src/Tools/code/code_target.ML
author haftmann
Wed Oct 22 14:15:45 2008 +0200 (2008-10-22)
changeset 28663 bd8438543bf2
parent 28090 29af3c712d2b
child 28690 fc51fa5efea1
permissions -rw-r--r--
code identifier namings are no longer imperative
     1 (*  Title:      Tools/code/code_target.ML
     2     ID:         $Id$
     3     Author:     Florian Haftmann, TU Muenchen
     4 
     5 Serializer from intermediate language ("Thin-gol") to target languages.
     6 *)
     7 
     8 signature CODE_TARGET =
     9 sig
    10   include CODE_PRINTER
    11 
    12   type serializer
    13   val add_target: string * (serializer * literals) -> theory -> theory
    14   val extend_target: string *
    15       (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    16     -> theory -> theory
    17   val assert_target: theory -> string -> string
    18 
    19   type destination
    20   type serialization
    21   val parse_args: (OuterLex.token list -> 'a * OuterLex.token list)
    22     -> OuterLex.token list -> 'a
    23   val stmt_names_of_destination: destination -> string list
    24   val code_of_pretty: Pretty.T -> string
    25   val code_writeln: Pretty.T -> unit
    26   val mk_serialization: string -> ('a -> unit) option
    27     -> (Path.T option -> 'a -> unit)
    28     -> ('a -> string * string option list)
    29     -> 'a -> serialization
    30   val serialize: theory -> string -> string option -> Args.T list
    31     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> serialization
    32   val serialize_custom: theory -> string * (serializer * literals)
    33     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> string * string option list
    34   val the_literals: theory -> string -> literals
    35   val compile: serialization -> unit
    36   val export: serialization -> unit
    37   val file: Path.T -> serialization -> unit
    38   val string: string list -> serialization -> string
    39   val code_of: theory -> string -> string -> string list -> string list -> string
    40   val code_width: int ref
    41 
    42   val allow_abort: string -> theory -> theory
    43   val add_syntax_class: string -> class
    44     -> (string * (string * string) list) option -> theory -> theory
    45   val add_syntax_inst: string -> string * class -> bool -> theory -> theory
    46   val add_syntax_tyco: string -> string -> tyco_syntax option -> theory -> theory
    47   val add_syntax_const: string -> string -> const_syntax option -> theory -> theory
    48   val add_reserved: string -> string -> theory -> theory
    49 end;
    50 
    51 structure Code_Target : CODE_TARGET =
    52 struct
    53 
    54 open Basic_Code_Thingol;
    55 open Code_Printer;
    56 
    57 (** basics **)
    58 
    59 datatype destination = Compile | Export | File of Path.T | String of string list;
    60 type serialization = destination -> (string * string option list) option;
    61 
    62 val code_width = ref 80; (*FIXME after Pretty module no longer depends on print mode*)
    63 fun code_setmp f = PrintMode.setmp [] (Pretty.setmp_margin (!code_width) f);
    64 fun code_of_pretty p = code_setmp Pretty.string_of p ^ "\n";
    65 fun code_writeln p = Pretty.setmp_margin (!code_width) Pretty.writeln p;
    66 
    67 (*FIXME why another code_setmp?*)
    68 fun compile f = (code_setmp f Compile; ());
    69 fun export f = (code_setmp f Export; ());
    70 fun file p f = (code_setmp f (File p); ());
    71 fun string cs f = fst (the (code_setmp f (String cs)));
    72 
    73 fun stmt_names_of_destination (String stmts) = stmts
    74   | stmt_names_of_destination _ = [];
    75 
    76 fun mk_serialization target (SOME comp) _ _ code Compile = (comp code; NONE)
    77   | mk_serialization target NONE _ _ _ Compile = error (target ^ ": no internal compilation")
    78   | mk_serialization target _ output _ code Export = (output NONE code ; NONE)
