src/Tools/code/code_thingol.ML
author haftmann
Fri Oct 24 17:48:42 2008 +0200 (2008-10-24)
changeset 28688 1a9fabb515cd
parent 28663 bd8438543bf2
child 28706 3fef773ae6b1
permissions -rw-r--r--
"fun" gained a more uniform status
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(*  Title:      Tools/code/code_thingol.ML
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    ID:         $Id$
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    Author:     Florian Haftmann, TU Muenchen
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Intermediate language ("Thin-gol") representing executable code.
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Representation and translation.
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*)
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infix 8 `%%;
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infix 4 `$;
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infix 4 `$$;
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infixr 3 `|->;
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infixr 3 `|-->;
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signature BASIC_CODE_THINGOL =
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sig
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  type vname = string;
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  datatype dict =
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      DictConst of string * dict list list
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    | DictVar of string list * (vname * (int * int));
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  datatype itype =
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      `%% of string * itype list
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    | ITyVar of vname;
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  type const = string * (dict list list * itype list (*types of arguments*))
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  datatype iterm =
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      IConst of const
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    | IVar of vname
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    | `$ of iterm * iterm
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    | `|-> of (vname * itype) * iterm
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    | ICase of ((iterm * itype) * (iterm * iterm) list) * iterm;
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        (*((term, type), [(selector pattern, body term )]), primitive term)*)
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  val `$$ : iterm * iterm list -> iterm;
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  val `|--> : (vname * itype) list * iterm -> iterm;
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  type typscheme = (vname * sort) list * itype;
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end;
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signature CODE_THINGOL =
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sig
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  include BASIC_CODE_THINGOL
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  val unfoldl: ('a -> ('a * 'b) option) -> 'a -> 'a * 'b list
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  val unfoldr: ('a -> ('b * 'a) option) -> 'a -> 'b list * 'a
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  val unfold_fun: itype -> itype list * itype
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  val unfold_app: iterm -> iterm * iterm list
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  val split_abs: iterm -> (((vname * iterm option) * itype) * iterm) option
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  val unfold_abs: iterm -> ((vname * iterm option) * itype) list * iterm
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  val split_let: iterm -> (((iterm * itype) * iterm) * iterm) option
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  val unfold_let: iterm -> ((iterm * itype) * iterm) list * iterm
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  val unfold_const_app: iterm ->
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    ((string * (dict list list * itype list)) * iterm list) option
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  val collapse_let: ((vname * itype) * iterm) * iterm
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    -> (iterm * itype) * (iterm * iterm) list
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  val eta_expand: int -> (string * (dict list list * itype list)) * iterm list -> iterm
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  val contains_dictvar: iterm -> bool
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  val locally_monomorphic: iterm -> bool
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  val fold_constnames: (string -> 'a -> 'a) -> iterm -> 'a -> 'a
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  val fold_varnames: (string -> 'a -> 'a) -> iterm -> 'a -> 'a
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  val fold_unbound_varnames: (string -> 'a -> 'a) -> iterm -> 'a -> 'a
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  type naming
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  val lookup_class: naming -> class -> string option
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  val lookup_classrel: naming -> class * class -> string option
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  val lookup_tyco: naming -> string -> string option
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  val lookup_instance: naming -> class * string -> string option
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  val lookup_const: naming -> string -> string option
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  datatype stmt =
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      NoStmt
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    | Fun of string * (typscheme * ((iterm list * iterm) * (thm * bool)) list)
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    | Datatype of string * ((vname * sort) list * (string * itype list) list)
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    | Datatypecons of string * string
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    | Class of class * (vname * ((class * string) list * (string * itype) list))
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    | Classrel of class * class
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    | Classparam of string * class
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    | Classinst of (class * (string * (vname * sort) list))
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          * ((class * (string * (string * dict list list))) list
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        * ((string * const) * (thm * bool)) list)
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  type program = stmt Graph.T
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  val empty_funs: program -> string list
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  val map_terms_bottom_up: (iterm -> iterm) -> iterm -> iterm
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  val map_terms_stmt: (iterm -> iterm) -> stmt -> stmt
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  val is_cons: program -> string -> bool
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  val contr_classparam_typs: program -> string -> itype option list
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  val consts_program: theory -> string list -> string list * (naming * program)
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  val cached_program: theory -> naming * program
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  val eval_conv: theory
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    -> (term -> term * (naming -> program -> typscheme * iterm -> string list -> thm))
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    -> cterm -> thm
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  val eval_term: theory
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    -> (term -> term * (naming -> program -> typscheme * iterm -> string list -> 'a))
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    -> term -> 'a
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end;
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structure Code_Thingol: CODE_THINGOL =
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struct
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(** auxiliary **)
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fun unfoldl dest x =
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  case dest x
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   of NONE => (x, [])
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    | SOME (x1, x2) =>
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        let val (x', xs') = unfoldl dest x1 in (x', xs' @ [x2]) end;
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fun unfoldr dest x =
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  case dest x
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   of NONE => ([], x)
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    | SOME (x1, x2) =>
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        let val (xs', x') = unfoldr dest x2 in (x1::xs', x') end;
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(** language core - types, patterns, expressions **)
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type vname = string;
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datatype dict =
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    DictConst of string * dict list list
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  | DictVar of string list * (vname * (int * int));
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datatype itype =
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    `%% of string * itype list
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  | ITyVar of vname;
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type const = string * (dict list list * itype list (*types of arguments*))
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datatype iterm =
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    IConst of const
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  | IVar of vname
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  | `$ of iterm * iterm
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  | `|-> of (vname * itype) * iterm
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  | ICase of ((iterm * itype) * (iterm * iterm) list) * iterm;
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    (*see also signature*)
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(*
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  variable naming conventions
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  bare names:
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    variable names          v
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    class names             class
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    type constructor names  tyco
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    datatype names          dtco
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    const names (general)   c (const)
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    constructor names       co
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    class parameter names   classparam
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    arbitrary name          s
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    v, c, co, classparam also annotated with types etc.
