |> map (expand_eta thy k)
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    |> map (Conv.fconv_rule Drule.beta_eta_conversion)
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  end;
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fun canonical_tvars thy thm =
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  let
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    val ctyp = Thm.ctyp_of thy;
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    val purify_tvar = unprefix "'" #> Name.desymbolize false #> prefix "'";
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    fun tvars_subst_for thm = (fold_types o fold_atyps)
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      (fn TVar (v_i as (v, _), sort) => let
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            val v' = purify_tvar v
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          in if v = v' then I
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          else insert (op =) (v_i, (v', sort)) end
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        | _ => I) (prop_of thm) [];
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    fun mk_inst (v_i, (v', sort)) (maxidx, acc) =
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      let
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        val ty = TVar (v_i, sort)
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      in
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        (maxidx + 1, (ctyp ty, ctyp (TVar ((v', maxidx), sort))) :: acc)
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      end;
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    val maxidx = Thm.maxidx_of thm + 1;
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    val (_, inst) = fold mk_inst (tvars_subst_for thm) (maxidx + 1, []);
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  in Thm.instantiate (inst, []) thm end;
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fun canonical_vars thy thm =
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  let
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    val cterm = Thm.cterm_of thy;
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    val purify_var = Name.desymbolize false;
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    fun vars_subst_for thm = fold_aterms
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      (fn Var (v_i as (v, _), ty) => let
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            val v' = purify_var v
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          in if v = v' then I
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          else insert (op =) (v_i, (v', ty)) end
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        | _ => I) (prop_of thm) [];
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    fun mk_inst (v_i as (v, i), (v', ty)) (maxidx, acc) =
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      let
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        val t = Var (v_i, ty)
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      in
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        (maxidx + 1, (cterm t, cterm (Var ((v', maxidx), ty))) :: acc)
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      end;
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    val maxidx = Thm.maxidx_of thm + 1;
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    val (_, inst) = fold mk_inst (vars_subst_for thm) (maxidx + 1, []);
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  in Thm.instantiate ([], inst) thm end;
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fun canonical_absvars thm =
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  let
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    val t = Thm.plain_prop_of thm;
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    val purify_var = Name.desymbolize false;
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    val t' = Term.map_abs_vars purify_var t;
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  in Thm.rename_boundvars t t' thm end;
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fun norm_varnames thy thms =
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  let
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    fun burrow_thms f [] = []
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      | burrow_thms f thms =
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          thms
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          |> Conjunction.intr_balanced
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          |> f
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          |> Conjunction.elim_balanced (length thms)
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  in
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    thms
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    |> map (canonical_vars thy)
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    |> map canonical_absvars
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    |> map Drule.zero_var_indexes
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    |> burrow_thms (canonical_tvars thy)
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    |> Drule.zero_var_indexes_list
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  end;
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(** data store **)
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(* code equations *)
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type eqns = bool * (thm * bool) list lazy;
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  (*default flag, theorems with proper flag (perhaps lazy)*)
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fun pretty_lthms ctxt r = case Lazy.peek r
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 of SOME thms => map (ProofContext.pretty_thm ctxt o fst) (Exn.release thms)
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  | NONE => [Pretty.str "[...]"];
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fun certificate thy f r =
