src/Tools/Code/code_target.ML
author haftmann
Mon Aug 30 16:33:06 2010 +0200 (2010-08-30)
changeset 38916 c0b857a04758
parent 38914 0a49a34e5d37
child 38917 c7da3cc88135
permissions -rw-r--r--
tuned
     1 (*  Title:      Tools/Code/code_target.ML
     2     Author:     Florian Haftmann, TU Muenchen
     3 
     4 Generic infrastructure for target language data.
     5 *)
     6 
     7 signature CODE_TARGET =
     8 sig
     9   val cert_tyco: theory -> string -> string
    10   val read_tyco: theory -> string -> string
    11 
    12   type serializer
    13   type literals = Code_Printer.literals
    14   val add_target: string * { serializer: serializer, literals: literals,
    15     check: { env_var: string, make_destination: Path.T -> Path.T,
    16       make_command: string -> string -> string } } -> theory -> theory
    17   val extend_target: string *
    18       (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    19     -> theory -> theory
    20   val assert_target: theory -> string -> string
    21 
    22   type destination
    23   type serialization
    24   val parse_args: 'a parser -> Token.T list -> 'a
    25   val serialization: (int -> Path.T option -> 'a -> unit)
    26     -> (int -> 'a -> string * string option list)
    27     -> 'a -> int -> serialization
    28   val serialize: theory -> string -> int option -> string option -> Token.T list
    29     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> serialization
    30   val serialize_custom: theory -> string * serializer -> string option
    31     -> Code_Thingol.naming -> Code_Thingol.program -> string list
    32     -> string * string option list
    33   val the_literals: theory -> string -> literals
    34   val file: Path.T option -> serialization -> unit
    35   val string: string list -> serialization -> string
    36   val code_of: theory -> string -> int option -> string
    37     -> string list -> (Code_Thingol.naming -> string list) -> string
    38   val set_default_code_width: int -> theory -> theory
    39   val shell_command: string (*theory name*) -> string (*export_code expr*) -> unit
    40 
    41   val allow_abort: string -> theory -> theory
    42   type tyco_syntax = Code_Printer.tyco_syntax
    43   type const_syntax = Code_Printer.const_syntax
    44   val add_syntax_class: string -> class -> string option -> theory -> theory
    45   val add_syntax_inst: string -> class * string -> unit option -> 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   val add_include: string -> string * (string * string list) option -> theory -> theory
    50 end;
    51 
    52 structure Code_Target : CODE_TARGET =
    53 struct
    54 
    55 open Basic_Code_Thingol;
    56 
    57 type literals = Code_Printer.literals;
    58 type tyco_syntax = Code_Printer.tyco_syntax;
    59 type const_syntax = Code_Printer.const_syntax;
    60 
    61 
    62 (** basics **)
    63 
    64 datatype destination = File of Path.T option | String of string list;
    65 type serialization = destination -> (string * string option list) option;
    66 
    67 fun file some_path f = (f (File some_path); ());
    68 fun string stmt_names f = fst (the (f (String stmt_names)));
    69 
    70 fun stmt_names_of_destination (String stmt_names) = stmt_names
    71   | stmt_names_of_destination _ = [];
    72 
    73 fun serialization output _ pretty width (File some_path) = (output width some_path pretty; NONE)
    74   | serialization _ string pretty width (String _) = SOME (string width pretty);
    75 
    76 
    77 (** theory data **)
    78 
    79 datatype name_syntax_table = NameSyntaxTable of {
    80   class: string Symtab.table,
    81   instance: unit Symreltab.table,
    82   tyco: Code_Printer.tyco_syntax Symtab.table,
    83   const: Code_Printer.const_syntax Symtab.table
    84 };
    85 
    86 fun mk_name_syntax_table ((class, instance), (tyco, const)) =
    87   NameSyntaxTable { class = class, instance = instance, tyco = tyco, const = const };
    88 fun map_name_syntax_table f (NameSyntaxTable { class, instance, tyco, const }) =
    89   mk_name_syntax_table (f ((class, instance), (tyco, const)));
    90 fun merge_name_syntax_table
    91   (NameSyntaxTable { class = class1, instance = instance1, tyco = tyco1, const = const1 },
    92     NameSyntaxTable { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
    93   mk_name_syntax_table (
    94     (Symtab.join (K snd) (class1, class2),
    95        Symreltab.join (K snd) (instance1, instance2)),
    96     (Symtab.join (K snd) (tyco1, tyco2),