    79   | mk_serialization target _ output _ code (File file) = (output (SOME file) code; NONE)
    80   | mk_serialization target _ _ string code (String _) = SOME (string code);
    81 
    82 
    83 (** theory data **)
    84 
    85 structure StringPairTab = Code_Name.StringPairTab;
    86 
    87 datatype name_syntax_table = NameSyntaxTable of {
    88   class: class_syntax Symtab.table,
    89   instance: unit StringPairTab.table,
    90   tyco: tyco_syntax Symtab.table,
    91   const: const_syntax Symtab.table
    92 };
    93 
    94 fun mk_name_syntax_table ((class, instance), (tyco, const)) =
    95   NameSyntaxTable { class = class, instance = instance, tyco = tyco, const = const };
    96 fun map_name_syntax_table f (NameSyntaxTable { class, instance, tyco, const }) =
    97   mk_name_syntax_table (f ((class, instance), (tyco, const)));
    98 fun merge_name_syntax_table (NameSyntaxTable { class = class1, instance = instance1, tyco = tyco1, const = const1 },
    99     NameSyntaxTable { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
   100   mk_name_syntax_table (
   101     (Symtab.join (K snd) (class1, class2),
   102        StringPairTab.join (K snd) (instance1, instance2)),
   103     (Symtab.join (K snd) (tyco1, tyco2),
   104        Symtab.join (K snd) (const1, const2))
   105   );
   106 
   107 type serializer =
   108   string option                         (*module name*)
   109   -> Args.T list                        (*arguments*)
   110   -> (string -> string)                 (*labelled_name*)
   111   -> string list                        (*reserved symbols*)
   112   -> (string * Pretty.T) list           (*includes*)
   113   -> (string -> string option)          (*module aliasses*)
   114   -> (string -> class_syntax option)
   115   -> (string -> tyco_syntax option)
   116   -> (string -> const_syntax option)
   117   -> Code_Thingol.naming
   118   -> Code_Thingol.program
   119   -> string list                        (*selected statements*)
   120   -> serialization;
   121 
   122 datatype serializer_entry = Serializer of serializer * literals
   123   | Extends of string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   124 
   125 datatype target = Target of {
   126   serial: serial,
   127   serializer: serializer_entry,
   128   reserved: string list,
   129   includes: Pretty.T Symtab.table,
   130   name_syntax_table: name_syntax_table,
   131   module_alias: string Symtab.table
   132 };
   133 
   134 fun mk_target ((serial, serializer), ((reserved, includes), (name_syntax_table, module_alias))) =
   135   Target { serial = serial, serializer = serializer, reserved = reserved, 
   136     includes = includes, name_syntax_table = name_syntax_table, module_alias = module_alias };
   137 fun map_target f ( Target { serial, serializer, reserved, includes, name_syntax_table, module_alias } ) =
   138   mk_target (f ((serial, serializer), ((reserved, includes), (name_syntax_table, module_alias))));
   139 fun merge_target strict target (Target { serial = serial1, serializer = serializer,
   140   reserved = reserved1, includes = includes1,
   141   name_syntax_table = name_syntax_table1, module_alias = module_alias1 },
   142     Target { serial = serial2, serializer = _,
   143       reserved = reserved2, includes = includes2,
   144       name_syntax_table = name_syntax_table2, module_alias = module_alias2 }) =
   145   if serial1 = serial2 orelse not strict then
   146     mk_target ((serial1, serializer),
   147       ((merge (op =) (reserved1, reserved2), Symtab.merge (op =) (includes1, includes2)),
   148         (merge_name_syntax_table (name_syntax_table1, name_syntax_table2),
   149           Symtab.join (K snd) (module_alias1, module_alias2))
   150     ))
   151   else
   152     error ("Incompatible serializers: " ^ quote target);
   153 
   154 structure CodeTargetData = TheoryDataFun
   155 (
   156   type T = target Symtab.table * string list;