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  constructs:
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    sort                    sort
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    type parameters         vs
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    type                    ty
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    type schemes            tysm
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    term                    t
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    (term as pattern)       p
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    instance (class, tyco)  inst
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 *)
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val op `$$ = Library.foldl (op `$);
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val op `|--> = Library.foldr (op `|->);
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val unfold_app = unfoldl
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  (fn op `$ t => SOME t
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    | _ => NONE);
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val split_abs =
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  (fn (v, ty) `|-> (t as ICase (((IVar w, _), [(p, t')]), _)) =>
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        if v = w then SOME (((v, SOME p), ty), t') else SOME (((v, NONE), ty), t)
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    | (v, ty) `|-> t => SOME (((v, NONE), ty), t)
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    | _ => NONE);
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val unfold_abs = unfoldr split_abs;
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val split_let = 
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  (fn ICase (((td, ty), [(p, t)]), _) => SOME (((p, ty), td), t)
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    | _ => NONE);
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val unfold_let = unfoldr split_let;
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fun unfold_const_app t =
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 case unfold_app t
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  of (IConst c, ts) => SOME (c, ts)
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   | _ => NONE;
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fun fold_aiterms f (t as IConst _) = f t
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  | fold_aiterms f (t as IVar _) = f t
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  | fold_aiterms f (t1 `$ t2) = fold_aiterms f t1 #> fold_aiterms f t2
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  | fold_aiterms f (t as _ `|-> t') = f t #> fold_aiterms f t'
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  | fold_aiterms f (ICase (_, t)) = fold_aiterms f t;
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fun fold_constnames f =
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  let
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    fun add (IConst (c, _)) = f c
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      | add _ = I;
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  in fold_aiterms add end;
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fun fold_varnames f =
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  let
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    fun add (IVar v) = f v
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      | add ((v, _) `|-> _) = f v
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      | add _ = I;
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  in fold_aiterms add end;
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fun fold_unbound_varnames f =
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  let
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    fun add _ (IConst _) = I
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      | add vs (IVar v) = if not (member (op =) vs v) then f v else I
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      | add vs (t1 `$ t2) = add vs t1 #> add vs t2
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      | add vs ((v, _) `|-> t) = add (insert (op =) v vs) t
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      | add vs (ICase (_, t)) = add vs t;
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  in add [] end;
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fun collapse_let (((v, ty), se), be as ICase (((IVar w, _), ds), _)) =
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      let
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        fun exists_v t = fold_unbound_varnames (fn w => fn b =>
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          b orelse v = w) t false;
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      in if v = w andalso forall (fn (t1, t2) =>
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        exists_v t1 orelse not (exists_v t2)) ds
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        then ((se, ty), ds)
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        else ((se, ty), [(IVar v, be)])
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      end
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  | collapse_let (((v, ty), se), be) =
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      ((se, ty), [(IVar v, be)])
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fun eta_expand k (c as (_, (_, tys)), ts) =
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  let
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    val j = length ts;
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    val l = k - j;
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    val ctxt = (fold o fold_varnames) Name.declare ts Name.context;
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    val vs_tys = Name.names ctxt "a" ((curry Library.take l o curry Library.drop j) tys);
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  in vs_tys `|--> IConst c `$$ ts @ map (fn (v, _) => IVar v) vs_tys end;
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fun contains_dictvar t =