    97        Symtab.join (K snd) (const1, const2))
    98   );
    99 
   100 type serializer =
   101   string option                         (*module name*)
   102   -> Token.T list                       (*arguments*)
   103   -> (string -> string)                 (*labelled_name*)
   104   -> string list                        (*reserved symbols*)
   105   -> (string * Pretty.T) list           (*includes*)
   106   -> (string -> string option)          (*module aliasses*)
   107   -> (string -> string option)          (*class syntax*)
   108   -> (string -> Code_Printer.tyco_syntax option)
   109   -> (string -> Code_Printer.activated_const_syntax option)
   110   -> Code_Thingol.program
   111   -> (string list * string list)        (*selected statements*)
   112   -> int
   113   -> serialization;
   114 
   115 datatype description = Fundamental of { serializer: serializer,
   116       literals: literals,
   117       check: { env_var: string, make_destination: Path.T -> Path.T,
   118         make_command: string -> string -> string } }
   119   | Extension of string *
   120       (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   121 
   122 datatype target = Target of {
   123   serial: serial,
   124   description: description,
   125   reserved: string list,
   126   includes: (Pretty.T * string list) Symtab.table,
   127   name_syntax_table: name_syntax_table,
   128   module_alias: string Symtab.table
   129 };
   130 
   131 fun make_target ((serial, description), ((reserved, includes), (name_syntax_table, module_alias))) =
   132   Target { serial = serial, description = description, reserved = reserved, 
   133     includes = includes, name_syntax_table = name_syntax_table, module_alias = module_alias };
   134 fun map_target f ( Target { serial, description, reserved, includes, name_syntax_table, module_alias } ) =
   135   make_target (f ((serial, description), ((reserved, includes), (name_syntax_table, module_alias))));
   136 fun merge_target strict target (Target { serial = serial1, description = description,
   137   reserved = reserved1, includes = includes1,
   138   name_syntax_table = name_syntax_table1, module_alias = module_alias1 },
   139     Target { serial = serial2, description = _,
   140       reserved = reserved2, includes = includes2,
   141       name_syntax_table = name_syntax_table2, module_alias = module_alias2 }) =
   142   if serial1 = serial2 orelse not strict then
   143     make_target ((serial1, description),
   144       ((merge (op =) (reserved1, reserved2), Symtab.join (K snd) (includes1, includes2)),
   145         (merge_name_syntax_table (name_syntax_table1, name_syntax_table2),
   146           Symtab.join (K snd) (module_alias1, module_alias2))
   147     ))
   148   else
   149     error ("Incompatible targets: " ^ quote target);
   150 
   151 fun the_description (Target { description, ... }) = description;
   152 fun the_reserved (Target { reserved, ... }) = reserved;
   153 fun the_includes (Target { includes, ... }) = includes;
   154 fun the_name_syntax (Target { name_syntax_table = NameSyntaxTable x, ... }) = x;
   155 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   156 
   157 structure Targets = Theory_Data
   158 (
   159   type T = (target Symtab.table * string list) * int;
   160   val empty = ((Symtab.empty, []), 80);
   161   val extend = I;
   162   fun merge (((target1, exc1), width1), ((target2, exc2), width2)) : T =
   163     ((Symtab.join (merge_target true) (target1, target2),
   164       Library.merge (op =) (exc1, exc2)), Int.max (width1, width2));
   165 );
   166 
   167 val abort_allowed = snd o fst o Targets.get;
   168 
   169 fun assert_target thy target = if Symtab.defined ((fst o fst) (Targets.get thy)) target
   170   then target
   171   else error ("Unknown code target language: " ^ quote target);
   172 
   173 fun put_target (target, seri) thy =
   174   let
   175     val lookup_target = Symtab.lookup ((fst o fst) (Targets.get thy));
   176     val _ = case seri
   177      of Extension (super, _) => if is_some (lookup_target super) then ()
   178           else error ("Unknown code target language: " ^ quote super)
   179       | _ => ();
   180     val overwriting = case (Option.map the_description o lookup_target) target
   181      of NONE => false
   182       | SOME (Extension _) => true
   183       | SOME (Fundamental _) => (case seri
   184          of Extension _ => error ("Will not overwrite existing target " ^ quote target)
   185           | _ => true);