   157   val empty = (Symtab.empty, []);
   158   val copy = I;
   159   val extend = I;
   160   fun merge _ ((target1, exc1) : T, (target2, exc2)) =
   161     (Symtab.join (merge_target true) (target1, target2), Library.merge (op =) (exc1, exc2));
   162 );
   163 
   164 fun the_serializer (Target { serializer, ... }) = serializer;
   165 fun the_reserved (Target { reserved, ... }) = reserved;
   166 fun the_includes (Target { includes, ... }) = includes;
   167 fun the_name_syntax (Target { name_syntax_table = NameSyntaxTable x, ... }) = x;
   168 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   169 
   170 val abort_allowed = snd o CodeTargetData.get;
   171 
   172 fun assert_target thy target =
   173   case Symtab.lookup (fst (CodeTargetData.get thy)) target
   174    of SOME data => target
   175     | NONE => error ("Unknown code target language: " ^ quote target);
   176 
   177 fun put_target (target, seri) thy =
   178   let
   179     val lookup_target = Symtab.lookup (fst (CodeTargetData.get thy));
   180     val _ = case seri
   181      of Extends (super, _) => if is_some (lookup_target super) then ()
   182           else error ("Unknown code target language: " ^ quote super)
   183       | _ => ();
   184     val overwriting = case (Option.map the_serializer o lookup_target) target
   185      of NONE => false
   186       | SOME (Extends _) => true
   187       | SOME (Serializer _) => (case seri
   188          of Extends _ => error ("Will not overwrite existing target " ^ quote target)
   189           | _ => true);
   190     val _ = if overwriting
   191       then warning ("Overwriting existing target " ^ quote target)
   192       else (); 
   193   in
   194     thy
   195     |> (CodeTargetData.map o apfst oo Symtab.map_default)
   196           (target, mk_target ((serial (), seri), (([], Symtab.empty),
   197             (mk_name_syntax_table ((Symtab.empty, StringPairTab.empty), (Symtab.empty, Symtab.empty)),
   198               Symtab.empty))))
   199           ((map_target o apfst o apsnd o K) seri)
   200   end;
   201 
   202 fun add_target (target, seri) = put_target (target, Serializer seri);
   203 fun extend_target (target, (super, modify)) =
   204   put_target (target, Extends (super, modify));
   205 
   206 fun map_target_data target f thy =
   207   let
   208     val _ = assert_target thy target;
   209   in
   210     thy
   211     |> (CodeTargetData.map o apfst o Symtab.map_entry target o map_target) f
   212   end;
   213 
   214 fun map_reserved target =
   215   map_target_data target o apsnd o apfst o apfst;
   216 fun map_includes target =
   217   map_target_data target o apsnd o apfst o apsnd;
   218 fun map_name_syntax target =
   219   map_target_data target o apsnd o apsnd o apfst o map_name_syntax_table;
   220 fun map_module_alias target =
   221   map_target_data target o apsnd o apsnd o apsnd;
   222 
   223 
   224 (** serializer configuration **)
   225 
   226 (* data access *)
   227 
   228 local
   229 
   230 fun cert_class thy class =
   231   let
   232     val _ = AxClass.get_info thy class;
   233   in class end;
   234 
   235 fun read_class thy = cert_class thy o Sign.intern_class thy;
   236 
   237 fun cert_tyco thy tyco =
   238   let
   239     val _ = if Sign.declared_tyname thy tyco then ()
   240       else error ("No such type constructor: " ^ quote tyco);
   241   in tyco end;
   242 
   243 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   244 
   245 fun gen_add_syntax_class prep_class prep_const target raw_class raw_syn thy =
   246   let
   247     val class = prep_class thy raw_class;
   248     fun mk_classparam c = case AxClass.class_of_param thy c
   249      of SOME class' => if class = class' then c
   250           else error ("Not a class operation for class " ^ quote class ^ ": " ^ quote c)
   251       | NONE => error ("Not a class operation: " ^ quote c);