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  let
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    fun contains (DictConst (_, dss)) = (fold o fold) contains dss
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      | contains (DictVar _) = K true;
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  in
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    fold_aiterms
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      (fn IConst (_, (dss, _)) => (fold o fold) contains dss | _ => I) t false
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  end;
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fun locally_monomorphic (IConst _) = false
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  | locally_monomorphic (IVar _) = true
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  | locally_monomorphic (t `$ _) = locally_monomorphic t
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  | locally_monomorphic (_ `|-> t) = locally_monomorphic t
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  | locally_monomorphic (ICase ((_, ds), _)) = exists (locally_monomorphic o snd) ds;
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(** namings **)
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(* policies *)
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local
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  fun thyname_of thy f x = the (AList.lookup (op =) (f x) Markup.theory_nameN);
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  fun thyname_of_class thy =
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    thyname_of thy (ProofContext.query_class (ProofContext.init thy));
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  fun thyname_of_tyco thy =
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    thyname_of thy (Type.the_tags (Sign.tsig_of thy));
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  fun thyname_of_instance thy inst = case AxClass.arity_property thy inst Markup.theory_nameN
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   of [] => error ("no such instance: " ^ quote (snd inst ^ " :: " ^ fst inst))
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    | thyname :: _ => thyname;
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  fun thyname_of_const thy c = case Code.get_datatype_of_constr thy c
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     of SOME dtco => thyname_of_tyco thy dtco
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      | NONE => (case AxClass.class_of_param thy c
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         of SOME class => thyname_of_class thy class
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          | NONE => (case AxClass.inst_of_param thy c
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             of SOME (c, tyco) => thyname_of_instance thy
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                  ((the o AxClass.class_of_param thy) c, tyco)
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              | NONE => thyname_of thy (Consts.the_tags (Sign.consts_of thy)) c));
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  fun namify thy get_basename get_thyname name =
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    let
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      val prefix = get_thyname thy name;
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      val base = (Code_Name.purify_base true o get_basename) name;
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    in NameSpace.append prefix base end;
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in
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fun namify_class thy = namify thy NameSpace.base thyname_of_class;
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fun namify_classrel thy = namify thy (fn (class1, class2) => 
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  NameSpace.base class2 ^ "_" ^ NameSpace.base class1) (fn thy => thyname_of_class thy o fst);
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  (*order fits nicely with composed projections*)
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fun namify_tyco thy "fun" = "Pure.fun"
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  | namify_tyco thy tyco = namify thy NameSpace.base thyname_of_tyco tyco;
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fun namify_instance thy = namify thy (fn (class, tyco) => 
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  NameSpace.base class ^ "_" ^ NameSpace.base tyco) thyname_of_instance;
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fun namify_const thy = namify thy NameSpace.base thyname_of_const;
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end; (* local *)
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(* data *)
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structure StringPairTab = Code_Name.StringPairTab;
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datatype naming = Naming of {
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  class: class Symtab.table * Name.context,
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  classrel: string StringPairTab.table * Name.context,
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  tyco: string Symtab.table * Name.context,
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  instance: string StringPairTab.table * Name.context,
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  const: string Symtab.table * Name.context
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}
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fun dest_Naming (Naming naming) = naming;
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val empty_naming = Naming {
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  class = (Symtab.empty, Name.context),
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  classrel = (StringPairTab.empty, Name.context),
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  tyco = (Symtab.empty, Name.context),
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  instance = (StringPairTab.empty, Name.context),
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  const = (Symtab.empty, Name.context)
