src/Tools/Code/code_target.ML
author haftmann
Tue Aug 31 14:43:27 2010 +0200 (2010-08-31)
changeset 38927 544f4702d621
parent 38926 24f82786cc57
child 38928 0e6f54c9d201
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   val export_code_for: theory -> Path.T option -> string -> int option -> string option -> Token.T list
    13     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> unit
    14   val produce_code_for: theory -> string -> int option -> string option -> Token.T list
    15     -> Code_Thingol.naming -> Code_Thingol.program -> string list * string list -> string * string option list
    16   val check_code_for: theory -> string -> bool -> Token.T list
    17     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> unit
    18 
    19   val export_code: theory -> string list
    20     -> (((string * string option) * Path.T option) * Token.T list) list -> unit
    21   val produce_code: theory -> string list -> (Code_Thingol.naming -> string list)
    22     -> string -> int option -> string option -> Token.T list -> string * string option list
    23   val check_code: theory -> string list
    24     -> ((string * bool) * Token.T list) list -> unit
    25 
    26   val shell_command: string (*theory name*) -> string (*export_code expr*) -> unit
    27 
    28   type serializer
    29   type literals = Code_Printer.literals
    30   val add_target: string * { serializer: serializer, literals: literals,
    31     check: { env_var: string, make_destination: Path.T -> Path.T,
    32       make_command: string -> string -> string } } -> theory -> theory
    33   val extend_target: string *
    34       (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    35     -> theory -> theory
    36   val assert_target: theory -> string -> string
    37   val the_literals: theory -> string -> literals
    38   type serialization
    39   val parse_args: 'a parser -> Token.T list -> 'a
    40   val serialization: (int -> Path.T option -> 'a -> unit)
    41     -> (int -> 'a -> string * string option list)
    42     -> 'a -> serialization
    43   val set_default_code_width: int -> theory -> theory
    44 
    45   val allow_abort: string -> theory -> theory
    46   type tyco_syntax = Code_Printer.tyco_syntax
    47   type const_syntax = Code_Printer.const_syntax
    48   val add_class_syntax: string -> class -> string option -> theory -> theory
    49   val add_instance_syntax: string -> class * string -> unit option -> theory -> theory
    50   val add_tyco_syntax: string -> string -> tyco_syntax option -> theory -> theory
    51   val add_const_syntax: string -> string -> const_syntax option -> theory -> theory
    52   val add_reserved: string -> string -> theory -> theory
    53   val add_include: string -> string * (string * string list) option -> theory -> theory
    54 end;
    55 
    56 structure Code_Target : CODE_TARGET =
    57 struct
    58 
    59 open Basic_Code_Thingol;
    60 
    61 type literals = Code_Printer.literals;
    62 type tyco_syntax = Code_Printer.tyco_syntax;
    63 type const_syntax = Code_Printer.const_syntax;
    64 
    65 
    66 (** abstract nonsense **)
    67 
    68 datatype destination = File of Path.T option | String of string list;
    69 type serialization = int -> destination -> (string * string option list) option;
    70 
    71 fun stmt_names_of_destination (String stmt_names) = stmt_names
    72   | stmt_names_of_destination _ = [];
    73 
    74 fun serialization output _ content width (File some_path) = (output width some_path content; NONE)
    75   | serialization _ string content width (String _) = SOME (string width content);
    76 
    77 fun file some_path f = (f (File some_path); ());
    78 fun string stmt_names f = the (f (String stmt_names));
    79 
    80 
    81 (** theory data **)
    82 
    83 datatype symbol_syntax_data = Symbol_Syntax_Data of {
    84   class: string Symtab.table,
    85   instance: unit Symreltab.table,
    86   tyco: Code_Printer.tyco_syntax Symtab.table,
    87   const: Code_Printer.const_syntax Symtab.table
    88 };
    89 
    90 fun make_symbol_syntax_data ((class, instance), (tyco, const)) =
    91   Symbol_Syntax_Data { class = class, instance = instance, tyco = tyco, const = const };
    92 fun map_symbol_syntax_data f (Symbol_Syntax_Data { class, instance, tyco, const }) =
    93   make_symbol_syntax_data (f ((class, instance), (tyco, const)));
    94 fun merge_symbol_syntax_data
    95   (Symbol_Syntax_Data { class = class1, instance = instance1, tyco = tyco1, const = const1 },
    96     Symbol_Syntax_Data { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
    97   make_symbol_syntax_data (
    98     (Symtab.join (K snd) (class1, class2),
    99        Symreltab.join (K snd) (instance1, instance2)),