   252     fun mk_syntax_params raw_params = AList.lookup (op =)
   253       ((map o apfst) (mk_classparam o prep_const thy) raw_params);
   254   in case raw_syn
   255    of SOME (syntax, raw_params) =>
   256       thy
   257       |> (map_name_syntax target o apfst o apfst)
   258            (Symtab.update (class, (syntax, mk_syntax_params raw_params)))
   259     | NONE =>
   260       thy
   261       |> (map_name_syntax target o apfst o apfst)
   262            (Symtab.delete_safe class)
   263   end;
   264 
   265 fun gen_add_syntax_inst prep_class prep_tyco target (raw_tyco, raw_class) add_del thy =
   266   let
   267     val inst = (prep_class thy raw_class, prep_tyco thy raw_tyco);
   268   in if add_del then
   269     thy
   270     |> (map_name_syntax target o apfst o apsnd)
   271         (StringPairTab.update (inst, ()))
   272   else
   273     thy
   274     |> (map_name_syntax target o apfst o apsnd)
   275         (StringPairTab.delete_safe inst)
   276   end;
   277 
   278 fun gen_add_syntax_tyco prep_tyco target raw_tyco raw_syn thy =
   279   let
   280     val tyco = prep_tyco thy raw_tyco;
   281     fun check_args (syntax as (n, _)) = if n <> Sign.arity_number thy tyco
   282       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   283       else syntax
   284   in case raw_syn
   285    of SOME syntax =>
   286       thy
   287       |> (map_name_syntax target o apsnd o apfst)
   288            (Symtab.update (tyco, check_args syntax))
   289    | NONE =>
   290       thy
   291       |> (map_name_syntax target o apsnd o apfst)
   292            (Symtab.delete_safe tyco)
   293   end;
   294 
   295 fun gen_add_syntax_const prep_const target raw_c raw_syn thy =
   296   let
   297     val c = prep_const thy raw_c;
   298     fun check_args (syntax as (n, _)) = if n > Code_Unit.no_args thy c
   299       then error ("Too many arguments in syntax for constant " ^ quote c)
   300       else syntax;
   301   in case raw_syn
   302    of SOME syntax =>
   303       thy
   304       |> (map_name_syntax target o apsnd o apsnd)
   305            (Symtab.update (c, check_args syntax))
   306    | NONE =>
   307       thy
   308       |> (map_name_syntax target o apsnd o apsnd)
   309            (Symtab.delete_safe c)
   310   end;
   311 
   312 fun add_reserved target =
   313   let
   314     fun add sym syms = if member (op =) syms sym
   315       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   316       else insert (op =) sym syms
   317   in map_reserved target o add end;
   318 
   319 fun add_include target =
   320   let
   321     fun add (name, SOME content) incls =
   322           let
   323             val _ = if Symtab.defined incls name
   324               then warning ("Overwriting existing include " ^ name)
   325               else ();
   326           in Symtab.update (name, str content) incls end
   327       | add (name, NONE) incls =
   328           Symtab.delete name incls;
   329   in map_includes target o add end;
   330 
   331 fun add_module_alias target =
   332   map_module_alias target o Symtab.update o apsnd Code_Name.check_modulename;
   333 
   334 fun gen_allow_abort prep_const raw_c thy =
   335   let
   336     val c = prep_const thy raw_c;
   337   in thy |> (CodeTargetData.map o apsnd) (insert (op =) c) end;
   338 
   339 fun zip_list (x::xs) f g =
   340   f
   341   #-> (fn y =>
   342     fold_map (fn x => g |-- f >> pair x) xs
   343     #-> (fn xys => pair ((x, y) :: xys)));
   344 
   345 
   346 (* concrete syntax *)
   347 
   348 structure P = OuterParse
   349 and K = OuterKeyword
   350 
   351 fun parse_multi_syntax parse_thing parse_syntax =
   352   P.and_list1 parse_thing
   353   #-> (fn things => Scan.repeat1 (P.$$$ "(" |-- P.name --
   354         (zip_list things parse_syntax (P.$$$ "and")) --| P.$$$ ")"));
   355 
   356 in
   357 
   358 val add_syntax_class = gen_add_syntax_class cert_class (K I);
