src/Tools/Code/code_target.ML
author haftmann
Thu Sep 02 19:08:48 2010 +0200 (2010-09-02)
changeset 39102 4ae1d212100f
parent 39058 551fe1af03b0
child 39142 f63715f00fdd
permissions -rw-r--r--
hand out deresolver from serializer invocation
     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   val read_const_exprs: theory -> string list -> string list
    12 
    13   val export_code_for: theory -> Path.T option -> string -> int option -> string -> Token.T list
    14     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> unit
    15   val produce_code_for: theory -> string -> int option -> string -> Token.T list
    16     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> string * string option list
    17   val present_code_for: theory -> string -> int option -> string -> Token.T list
    18     -> Code_Thingol.naming -> Code_Thingol.program -> string list * string list -> string
    19   val check_code_for: theory -> string -> bool -> Token.T list
    20     -> Code_Thingol.naming -> Code_Thingol.program -> string list -> unit
    21 
    22   val export_code: theory -> string list
    23     -> (((string * string) * Path.T option) * Token.T list) list -> unit
    24   val produce_code: theory -> string list
    25     -> string -> int option -> string -> Token.T list -> string * string option list
    26   val present_code: theory -> string list -> (Code_Thingol.naming -> string list)
    27     -> string -> int option -> string -> Token.T list -> string
    28   val check_code: theory -> string list
    29     -> ((string * bool) * Token.T list) list -> unit
    30 
    31   val shell_command: string (*theory name*) -> string (*export_code expr*) -> unit
    32 
    33   type serializer
    34   type literals = Code_Printer.literals
    35   val add_target: string * { serializer: serializer, literals: literals,
    36     check: { env_var: string, make_destination: Path.T -> Path.T,
    37       make_command: string -> string -> string } } -> theory -> theory
    38   val extend_target: string *
    39       (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    40     -> theory -> theory
    41   val assert_target: theory -> string -> string
    42   val the_literals: theory -> string -> literals
    43   type serialization
    44   val parse_args: 'a parser -> Token.T list -> 'a
    45   val serialization: (int -> Path.T option -> 'a -> unit)
    46     -> (string list -> int -> 'a -> string * (string -> string option))
    47     -> 'a -> serialization
    48   val set_default_code_width: int -> theory -> theory
    49 
    50   val allow_abort: string -> theory -> theory
    51   type tyco_syntax = Code_Printer.tyco_syntax
    52   type const_syntax = Code_Printer.const_syntax
    53   val add_class_syntax: string -> class -> string option -> theory -> theory
    54   val add_instance_syntax: string -> class * string -> unit option -> theory -> theory
    55   val add_tyco_syntax: string -> string -> tyco_syntax option -> theory -> theory
    56   val add_const_syntax: string -> string -> const_syntax option -> theory -> theory
    57   val add_reserved: string -> string -> theory -> theory
    58   val add_include: string -> string * (string * string list) option -> theory -> theory
    59 end;
    60 
    61 structure Code_Target : CODE_TARGET =
    62 struct
    63 
    64 open Basic_Code_Thingol;
    65 
    66 type literals = Code_Printer.literals;
    67 type tyco_syntax = Code_Printer.tyco_syntax;
    68 type const_syntax = Code_Printer.const_syntax;
    69 
    70 
    71 (** abstract nonsense **)
    72 
    73 datatype destination = Export of Path.T option | Produce | Present of string list;
    74 type serialization = int -> destination -> (string * (string -> string option)) option;
    75 
    76 fun serialization output _ content width (Export some_path) = (output width some_path content; NONE)
    77   | serialization _ string content width Produce = SOME (string [] width content)
    78   | serialization _ string content width (Present stmt_names) = SOME (string stmt_names width content);
    79 
    80 fun export some_path f = (f (Export some_path); ());
    81 fun produce f = the (f Produce);
    82 fun present stmt_names f = fst (the (f (Present stmt_names)));
    83 
    84 
    85 (** theory data **)
    86 
    87 datatype symbol_syntax_data = Symbol_Syntax_Data of {
    88   class: string Symtab.table,
    89   instance: unit Symreltab.table,
    90   tyco: Code_Printer.tyco_syntax Symtab.table,
    91   const: Code_Printer.const_syntax Symtab.table
    92 };
    93 
    94 fun make_symbol_syntax_data ((class, instance), (tyco, const)) =
    95   Symbol_Syntax_Data { class = class, instance = instance, tyco = tyco, const = const };
    96 fun map_symbol_syntax_data f (Symbol_Syntax_Data { class, instance, tyco, const }) =
    97   make_symbol_syntax_data (f ((class, instance), (tyco, const)));
    98 fun merge_symbol_syntax_data
    99   (Symbol_Syntax_Data { class = class1, instance = instance1, tyco = tyco1, const = const1 },
   100     Symbol_Syntax_Data { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
   101   make_symbol_syntax_data (
   102     (Symtab.join (K snd) (class1, class2),
   103        Symreltab.join (K snd) (instance1, instance2)),
   104     (Symtab.join (K snd) (tyco1, tyco2),
   105        Symtab.join (K snd) (const1, const2))
   106   );
   107 
   108 type serializer = Token.T list (*arguments*) -> {
   109     labelled_name: string -> string,
   110     reserved_syms: string list,
   111     includes: (string * Pretty.T) list,
   112     module_alias: string -> string option,
   113     class_syntax: string -> string option,
   114     tyco_syntax: string -> Code_Printer.tyco_syntax option,
   115     const_syntax: string -> Code_Printer.activated_const_syntax option,