   186     val _ = if overwriting
   187       then warning ("Overwriting existing target " ^ quote target)
   188       else (); 
   189   in
   190     thy
   191     |> (Targets.map o apfst o apfst o Symtab.update)
   192           (target, make_target ((serial (), seri), (([], Symtab.empty),
   193             (mk_name_syntax_table ((Symtab.empty, Symreltab.empty),
   194               (Symtab.empty, Symtab.empty)), Symtab.empty))))
   195   end;
   196 
   197 fun add_target (target, seri) = put_target (target, Fundamental seri);
   198 fun extend_target (target, (super, modify)) =
   199   put_target (target, Extension (super, modify));
   200 
   201 fun map_target_data target f thy =
   202   let
   203     val _ = assert_target thy target;
   204   in
   205     thy
   206     |> (Targets.map o apfst o apfst o Symtab.map_entry target o map_target) f
   207   end;
   208 
   209 fun map_reserved target =
   210   map_target_data target o apsnd o apfst o apfst;
   211 fun map_includes target =
   212   map_target_data target o apsnd o apfst o apsnd;
   213 fun map_name_syntax target =
   214   map_target_data target o apsnd o apsnd o apfst o map_name_syntax_table;
   215 fun map_module_alias target =
   216   map_target_data target o apsnd o apsnd o apsnd;
   217 
   218 fun set_default_code_width k = (Targets.map o apsnd) (K k);
   219 
   220 
   221 (** serializer usage **)
   222 
   223 (* montage *)
   224 
   225 fun the_fundamental thy =
   226   let
   227     val ((targets, _), _) = Targets.get thy;
   228     fun fundamental target = case Symtab.lookup targets target
   229      of SOME data => (case the_description data
   230          of Fundamental data => data
   231           | Extension (super, _) => fundamental super)
   232       | NONE => error ("Unknown code target language: " ^ quote target);
   233   in fundamental end;
   234 
   235 fun the_literals thy = #literals o the_fundamental thy;
   236 
   237 local
   238 
   239 fun activate_syntax lookup_name src_tab = Symtab.empty
   240   |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   241        of SOME name => (SOME name,
   242             Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   243         | NONE => (NONE, tab)) (Symtab.keys src_tab)
   244   |>> map_filter I;
   245 
   246 fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   247   |> fold_map (fn c => fn (tab, naming) =>
   248       case Code_Thingol.lookup_const naming c
   249        of SOME name => let
   250               val (syn, naming') = Code_Printer.activate_const_syntax thy
   251                 literals c (the (Symtab.lookup src_tab c)) naming
   252             in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   253         | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   254   |>> map_filter I;
   255 
   256 fun invoke_serializer thy abortable serializer literals reserved abs_includes 
   257     module_alias class instance tyco const module_name args naming program2 (names1, presentation_names) width =
   258   let
   259     val (names_class, class') =
   260       activate_syntax (Code_Thingol.lookup_class naming) class;
   261     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   262       (Symreltab.keys instance);
   263     val (names_tyco, tyco') =
   264       activate_syntax (Code_Thingol.lookup_tyco naming) tyco;
   265     val (names_const, (const', _)) =
   266       activate_const_syntax thy literals const naming;
   267     val names_hidden = names_class @ names_inst @ names_tyco @ names_const;
   268     val names2 = subtract (op =) names_hidden names1;
   269     val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   270     val names_all = Graph.all_succs program3 names2;
   271     val includes = abs_includes names_all;
   272     val program4 = Graph.subgraph (member (op =) names_all) program3;
   273     val empty_funs = filter_out (member (op =) abortable)
   274       (Code_Thingol.empty_funs program3);
   275     val _ = if null empty_funs then () else error ("No code equations for "
   276       ^ commas (map (Sign.extern_const thy) empty_funs));
   277   in
   278     serializer module_name args (Code_Thingol.labelled_name thy program2) reserved includes
   279       (if is_some module_name then K module_name else Symtab.lookup module_alias)
   280       (Symtab.lookup class') (Symtab.lookup tyco') (Symtab.lookup const')
   281       program4 (names1, presentation_names) width
   282   end;
   283 