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};
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local
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  fun mk_naming (class, classrel, tyco, instance, const) =
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    Naming { class = class, classrel = classrel,
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      tyco = tyco, instance = instance, const = const };
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  fun map_naming f (Naming { class, classrel, tyco, instance, const }) =
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    mk_naming (f (class, classrel, tyco, instance, const));
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in
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  fun map_class f = map_naming
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    (fn (class, classrel, tyco, inst, const) =>
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      (f class, classrel, tyco, inst, const));
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  fun map_classrel f = map_naming
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    (fn (class, classrel, tyco, inst, const) =>
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      (class, f classrel, tyco, inst, const));
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  fun map_tyco f = map_naming
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    (fn (class, classrel, tyco, inst, const) =>
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      (class, classrel, f tyco, inst, const));
haftmann@28663
   328
  fun map_instance f = map_naming
haftmann@28663
   329
    (fn (class, classrel, tyco, inst, const) =>
haftmann@28663
   330
      (class, classrel, tyco, f inst, const));
haftmann@28663
   331
  fun map_const f = map_naming
haftmann@28663
   332
    (fn (class, classrel, tyco, inst, const) =>
haftmann@28663
   333
      (class, classrel, tyco, inst, f const));
haftmann@28663
   334
end; (*local*)
haftmann@28663
   335
haftmann@28663
   336
fun add_variant update (thing, name) (tab, used) =
haftmann@28663
   337
  let
haftmann@28663
   338
    val (name', used') = yield_singleton Name.variants name used;
haftmann@28663
   339
    val tab' = update (thing, name') tab;
haftmann@28663
   340
  in (tab', used') end;
haftmann@28663
   341
haftmann@28663
   342
fun declare thy mapp lookup update namify thing =
haftmann@28663
   343
  mapp (add_variant update (thing, namify thy thing))
haftmann@28663
   344
  #> `(fn naming => the (lookup naming thing));
haftmann@28663
   345
haftmann@28688
   346
haftmann@28688
   347
(* lookup and declare *)
haftmann@28688
   348
haftmann@28688
   349
local
haftmann@28688
   350
haftmann@28688
   351
val suffix_class = "class";
haftmann@28688
   352
val suffix_classrel = "classrel"
haftmann@28688
   353
val suffix_tyco = "tyco";
haftmann@28688
   354
val suffix_instance = "inst";
haftmann@28688
   355
val suffix_const = "const";
haftmann@28688
   356
haftmann@28688
   357
fun add_suffix nsp NONE = NONE
haftmann@28688
   358
  | add_suffix nsp (SOME name) = SOME (NameSpace.append name nsp);
haftmann@28688
   359
haftmann@28688
   360
in
haftmann@28688
   361
haftmann@28663
   362
val lookup_class = add_suffix suffix_class
haftmann@28663
   363
  oo Symtab.lookup o fst o #class o dest_Naming;
haftmann@28663
   364
val lookup_classrel = add_suffix suffix_classrel
haftmann@28663
   365
  oo StringPairTab.lookup o fst o #classrel o dest_Naming;
haftmann@28663
   366
val lookup_tyco = add_suffix suffix_tyco
haftmann@28663
   367
  oo Symtab.lookup o fst o #tyco o dest_Naming;
haftmann@28663
   368
val lookup_instance = add_suffix suffix_instance
haftmann@28663
   369
  oo StringPairTab.lookup o fst o #instance o dest_Naming;
haftmann@28663
   370
val lookup_const = add_suffix suffix_const
haftmann@28663
   371
  oo Symtab.lookup o fst o #const o dest_Naming;
haftmann@28663
   372
haftmann@28663
   373
fun declare_class thy = declare thy map_class
haftmann@28663
   374
  lookup_class Symtab.update_new namify_class;
haftmann@28663
   375
fun declare_classrel thy = declare thy map_classrel
haftmann@28663
   376
  lookup_classrel StringPairTab.update_new namify_classrel;
haftmann@28663
   377
fun declare_tyco thy = declare thy map_tyco
haftmann@28663
   378
  lookup_tyco Symtab.update_new namify_tyco;
haftmann@28663
   379
fun declare_instance thy = declare thy map_instance
haftmann@28663
   380
  lookup_instance StringPairTab.update_new namify_instance;
haftmann@28663
   381
fun declare_const thy = declare thy map_const
haftmann@28663
   382
  lookup_const Symtab.update_new namify_const;
haftmann@28663
   383
haftmann@28688
   384
val unfold_fun = unfoldr
haftmann@28688
   385
  (fn "Pure.fun.tyco" `%% [ty1, ty2] => SOME (ty1, ty2)
haftmann@28688
   386
    | _ => NONE); (*depends on suffix_tyco and namify_tyco!*)
haftmann@28688
   387
haftmann@28688
   388
end; (* local *)
haftmann@28688
   389
haftmann@24219
   390
haftmann@27103
   391
(** statements, abstract programs **)
haftmann@24219
   392
haftmann@24219
   393
type typscheme = (vname * sort) list * itype;
haftmann@24918
   394
datatype stmt =
haftmann@27024
   395
    NoStmt
haftmann@28663
   396
  | Fun of string * (typscheme * ((iterm list * iterm) * (thm * bool)) list)
haftmann@28663
   397
  | Datatype of string * ((vname * sort) list * (string * itype list) list)
haftmann@28663
   398
  | Datatypecons of string * string
haftmann@28663
   399
  | Class of class * (vname * ((class * string) list * (string * itype) list))
haftmann@24219
   400
  | Classrel of class * class
haftmann@28663
   401
  | Classparam of string * class
haftmann@24219
   402
  | Classinst of (class * (string * (vname * sort) list))
haftmann@24219
   403
        * ((class * (string * (string * dict list list))) list
haftmann@28350
   404
      * ((string * const) * (thm * bool)) list);
haftmann@24219
   405
haftmann@27103
   406
type program = stmt Graph.T;
haftmann@24219
   407
haftmann@27103
   408
fun empty_funs program =
haftmann@28663
   409
  Graph.fold (fn (name, (Fun (c, (_, [])), _)) => cons c
haftmann@27103
   410
               | _ => I) program [];
haftmann@24219
   411
haftmann@27711