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  case Lazy.peek r
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   of SOME thms => (Lazy.value o f thy) (Exn.release thms)
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    | NONE => let
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        val thy_ref = Theory.check_thy thy;
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      in Lazy.lazy (fn () => (f (Theory.deref thy_ref) o Lazy.force) r) end;
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fun add_drop_redundant thy (thm, proper) thms =
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  let
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    val args_of = snd o strip_comb o map_types Type.strip_sorts
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      o fst o Logic.dest_equals o Thm.plain_prop_of;
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    val args = args_of thm;
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    val incr_idx = Logic.incr_indexes ([], Thm.maxidx_of thm + 1);
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    fun matches_args args' = length args <= length args' andalso
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      Pattern.matchess thy (args, (map incr_idx o curry Library.take (length args)) args');
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    fun drop (thm', proper') = if (proper orelse not proper')
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      andalso matches_args (args_of thm') then 
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        (warning ("Code generator: dropping redundant code equation\n" ^ Display.string_of_thm thm'); true)
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      else false;
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  in (thm, proper) :: filter_out drop thms end;
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fun add_thm thy _ thm (false, thms) = (false, Lazy.map_force (add_drop_redundant thy thm) thms)
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  | add_thm thy true thm (true, thms) = (true, Lazy.map_force (fn thms => thms @ [thm]) thms)
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  | add_thm thy false thm (true, thms) = (false, Lazy.value [thm]);
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fun add_lthms lthms _ = (false, lthms);
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fun del_thm thm = (apsnd o Lazy.map_force) (remove (eq_fst Thm.eq_thm_prop) (thm, true));
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(* executable code data *)
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datatype spec = Spec of {
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  history_concluded: bool,
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  aliasses: ((string * string) * thm) list * class list,
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  eqns: ((bool * eqns) * (serial * eqns) list) Symtab.table
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    (*with explicit history*),
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  dtyps: ((serial * ((string * sort) list * (string * typ list) list)) list) Symtab.table
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    (*with explicit history*),
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  cases: (int * (int * string list)) Symtab.table * unit Symtab.table
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};
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fun make_spec ((history_concluded, aliasses), (eqns, (dtyps, cases))) =
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  Spec { history_concluded = history_concluded, aliasses = aliasses,
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    eqns = eqns, dtyps = dtyps, cases = cases };
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fun map_spec f (Spec { history_concluded = history_concluded, aliasses = aliasses, eqns = eqns,
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  dtyps = dtyps, cases = cases }) =
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  make_spec (f ((history_concluded, aliasses), (eqns, (dtyps, cases))));
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fun merge_spec (Spec { history_concluded = _, aliasses = aliasses1, eqns = eqns1,
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    dtyps = dtyps1, cases = (cases1, undefs1) },
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  Spec { history_concluded = _, aliasses = aliasses2, eqns = eqns2,
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    dtyps = dtyps2, cases = (cases2, undefs2) }) =
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  let
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    val aliasses = (Library.merge (eq_snd Thm.eq_thm_prop) (pairself fst (aliasses1, aliasses2)),
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      Library.merge (op =) (pairself snd (aliasses1, aliasses2)));
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    fun merge_eqns ((_, history1), (_, history2)) =
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      let
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        val raw_history = AList.merge (op = : serial * serial -> bool)
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          (K true) (history1, history2)
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        val filtered_history = filter_out (fst o snd) raw_history
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        val history = if null filtered_history
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          then raw_history else filtered_history;
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      in ((false, (snd o hd) history), history) end;
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    val eqns = Symtab.join (K merge_eqns) (eqns1, eqns2);
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    val dtyps = Symtab.join (K (AList.merge (op =) (K true))) (dtyps1, dtyps2);
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    val cases = (Symtab.merge (K true) (cases1, cases2),