   284 fun mount_serializer thy alt_serializer target some_width raw_module_name args naming program names destination =
   285   let
   286     val ((targets, abortable), default_width) = Targets.get thy;
   287     fun collapse_hierarchy target =
   288       let
   289         val data = case Symtab.lookup targets target
   290          of SOME data => data
   291           | NONE => error ("Unknown code target language: " ^ quote target);
   292       in case the_description data
   293        of Fundamental _ => (I, data)
   294         | Extension (super, modify) => let
   295             val (modify', data') = collapse_hierarchy super
   296           in (modify' #> modify naming, merge_target false target (data', data)) end
   297       end;
   298     val (modify, data) = collapse_hierarchy target;
   299     val serializer = the_default (case the_description data
   300      of Fundamental seri => #serializer seri) alt_serializer;
   301     val presentation_names = stmt_names_of_destination destination;
   302     val module_name = if null presentation_names
   303       then raw_module_name else SOME "Code";
   304     val reserved = the_reserved data;
   305     fun select_include names_all (name, (content, cs)) =
   306       if null cs then SOME (name, content)
   307       else if exists (fn c => case Code_Thingol.lookup_const naming c
   308        of SOME name => member (op =) names_all name
   309         | NONE => false) cs
   310       then SOME (name, content) else NONE;
   311     fun includes names_all = map_filter (select_include names_all)
   312       ((Symtab.dest o the_includes) data);
   313     val module_alias = the_module_alias data 
   314     val { class, instance, tyco, const } = the_name_syntax data;
   315     val literals = the_literals thy target;
   316     val width = the_default default_width some_width;
   317   in
   318     invoke_serializer thy abortable serializer literals reserved
   319       includes module_alias class instance tyco const module_name args
   320         naming (modify program) (names, presentation_names) width destination
   321   end;
   322 
   323 in
   324 
   325 fun serialize thy = mount_serializer thy NONE;
   326 
   327 fun check thy names_cs naming program target strict args =
   328   let
   329     val module_name = "Code_Test";
   330     val { env_var, make_destination, make_command } =
   331       (#check o the_fundamental thy) target;
   332     val env_param = getenv env_var;
   333     fun ext_check env_param p =
   334       let 
   335         val destination = make_destination p;
   336         val _ = file (SOME destination) (serialize thy target (SOME 80)
   337           (SOME module_name) args naming program names_cs);
   338         val cmd = make_command env_param module_name;
   339       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   340         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   341         else ()
   342       end;
   343   in if env_param = ""
   344     then if strict
   345       then error (env_var ^ " not set; cannot check code for " ^ target)
   346       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   347     else Cache_IO.with_tmp_dir "Code_Test" (ext_check env_param)
   348   end;
   349 
   350 fun serialize_custom thy (target_name, seri) module_name naming program names =
   351   mount_serializer thy (SOME seri) target_name NONE module_name [] naming program names (String [])
   352   |> the;
   353 
   354 end; (* local *)
   355 
   356 
   357 (* code presentation *)
   358 
   359 fun code_of thy target some_width module_name cs names_stmt =
   360   let
   361     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   362   in
   363     string (names_stmt naming)
   364       (serialize thy target some_width (SOME module_name) [] naming program names_cs)
   365   end;
   366 
   367 
   368 (* code generation *)
   369 
   370 fun transitivly_non_empty_funs thy naming program =
   371   let
   372     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   373     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   374   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   375 
   376 fun read_const_exprs thy cs =
   377   let
   378     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   379     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   380     val names3 = transitivly_non_empty_funs thy naming program;
   381     val cs3 = map_filter (fn (c, name) =>
   382       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   383   in union (op =) cs3 cs1 end;