   412
fun map_terms_bottom_up f (t as IConst _) = f t
haftmann@27711
   413
  | map_terms_bottom_up f (t as IVar _) = f t
haftmann@27711
   414
  | map_terms_bottom_up f (t1 `$ t2) = f
haftmann@27711
   415
      (map_terms_bottom_up f t1 `$ map_terms_bottom_up f t2)
haftmann@27711
   416
  | map_terms_bottom_up f ((v, ty) `|-> t) = f
haftmann@27711
   417
      ((v, ty) `|-> map_terms_bottom_up f t)
haftmann@27711
   418
  | map_terms_bottom_up f (ICase (((t, ty), ps), t0)) = f
haftmann@27711
   419
      (ICase (((map_terms_bottom_up f t, ty), (map o pairself)
haftmann@27711
   420
        (map_terms_bottom_up f) ps), map_terms_bottom_up f t0));
haftmann@27711
   421
haftmann@27711
   422
fun map_terms_stmt f NoStmt = NoStmt
haftmann@28663
   423
  | map_terms_stmt f (Fun (c, (tysm, eqs))) = Fun (c, (tysm, (map o apfst)
haftmann@28663
   424
      (fn (ts, t) => (map f ts, f t)) eqs))
haftmann@27711
   425
  | map_terms_stmt f (stmt as Datatype _) = stmt
haftmann@27711
   426
  | map_terms_stmt f (stmt as Datatypecons _) = stmt
haftmann@27711
   427
  | map_terms_stmt f (stmt as Class _) = stmt
haftmann@27711
   428
  | map_terms_stmt f (stmt as Classrel _) = stmt
haftmann@27711
   429
  | map_terms_stmt f (stmt as Classparam _) = stmt
haftmann@27711
   430
  | map_terms_stmt f (Classinst (arity, (superarities, classparms))) =
haftmann@27711
   431
      Classinst (arity, (superarities, (map o apfst o apsnd) (fn const =>
haftmann@27711
   432
        case f (IConst const) of IConst const' => const') classparms));
haftmann@27711
   433
haftmann@27103
   434
fun is_cons program name = case Graph.get_node program name
haftmann@24219
   435
 of Datatypecons _ => true
haftmann@24219
   436
  | _ => false;
haftmann@24219
   437
haftmann@27103
   438
fun contr_classparam_typs program name = case Graph.get_node program name
haftmann@28663
   439
 of Classparam (_, class) => let
haftmann@28663
   440
        val Class (_, (_, (_, params))) = Graph.get_node program class;
haftmann@25621
   441
        val SOME ty = AList.lookup (op =) params name;
haftmann@25621
   442
        val (tys, res_ty) = unfold_fun ty;
haftmann@25621
   443
        fun no_tyvar (_ `%% tys) = forall no_tyvar tys
haftmann@25621
   444
          | no_tyvar (ITyVar _) = false;
haftmann@25621
   445
      in if no_tyvar res_ty
haftmann@25621
   446
        then map (fn ty => if no_tyvar ty then NONE else SOME ty) tys
haftmann@25621
   447
        else []
haftmann@25621
   448
      end
haftmann@25621
   449
  | _ => [];
haftmann@25621
   450
haftmann@24219
   451
haftmann@27103
   452
(** translation kernel **)
haftmann@24219
   453
haftmann@28663
   454
fun ensure_stmt lookup declare generate thing (dep, (naming, program)) =
haftmann@24219
   455
  let
haftmann@28663
   456
    fun add_dep name = case dep
haftmann@28663
   457
     of NONE => I | SOME dep => Graph.add_edge (dep, name);
haftmann@28663
   458
  in case lookup naming thing
haftmann@28663
   459
   of SOME name => program
haftmann@28663
   460
        |> add_dep name
haftmann@28663
   461
        |> pair naming
haftmann@28663
   462
        |> pair dep
haftmann@28663
   463
        |> pair name
haftmann@28663
   464
    | NONE => let
haftmann@28663
   465
          val (name, naming') = declare thing naming;
haftmann@28663
   466
        in
haftmann@28663
   467
          program
haftmann@28663
   468
          |> Graph.default_node (name, NoStmt)
haftmann@28663
   469
          |> add_dep name
haftmann@28663
   470
          |> pair naming'
haftmann@28663
   471
          |> curry generate (SOME name)
haftmann@28663
   472
          ||> snd
haftmann@28663
   473
          |-> (fn stmt => (apsnd o Graph.map_node name) (K stmt))
haftmann@28663
   474
          |> pair dep
haftmann@28663
   475
          |> pair name
haftmann@28663
   476
        end
haftmann@24219
   477
  end;
haftmann@24219
   478
haftmann@26972
   479
fun not_wellsorted thy thm ty sort e =
haftmann@26972
   480
  let
haftmann@26972
   481
    val err_class = Sorts.class_error (Syntax.pp_global thy) e;
haftmann@26972
   482
    val err_thm = case thm
haftmann@26972
   483
     of SOME thm => "\n(in defining equation " ^ Display.string_of_thm thm ^ ")" | NONE => "";
haftmann@26972
   484
    val err_typ = "Type " ^ Syntax.string_of_typ_global thy ty ^ " not of sort "
haftmann@26972
   485
      ^ Syntax.string_of_sort_global thy sort;
haftmann@26972
   486
  in error ("Wellsortedness error" ^ err_thm ^ ":\n" ^ err_typ ^ "\n" ^ err_class) end;
haftmann@26972
   487
haftmann@26972
   488
fun ensure_class thy (algbr as (_, algebra)) funcgr class =
haftmann@24918
   489
  let
haftmann@24918
   490
    val superclasses = (Sorts.certify_sort algebra o Sorts.super_classes algebra) class;
wenzelm@24969
   491
    val cs = #params (AxClass.get_info thy class);
haftmann@24918
   492
    val stmt_class =
haftmann@24918
   493
      fold_map (fn superclass => ensure_class thy algbr funcgr superclass
haftmann@24918
   494
        ##>> ensure_classrel thy algbr funcgr (class, superclass)) superclasses
haftmann@24918
   495
      ##>> fold_map (fn (c, ty) => ensure_const thy algbr funcgr c
haftmann@28688
   496
        ##>> translate_typ thy algbr funcgr ty) cs
haftmann@28663
   497
      #>> (fn info => Class (class, (unprefix "'" Name.aT, info)))
haftmann@28663
   498
  in ensure_stmt lookup_class (declare_class thy) stmt_class class end
haftmann@24918
   499
and ensure_classrel thy algbr funcgr (subclass, superclass) =
haftmann@24918
   500
  let
haftmann@24918
   501
    val stmt_classrel =
haftmann@24918
   502
      ensure_class thy algbr funcgr subclass
haftmann@24918
   503
      ##>> ensure_class thy algbr funcgr superclass
haftmann@24918
   504
      #>> Classrel;
haftmann@28663
   505
  in ensure_stmt lookup_classrel (declare_classrel thy) stmt_classrel (subclass, superclass) end
haftmann@28688
   506
and ensure_tyco thy algbr funcgr tyco =
haftmann@28688
   507
  let
haftmann@28688
   508
    val stmt_datatype =
haftmann@24918
   509
      let
haftmann@28688
   510
        val (vs, cos) = Code.get_datatype thy tyco;
haftmann@28688
   511
      in
haftmann@28688
   512
        fold_map (translate_tyvar_sort thy algbr funcgr) vs
haftmann@28688