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      Symtab.merge (K true) (undefs1, undefs2));
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  in make_spec ((false, aliasses), (eqns, (dtyps, cases))) end;
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   317
haftmann@31962
   318
fun history_concluded (Spec { history_concluded, ... }) = history_concluded;
haftmann@31962
   319
fun the_aliasses (Spec { aliasses, ... }) = aliasses;
haftmann@31962
   320
fun the_eqns (Spec { eqns, ... }) = eqns;
haftmann@31962
   321
fun the_dtyps (Spec { dtyps, ... }) = dtyps;
haftmann@31962
   322
fun the_cases (Spec { cases, ... }) = cases;
haftmann@31962
   323
val map_history_concluded = map_spec o apfst o apfst;
haftmann@31962
   324
val map_aliasses = map_spec o apfst o apsnd;
haftmann@31962
   325
val map_eqns = map_spec o apsnd o apfst;
haftmann@31962
   326
val map_dtyps = map_spec o apsnd o apsnd o apfst;
haftmann@31962
   327
val map_cases = map_spec o apsnd o apsnd o apsnd;
haftmann@31962
   328
haftmann@31962
   329
haftmann@31962
   330
(* data slots dependent on executable code *)
haftmann@31962
   331
haftmann@31962
   332
(*private copy avoids potential conflict of table exceptions*)
wenzelm@31971
   333
structure Datatab = Table(type key = int val ord = int_ord);
haftmann@31962
   334
haftmann@31962
   335
local
haftmann@31962
   336
haftmann@31962
   337
type kind = {
haftmann@31962
   338
  empty: Object.T,
haftmann@31962
   339
  purge: theory -> string list -> Object.T -> Object.T
haftmann@31962
   340
};
haftmann@31962
   341
haftmann@31962
   342
val kinds = ref (Datatab.empty: kind Datatab.table);
haftmann@31962
   343
val kind_keys = ref ([]: serial list);
haftmann@31962
   344
haftmann@31962
   345
fun invoke f k = case Datatab.lookup (! kinds) k
haftmann@31962
   346
 of SOME kind => f kind
haftmann@31962
   347
  | NONE => sys_error "Invalid code data identifier";
haftmann@31962
   348
haftmann@31962
   349
in
haftmann@31962
   350
haftmann@31962
   351
fun declare_data empty purge =
haftmann@31962
   352
  let
haftmann@31962
   353
    val k = serial ();
haftmann@31962
   354
    val kind = {empty = empty, purge = purge};
haftmann@31962
   355
    val _ = change kinds (Datatab.update (k, kind));
haftmann@31962
   356
    val _ = change kind_keys (cons k);
haftmann@31962
   357
  in k end;
haftmann@31962
   358
haftmann@31962
   359
fun invoke_init k = invoke (fn kind => #empty kind) k;
haftmann@31962
   360
haftmann@31962
   361
fun invoke_purge_all thy cs =
haftmann@31962
   362
  fold (fn k => Datatab.map_entry k
haftmann@31962
   363
    (invoke (fn kind => #purge kind thy cs) k)) (! kind_keys);
haftmann@31962
   364
haftmann@31962
   365
end; (*local*)
haftmann@31962
   366
haftmann@31962
   367
haftmann@31962
   368
(* theory store *)
haftmann@31962
   369
haftmann@31962
   370
local
haftmann@31962
   371
haftmann@31962
   372
type data = Object.T Datatab.table;
haftmann@31962
   373
val empty_data = Datatab.empty : data;
haftmann@31962
   374
haftmann@31962
   375
structure Code_Data = TheoryDataFun
haftmann@31962
   376
(
haftmann@31962
   377
  type T = spec * data ref;
haftmann@31962
   378
  val empty = (make_spec ((false, ([], [])),
haftmann@31962
   379
    (Symtab.empty, (Symtab.empty, (Symtab.empty, Symtab.empty)))), ref empty_data);
haftmann@31962
   380
  fun copy (spec, data) = (spec, ref (! data));
haftmann@31962
   381
  val extend = copy;
haftmann@31962
   382
  fun merge pp ((spec1, data1), (spec2, data2)) =
haftmann@31962
   383
    (merge_spec (spec1, spec2), ref empty_data);
haftmann@31962
   384
);
haftmann@31962
   385
haftmann@31962
   386
fun thy_data f thy = f ((snd o Code_Data.get) thy);
haftmann@31962
   387
haftmann@31962
   388
fun get_ensure_init kind data_ref =
haftmann@31962
   389
  case Datatab.lookup (! data_ref) kind
haftmann@31962
   390
   of SOME x => x
haftmann@31962
   391
    | NONE => let val y = invoke_init kind
haftmann@31962
   392
        in (change data_ref (Datatab.update (kind, y)); y) end;
haftmann@31962
   393
haftmann@31962
   394
in
haftmann@31962
   395
haftmann@31962
   396
(* access to executable code *)
haftmann@31962
   397
haftmann@31962
   398
val the_exec = fst o Code_Data.get;
haftmann@31962
   399
haftmann@31962
   400
fun complete_class_params thy cs =
haftmann@31962
   401
  fold (fn c => case AxClass.inst_of_param thy c
haftmann@31962
   402
   of NONE => insert (op =) c
haftmann@31962
   403
    | SOME (c', _) => insert (op =) c' #> insert (op =) c) cs [];
haftmann@31962
   404
haftmann@31962
   405
fun map_exec_purge touched f thy =
haftmann@31962
   406
  Code_Data.map (fn (exec, data) => (f exec, ref (case touched
haftmann@31962
   407
   of SOME cs => invoke_purge_all thy (complete_class_params thy cs) (! data)
haftmann@31962
   408
    | NONE => empty_data))) thy;
haftmann@31962
   409
haftmann@31962
   410
val purge_data = (Code_Data.map o apsnd) (K (ref empty_data));
haftmann@31962
   411
haftmann@31962
   412
fun change_eqns delete c f = (map_exec_purge (SOME [c]) o map_eqns
haftmann@31962
   413
  o (if delete then Symtab.map_entry c else Symtab.map_default (c, ((false, (true, Lazy.value [])), [])))
haftmann@31962
   414
    o apfst) (fn (_, eqns) => (true, f eqns));
haftmann@31962
   415
haftmann@31962
   416
fun del_eqns c = change_eqns true c (K (false, Lazy.value []));
haftmann@31962
   417
haftmann@31962
   418
haftmann@31962
   419
(* tackling equation history *)
haftmann@31962
   420
haftmann@31962
   421
fun get_eqns thy c =
haftmann@31962
   422
  Symtab.lookup ((the_eqns o the_exec) thy) c
haftmann@31962
   423
  |> Option.map (Lazy.force o snd o snd o fst)
haftmann@31962
   424
  |> these;
haftmann@31962
   425
haftmann@31962
   426
fun continue_history thy = if (history_concluded o the_exec) thy
haftmann@31962
   427
  then thy
haftmann@31962
   428
    |> (Code_Data.map o apfst o map_history_concluded) (K false)
haftmann@31962
   429
    |> SOME
haftmann@31962
   430
  else NONE;
haftmann@31962
   431
haftmann@31962
   432
fun conclude_history thy = if (history_concluded o the_exec) thy
haftmann@31962
   433
  then NONE
haftmann@31962
   434
  else thy