   384 
   385 fun export_code thy cs seris =
   386   let
   387     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   388     fun mk_destination dest = if dest = "" orelse dest = "-"
   389       then NONE else SOME (Path.explode dest);
   390     val _ = map (fn (((target, module), dest), args) =>
   391       (file (mk_destination dest) (serialize thy target NONE module args naming program names_cs))) seris;
   392   in () end;
   393 
   394 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs) seris;
   395 
   396 fun check_code thy cs seris =
   397   let
   398     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   399     val _ = map (fn ((target, strict), args) => check thy names_cs naming program
   400       target strict args) seris;
   401   in () end;
   402 
   403 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   404 
   405 
   406 (** serializer configuration **)
   407 
   408 (* data access *)
   409 
   410 fun cert_class thy class =
   411   let
   412     val _ = AxClass.get_info thy class;
   413   in class end;
   414 
   415 fun read_class thy = cert_class thy o Sign.intern_class thy;
   416 
   417 fun cert_tyco thy tyco =
   418   let
   419     val _ = if Sign.declared_tyname thy tyco then ()
   420       else error ("No such type constructor: " ^ quote tyco);
   421   in tyco end;
   422 
   423 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   424 
   425 fun cert_inst thy (class, tyco) =
   426   (cert_class thy class, cert_tyco thy tyco);
   427 
   428 fun read_inst thy (raw_tyco, raw_class) =
   429   (read_class thy raw_class, read_tyco thy raw_tyco);
   430 
   431 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   432   let
   433     val x = prep_x thy raw_x;
   434     val change = case some_raw_syn
   435      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   436       | NONE => del x;
   437   in (map_name_syntax target o mapp) change thy end;
   438 
   439 fun gen_add_syntax_class prep_class =
   440   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   441 
   442 fun gen_add_syntax_inst prep_inst =
   443   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   444 
   445 fun gen_add_syntax_tyco prep_tyco =
   446   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   447     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   448       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   449       else syn);
   450 
   451 fun gen_add_syntax_const prep_const =
   452   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   453     (fn thy => fn c => fn syn =>
   454       if Code_Printer.requires_args syn > Code.args_number thy c
   455       then error ("Too many arguments in syntax for constant " ^ quote c)
   456       else syn);
   457 
   458 fun add_reserved target =
   459   let
   460     fun add sym syms = if member (op =) syms sym
   461       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   462       else insert (op =) sym syms
   463   in map_reserved target o add end;
   464 
   465 fun gen_add_include read_const target args thy =
   466   let
   467     fun add (name, SOME (content, raw_cs)) incls =
   468           let
   469             val _ = if Symtab.defined incls name
   470               then warning ("Overwriting existing include " ^ name)
   471               else ();
   472             val cs = map (read_const thy) raw_cs;
   473           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   474       | add (name, NONE) incls = Symtab.delete name incls;
   475   in map_includes target (add args) thy end;
   476 
   477 val add_include = gen_add_include (K I);
   478 val add_include_cmd = gen_add_include Code.read_const;
   479 
   480 fun add_module_alias target (thyname, modlname) =
   481   let
   482     val xs = Long_Name.explode modlname;
   483     val xs' = map (Name.desymbolize true) xs;
   484   in if xs' = xs
   485     then map_module_alias target (Symtab.update (thyname, modlname))
   486     else error ("Invalid module name: " ^ quote modlname ^ "\n"
   487       ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   488   end;
   489 
   490 fun gen_allow_abort prep_const raw_c thy =
   491   let
   492     val c = prep_const thy raw_c;
   493   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   494 
   495 
   496 (* concrete syntax *)
   497 
   498 local
   499 
   500 fun zip_list (x::xs) f g =
   501   f
   502   :|-- (fn y =>
   503     fold_map (fn x => g |-- f >> pair x) xs
   504     :|-- (fn xys => pair ((x, y) :: xys)));