   100     (Symtab.join (K snd) (tyco1, tyco2),
   101        Symtab.join (K snd) (const1, const2))
   102   );
   103 
   104 type serializer = Token.T list (*arguments*) -> {
   105     labelled_name: string -> string,
   106     reserved_syms: string list,
   107     includes: (string * Pretty.T) list,
   108     single_module: bool,
   109     module_alias: string -> string option,
   110     class_syntax: string -> string option,
   111     tyco_syntax: string -> Code_Printer.tyco_syntax option,
   112     const_syntax: string -> Code_Printer.activated_const_syntax option,
   113     program: Code_Thingol.program,
   114     names: string list,
   115     presentation_names: string list }
   116   -> serialization;
   117 
   118 datatype description = Fundamental of { serializer: serializer,
   119       literals: literals,
   120       check: { env_var: string, make_destination: Path.T -> Path.T,
   121         make_command: string -> string -> string } }
   122   | Extension of string *
   123       (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   124 
   125 datatype target = Target of {
   126   serial: serial,
   127   description: description,
   128   reserved: string list,
   129   includes: (Pretty.T * string list) Symtab.table,
   130   module_alias: string Symtab.table,
   131   symbol_syntax: symbol_syntax_data
   132 };
   133 
   134 fun make_target ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))) =
   135   Target { serial = serial, description = description, reserved = reserved, 
   136     includes = includes, module_alias = module_alias, symbol_syntax = symbol_syntax };
   137 fun map_target f ( Target { serial, description, reserved, includes, module_alias, symbol_syntax } ) =
   138   make_target (f ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))));
   139 fun merge_target strict target (Target { serial = serial1, description = description,
   140   reserved = reserved1, includes = includes1,
   141   module_alias = module_alias1, symbol_syntax = symbol_syntax1 },
   142     Target { serial = serial2, description = _,
   143       reserved = reserved2, includes = includes2,
   144       module_alias = module_alias2, symbol_syntax = symbol_syntax2 }) =
   145   if serial1 = serial2 orelse not strict then
   146     make_target ((serial1, description),
   147       ((merge (op =) (reserved1, reserved2), Symtab.join (K snd) (includes1, includes2)),
   148         (Symtab.join (K snd) (module_alias1, module_alias2),
   149           merge_symbol_syntax_data (symbol_syntax1, symbol_syntax2))
   150     ))
   151   else
   152     error ("Incompatible targets: " ^ quote target);
   153 
   154 fun the_description (Target { description, ... }) = description;
   155 fun the_reserved (Target { reserved, ... }) = reserved;
   156 fun the_includes (Target { includes, ... }) = includes;
   157 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   158 fun the_symbol_syntax (Target { symbol_syntax = Symbol_Syntax_Data x, ... }) = x;
   159 
   160 structure Targets = Theory_Data
   161 (
   162   type T = (target Symtab.table * string list) * int;
   163   val empty = ((Symtab.empty, []), 80);
   164   val extend = I;
   165   fun merge (((target1, exc1), width1), ((target2, exc2), width2)) : T =
   166     ((Symtab.join (merge_target true) (target1, target2),
   167       Library.merge (op =) (exc1, exc2)), Int.max (width1, width2));
   168 );
   169 
   170 val abort_allowed = snd o fst o Targets.get;
   171 
   172 fun assert_target thy target = if Symtab.defined ((fst o fst) (Targets.get thy)) target
   173   then target
   174   else error ("Unknown code target language: " ^ quote target);
   175 
   176 fun put_target (target, seri) thy =
   177   let
   178     val lookup_target = Symtab.lookup ((fst o fst) (Targets.get thy));
   179     val _ = case seri
   180      of Extension (super, _) => if is_some (lookup_target super) then ()
   181           else error ("Unknown code target language: " ^ quote super)
   182       | _ => ();
   183     val overwriting = case (Option.map the_description o lookup_target) target
   184      of NONE => false
   185       | SOME (Extension _) => true
   186       | SOME (Fundamental _) => (case seri
   187          of Extension _ => error ("Will not overwrite existing target " ^ quote target)
   188           | _ => true);
   189     val _ = if overwriting
   190       then warning ("Overwriting existing target " ^ quote target)
   191       else (); 
   192   in
   193     thy
   194     |> (Targets.map o apfst o apfst o Symtab.update)
   195           (target, make_target ((serial (), seri), (([], Symtab.empty),
   196             (Symtab.empty, make_symbol_syntax_data ((Symtab.empty, Symreltab.empty),