haftmann@31962
   435
    |> (Code_Data.map o apfst)
haftmann@31962
   436
        ((map_eqns o Symtab.map) (fn ((changed, current), history) =>
haftmann@31962
   437
          ((false, current),
haftmann@31962
   438
            if changed then (serial (), current) :: history else history))
haftmann@31962
   439
        #> map_history_concluded (K true))
haftmann@31962
   440
    |> SOME;
haftmann@31962
   441
haftmann@31962
   442
val _ = Context.>> (Context.map_theory (Code_Data.init
haftmann@31962
   443
  #> Theory.at_begin continue_history
haftmann@31962
   444
  #> Theory.at_end conclude_history));
haftmann@31962
   445
haftmann@31962
   446
haftmann@31962
   447
(* access to data dependent on abstract executable code *)
haftmann@31962
   448
haftmann@31962
   449
fun get_data (kind, _, dest) = thy_data (get_ensure_init kind #> dest);
haftmann@31962
   450
haftmann@31962
   451
fun change_data (kind, mk, dest) =
haftmann@31962
   452
  let
haftmann@31962
   453
    fun chnge data_ref f =
haftmann@31962
   454
      let
haftmann@31962
   455
        val data = get_ensure_init kind data_ref;
haftmann@31962
   456
        val data' = f (dest data);
haftmann@31962
   457
      in (change data_ref (Datatab.update (kind, mk data')); data') end;
haftmann@31962
   458
  in thy_data chnge end;
haftmann@31962
   459
haftmann@31962
   460
fun change_yield_data (kind, mk, dest) =
haftmann@31962
   461
  let
haftmann@31962
   462
    fun chnge data_ref f =
haftmann@31962
   463
      let
haftmann@31962
   464
        val data = get_ensure_init kind data_ref;
haftmann@31962
   465
        val (x, data') = f (dest data);
haftmann@31962
   466
      in (x, (change data_ref (Datatab.update (kind, mk data')); data')) end;
haftmann@31962
   467
  in thy_data chnge end;
haftmann@31962
   468
haftmann@31962
   469
end; (*local*)
haftmann@31962
   470
haftmann@31962
   471
haftmann@31962
   472
(** retrieval interfaces **)
haftmann@31962
   473
haftmann@31962
   474
(* constant aliasses *)
haftmann@31156
   475
haftmann@31156
   476
fun resubst_alias thy =
haftmann@31156
   477
  let
haftmann@31962
   478
    val alias = (fst o the_aliasses o the_exec) thy;
haftmann@31156
   479
    val subst_inst_param = Option.map fst o AxClass.inst_of_param thy;
haftmann@31156
   480
    fun subst_alias c =
haftmann@31156
   481
      get_first (fn ((c', c''), _) => if c = c'' then SOME c' else NONE) alias;
haftmann@31156
   482
  in
haftmann@31156
   483
    perhaps subst_inst_param
haftmann@31156
   484
    #> perhaps subst_alias
haftmann@31156
   485
  end;
haftmann@31156
   486
haftmann@31962
   487
val triv_classes = snd o the_aliasses o the_exec;
haftmann@31156
   488
haftmann@31156
   489
haftmann@31962
   490
(** foundation **)
haftmann@31962
   491
haftmann@31962
   492
(* constants *)
haftmann@31962
   493
haftmann@31962
   494
fun args_number thy = length o fst o strip_type o Sign.the_const_type thy;
haftmann@31962
   495
haftmann@31962
   496
haftmann@31962
   497
(* datatypes *)
haftmann@31156
   498
haftmann@31156
   499
fun constrset_of_consts thy cs =
haftmann@31156
   500
  let
haftmann@31156
   501
    val _ = map (fn (c, _) => if (is_some o AxClass.class_of_param thy) c
haftmann@31156
   502
      then error ("Is a class parameter: " ^ string_of_const thy c) else ()) cs;
haftmann@31156
   503
    fun no_constr (c, ty) = error ("Not a datatype constructor: " ^ string_of_const thy c
haftmann@31156
   504
      ^ " :: " ^ string_of_typ thy ty);
haftmann@31156
   505
    fun last_typ c_ty ty =
haftmann@31156
   506
      let
haftmann@31156
   507
        val frees = OldTerm.typ_tfrees ty;
haftmann@31156
   508
        val (tyco, vs) = ((apsnd o map) (dest_TFree) o dest_Type o snd o strip_type) ty
haftmann@31156
   509
          handle TYPE _ => no_constr c_ty
haftmann@31156
   510
        val _ = if has_duplicates (eq_fst (op =)) vs then no_constr c_ty else ();
haftmann@31156
   511
        val _ = if length frees <> length vs then no_constr c_ty else ();
haftmann@31156
   512
      in (tyco, vs) end;
haftmann@31156
   513
    fun ty_sorts (c, ty) =
haftmann@31156
   514
      let
haftmann@31156
   515
        val ty_decl = (Logic.unvarifyT o Sign.the_const_type thy) c;
haftmann@31156
   516
        val (tyco, _) = last_typ (c, ty) ty_decl;
haftmann@31156
   517
        val (_, vs) = last_typ (c, ty) ty;
haftmann@31156
   518
      in ((tyco, map snd vs), (c, (map fst vs, ty))) end;
haftmann@31156
   519
    fun add ((tyco', sorts'), c) ((tyco, sorts), cs) =
haftmann@31156
   520
      let
haftmann@31998
   521
        val _ = if (tyco' : string) <> tyco
haftmann@31156
   522
          then error "Different type constructors in constructor set"
haftmann@31156
   523
          else ();
haftmann@31156
   524
        val sorts'' = map2 (curry (Sorts.inter_sort (Sign.classes_of thy))) sorts' sorts
haftmann@31156
   525
      in ((tyco, sorts), c :: cs) end;
haftmann@31156
   526
    fun inst vs' (c, (vs, ty)) =
haftmann@31156
   527
      let
haftmann@31156
   528
        val the_v = the o AList.lookup (op =) (vs ~~ vs');
haftmann@31156
   529
        val ty' = map_atyps (fn TFree (v, _) => TFree (the_v v)) ty;
haftmann@31156
   530
      in (c, (fst o strip_type) ty') end;
haftmann@31156
   531
    val c' :: cs' = map ty_sorts cs;
haftmann@31156
   532
    val ((tyco, sorts), cs'') = fold add cs' (apsnd single c');
haftmann@31156
   533
    val vs = Name.names Name.context Name.aT sorts;
haftmann@31156
   534
    val cs''' = map (inst vs) cs'';
haftmann@31156
   535
  in (tyco, (vs, rev cs''')) end;
haftmann@31156
   536
haftmann@31962
   537
fun get_datatype thy tyco =
haftmann@31962
   538
  case these (Symtab.lookup ((the_dtyps o the_exec) thy) tyco)
haftmann@31962
   539
   of (_, spec) :: _ => spec
haftmann@31962
   540
    | [] => Sign.arity_number thy tyco
haftmann@31962
   541
        |> Name.invents Name.context Name.aT
haftmann@31962
   542
        |> map (rpair [])
haftmann@31962
   543
        |> rpair [];
haftmann@31962
   544
haftmann@31962
   545
fun get_datatype_of_constr thy c =
haftmann@31962
   546
  case (snd o strip_type o Sign.the_const_type thy) c