   505 
   506 fun process_multi_syntax parse_thing parse_syntax change =
   507   (Parse.and_list1 parse_thing
   508   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   509         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   510   >> (Toplevel.theory oo fold)
   511     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   512 
   513 in
   514 
   515 val add_syntax_class = gen_add_syntax_class cert_class;
   516 val add_syntax_inst = gen_add_syntax_inst cert_inst;
   517 val add_syntax_tyco = gen_add_syntax_tyco cert_tyco;
   518 val add_syntax_const = gen_add_syntax_const (K I);
   519 val allow_abort = gen_allow_abort (K I);
   520 val add_reserved = add_reserved;
   521 val add_include = add_include;
   522 
   523 val add_syntax_class_cmd = gen_add_syntax_class read_class;
   524 val add_syntax_inst_cmd = gen_add_syntax_inst read_inst;
   525 val add_syntax_tyco_cmd = gen_add_syntax_tyco read_tyco;
   526 val add_syntax_const_cmd = gen_add_syntax_const Code.read_const;
   527 val allow_abort_cmd = gen_allow_abort Code.read_const;
   528 
   529 fun parse_args f args =
   530   case Scan.read Token.stopper f args
   531    of SOME x => x
   532     | NONE => error "Bad serializer arguments";
   533 
   534 
   535 (** Isar setup **)
   536 
   537 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   538 
   539 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   540 
   541 val code_exprP =
   542   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   543     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   544       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   545       >> (fn seris => check_code_cmd raw_cs seris)
   546     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   547        -- Scan.option (Parse.$$$ module_nameK |-- Parse.name)
   548        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   549        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   550 
   551 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   552 
   553 val _ =
   554   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   555     process_multi_syntax Parse.xname (Scan.option Parse.string)
   556     add_syntax_class_cmd);
   557 
   558 val _ =
   559   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   560     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   561       (Scan.option (Parse.minus >> K ()))
   562     add_syntax_inst_cmd);
   563 
   564 val _ =
   565   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   566     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   567     add_syntax_tyco_cmd);
   568 
   569 val _ =
   570   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   571     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   572     add_syntax_const_cmd);
   573 
   574 val _ =
   575   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   576     Keyword.thy_decl (
   577     Parse.name -- Scan.repeat1 Parse.name
   578     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   579   );
   580 
   581 val _ =
   582   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   583     Keyword.thy_decl (
   584     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   585       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   586     >> (fn ((target, name), content_consts) =>
   587         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   588   );
   589 
   590 val _ =
   591   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   592     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   593     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   594   );
   595 
   596 val _ =
   597   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   598     Keyword.thy_decl (
   599     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   600   );
   601 
   602 val _ =
   603   Outer_Syntax.command "export_code" "generate executable code for constants"
   604     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   605 
   606 fun shell_command thyname cmd = Toplevel.program (fn _ =>
   607   (use_thy thyname; case Scan.read Token.stopper (Parse.!!! code_exprP)
   608     ((filter Token.is_proper o Outer_Syntax.scan Position.none) cmd)
   609    of SOME f => (writeln "Now generating code..."; f (Thy_Info.get_theory thyname))
   610     | NONE => error ("Bad directive " ^ quote cmd)))
   611   handle Runtime.TOPLEVEL_ERROR => OS.Process.exit OS.Process.failure;
   612 
   613 end; (*local*)
   614 
   615 end; (*struct*)