   197               (Symtab.empty, Symtab.empty))))))
   198   end;
   199 
   200 fun add_target (target, seri) = put_target (target, Fundamental seri);
   201 fun extend_target (target, (super, modify)) =
   202   put_target (target, Extension (super, modify));
   203 
   204 fun map_target_data target f thy =
   205   let
   206     val _ = assert_target thy target;
   207   in
   208     thy
   209     |> (Targets.map o apfst o apfst o Symtab.map_entry target o map_target) f
   210   end;
   211 
   212 fun map_reserved target =
   213   map_target_data target o apsnd o apfst o apfst;
   214 fun map_includes target =
   215   map_target_data target o apsnd o apfst o apsnd;
   216 fun map_module_alias target =
   217   map_target_data target o apsnd o apsnd o apfst;
   218 fun map_symbol_syntax target =
   219   map_target_data target o apsnd o apsnd o apsnd o map_symbol_syntax_data;
   220 
   221 fun set_default_code_width k = (Targets.map o apsnd) (K k);
   222 
   223 
   224 (** serializer usage **)
   225 
   226 (* montage *)
   227 
   228 fun the_fundamental thy =
   229   let
   230     val ((targets, _), _) = Targets.get thy;
   231     fun fundamental target = case Symtab.lookup targets target
   232      of SOME data => (case the_description data
   233          of Fundamental data => data
   234           | Extension (super, _) => fundamental super)
   235       | NONE => error ("Unknown code target language: " ^ quote target);
   236   in fundamental end;
   237 
   238 fun the_literals thy = #literals o the_fundamental thy;
   239 
   240 local
   241 
   242 fun activate_target_for thy target naming program =
   243   let
   244     val ((targets, abortable), default_width) = Targets.get thy;
   245     fun collapse_hierarchy target =
   246       let
   247         val data = case Symtab.lookup targets target
   248          of SOME data => data
   249           | NONE => error ("Unknown code target language: " ^ quote target);
   250       in case the_description data
   251        of Fundamental _ => (I, data)
   252         | Extension (super, modify) => let
   253             val (modify', data') = collapse_hierarchy super
   254           in (modify' #> modify naming, merge_target false target (data', data)) end
   255       end;
   256     val (modify, data) = collapse_hierarchy target;
   257   in (default_width, abortable, data, modify program) end;
   258 
   259 fun activate_syntax lookup_name src_tab = Symtab.empty
   260   |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   261        of SOME name => (SOME name,
   262             Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   263         | NONE => (NONE, tab)) (Symtab.keys src_tab)
   264   |>> map_filter I;
   265 
   266 fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   267   |> fold_map (fn c => fn (tab, naming) =>
   268       case Code_Thingol.lookup_const naming c
   269        of SOME name => let
   270               val (syn, naming') = Code_Printer.activate_const_syntax thy
   271                 literals c (the (Symtab.lookup src_tab c)) naming
   272             in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   273         | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   274   |>> map_filter I;
   275 
   276 fun activate_symbol_syntax thy literals naming
   277     class_syntax instance_syntax tyco_syntax const_syntax =
   278   let
   279     val (names_class, class_syntax') =
   280       activate_syntax (Code_Thingol.lookup_class naming) class_syntax;
   281     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   282       (Symreltab.keys instance_syntax);
   283     val (names_tyco, tyco_syntax') =
   284       activate_syntax (Code_Thingol.lookup_tyco naming) tyco_syntax;
   285     val (names_const, (const_syntax', _)) =
   286       activate_const_syntax thy literals const_syntax naming;
   287   in
   288     (names_class @ names_inst @ names_tyco @ names_const,
   289       (class_syntax', tyco_syntax', const_syntax'))
   290   end;
   291 
   292 fun project_program thy abortable names_hidden names1 program2 =
   293   let
   294     val names2 = subtract (op =) names_hidden names1;
   295     val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   296     val names_all = Graph.all_succs program3 names2;
   297     val empty_funs = filter_out (member (op =) abortable)
   298       (Code_Thingol.empty_funs program3);
   299     val _ = if null empty_funs then () else error ("No code equations for "
   300       ^ commas (map (Sign.extern_const thy) empty_funs));
   301   in (names_all, program3) end;
   302 
   303 fun invoke_serializer thy abortable serializer literals reserved abs_includes 