haftmann@31962
   547
   of Type (tyco, _) => if member (op =) ((map fst o snd o get_datatype thy) tyco) c
haftmann@31962
   548
       then SOME tyco else NONE
haftmann@31962
   549
    | _ => NONE;
haftmann@31962
   550
haftmann@31962
   551
fun is_constr thy = is_some o get_datatype_of_constr thy;
haftmann@31962
   552
haftmann@31156
   553
haftmann@31156
   554
(* code equations *)
haftmann@31156
   555
haftmann@31156
   556
exception BAD_THM of string;
haftmann@31156
   557
fun bad_thm msg = raise BAD_THM msg;
haftmann@31156
   558
fun error_thm f thm = f thm handle BAD_THM msg => error msg;
haftmann@31642
   559
fun warning_thm f thm = SOME (f thm) handle BAD_THM msg => (warning msg; NONE)
haftmann@31156
   560
fun try_thm f thm = SOME (f thm) handle BAD_THM _ => NONE;
haftmann@31156
   561
haftmann@31156
   562
fun is_linear thm =
haftmann@31156
   563
  let val (_, args) = (strip_comb o fst o Logic.dest_equals o Thm.plain_prop_of) thm
haftmann@31156
   564
  in not (has_duplicates (op =) ((fold o fold_aterms)
haftmann@31156
   565
    (fn Var (v, _) => cons v | _ => I) args [])) end;
haftmann@31156
   566
haftmann@31962
   567
fun gen_assert_eqn thy is_constr_pat (thm, proper) =
haftmann@31156
   568
  let
haftmann@31156
   569
    val (lhs, rhs) = (Logic.dest_equals o Thm.plain_prop_of) thm
haftmann@31156
   570
      handle TERM _ => bad_thm ("Not an equation: " ^ Display.string_of_thm thm)
haftmann@31156
   571
           | THM _ => bad_thm ("Not an equation: " ^ Display.string_of_thm thm);
haftmann@31156
   572
    fun vars_of t = fold_aterms (fn Var (v, _) => insert (op =) v
haftmann@31156
   573
      | Free _ => bad_thm ("Illegal free variable in equation\n"
haftmann@31156
   574
          ^ Display.string_of_thm thm)
haftmann@31156
   575
      | _ => I) t [];
haftmann@31156
   576
    fun tvars_of t = fold_term_types (fn _ =>
haftmann@31156
   577
      fold_atyps (fn TVar (v, _) => insert (op =) v
haftmann@31156
   578
        | TFree _ => bad_thm 
haftmann@31156
   579
      ("Illegal free type variable in equation\n" ^ Display.string_of_thm thm))) t [];
haftmann@31156
   580
    val lhs_vs = vars_of lhs;
haftmann@31156
   581
    val rhs_vs = vars_of rhs;
haftmann@31156
   582
    val lhs_tvs = tvars_of lhs;
haftmann@31156
   583
    val rhs_tvs = tvars_of rhs;
haftmann@31156
   584
    val _ = if null (subtract (op =) lhs_vs rhs_vs)
haftmann@31156
   585
      then ()
haftmann@31156
   586
      else bad_thm ("Free variables on right hand side of equation\n"
haftmann@31156
   587
        ^ Display.string_of_thm thm);
haftmann@31156
   588
    val _ = if null (subtract (op =) lhs_tvs rhs_tvs)
haftmann@31156
   589
      then ()
haftmann@31156
   590
      else bad_thm ("Free type variables on right hand side of equation\n"
haftmann@31156
   591
        ^ Display.string_of_thm thm)    val (head, args) = (strip_comb o fst o Logic.dest_equals o Thm.plain_prop_of) thm;
haftmann@31156
   592
    val (c, ty) = case head
haftmann@31156
   593
     of Const (c_ty as (_, ty)) => (AxClass.unoverload_const thy c_ty, ty)
haftmann@31156
   594
      | _ => bad_thm ("Equation not headed by constant\n" ^ Display.string_of_thm thm);
haftmann@31156
   595
    fun check _ (Abs _) = bad_thm
haftmann@31156
   596
          ("Abstraction on left hand side of equation\n"
haftmann@31156
   597
            ^ Display.string_of_thm thm)
haftmann@31156
   598
      | check 0 (Var _) = ()
haftmann@31156
   599
      | check _ (Var _) = bad_thm
haftmann@31156
   600
          ("Variable with application on left hand side of equation\n"
haftmann@31156
   601
            ^ Display.string_of_thm thm)
haftmann@31156
   602
      | check n (t1 $ t2) = (check (n+1) t1; check 0 t2)
haftmann@31156
   603
      | check n (Const (c_ty as (c, ty))) = if n = (length o fst o strip_type) ty
haftmann@31156
   604
          then if not proper orelse is_constr_pat (AxClass.unoverload_const thy c_ty)
haftmann@31156
   605
            then ()
haftmann@31156
   606
            else bad_thm (quote c ^ " is not a constructor, on left hand side of equation\n"
haftmann@31156
   607
              ^ Display.string_of_thm thm)
haftmann@31156
   608
          else bad_thm
haftmann@31156
   609
            ("Partially applied constant " ^ quote c ^ " on left hand side of equation\n"
haftmann@31156
   610
               ^ Display.string_of_thm thm);
haftmann@31156
   611
    val _ = map (check 0) args;
haftmann@31156
   612
    val _ = if not proper orelse is_linear thm then ()
haftmann@31156
   613
      else bad_thm ("Duplicate variables on left hand side of equation\n"
haftmann@31156
   614
        ^ Display.string_of_thm thm);
haftmann@31156
   615
    val _ = if (is_none o AxClass.class_of_param thy) c
haftmann@31156
   616
      then ()
haftmann@31156
   617
      else bad_thm ("Polymorphic constant as head in equation\n"
haftmann@31156
   618
        ^ Display.string_of_thm thm)
haftmann@31962
   619
    val _ = if not (is_constr thy c)
haftmann@31156
   620
      then ()
haftmann@31156
   621
      else bad_thm ("Constructor as head in equation\n"
haftmann@31156
   622
        ^ Display.string_of_thm thm)
haftmann@31156
   623
    val ty_decl = Sign.the_const_type thy c;
haftmann@31156
   624
    val _ = if Sign.typ_equiv thy (Type.strip_sorts ty_decl, Type.strip_sorts ty)
haftmann@31156
   625
      then () else bad_thm ("Type\n" ^ string_of_typ thy ty
haftmann@31156
   626
           ^ "\nof equation\n"
haftmann@31156
   627
           ^ Display.string_of_thm thm
haftmann@31156
   628
           ^ "\nis incompatible with declared function type\n"
haftmann@31156
   629
           ^ string_of_typ thy ty_decl)
haftmann@31156
   630
  in (thm, proper) end;
haftmann@31156
   631
haftmann@31962
   632
fun assert_eqn thy = error_thm (gen_assert_eqn thy (is_constr thy));
haftmann@31962
   633
haftmann@31962
   634
fun meta_rewrite thy = LocalDefs.meta_rewrite_rule (ProofContext.init thy);
haftmann@31156
   635
haftmann@31962
   636
fun mk_eqn thy = error_thm (gen_assert_eqn thy (K true)) o
haftmann@31962
   637
  apfst (meta_rewrite thy);
haftmann@31962
   638
haftmann@31962