   359 val add_syntax_inst = gen_add_syntax_inst cert_class cert_tyco;
   360 val add_syntax_tyco = gen_add_syntax_tyco cert_tyco;
   361 val add_syntax_const = gen_add_syntax_const (K I);
   362 val allow_abort = gen_allow_abort (K I);
   363 val add_reserved = add_reserved;
   364 
   365 val add_syntax_class_cmd = gen_add_syntax_class read_class Code_Unit.read_const;
   366 val add_syntax_inst_cmd = gen_add_syntax_inst read_class read_tyco;
   367 val add_syntax_tyco_cmd = gen_add_syntax_tyco read_tyco;
   368 val add_syntax_const_cmd = gen_add_syntax_const Code_Unit.read_const;
   369 val allow_abort_cmd = gen_allow_abort Code_Unit.read_const;
   370 
   371 fun the_literals thy =
   372   let
   373     val (targets, _) = CodeTargetData.get thy;
   374     fun literals target = case Symtab.lookup targets target
   375      of SOME data => (case the_serializer data
   376          of Serializer (_, literals) => literals
   377           | Extends (super, _) => literals super)
   378       | NONE => error ("Unknown code target language: " ^ quote target);
   379   in literals end;
   380 
   381 
   382 (** serializer usage **)
   383 
   384 (* montage *)
   385 
   386 local
   387 
   388 fun labelled_name thy program name = case Graph.get_node program name
   389  of Code_Thingol.Fun (c, _) => quote (Code_Unit.string_of_const thy c)
   390   | Code_Thingol.Datatype (tyco, _) => "type " ^ quote (Sign.extern_type thy tyco)
   391   | Code_Thingol.Datatypecons (c, _) => quote (Code_Unit.string_of_const thy c)
   392   | Code_Thingol.Class (class, _) => "class " ^ quote (Sign.extern_class thy class)
   393   | Code_Thingol.Classrel (sub, super) => let
   394         val Code_Thingol.Class (sub, _) = Graph.get_node program sub
   395         val Code_Thingol.Class (super, _) = Graph.get_node program super
   396       in quote (Sign.extern_class thy sub ^ " < " ^ Sign.extern_class thy super) end
   397   | Code_Thingol.Classparam (c, _) => quote (Code_Unit.string_of_const thy c)
   398   | Code_Thingol.Classinst ((class, (tyco, _)), _) => let
   399         val Code_Thingol.Class (class, _) = Graph.get_node program class
   400         val Code_Thingol.Datatype (tyco, _) = Graph.get_node program tyco
   401       in quote (Sign.extern_type thy tyco ^ " :: " ^ Sign.extern_class thy class) end
   402 
   403 fun invoke_serializer thy abortable serializer reserved includes 
   404     module_alias class instance tyco const module args naming program2 names1 =
   405   let
   406     fun distill_names lookup_name src_tab = Symtab.empty
   407       |> fold_map (fn thing_identifier => fn tab => case lookup_name naming thing_identifier
   408            of SOME name => (SOME name, Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   409             | NONE => (NONE, tab)) (Symtab.keys src_tab)
   410       |>> map_filter I;
   411     fun lookup_classparam_rev c' = case try (Graph.get_node program2) c'
   412      of SOME (Code_Thingol.Classparam (c, _)) => SOME c
   413       | NONE => NONE;
   414     fun lookup_tyco_fun naming "fun" = SOME "fun"
   415       | lookup_tyco_fun naming tyco = Code_Thingol.lookup_tyco naming tyco;
   416     val (names_class, class') = distill_names Code_Thingol.lookup_class class;
   417     val class'' = class'
   418       |> (Symtab.map o apsnd) (fn class_params => fn c' =>
   419           case lookup_classparam_rev c'
   420            of SOME c => class_params c
   421             | NONE => NONE)
   422     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   423       (StringPairTab.keys instance);
   424     val (names_tyco, tyco') = distill_names lookup_tyco_fun tyco;
   425     val (names_const, const') = distill_names Code_Thingol.lookup_const const;
   426     val names_hidden = names_class @ names_inst @ names_tyco @ names_const;
   427     val names2 = subtract (op =) names_hidden names1;