   304     module_alias proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax
   305     module_name args naming proto_program (names, presentation_names) =
   306   let
   307     val (names_hidden, (class_syntax, tyco_syntax, const_syntax)) =
   308       activate_symbol_syntax thy literals naming
   309         proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax;
   310     val (names_all, program) = project_program thy abortable names_hidden names proto_program;
   311     val includes = abs_includes names_all;
   312   in
   313     serializer args {
   314       labelled_name = Code_Thingol.labelled_name thy proto_program,
   315       reserved_syms = reserved,
   316       includes = includes,
   317       single_module = is_some module_name,
   318       module_alias = if is_some module_name then K module_name else Symtab.lookup module_alias,
   319       class_syntax = Symtab.lookup class_syntax,
   320       tyco_syntax = Symtab.lookup tyco_syntax,
   321       const_syntax = Symtab.lookup const_syntax,
   322       program = program,
   323       names = names,
   324       presentation_names = presentation_names }
   325   end;
   326 
   327 fun mount_serializer thy target some_width raw_module_name args naming proto_program names destination =
   328   let
   329     val (default_width, abortable, data, program) =
   330       activate_target_for thy target naming proto_program;
   331     val serializer = case the_description data
   332      of Fundamental seri => #serializer seri;
   333     val presentation_names = stmt_names_of_destination destination;
   334     val module_name = if null presentation_names
   335       then raw_module_name else SOME "Code";
   336     val reserved = the_reserved data;
   337     fun select_include names_all (name, (content, cs)) =
   338       if null cs then SOME (name, content)
   339       else if exists (fn c => case Code_Thingol.lookup_const naming c
   340        of SOME name => member (op =) names_all name
   341         | NONE => false) cs
   342       then SOME (name, content) else NONE;
   343     fun includes names_all = map_filter (select_include names_all)
   344       ((Symtab.dest o the_includes) data);
   345     val module_alias = the_module_alias data 
   346     val { class, instance, tyco, const } = the_symbol_syntax data;
   347     val literals = the_literals thy target;
   348     val width = the_default default_width some_width;
   349   in
   350     invoke_serializer thy abortable serializer literals reserved
   351       includes module_alias class instance tyco const module_name args
   352         naming program (names, presentation_names) width destination
   353   end;
   354 
   355 in
   356 
   357 fun export_code_for thy some_path target some_width some_module_name args naming program names =
   358   file some_path (mount_serializer thy target some_width some_module_name args naming program names);
   359 
   360 fun produce_code_for thy target some_width some_module_name args naming program (names, selects) =
   361   string selects (mount_serializer thy target some_width some_module_name args naming program names);
   362 
   363 fun check_code_for thy target strict args naming program names_cs =
   364   let
   365     val module_name = "Code_Test";
   366     val { env_var, make_destination, make_command } =
   367       (#check o the_fundamental thy) target;
   368     val env_param = getenv env_var;
   369     fun ext_check env_param p =
   370       let 
   371         val destination = make_destination p;
   372         val _ = file (SOME destination) (mount_serializer thy target (SOME 80)
   373           (SOME module_name) args naming program names_cs);
   374         val cmd = make_command env_param module_name;
   375       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   376         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   377         else ()
   378       end;
   379   in if env_param = ""
   380     then if strict
   381       then error (env_var ^ " not set; cannot check code for " ^ target)
   382       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   383     else Cache_IO.with_tmp_dir "Code_Test" (ext_check env_param)
   384   end;
   385 
   386 end; (* local *)
   387 
   388 
   389 (* code generation *)
   390 
   391 fun transitivly_non_empty_funs thy naming program =
   392   let
   393     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   394     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   395   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   396 
   397 fun read_const_exprs thy cs =
   398   let
   399     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   400     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   401     val names3 = transitivly_non_empty_funs thy naming program;