   639
fun mk_eqn_warning thy = Option.map (fn (thm, _) => (thm, is_linear thm))
haftmann@31962
   640
  o warning_thm (gen_assert_eqn thy (K true)) o rpair false o meta_rewrite thy;
haftmann@31962
   641
haftmann@31962
   642
fun mk_eqn_liberal thy = Option.map (fn (thm, _) => (thm, is_linear thm))
haftmann@31962
   643
  o try_thm (gen_assert_eqn thy (K true)) o rpair false o meta_rewrite thy;
haftmann@31156
   644
haftmann@31156
   645
(*those following are permissive wrt. to overloaded constants!*)
haftmann@31156
   646
haftmann@31957
   647
fun const_typ_eqn thy thm =
haftmann@31156
   648
  let
haftmann@31957
   649
    val (c, ty) = (dest_Const o fst o strip_comb o fst o Logic.dest_equals o Thm.plain_prop_of) thm;
haftmann@31156
   650
    val c' = AxClass.unoverload_const thy (c, ty);
haftmann@31156
   651
  in (c', ty) end;
haftmann@31156
   652
haftmann@31957
   653
fun typscheme_eqn thy = typscheme thy o const_typ_eqn thy;
haftmann@31957
   654
fun const_eqn thy = fst o const_typ_eqn thy;
haftmann@31156
   655
haftmann@31962
   656
fun assert_eqns_const thy c eqns =
haftmann@31962
   657
  let
haftmann@31962
   658
    fun cert (eqn as (thm, _)) = if c = const_eqn thy thm
haftmann@31962
   659
      then eqn else error ("Wrong head of code equation,\nexpected constant "
haftmann@31962
   660
        ^ string_of_const thy c ^ "\n" ^ Display.string_of_thm thm)
haftmann@31962
   661
  in map (cert o assert_eqn thy) eqns end;
haftmann@31156
   662
haftmann@31962
   663
fun common_typ_eqns thy [] = []
haftmann@31962
   664
  | common_typ_eqns thy [thm] = [thm]
haftmann@31962
   665
  | common_typ_eqns thy (thms as thm :: _) = (*FIXME is too general*)
haftmann@31962
   666
      let
haftmann@31962
   667
        fun incr_thm thm max =
haftmann@31962
   668
          let
haftmann@31962
   669
            val thm' = incr_indexes max thm;
haftmann@31962
   670
            val max' = Thm.maxidx_of thm' + 1;
haftmann@31962
   671
          in (thm', max') end;
haftmann@31962
   672
        val (thms', maxidx) = fold_map incr_thm thms 0;
haftmann@31962
   673
        val ty1 :: tys = map (snd o const_typ_eqn thy) thms';
haftmann@31962
   674
        fun unify ty env = Sign.typ_unify thy (ty1, ty) env
haftmann@31962
   675
          handle Type.TUNIFY =>
haftmann@31962
   676
            error ("Type unificaton failed, while unifying code equations\n"
haftmann@31962
   677
            ^ (cat_lines o map Display.string_of_thm) thms
haftmann@31962
   678
            ^ "\nwith types\n"
haftmann@31962
   679
            ^ (cat_lines o map (string_of_typ thy)) (ty1 :: tys));
haftmann@31962
   680
        val (env, _) = fold unify tys (Vartab.empty, maxidx)
haftmann@31962
   681
        val instT = Vartab.fold (fn (x_i, (sort, ty)) =>
haftmann@31962
   682
          cons (Thm.ctyp_of thy (TVar (x_i, sort)), Thm.ctyp_of thy ty)) env [];
haftmann@31962
   683
      in map (Thm.instantiate (instT, [])) thms' end;
haftmann@31962
   684
haftmann@31962
   685
fun these_eqns thy c =
haftmann@31962
   686
  get_eqns thy c
haftmann@31962
   687
  |> (map o apfst) (Thm.transfer thy)
haftmann@31962
   688
  |> burrow_fst (common_typ_eqns thy);
haftmann@31962
   689
haftmann@31962
   690
fun all_eqns thy =
haftmann@31962
   691
  Symtab.dest ((the_eqns o the_exec) thy)
haftmann@31962
   692
  |> maps (Lazy.force o snd o snd o fst o snd);
haftmann@31962
   693
haftmann@31962
   694
haftmann@31962
   695
(* cases *)
haftmann@31156
   696
haftmann@31156
   697
fun case_certificate thm =
haftmann@31156
   698
  let
haftmann@31156
   699
    val ((head, raw_case_expr), cases) = (apfst Logic.dest_equals
haftmann@31156
   700
      o apsnd Logic.dest_conjunctions o Logic.dest_implies o Thm.prop_of) thm;
haftmann@31156
   701
    val _ = case head of Free _ => true
haftmann@31156
   702
      | Var _ => true
haftmann@31156
   703
      | _ => raise TERM ("case_cert", []);
haftmann@31156
   704
    val ([(case_var, _)], case_expr) = Term.strip_abs_eta 1 raw_case_expr;
haftmann@31156
   705
    val (Const (case_const, _), raw_params) = strip_comb case_expr;
haftmann@31156
   706
    val n = find_index (fn Free (v, _) => v = case_var | _ => false) raw_params;
haftmann@31156
   707
    val _ = if n = ~1 then raise TERM ("case_cert", []) else ();
haftmann@31156
   708
    val params = map (fst o dest_Var) (nth_drop n raw_params);
haftmann@31156
   709
    fun dest_case t =
haftmann@31156
   710
      let
haftmann@31156
   711
        val (head' $ t_co, rhs) = Logic.dest_equals t;
haftmann@31156
   712
        val _ = if head' = head then () else raise TERM ("case_cert", []);
haftmann@31156
   713
        val (Const (co, _), args) = strip_comb t_co;
haftmann@31156
   714
        val (Var (param, _), args') = strip_comb rhs;
haftmann@31156
   715
        val _ = if args' = args then () else raise TERM ("case_cert", []);
haftmann@31156
   716
      in (param, co) end;
haftmann@31156
   717
    fun analyze_cases cases =
haftmann@31156
   718
      let
haftmann@31156
   719
        val co_list = fold (AList.update (op =) o dest_case) cases [];
haftmann@31156
   720
      in map (the o AList.lookup (op =) co_list) params end;
haftmann@31156
   721
    fun analyze_let t =
haftmann@31156
   722
      let
haftmann@31156
   723
        val (head' $ arg, Var (param', _) $ arg') = Logic.dest_equals t;
haftmann@31156
   724
        val _ = if head' = head then () else raise TERM ("case_cert", []);
haftmann@31156
   725
        val _ = if arg' = arg then () else raise TERM ("case_cert", []);
haftmann@31156
   726
        val _ = if [param'] = params then () else raise TERM ("case_cert", []);
haftmann@31156
   727
      in [] end;
haftmann@31156
   728
    fun analyze (cases as [let_case]) =
haftmann@31156
   729
          (analyze_cases cases handle Bind => analyze_let let_case)
haftmann@31156
   730
      | analyze cases = analyze_cases cases;
haftmann@31156
   731
  in (case_const, (n, analyze cases)) end;
haftmann@31156
   732
haftmann@31156
   733
fun case_cert thm = case_certificate thm
haftmann@31156
   734
  handle Bind => error "bad case certificate"
haftmann@31156
   735