   428     val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   429     val names_all = Graph.all_succs program2 names2;
   430     val program4 = Graph.subgraph (member (op =) names_all) program3;
   431     val empty_funs = filter_out (member (op =) abortable)
   432       (Code_Thingol.empty_funs program3);
   433     val _ = if null empty_funs then () else error ("No defining equations for "
   434       ^ commas (map (Sign.extern_const thy) empty_funs));
   435   in
   436     serializer module args (labelled_name thy program2) reserved includes
   437       (Symtab.lookup module_alias) (Symtab.lookup class'')
   438       (Symtab.lookup tyco') (Symtab.lookup const')
   439       naming program4 names2
   440   end;
   441 
   442 fun mount_serializer thy alt_serializer target module args naming program =
   443   let
   444     val (targets, abortable) = CodeTargetData.get thy;
   445     fun collapse_hierarchy target =
   446       let
   447         val data = case Symtab.lookup targets target
   448          of SOME data => data
   449           | NONE => error ("Unknown code target language: " ^ quote target);
   450       in case the_serializer data
   451        of Serializer _ => (I, data)
   452         | Extends (super, modify) => let
   453             val (modify', data') = collapse_hierarchy super
   454           in (modify' #> modify naming, merge_target false target (data', data)) end
   455       end;
   456     val (modify, data) = collapse_hierarchy target;
   457     val (serializer, _) = the_default (case the_serializer data
   458      of Serializer seri => seri) alt_serializer;
   459     val reserved = the_reserved data;
   460     val includes = Symtab.dest (the_includes data);
   461     val module_alias = the_module_alias data;
   462     val { class, instance, tyco, const } = the_name_syntax data;
   463   in
   464     invoke_serializer thy abortable serializer reserved
   465       includes module_alias class instance tyco const module args naming (modify program)
   466   end;
   467 
   468 in
   469 
   470 fun serialize thy = mount_serializer thy NONE;
   471 
   472 fun serialize_custom thy (target_name, seri) naming program cs =
   473   mount_serializer thy (SOME seri) target_name NONE [] naming program cs (String [])
   474   |> the;
   475 
   476 end; (* local *)
   477 
   478 fun parse_args f args =
   479   case Scan.read OuterLex.stopper f args
   480    of SOME x => x
   481     | NONE => error "Bad serializer arguments";
   482 
   483 
   484 (* code presentation *)
   485 
   486 fun code_of thy target module_name cs names_stmt =
   487   let
   488     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy cs;
   489   in
   490     string names_stmt (serialize thy target (SOME module_name) []
   491       naming program names_cs)
   492   end;
   493 
   494 
   495 (* code generation *)
   496 
   497 fun transitivly_non_empty_funs thy naming program =
   498   let
   499     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   500     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   501   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   502 
   503 fun read_const_exprs thy cs =
   504   let
   505     val (cs1, cs2) = Code_Name.read_const_exprs thy cs;
   506     val (names3, (naming, program)) = Code_Thingol.consts_program thy cs2;
   507     val names4 = transitivly_non_empty_funs thy naming program;
   508     val cs5 = map_filter
   509       (fn (c, name) => if member (op =) names4 name then SOME c else NONE) (cs2 ~~ names3);
   510   in fold (insert (op =)) cs5 cs1 end;
   511 
   512 fun cached_program thy = 
   513   let
   514     val (naming, program) = Code_Thingol.cached_program thy;
   515   in (transitivly_non_empty_funs thy naming program, (naming, program)) end
   516 
   517 fun export_code thy cs seris =
   518   let
   519     val (cs', (naming, program)) = if null cs then cached_program thy