   402     val cs3 = map_filter (fn (c, name) =>
   403       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   404   in union (op =) cs3 cs1 end;
   405 
   406 fun prep_destination "" = NONE
   407   | prep_destination "-" = NONE
   408   | prep_destination s = SOME (Path.explode s);
   409 
   410 fun export_code thy cs seris =
   411   let
   412     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   413     val _ = map (fn (((target, module_name), some_path), args) =>
   414       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   415   in () end;
   416 
   417 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   418   ((map o apfst o apsnd) prep_destination seris);
   419 
   420 fun produce_code thy cs names_stmt target some_width some_module_name args =
   421   let
   422     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   423   in produce_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   424 
   425 fun check_code thy cs seris =
   426   let
   427     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   428     val _ = map (fn ((target, strict), args) =>
   429       check_code_for thy target strict args naming program names_cs) seris;
   430   in () end;
   431 
   432 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   433 
   434 
   435 (** serializer configuration **)
   436 
   437 (* data access *)
   438 
   439 fun cert_class thy class =
   440   let
   441     val _ = AxClass.get_info thy class;
   442   in class end;
   443 
   444 fun read_class thy = cert_class thy o Sign.intern_class thy;
   445 
   446 fun cert_tyco thy tyco =
   447   let
   448     val _ = if Sign.declared_tyname thy tyco then ()
   449       else error ("No such type constructor: " ^ quote tyco);
   450   in tyco end;
   451 
   452 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   453 
   454 fun cert_inst thy (class, tyco) =
   455   (cert_class thy class, cert_tyco thy tyco);
   456 
   457 fun read_inst thy (raw_tyco, raw_class) =
   458   (read_class thy raw_class, read_tyco thy raw_tyco);
   459 
   460 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   461   let
   462     val x = prep_x thy raw_x;
   463     val change = case some_raw_syn
   464      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   465       | NONE => del x;
   466   in (map_symbol_syntax target o mapp) change thy end;
   467 
   468 fun gen_add_class_syntax prep_class =
   469   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   470 
   471 fun gen_add_instance_syntax prep_inst =
   472   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   473 
   474 fun gen_add_tyco_syntax prep_tyco =
   475   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   476     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   477       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   478       else syn);
   479 
   480 fun gen_add_const_syntax prep_const =
   481   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   482     (fn thy => fn c => fn syn =>
   483       if Code_Printer.requires_args syn > Code.args_number thy c
   484       then error ("Too many arguments in syntax for constant " ^ quote c)
   485       else syn);
   486 
   487 fun add_reserved target =
   488   let
   489     fun add sym syms = if member (op =) syms sym
   490       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   491       else insert (op =) sym syms
   492   in map_reserved target o add end;
   493 
   494 fun gen_add_include read_const target args thy =
   495   let
   496     fun add (name, SOME (content, raw_cs)) incls =
   497           let
   498             val _ = if Symtab.defined incls name
   499               then warning ("Overwriting existing include " ^ name)
   500               else ();
   501             val cs = map (read_const thy) raw_cs;
   502           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   503       | add (name, NONE) incls = Symtab.delete name incls;
   504   in map_includes target (add args) thy end;
   505 
   506 val add_include = gen_add_include (K I);
   507 val add_include_cmd = gen_add_include Code.read_const;
   508 
   509 fun add_module_alias target (thyname, modlname) =
   510   let
   511     val xs = Long_Name.explode modlname;
   512     val xs' = map (Name.desymbolize true) xs;
   513   in if xs' = xs
   514     then map_module_alias target (Symtab.update (thyname, modlname))
   515     else error ("Invalid module name: " ^ quote modlname ^ "\n"
   516       ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   517   end;
   518 
   519 fun gen_allow_abort prep_const raw_c thy =
   520   let
   521     val c = prep_const thy raw_c;
   522   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   523 