   513
        ##>> fold_map (fn (c, tys) =>
haftmann@28688
   514
          ensure_const thy algbr funcgr c
haftmann@28688
   515
          ##>> fold_map (translate_typ thy algbr funcgr) tys) cos
haftmann@28688
   516
        #>> (fn info => Datatype (tyco, info))
haftmann@28688
   517
      end;
haftmann@28688
   518
  in ensure_stmt lookup_tyco (declare_tyco thy) stmt_datatype tyco end
haftmann@28688
   519
and translate_tyvar_sort thy (algbr as (proj_sort, _)) funcgr (v, sort) =
haftmann@24918
   520
  fold_map (ensure_class thy algbr funcgr) (proj_sort sort)
haftmann@24918
   521
  #>> (fn sort => (unprefix "'" v, sort))
haftmann@28688
   522
and translate_typ thy algbr funcgr (TFree v_sort) =
haftmann@28688
   523
      translate_tyvar_sort thy algbr funcgr v_sort
haftmann@24918
   524
      #>> (fn (v, sort) => ITyVar v)
haftmann@28688
   525
  | translate_typ thy algbr funcgr (Type (tyco, tys)) =
haftmann@24918
   526
      ensure_tyco thy algbr funcgr tyco
haftmann@28688
   527
      ##>> fold_map (translate_typ thy algbr funcgr) tys
haftmann@24918
   528
      #>> (fn (tyco, tys) => tyco `%% tys)
haftmann@28688
   529
and translate_dicts thy (algbr as (proj_sort, algebra)) funcgr thm (ty, sort) =
haftmann@24918
   530
  let
wenzelm@26939
   531
    val pp = Syntax.pp_global thy;
haftmann@24918
   532
    datatype typarg =
haftmann@24918
   533
        Global of (class * string) * typarg list list
haftmann@24918
   534
      | Local of (class * class) list * (string * (int * sort));
haftmann@24918
   535
    fun class_relation (Global ((_, tyco), yss), _) class =
haftmann@24918
   536
          Global ((class, tyco), yss)
haftmann@24918
   537
      | class_relation (Local (classrels, v), subclass) superclass =
haftmann@24918
   538
          Local ((subclass, superclass) :: classrels, v);
haftmann@24918
   539
    fun type_constructor tyco yss class =
haftmann@24918
   540
      Global ((class, tyco), (map o map) fst yss);
haftmann@24918
   541
    fun type_variable (TFree (v, sort)) =
haftmann@24918
   542
      let
haftmann@24918
   543
        val sort' = proj_sort sort;
haftmann@24918
   544
      in map_index (fn (n, class) => (Local ([], (v, (n, sort'))), class)) sort' end;
haftmann@24918
   545
    val typargs = Sorts.of_sort_derivation pp algebra
haftmann@24918
   546
      {class_relation = class_relation, type_constructor = type_constructor,
haftmann@26972
   547
       type_variable = type_variable} (ty, proj_sort sort)
haftmann@26972
   548
      handle Sorts.CLASS_ERROR e => not_wellsorted thy thm ty sort e;
haftmann@24918
   549
    fun mk_dict (Global (inst, yss)) =
haftmann@24918
   550
          ensure_inst thy algbr funcgr inst
haftmann@24918
   551
          ##>> (fold_map o fold_map) mk_dict yss
haftmann@24918
   552
          #>> (fn (inst, dss) => DictConst (inst, dss))
haftmann@24918
   553
      | mk_dict (Local (classrels, (v, (k, sort)))) =
haftmann@24918
   554
          fold_map (ensure_classrel thy algbr funcgr) classrels
haftmann@24918
   555
          #>> (fn classrels => DictVar (classrels, (unprefix "'" v, (k, length sort))))
haftmann@27422
   556
  in fold_map mk_dict typargs end
haftmann@28688
   557
and translate_eq thy algbr funcgr (thm, linear) =
haftmann@24918
   558
  let
haftmann@24918
   559
    val (args, rhs) = (apfst (snd o strip_comb) o Logic.dest_equals
haftmann@24918
   560
      o Logic.unvarify o prop_of) thm;
haftmann@24918
   561
  in
haftmann@28688
   562
    fold_map (translate_term thy algbr funcgr (SOME thm)) args
haftmann@28688
   563
    ##>> translate_term thy algbr funcgr (SOME thm) rhs
haftmann@28350
   564
    #>> rpair (thm, linear)
haftmann@24918
   565
  end
haftmann@26972
   566
and ensure_inst thy (algbr as (_, algebra)) funcgr (class, tyco) =
haftmann@24918
   567
  let
haftmann@24918
   568
    val superclasses = (Sorts.certify_sort algebra o Sorts.super_classes algebra) class;
wenzelm@24969
   569
    val classparams = these (try (#params o AxClass.get_info thy) class);
haftmann@24918
   570
    val vs = Name.names Name.context "'a" (Sorts.mg_domain algebra tyco [class]);
haftmann@24918
   571
    val sorts' = Sorts.mg_domain (Sign.classes_of thy) tyco [class];
haftmann@24918
   572
    val vs' = map2 (fn (v, sort1) => fn sort2 => (v,
haftmann@24918
   573
      Sorts.inter_sort (Sign.classes_of thy) (sort1, sort2))) vs sorts';
haftmann@24918
   574
    val arity_typ = Type (tyco, map TFree vs);
haftmann@24918
   575
    val arity_typ' = Type (tyco, map (fn (v, sort) => TVar ((v, 0), sort)) vs');
haftmann@28688
   576
    fun translate_superarity superclass =
haftmann@24918
   577
      ensure_class thy algbr funcgr superclass
haftmann@24918
   578
      ##>> ensure_classrel thy algbr funcgr (class, superclass)
haftmann@28688
   579
      ##>> translate_dicts thy algbr funcgr NONE (arity_typ, [superclass])
haftmann@24918
   580
      #>> (fn ((superclass, classrel), [DictConst (inst, dss)]) =>
haftmann@24918
   581
            (superclass, (classrel, (inst, dss))));
haftmann@28688
   582
    fun translate_classparam_inst (c, ty) =
haftmann@24918
   583
      let
haftmann@24918
   584
        val c_inst = Const (c, map_type_tfree (K arity_typ') ty);
haftmann@25597
   585
        val thm = AxClass.unoverload_conv thy (Thm.cterm_of thy c_inst);
haftmann@24918
   586
        val c_ty = (apsnd Logic.unvarifyT o dest_Const o snd
haftmann@24918
   587
          o Logic.dest_equals o Thm.prop_of) thm;
haftmann@24918
   588
      in
haftmann@24918
   589
        ensure_const thy algbr funcgr c
haftmann@28688
   590
        ##>> translate_const thy algbr funcgr (SOME thm) c_ty
haftmann@28350
   591
        #>> (fn (c, IConst c_inst) => ((c, c_inst), (thm, true)))
haftmann@24918
   592
      end;
haftmann@24918
   593
    val stmt_inst =
haftmann@24918
   594
      ensure_class thy algbr funcgr class
haftmann@24918
   595
      ##>> ensure_tyco thy algbr funcgr tyco
haftmann@28688
   596
      ##>> fold_map (translate_tyvar_sort thy algbr funcgr) vs
haftmann@28688
   597
      ##>> fold_map translate_superarity superclasses
haftmann@28688
   598
      ##>> fold_map translate_classparam_inst classparams
haftmann@24918
   599
      #>> (fn ((((class, tyco), arity), superarities), classparams) =>