       | TERM _ => error "bad case certificate";
haftmann@31156
   736
haftmann@31962
   737
fun get_case_scheme thy = Symtab.lookup ((fst o the_cases o the_exec) thy);
haftmann@24219
   738
haftmann@31962
   739
val undefineds = Symtab.keys o snd o the_cases o the_exec;
haftmann@24219
   740
haftmann@24219
   741
haftmann@31962
   742
(* diagnostic *)
haftmann@24219
   743
haftmann@24219
   744
fun print_codesetup thy =
haftmann@24219
   745
  let
haftmann@24219
   746
    val ctxt = ProofContext.init thy;
haftmann@24844
   747
    val exec = the_exec thy;
haftmann@28368
   748
    fun pretty_eqn (s, (_, lthms)) =
haftmann@24219
   749
      (Pretty.block o Pretty.fbreaks) (
haftmann@28143
   750
        Pretty.str s :: pretty_lthms ctxt lthms
haftmann@24219
   751
      );
haftmann@24219
   752
    fun pretty_dtyp (s, []) =
haftmann@24219
   753
          Pretty.str s
haftmann@24219
   754
      | pretty_dtyp (s, cos) =
haftmann@24219
   755
          (Pretty.block o Pretty.breaks) (
haftmann@24219
   756
            Pretty.str s
haftmann@24219
   757
            :: Pretty.str "="
haftmann@31156
   758
            :: separate (Pretty.str "|") (map (fn (c, []) => Pretty.str (string_of_const thy c)
haftmann@24219
   759
                 | (c, tys) =>
haftmann@24219
   760
                     (Pretty.block o Pretty.breaks)
haftmann@31156
   761
                        (Pretty.str (string_of_const thy c)
wenzelm@26947
   762
                          :: Pretty.str "of"
wenzelm@26947
   763
                          :: map (Pretty.quote o Syntax.pretty_typ_global thy) tys)) cos)
haftmann@24219
   764
          );
haftmann@28368
   765
    val eqns = the_eqns exec
haftmann@24423
   766
      |> Symtab.dest
haftmann@31156
   767
      |> (map o apfst) (string_of_const thy)
haftmann@28695
   768
      |> (map o apsnd) (snd o fst)
haftmann@24219
   769
      |> sort (string_ord o pairself fst);
haftmann@24219
   770
    val dtyps = the_dtyps exec
haftmann@24219
   771
      |> Symtab.dest
haftmann@28695
   772
      |> map (fn (dtco, (_, (vs, cos)) :: _) =>
haftmann@31957
   773
          (string_of_typ thy (Type (dtco, map TFree vs)), cos))
haftmann@24219
   774
      |> sort (string_ord o pairself fst)
haftmann@24219
   775
  in
haftmann@24219
   776
    (Pretty.writeln o Pretty.chunks) [
haftmann@24219
   777
      Pretty.block (
haftmann@30023
   778
        Pretty.str "code equations:"
haftmann@24219
   779
        :: Pretty.fbrk
haftmann@28368
   780
        :: (Pretty.fbreaks o map pretty_eqn) eqns
haftmann@24219
   781
      ),
haftmann@25968
   782
      Pretty.block (
haftmann@24219
   783
        Pretty.str "datatypes:"
haftmann@24219
   784
        :: Pretty.fbrk
haftmann@24219
   785
        :: (Pretty.fbreaks o map pretty_dtyp) dtyps
haftmann@24219
   786
      )
haftmann@24219
   787
    ]
haftmann@24219
   788
  end;
haftmann@24219
   789
haftmann@24219
   790
haftmann@31962
   791
(** declaring executable ingredients **)
haftmann@31962
   792
haftmann@31962
   793
(* constant aliasses *)
haftmann@24219
   794
haftmann@31962
   795
fun add_const_alias thm thy =
haftmann@31962
   796
  let
haftmann@31962
   797
    val (ofclass, eqn) = case try Logic.dest_equals (Thm.prop_of thm)
haftmann@31962
   798
     of SOME ofclass_eq => ofclass_eq
haftmann@31962
   799
      | _ => error ("Bad certificate: " ^ Display.string_of_thm thm);
haftmann@31962
   800
    val (T, class) = case try Logic.dest_of_class ofclass
haftmann@31962
   801
     of SOME T_class => T_class
haftmann@31962
   802
      | _ => error ("Bad certificate: " ^ Display.string_of_thm thm);
haftmann@31962
   803
    val tvar = case try Term.dest_TVar T
haftmann@31962
   804
     of SOME tvar => tvar
haftmann@31962
   805
      | _ => error ("Bad type: " ^ Display.string_of_thm thm);
haftmann@31962
   806
    val _ = if Term.add_tvars eqn [] = [tvar] then ()
haftmann@31962
   807
      else error ("Inconsistent type: " ^ Display.string_of_thm thm);
haftmann@31962
   808
    val lhs_rhs = case try Logic.dest_equals eqn
haftmann@31962
   809
     of SOME lhs_rhs => lhs_rhs
haftmann@31962
   810
      | _ => error ("Not an equation: " ^ Syntax.string_of_term_global thy eqn);
haftmann@31962
   811
    val c_c' = case try (pairself (check_const thy)) lhs_rhs
haftmann@31962
   812
     of SOME c_c' => c_c'
haftmann@31962
   813
      | _ => error ("Not an equation with two constants: "
haftmann@31962
   814
          ^ Syntax.string_of_term_global thy eqn);
haftmann@31962
   815
    val _ = if the_list (AxClass.class_of_param thy (snd c_c')) = [class] then ()
haftmann@31962
   816
      else error ("Inconsistent class: " ^ Display.string_of_thm thm);
haftmann@31962
   817
  in thy |>
haftmann@31962
   818
    (map_exec_purge NONE o map_aliasses) (fn (alias, classes) =>
haftmann@31962
   819
      ((c_c', thm) :: alias, insert (op =) class classes))
haftmann@31962
   820
  end;
haftmann@24219
   821
haftmann@24219
   822
haftmann@31962
   823
(* datatypes *)
haftmann@31090
   824
haftmann@31962
   825
structure Type_Interpretation = InterpretationFun(type T = string * serial val eq = eq_snd (op =) : T * T -> bool);
haftmann@25462
   826
haftmann@24423
   827
fun add_datatype raw_cs thy =
haftmann@24219
   828
  let
haftmann@25597
   829
    val cs = map (fn c_ty as (_, ty) => (AxClass.unoverload_const thy c_ty, ty)) raw_cs;
haftmann@31156
   830
    val (tyco, vs_cos) = constrset_of_consts thy cs;
haftmann@30076
   831
    val old_cs = (map fst o snd o get_datatype thy) tyco;
haftmann@30076
   832
    fun drop_outdated_cases cases = fold Symtab.delete_safe
haftmann@30076
   833
      (Symtab.fold (fn (c, (_, (_, cos))) =>
haftmann@30076
   834
        if exists (member (op =) old_cs) cos
haftmann@30076
   835
          then insert (op =) c else I) cases []) cases;
haftmann@24219
   836
  in
haftmann@24219
   837
    thy
haftmann@31091
   838
    |> fold (del_eqns o fst) cs
haftmann@28703
   839
    |> map_exec_purge NONE
haftmann@28695
   840
        ((map_dtyps o Symtab.map_default (tyco, [])) (cons (serial (), vs_cos))
haftmann@30076
   841
        #> (map_cases o apfst) drop_outdated_cases)
haftmann@31962