   524 
   525 (* concrete syntax *)
   526 
   527 local
   528 
   529 fun zip_list (x::xs) f g =
   530   f
   531   :|-- (fn y =>
   532     fold_map (fn x => g |-- f >> pair x) xs
   533     :|-- (fn xys => pair ((x, y) :: xys)));
   534 
   535 fun process_multi_syntax parse_thing parse_syntax change =
   536   (Parse.and_list1 parse_thing
   537   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   538         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   539   >> (Toplevel.theory oo fold)
   540     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   541 
   542 in
   543 
   544 val add_class_syntax = gen_add_class_syntax cert_class;
   545 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   546 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   547 val add_const_syntax = gen_add_const_syntax (K I);
   548 val allow_abort = gen_allow_abort (K I);
   549 val add_reserved = add_reserved;
   550 val add_include = add_include;
   551 
   552 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   553 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   554 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   555 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   556 val allow_abort_cmd = gen_allow_abort Code.read_const;
   557 
   558 fun parse_args f args =
   559   case Scan.read Token.stopper f args
   560    of SOME x => x
   561     | NONE => error "Bad serializer arguments";
   562 
   563 
   564 (** Isar setup **)
   565 
   566 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   567 
   568 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   569 
   570 val code_exprP =
   571   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   572     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   573       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   574       >> (fn seris => check_code_cmd raw_cs seris)
   575     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   576        -- Scan.option (Parse.$$$ module_nameK |-- Parse.name)
   577        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   578        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   579 
   580 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   581 
   582 val _ =
   583   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   584     process_multi_syntax Parse.xname (Scan.option Parse.string)
   585     add_class_syntax_cmd);
   586 
   587 val _ =
   588   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   589     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   590       (Scan.option (Parse.minus >> K ()))
   591     add_instance_syntax_cmd);
   592 
   593 val _ =
   594   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   595     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   596     add_tyco_syntax_cmd);
   597 
   598 val _ =
   599   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   600     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   601     add_const_syntax_cmd);
   602 
   603 val _ =
   604   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   605     Keyword.thy_decl (
   606     Parse.name -- Scan.repeat1 Parse.name
   607     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   608   );
   609 
   610 val _ =
   611   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   612     Keyword.thy_decl (
   613     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   614       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   615     >> (fn ((target, name), content_consts) =>
   616         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   617   );
   618 
   619 val _ =
   620   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   621     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   622     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   623   );
   624 
   625 val _ =
   626   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   627     Keyword.thy_decl (
   628     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   629   );
   630 
   631 val _ =
   632   Outer_Syntax.command "export_code" "generate executable code for constants"
   633     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   634 
   635 fun shell_command thyname cmd = Toplevel.program (fn _ =>
   636   (use_thy thyname; case Scan.read Token.stopper (Parse.!!! code_exprP)
   637     ((filter Token.is_proper o Outer_Syntax.scan Position.none) cmd)
   638    of SOME f => (writeln "Now generating code..."; f (Thy_Info.get_theory thyname))
   639     | NONE => error ("Bad directive " ^ quote cmd)))
   640   handle Runtime.TOPLEVEL_ERROR => OS.Process.exit OS.Process.failure;
   641 
   642 end; (*local*)
   643 
   644 end; (*struct*)