haftmann@24918
   600
             Classinst ((class, (tyco, arity)), (superarities, classparams)));
haftmann@28663
   601
  in ensure_stmt lookup_instance (declare_instance thy) stmt_inst (class, tyco) end
haftmann@26972
   602
and ensure_const thy algbr funcgr c =
haftmann@24918
   603
  let
haftmann@24918
   604
    fun stmt_datatypecons tyco =
haftmann@24918
   605
      ensure_tyco thy algbr funcgr tyco
haftmann@28663
   606
      #>> (fn tyco => Datatypecons (c, tyco));
haftmann@24918
   607
    fun stmt_classparam class =
haftmann@24918
   608
      ensure_class thy algbr funcgr class
haftmann@28663
   609
      #>> (fn class => Classparam (c, class));
haftmann@28663
   610
    fun stmt_fun ((vs, raw_ty), raw_thms) =
haftmann@24918
   611
      let
haftmann@26972
   612
        val ty = Logic.unvarifyT raw_ty;
haftmann@24918
   613
        val thms = if (null o Term.typ_tfrees) ty orelse (null o fst o strip_type) ty
haftmann@24918
   614
          then raw_thms
haftmann@28423
   615
          else (map o apfst) (Code_Unit.expand_eta thy 1) raw_thms;
haftmann@24918
   616
      in
haftmann@28688
   617
        fold_map (translate_tyvar_sort thy algbr funcgr) vs
haftmann@28688
   618
        ##>> translate_typ thy algbr funcgr ty
haftmann@28688
   619
        ##>> fold_map (translate_eq thy algbr funcgr) thms
haftmann@28663
   620
        #>> (fn info => Fun (c, info))
haftmann@24918
   621
      end;
haftmann@28663
   622
    val stmt_const = case Code.get_datatype_of_constr thy c
haftmann@24918
   623
     of SOME tyco => stmt_datatypecons tyco
haftmann@24918
   624
      | NONE => (case AxClass.class_of_param thy c
haftmann@24918
   625
         of SOME class => stmt_classparam class
haftmann@28663
   626
          | NONE => stmt_fun (Code_Funcgr.typ funcgr c, Code_Funcgr.eqns funcgr c))
haftmann@28663
   627
  in ensure_stmt lookup_const (declare_const thy) stmt_const c end
haftmann@28688
   628
and translate_term thy algbr funcgr thm (Const (c, ty)) =
haftmann@28688
   629
      translate_app thy algbr funcgr thm ((c, ty), [])
haftmann@28688
   630
  | translate_term thy algbr funcgr thm (Free (v, _)) =
haftmann@24918
   631
      pair (IVar v)
haftmann@28688
   632
  | translate_term thy algbr funcgr thm (Abs (abs as (_, ty, _))) =
haftmann@24918
   633
      let
haftmann@24918
   634
        val (v, t) = Syntax.variant_abs abs;
haftmann@24918
   635
      in
haftmann@28688
   636
        translate_typ thy algbr funcgr ty
haftmann@28688
   637
        ##>> translate_term thy algbr funcgr thm t
haftmann@24918
   638
        #>> (fn (ty, t) => (v, ty) `|-> t)
haftmann@24918
   639
      end
haftmann@28688
   640
  | translate_term thy algbr funcgr thm (t as _ $ _) =
haftmann@24918
   641
      case strip_comb t
haftmann@24918
   642
       of (Const (c, ty), ts) =>
haftmann@28688
   643
            translate_app thy algbr funcgr thm ((c, ty), ts)
haftmann@24918
   644
        | (t', ts) =>
haftmann@28688
   645
            translate_term thy algbr funcgr thm t'
haftmann@28688
   646
            ##>> fold_map (translate_term thy algbr funcgr thm) ts
haftmann@24918
   647
            #>> (fn (t, ts) => t `$$ ts)
haftmann@28688
   648
and translate_const thy algbr funcgr thm (c, ty) =
haftmann@26972
   649
  let
haftmann@26972
   650
    val tys = Sign.const_typargs thy (c, ty);
haftmann@28054
   651
    val sorts = (map snd o fst o Code_Funcgr.typ funcgr) c;
haftmann@26972
   652
    val tys_args = (fst o Term.strip_type) ty;
haftmann@26972
   653
  in
haftmann@26972
   654
    ensure_const thy algbr funcgr c
haftmann@28688
   655
    ##>> fold_map (translate_dicts thy algbr funcgr thm) (tys ~~ sorts)
haftmann@28688
   656
    ##>> fold_map (translate_typ thy algbr funcgr) tys_args
haftmann@26972
   657
    #>> (fn ((c, iss), tys) => IConst (c, (iss, tys)))
haftmann@26972
   658
  end
haftmann@28688
   659
and translate_app_default thy algbr funcgr thm (c_ty, ts) =
haftmann@28688
   660
  translate_const thy algbr funcgr thm c_ty
haftmann@28688
   661
  ##>> fold_map (translate_term thy algbr funcgr thm) ts
haftmann@24918
   662
  #>> (fn (t, ts) => t `$$ ts)
haftmann@28688
   663
and translate_case thy algbr funcgr thm n cases (app as ((c, ty), ts)) =
haftmann@24918
   664
  let
haftmann@24918
   665
    val (tys, _) =
haftmann@24918
   666
      (chop (1 + (if null cases then 1 else length cases)) o fst o strip_type) ty;
haftmann@24918
   667
    val dt = nth ts n;
haftmann@24918
   668
    val dty = nth tys n;
haftmann@24918
   669
    fun is_undefined (Const (c, _)) = Code.is_undefined thy c
haftmann@24918
   670
      | is_undefined _ = false;
haftmann@24918
   671
    fun mk_case (co, n) t =
haftmann@24918
   672
      let
haftmann@24918
   673
        val (vs, body) = Term.strip_abs_eta n t;
haftmann@24918
   674
        val selector = list_comb (Const (co, map snd vs ---> dty), map Free vs);
haftmann@24918
   675
      in if is_undefined body then NONE else SOME (selector, body) end;
haftmann@24918
   676
    fun mk_ds [] =
haftmann@24918
   677
          let
haftmann@24918
   678
            val ([v_ty], body) = Term.strip_abs_eta 1 (the_single (nth_drop n ts))
haftmann@24918
   679
          in [(Free v_ty, body)] end
haftmann@24918
   680
      | mk_ds cases = map_filter (uncurry mk_case)
haftmann@28054
   681
          (AList.make (Code_Unit.no_args thy) cases ~~ nth_drop n ts);
haftmann@24918
   682
  in
haftmann@28688
   683
    translate_term thy algbr funcgr thm dt
haftmann@28688
   684
    ##>> translate_typ thy algbr funcgr dty
haftmann@28688
   685
    ##>> fold_map (fn (pat, body) => translate_term thy algbr funcgr thm pat
haftmann@28688
   686
          ##>> translate_term thy algbr funcgr thm body) (mk_ds cases)
haftmann@28688
   687
    ##>> translate_app_default thy algbr funcgr thm app
haftmann@24918
   688
    #>> (fn (((dt, dty), ds), t0) => ICase (((dt, dty), ds), t0))
haftmann@24918
   689
  end
haftmann@28688
   690
and translate_app thy algbr funcgr thm ((c, ty), ts) = case Code.get_case_data thy c
haftmann@24918
   691
 of SOME (n, cases) => let val i = 1 + (if null cases then 1 else length cases) in
haftmann@24918
   692
      if length ts < i then
haftmann@24918
   693