   520       else Code_Thingol.consts_program thy cs;
   521     fun mk_seri_dest dest = case dest
   522      of NONE => compile
   523       | SOME "-" => export
   524       | SOME f => file (Path.explode f)
   525     val _ = map (fn (((target, module), dest), args) =>
   526       (mk_seri_dest dest (serialize thy target module args naming program cs'))) seris;
   527   in () end;
   528 
   529 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs) seris;
   530 
   531 
   532 (** Isar setup **)
   533 
   534 val (inK, module_nameK, fileK) = ("in", "module_name", "file");
   535 
   536 fun code_exprP cmd =
   537   (Scan.repeat P.term_group
   538   -- Scan.repeat (P.$$$ inK |-- P.name
   539      -- Scan.option (P.$$$ module_nameK |-- P.name)
   540      -- Scan.option (P.$$$ fileK |-- P.name)
   541      -- Scan.optional (P.$$$ "(" |-- Args.parse --| P.$$$ ")") []
   542   ) >> (fn (raw_cs, seris) => cmd raw_cs seris));
   543 
   544 val _ = List.app OuterKeyword.keyword [inK, module_nameK, fileK];
   545 
   546 val _ =
   547   OuterSyntax.command "code_class" "define code syntax for class" K.thy_decl (
   548     parse_multi_syntax P.xname
   549       (Scan.option (P.string -- Scan.optional (P.$$$ "where" |-- Scan.repeat1
   550         (P.term_group --| (P.$$$ "\<equiv>" || P.$$$ "==") -- P.string)) []))
   551     >> (Toplevel.theory oo fold) (fn (target, syns) =>
   552           fold (fn (raw_class, syn) => add_syntax_class_cmd target raw_class syn) syns)
   553   );
   554 
   555 val _ =
   556   OuterSyntax.command "code_instance" "define code syntax for instance" K.thy_decl (
   557     parse_multi_syntax (P.xname --| P.$$$ "::" -- P.xname)
   558       ((P.minus >> K true) || Scan.succeed false)
   559     >> (Toplevel.theory oo fold) (fn (target, syns) =>
   560           fold (fn (raw_inst, add_del) => add_syntax_inst_cmd target raw_inst add_del) syns)
   561   );
   562 
   563 val _ =
   564   OuterSyntax.command "code_type" "define code syntax for type constructor" K.thy_decl (
   565     parse_multi_syntax P.xname (parse_syntax I)
   566     >> (Toplevel.theory oo fold) (fn (target, syns) =>
   567           fold (fn (raw_tyco, syn) => add_syntax_tyco_cmd target raw_tyco syn) syns)
   568   );
   569 
   570 val _ =
   571   OuterSyntax.command "code_const" "define code syntax for constant" K.thy_decl (
   572     parse_multi_syntax P.term_group (parse_syntax fst)
   573     >> (Toplevel.theory oo fold) (fn (target, syns) =>
   574       fold (fn (raw_const, syn) => add_syntax_const_cmd target raw_const
   575         (Code_Printer.simple_const_syntax syn)) syns)
   576   );
   577 
   578 val _ =
   579   OuterSyntax.command "code_reserved" "declare words as reserved for target language" K.thy_decl (
   580     P.name -- Scan.repeat1 P.name
   581     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   582   );
   583 
   584 val _ =
   585   OuterSyntax.command "code_include" "declare piece of code to be included in generated code" K.thy_decl (
   586     P.name -- P.name -- (P.text >> (fn "-" => NONE | s => SOME s))
   587     >> (fn ((target, name), content) => (Toplevel.theory o add_include target)
   588       (name, content))
   589   );
   590 
   591 val _ =
   592   OuterSyntax.command "code_modulename" "alias module to other name" K.thy_decl (
   593     P.name -- Scan.repeat1 (P.name -- P.name)
   594     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   595   );
   596 
   597 val _ =
   598   OuterSyntax.command "code_abort" "permit constant to be implemented as program abort" K.thy_decl (
   599     Scan.repeat1 P.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   600   );
   601 
   602 val _ =
   603   OuterSyntax.command "export_code" "generate executable code for constants"
   604     K.diag (P.!!! (code_exprP export_code_cmd) >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   605 
   606 end; (*local*)
   607 
   608 end; (*struct*)