   842
    |> Type_Interpretation.data (tyco, serial ())
haftmann@24219
   843
  end;
haftmann@24219
   844
haftmann@31962
   845
fun type_interpretation f =  Type_Interpretation.interpretation
haftmann@25485
   846
  (fn (tyco, _) => fn thy => f (tyco, get_datatype thy tyco) thy);
haftmann@25485
   847
haftmann@24423
   848
fun add_datatype_cmd raw_cs thy =
haftmann@24423
   849
  let
haftmann@31156
   850
    val cs = map (read_bare_const thy) raw_cs;
haftmann@24423
   851
  in add_datatype cs thy end;
haftmann@24219
   852
haftmann@31962
   853
haftmann@31962
   854
(* code equations *)
haftmann@31962
   855
haftmann@31962
   856
fun gen_add_eqn default (eqn as (thm, _)) thy =
haftmann@31962
   857
  let val c = const_eqn thy thm
haftmann@31962
   858
  in change_eqns false c (add_thm thy default eqn) thy end;
haftmann@31962
   859
haftmann@31962
   860
fun add_eqn thm thy =
haftmann@31962
   861
  gen_add_eqn false (mk_eqn thy (thm, true)) thy;
haftmann@31962
   862
haftmann@31962
   863
fun add_warning_eqn thm thy =
haftmann@31962
   864
  case mk_eqn_warning thy thm
haftmann@31962
   865
   of SOME eqn => gen_add_eqn false eqn thy
haftmann@31962
   866
    | NONE => thy;
haftmann@31962
   867
haftmann@31962
   868
fun add_default_eqn thm thy =
haftmann@31962
   869
  case mk_eqn_liberal thy thm
haftmann@31962
   870
   of SOME eqn => gen_add_eqn true eqn thy
haftmann@31962
   871
    | NONE => thy;
haftmann@31962
   872
haftmann@31962
   873
fun add_nbe_eqn thm thy =
haftmann@31962
   874
  gen_add_eqn false (mk_eqn thy (thm, false)) thy;
haftmann@31962
   875
haftmann@31962
   876
fun add_eqnl (c, lthms) thy =
haftmann@31962
   877
  let
haftmann@31962
   878
    val lthms' = certificate thy (fn thy => assert_eqns_const thy c) lthms;
haftmann@31962
   879
  in change_eqns false c (add_lthms lthms') thy end;
haftmann@31962
   880
haftmann@31962
   881
val add_default_eqn_attribute = Thm.declaration_attribute
haftmann@31962
   882
  (fn thm => Context.mapping (add_default_eqn thm) I);
haftmann@31962
   883
val add_default_eqn_attrib = Attrib.internal (K add_default_eqn_attribute);
haftmann@31962
   884
haftmann@31962
   885
fun del_eqn thm thy = case mk_eqn_liberal thy thm
haftmann@31962
   886
 of SOME (thm, _) => change_eqns true (const_eqn thy thm) (del_thm thm) thy
haftmann@31962
   887
  | NONE => thy;
haftmann@31962
   888
haftmann@32070
   889
(* c.f. src/HOL/Tools/recfun_codegen.ML *)
haftmann@32070
   890
haftmann@32070
   891
structure Code_Target_Attr = TheoryDataFun (
haftmann@31998
   892
  type T = (string -> thm -> theory -> theory) option;
haftmann@31998
   893
  val empty = NONE;
haftmann@31998
   894
  val copy = I;
haftmann@31998
   895
  val extend = I;
haftmann@31998
   896
  fun merge _ (NONE, f2) = f2
haftmann@31998
   897
    | merge _ (f1, _) = f1;
haftmann@31998
   898
);
haftmann@31998
   899
haftmann@32070
   900
fun set_code_target_attr f = Code_Target_Attr.map (K (SOME f));
haftmann@32070
   901
haftmann@32070
   902
fun code_target_attr prefix thm thy =
haftmann@32070
   903
  let
haftmann@32070
   904
    val attr = the_default ((K o K) I) (Code_Target_Attr.get thy);
haftmann@32070
   905
  in thy |> add_warning_eqn thm |> attr prefix thm end;
haftmann@32070
   906
haftmann@32070
   907
(* setup *)
haftmann@31998
   908
haftmann@31962
   909
val _ = Context.>> (Context.map_theory
haftmann@31962
   910
  (let
haftmann@31962
   911
    fun mk_attribute f = Thm.declaration_attribute (fn thm => Context.mapping (f thm) I);
haftmann@31998
   912
    val code_attribute_parser =
haftmann@31998
   913
      Args.del |-- Scan.succeed (mk_attribute del_eqn)
haftmann@31998
   914
      || Args.$$$ "nbe" |-- Scan.succeed (mk_attribute add_nbe_eqn)
haftmann@31998
   915
      || (Args.$$$ "target" |-- Args.colon |-- Args.name >>
haftmann@32070
   916
           (mk_attribute o code_target_attr))
haftmann@31998
   917
      || Scan.succeed (mk_attribute add_warning_eqn);
haftmann@31962
   918
  in
haftmann@31962
   919
    Type_Interpretation.init
haftmann@31998
   920
    #> Attrib.setup (Binding.name "code") (Scan.lift code_attribute_parser)
haftmann@31998
   921
        "declare theorems for code generation"
haftmann@31962
   922
  end));
haftmann@31962
   923
haftmann@31962
   924
haftmann@31962
   925
(* cases *)
haftmann@31962
   926
haftmann@24844
   927
fun add_case thm thy =
haftmann@24844
   928
  let
haftmann@31156
   929
    val (c, (k, case_pats)) = case_cert thm;
haftmann@31088
   930
    val _ = case filter_out (is_constr thy) case_pats
haftmann@30076
   931
     of [] => ()
haftmann@30076
   932
      | cs => error ("Non-constructor(s) in case certificate: " ^ commas (map quote cs));
haftmann@30076
   933
    val entry = (1 + Int.max (1, length case_pats), (k, case_pats))
haftmann@30076
   934
  in (map_exec_purge (SOME [c]) o map_cases o apfst) (Symtab.update (c, entry)) thy end;
haftmann@24844
   935
haftmann@24844
   936
fun add_undefined c thy =
haftmann@24844
   937
  (map_exec_purge (SOME [c]) o map_cases o apsnd) (Symtab.update (c, ())) thy;
haftmann@24844
   938
haftmann@24219
   939
end; (*struct*)
haftmann@24219
   940
haftmann@24219
   941
haftmann@31962
   942
(** type-safe interfaces for data depedent on executable code **)
haftmann@24219
   943
haftmann@31962
   944
functor Code_Data_Fun(Data: CODE_DATA_ARGS): CODE_DATA =
haftmann@24219
   945
struct
haftmann@24219
   946
haftmann@24219
   947
type T = Data.T;
haftmann@24219
   948
exception Data of T;
haftmann@24219
   949
fun dest (Data x) = x
haftmann@24219
   950
haftmann@24219
   951
val kind = Code.declare_data (Data Data.empty)
haftmann@27609
   952
  (fn thy => fn cs => fn Data x => Data (Data.purge thy cs x));
haftmann@24219
   953
haftmann@24219
   954
val data_op = (kind, Data, dest);
haftmann@24219
   955
haftmann@24219
   956
val get = Code.get_data data_op;
haftmann@24219
   957
val change = Code.change_data data_op;
haftmann@24219
   958
fun change_yield thy = Code.change_yield_data data_op thy;
haftmann@24219
   959
haftmann@24219
   960
end;
haftmann@24219
   961
haftmann@28143
   962
structure Code : CODE = struct open Code; end;