        let
haftmann@24918
   694
          val k = length ts;
haftmann@24918
   695
          val tys = (curry Library.take (i - k) o curry Library.drop k o fst o strip_type) ty;
haftmann@24918
   696
          val ctxt = (fold o fold_aterms)
haftmann@24918
   697
            (fn Free (v, _) => Name.declare v | _ => I) ts Name.context;
haftmann@24918
   698
          val vs = Name.names ctxt "a" tys;
haftmann@24918
   699
        in
haftmann@28688
   700
          fold_map (translate_typ thy algbr funcgr) tys
haftmann@28688
   701
          ##>> translate_case thy algbr funcgr thm n cases ((c, ty), ts @ map Free vs)
haftmann@24918
   702
          #>> (fn (tys, t) => map2 (fn (v, _) => pair v) vs tys `|--> t)
haftmann@24918
   703
        end
haftmann@24918
   704
      else if length ts > i then
haftmann@28688
   705
        translate_case thy algbr funcgr thm n cases ((c, ty), Library.take (i, ts))
haftmann@28688
   706
        ##>> fold_map (translate_term thy algbr funcgr thm) (Library.drop (i, ts))
haftmann@24918
   707
        #>> (fn (t, ts) => t `$$ ts)
haftmann@24918
   708
      else
haftmann@28688
   709
        translate_case thy algbr funcgr thm n cases ((c, ty), ts)
haftmann@24918
   710
      end
haftmann@28688
   711
  | NONE => translate_app_default thy algbr funcgr thm ((c, ty), ts);
haftmann@24918
   712
haftmann@25969
   713
haftmann@27103
   714
(** generated programs **)
haftmann@27103
   715
haftmann@27103
   716
(* store *)
haftmann@27103
   717
haftmann@27103
   718
structure Program = CodeDataFun
haftmann@27103
   719
(
haftmann@28663
   720
  type T = naming * program;
haftmann@28663
   721
  val empty = (empty_naming, Graph.empty);
haftmann@28663
   722
  fun purge thy cs (naming, program) = empty (*FIXME: problem: un-declaration of names
haftmann@27609
   723
    let
haftmann@27609
   724
      val cs_exisiting =
haftmann@28054
   725
        map_filter (Code_Name.const_rev thy) (Graph.keys program);
haftmann@27609
   726
      val dels = (Graph.all_preds program
haftmann@28054
   727
          o map (Code_Name.const thy)
haftmann@27609
   728
          o filter (member (op =) cs_exisiting)
haftmann@27609
   729
        ) cs;
haftmann@28663
   730
    in Graph.del_nodes dels program end;*)
haftmann@27103
   731
);
haftmann@27103
   732
haftmann@27103
   733
val cached_program = Program.get;
haftmann@25969
   734
haftmann@28663
   735
fun generate thy funcgr f name =
haftmann@28663
   736
  Program.change_yield thy (fn naming_program => (NONE, naming_program)
haftmann@28663
   737
    |> f thy (Code.operational_algebra thy) funcgr name
haftmann@28663
   738
    |-> (fn name => fn (_, naming_program) => (name, naming_program)));
haftmann@27103
   739
haftmann@27103
   740
haftmann@27103
   741
(* program generation *)
haftmann@27103
   742
haftmann@27103
   743
fun consts_program thy cs =
haftmann@27103
   744
  let
haftmann@28663
   745
    fun project_consts cs (naming, program) =
haftmann@27103
   746
      let
haftmann@27103
   747
        val cs_all = Graph.all_succs program cs;
haftmann@28663
   748
      in (cs, (naming, Graph.subgraph (member (op =) cs_all) program)) end;
haftmann@27103
   749
    fun generate_consts thy algebra funcgr =
haftmann@27103
   750
      fold_map (ensure_const thy algebra funcgr);
haftmann@27103
   751
  in
haftmann@28054
   752
    generate thy (Code_Funcgr.make thy cs) generate_consts cs
haftmann@27103
   753
    |-> project_consts
haftmann@27103
   754
  end;
haftmann@27103
   755
haftmann@27103
   756
haftmann@27103
   757
(* value evaluation *)
haftmann@25969
   758
haftmann@24918
   759
fun ensure_value thy algbr funcgr t = 
haftmann@24918
   760
  let
haftmann@24918
   761
    val ty = fastype_of t;
haftmann@24918
   762
    val vs = fold_term_types (K (fold_atyps (insert (eq_fst op =)
haftmann@24918
   763
      o dest_TFree))) t [];
haftmann@24918
   764
    val stmt_value =
haftmann@28688
   765
      fold_map (translate_tyvar_sort thy algbr funcgr) vs
haftmann@28688
   766
      ##>> translate_typ thy algbr funcgr ty
haftmann@28688
   767
      ##>> translate_term thy algbr funcgr NONE t
haftmann@28663
   768
      #>> (fn ((vs, ty), t) => Fun
haftmann@28663
   769
        (Term.dummy_patternN, ((vs, ty), [(([], t), (Drule.dummy_thm, true))])));
haftmann@28663
   770
    fun term_value (dep, (naming, program1)) =
haftmann@25969
   771
      let
haftmann@28663
   772
        val Fun (_, ((vs, ty), [(([], t), _)])) =
haftmann@28663
   773
          Graph.get_node program1 Term.dummy_patternN;
haftmann@28663
   774
        val deps = Graph.imm_succs program1 Term.dummy_patternN;
haftmann@28663
   775
        val program2 = Graph.del_nodes [Term.dummy_patternN] program1;
haftmann@27103
   776
        val deps_all = Graph.all_succs program2 deps;
haftmann@27103
   777
        val program3 = Graph.subgraph (member (op =) deps_all) program2;
haftmann@28663
   778
      in (((naming, program3), (((vs, ty), t), deps)), (dep, (naming, program2))) end;
haftmann@26011
   779
  in
haftmann@28663
   780
    ensure_stmt ((K o K) NONE) pair stmt_value Term.dummy_patternN
haftmann@26011
   781
    #> snd
haftmann@26011
   782
    #> term_value
haftmann@26011
   783
  end;
haftmann@24219
   784
haftmann@27103
   785
fun eval eval_kind thy evaluator =
haftmann@27103
   786
  let
haftmann@27103
   787
    fun evaluator'' evaluator''' funcgr t =
haftmann@27103
   788
      let
haftmann@28663
   789
        val (((naming, program), (vs_ty_t, deps)), _) = generate thy funcgr ensure_value t;
haftmann@28663
   790
      in evaluator''' naming program vs_ty_t deps end;
haftmann@27103
   791
    fun evaluator' t =
haftmann@27103
   792
      let
haftmann@27103
   793
        val (t', evaluator''') = evaluator t;
haftmann@27103
   794
      in (t', evaluator'' evaluator''') end;
haftmann@27103
   795
  in eval_kind thy evaluator' end
haftmann@27103
   796
haftmann@28054
   797
fun eval_conv thy = eval Code_Funcgr.eval_conv thy;
haftmann@28054
   798
fun eval_term thy = eval Code_Funcgr.eval_term thy;
haftmann@27103
   799
haftmann@24219
   800
end; (*struct*)
haftmann@24219
   801
haftmann@24219
   802
haftmann@28054
   803
structure Basic_Code_Thingol: BASIC_CODE_THINGOL = Code_Thingol;