src/HOL/thy_syntax.ML
author berghofe
Wed, 21 Oct 1998 17:46:00 +0200
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child 6035 c041fc54ab4c
permissions -rw-r--r--
Changed syntax of rep_datatype and inductive: Theorems are no longer specified by a string of ML type "thm list" but by a comma-separated list of identifiers, which are looked up in the theory.
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(*  Title:      HOL/thy_syntax.ML
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    ID:         $Id$
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    Author:     Markus Wenzel and Lawrence C Paulson and Carsten Clasohm
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Additional theory file sections for HOL.
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*)
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85898be702b2 use ThySyn.add_syntax;
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local
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open ThyParse;
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(** typedef **)
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fun mk_typedef_decl (((((opt_name, vs), t), mx), rhs), wt) =
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  let
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    val name' = if_none opt_name t;
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    val name = strip_quotes name';
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  in
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    (cat_lines [name', mk_triple (t, mk_list vs, mx), rhs, wt],
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      [name ^ "_def", "Rep_" ^ name, "Rep_" ^ name ^ "_inverse",
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        "Abs_" ^ name ^ "_inverse"])
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  end;
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val typedef_decl =
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  optional ("(" $$-- name --$$ ")" >> Some) None --
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  type_args -- name -- opt_infix --$$ "=" -- string -- opt_witness
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  >> mk_typedef_decl;
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(** record **)
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val record_decl =
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  (type_args -- name >> (mk_pair o apfst mk_list)) --$$ "="
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    -- optional (typ --$$ "+" >> (parens o cat "Some")) "None"
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    -- repeat1 ((name --$$ "::" -- typ) >> mk_pair)
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  >> (fn ((x, y), zs) => cat_lines [x, y, mk_big_list zs]);
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(** (co)inductive **)
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fun inductive_decl coind =
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  let
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    fun mk_intr_name (s, _) =   (*the "op" cancels any infix status*)
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      if Syntax.is_identifier s then "op " ^ s else "_";
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    fun mk_params (((recs, ipairs), monos), con_defs) =
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      let val big_rec_name = space_implode "_" (map (scan_to_id o trim) recs)
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          and srec_tms = mk_list recs
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          and sintrs   = mk_big_list (map snd ipairs)
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      in
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        ";\n\n\
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        \local\n\
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        \val (thy, {defs, mono, unfold, intrs, elims, mk_cases, induct, ...}) =\n\
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        \  InductivePackage.add_inductive true " ^
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        (if coind then "true " else "false ") ^ srec_tms ^ " " ^
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         sintrs ^ " " ^ mk_list monos ^ " " ^ mk_list con_defs ^ " thy;\n\
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        \in\n\
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        \structure " ^ big_rec_name ^ " =\n\
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        \struct\n\
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        \  val defs = defs;\n\
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        \  val mono = mono;\n\
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        \  val unfold = unfold;\n\
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        \  val intrs = intrs;\n\
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        \  val elims = elims;\n\
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        \  val elim = hd elims;\n\
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        \  val " ^ (if coind then "co" else "") ^ "induct = induct;\n\
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        \  val mk_cases = mk_cases;\n\
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        \  val " ^ mk_list (map mk_intr_name ipairs) ^ " = intrs;\n\
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        \end;\n\
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        \val thy = thy;\nend;\n\
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        \val thy = thy\n"
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      end
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    val ipairs = "intrs" $$-- repeat1 (ident -- !! string)
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    fun optlist s = optional (s $$-- list1 name) []
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  in
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    repeat1 name -- ipairs -- optlist "monos" -- optlist "con_defs"
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      >> mk_params
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  end;
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(** datatype **)
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local
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  (*** generate string for calling add_datatype ***)
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  (*** and bindig theorems to ML identifiers    ***)
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  fun mk_bind_thms_string names =
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   (case find_first (not o Syntax.is_identifier) names of
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      Some id => (warning (id ^ " is not a valid identifier"); "")
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    | None =>
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        let
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          fun mk_dt_struct (s, (id, i)) =
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            s ^ "structure " ^ id ^ " =\n\
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            \struct\n\
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            \  val distinct = nth_elem (" ^ i ^ ", distinct);\n\
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            \  val inject = nth_elem (" ^ i ^ ", inject);\n\
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            \  val exhaust = nth_elem (" ^ i ^ ", exhaustion);\n\
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            \  val cases = nth_elem (" ^ i ^ ", case_thms);\n\
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            \  val (split, split_asm) = nth_elem (" ^ i ^ ", split_thms);\n" ^
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              (if length names = 1 then
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                 "  val induct = induction;\n\
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                 \  val recs = rec_thms;\n\
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                 \  val simps = simps;\n\
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                 \  val size = size;\n"
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               else "") ^
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            "end;\n";
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          val structs = foldl mk_dt_struct
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            ("", (names ~~ (map string_of_int (0 upto length names - 1))));
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        in
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          (if length names > 1 then
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             "structure " ^ (space_implode "_" names) ^ " =\n\
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             \struct\n\
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             \  val induct = induction;\n\
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             \  val recs = rec_thms;\n\
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             \  val simps = simps;\n\
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             \  val size = size;\nend;\n"
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           else "") ^ structs
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        end);
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  fun mk_dt_string dts =
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    let
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      val names = map (fn ((((alt_name, _), name), _), _) =>
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        strip_quotes (if_none alt_name name)) dts;
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      val add_datatype_args = brackets (commas (map quote names)) ^ " " ^
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        brackets (commas (map (fn ((((_, vs), name), mx), cs) =>
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          parens (brackets (commas vs) ^ ", " ^ name ^ ", " ^ mx ^ ", " ^
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            brackets (commas cs))) dts));
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    in
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      ";\nlocal\n\
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      \val (thy, {distinct, inject, exhaustion, rec_thms,\n\
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      \  case_thms, split_thms, induction, size, simps}) =\n\
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      \  DatatypePackage.add_datatype false " ^ add_datatype_args ^ " thy;\n\
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      \in\n" ^ mk_bind_thms_string names ^
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      "val thy = thy;\nend;\nval thy = thy\n"
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    end;
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  fun mk_rep_dt_string (((names, distinct), inject), induct) =
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    ";\nlocal\n\
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    \val (thy, {distinct, inject, exhaustion, rec_thms,\n\
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    \  case_thms, split_thms, induction, size, simps}) =\n\
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    \  DatatypePackage.rep_datatype " ^
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    (case names of
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        Some names => "(Some [" ^ commas_quote names ^ "]) " ^
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          mk_list (map mk_list distinct) ^ " " ^ mk_list (map mk_list inject) ^
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            " " ^ induct ^ " thy;\nin\n" ^ mk_bind_thms_string names
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      | None => "None " ^ mk_list (map mk_list distinct) ^ " " ^
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          mk_list (map mk_list inject) ^ " " ^ induct ^ " thy;\nin\n") ^
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    "val thy = thy;\nend;\nval thy = thy\n";
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  (*** parsers ***)
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  val simple_typ = ident || (type_var >> strip_quotes);
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  fun complex_typ toks =
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    let val typ = simple_typ || "(" $$-- complex_typ --$$ ")";
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        val typ2 = complex_typ || "(" $$-- complex_typ --$$ ")";
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    in
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     (typ ^^ (repeat ident >> (cat "" o space_implode " ")) ||
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      "(" $$-- !! (list1 typ2 >> (parens o commas)) --$$ ")" ^^ !!
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        (repeat1 ident >> (cat "" o space_implode " "))) toks
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    end;
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  val opt_typs = repeat ((string >> strip_quotes) ||
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    simple_typ || ("(" $$-- complex_typ --$$ ")"));
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  val constructor = name -- opt_typs -- opt_mixfix >> (fn ((n, Ts), mx) =>
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    parens (n ^ ", " ^ brackets (commas_quote Ts) ^ ", " ^ mx));
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  val opt_name = optional ("(" $$-- name --$$ ")" >> Some) None
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  fun optlistlist s = optional (s $$-- enum "and" (list name)) [[]]
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in
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  val datatype_decl =
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    enum1 "and" (opt_name -- type_args -- name -- opt_infix --$$ "=" --
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      enum1 "|" constructor) >> mk_dt_string;
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  val rep_datatype_decl =
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    ((optional ((repeat1 (name >> strip_quotes)) >> Some) None) --
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      optlistlist "distinct" -- optlistlist "inject" --
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        ("induct" $$-- name)) >> mk_rep_dt_string;
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end;
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(** primrec **)
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fun mk_primrec_decl (alt_name, eqns) =
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  let
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    val names = map (fn (s, _) => if s = "" then "_" else s) eqns
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  in
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    ";\nval (thy, " ^ mk_list names ^
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    ") = PrimrecPackage.add_primrec " ^ alt_name ^ " " ^
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      mk_list (map mk_pair (map (apfst quote) eqns)) ^ " " ^ " thy;\n\
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    \val thy = thy\n"
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  end;
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(* either names and axioms or just axioms *)
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val primrec_decl = (optional ("(" $$-- name --$$ ")") "\"\"" --
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  (repeat1 ((ident -- string) || (string >> pair "")))) >> mk_primrec_decl;
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(** rec: interface to Slind's TFL **)
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(*fname: name of function being defined; rel: well-founded relation*)
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fun mk_rec_decl ((((fname, rel), congs), ss), axms) =
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  let val fid = trim fname
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      val intrnl_name = fid ^ "_Intrnl"
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  in
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	 (";\n\n\
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          \val _ = writeln \"Recursive function " ^ fid ^ "\"\n\
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          \val (thy, pats_" ^ intrnl_name ^ ") = Tfl.define thy " ^ 
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	                 quote fid ^ " " ^ 
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	                 rel ^ "\n" ^ mk_big_list axms ^ ";\n\
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          \val thy = thy"
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         ,
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          "structure " ^ fid ^ " =\n\
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          \  struct\n\
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          \  val _ = writeln \"Proofs for recursive function " ^ fid ^ "\"\n\
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          \  val {rules, induct, tcs} = \n\
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          \    \t Tfl.simplify_defn (" ^ ss ^ ", " ^ congs ^ ")\n\
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          \    \t\t  (thy, (" ^ quote fid ^ ", pats_" ^ intrnl_name ^ "))\n\
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          \  end;\n\
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          \val pats_" ^ intrnl_name ^ " = ();\n")
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  end;
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val rec_decl = (name -- string -- 
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		optional ("congs" $$-- string >> trim) "[]" -- 
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		optional ("simpset" $$-- string >> trim) "simpset()" -- 
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		repeat1 string >> mk_rec_decl) ;
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(** augment thy syntax **)
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in
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val _ = ThySyn.add_syntax
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 ["intrs", "monos", "con_defs", "congs", "simpset", "|",
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  "and", "distinct", "inject", "induct"]
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 [axm_section "typedef" "|> TypedefPackage.add_typedef" typedef_decl,
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  section "record" "|> RecordPackage.add_record" record_decl,
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  section "inductive" "" (inductive_decl false),
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  section "coinductive" "" (inductive_decl true),
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  section "datatype" "" datatype_decl,
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  section "rep_datatype" "" rep_datatype_decl,
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  section "primrec" "" primrec_decl,
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  ("recdef", rec_decl)];
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end;