   116     program: Code_Thingol.program,
   117     names: string list }
   118   -> serialization;
   119 
   120 datatype description = Fundamental of { serializer: serializer,
   121       literals: literals,
   122       check: { env_var: string, make_destination: Path.T -> Path.T,
   123         make_command: string -> string -> string } }
   124   | Extension of string *
   125       (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   126 
   127 datatype target = Target of {
   128   serial: serial,
   129   description: description,
   130   reserved: string list,
   131   includes: (Pretty.T * string list) Symtab.table,
   132   module_alias: string Symtab.table,
   133   symbol_syntax: symbol_syntax_data
   134 };
   135 
   136 fun make_target ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))) =
   137   Target { serial = serial, description = description, reserved = reserved, 
   138     includes = includes, module_alias = module_alias, symbol_syntax = symbol_syntax };
   139 fun map_target f ( Target { serial, description, reserved, includes, module_alias, symbol_syntax } ) =
   140   make_target (f ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))));
   141 fun merge_target strict target (Target { serial = serial1, description = description,
   142   reserved = reserved1, includes = includes1,
   143   module_alias = module_alias1, symbol_syntax = symbol_syntax1 },
   144     Target { serial = serial2, description = _,
   145       reserved = reserved2, includes = includes2,
   146       module_alias = module_alias2, symbol_syntax = symbol_syntax2 }) =
   147   if serial1 = serial2 orelse not strict then
   148     make_target ((serial1, description),
   149       ((merge (op =) (reserved1, reserved2), Symtab.join (K snd) (includes1, includes2)),
   150         (Symtab.join (K snd) (module_alias1, module_alias2),
   151           merge_symbol_syntax_data (symbol_syntax1, symbol_syntax2))
   152     ))
   153   else
   154     error ("Incompatible targets: " ^ quote target);
   155 
   156 fun the_description (Target { description, ... }) = description;
   157 fun the_reserved (Target { reserved, ... }) = reserved;
   158 fun the_includes (Target { includes, ... }) = includes;
   159 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   160 fun the_symbol_syntax (Target { symbol_syntax = Symbol_Syntax_Data x, ... }) = x;
   161 
   162 structure Targets = Theory_Data
   163 (
   164   type T = (target Symtab.table * string list) * int;
   165   val empty = ((Symtab.empty, []), 80);
   166   val extend = I;
   167   fun merge (((target1, exc1), width1), ((target2, exc2), width2)) : T =
   168     ((Symtab.join (merge_target true) (target1, target2),
   169       Library.merge (op =) (exc1, exc2)), Int.max (width1, width2));
   170 );
   171 
   172 val abort_allowed = snd o fst o Targets.get;
   173 
   174 fun assert_target thy target = if Symtab.defined ((fst o fst) (Targets.get thy)) target
   175   then target
   176   else error ("Unknown code target language: " ^ quote target);
   177 
   178 fun put_target (target, seri) thy =
   179   let
   180     val lookup_target = Symtab.lookup ((fst o fst) (Targets.get thy));
   181     val _ = case seri
   182      of Extension (super, _) => if is_some (lookup_target super) then ()
   183           else error ("Unknown code target language: " ^ quote super)
   184       | _ => ();
   185     val overwriting = case (Option.map the_description o lookup_target) target
   186      of NONE => false
   187       | SOME (Extension _) => true
   188       | SOME (Fundamental _) => (case seri
   189          of Extension _ => error ("Will not overwrite existing target " ^ quote target)
   190           | _ => true);
   191     val _ = if overwriting
   192       then warning ("Overwriting existing target " ^ quote target)
   193       else (); 
   194   in
   195     thy
   196     |> (Targets.map o apfst o apfst o Symtab.update)
   197           (target, make_target ((serial (), seri), (([], Symtab.empty),
   198             (Symtab.empty, make_symbol_syntax_data ((Symtab.empty, Symreltab.empty),
   199               (Symtab.empty, Symtab.empty))))))
   200   end;
   201 
   202 fun add_target (target, seri) = put_target (target, Fundamental seri);
   203 fun extend_target (target, (super, modify)) =
   204   put_target (target, Extension (super, modify));
   205 
   206 fun map_target_data target f thy =
   207   let
   208     val _ = assert_target thy target;
   209   in
   210     thy
   211     |> (Targets.map o apfst 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_module_alias target =
   219   map_target_data target o apsnd o apsnd o apfst;
   220 fun map_symbol_syntax target =
   221   map_target_data target o apsnd o apsnd o apsnd o map_symbol_syntax_data;
   222 
   223 fun set_default_code_width k = (Targets.map o apsnd) (K k);
   224 
   225 
   226 (** serializer usage **)
   227 
   228 (* montage *)
   229 
   230 fun the_fundamental thy =
   231   let
   232     val ((targets, _), _) = Targets.get thy;
   233     fun fundamental target = case Symtab.lookup targets target
   234      of SOME data => (case the_description data
   235          of Fundamental data => data
   236           | Extension (super, _) => fundamental super)
   237       | NONE => error ("Unknown code target language: " ^ quote target);
   238   in fundamental end;
   239 
   240 fun the_literals thy = #literals o the_fundamental thy;
   241 
   242 local
   243 
   244 fun activate_target_for thy target naming program =
   245   let
   246     val ((targets, abortable), default_width) = Targets.get thy;
   247     fun collapse_hierarchy target =
   248       let
   249         val data = case Symtab.lookup targets target
   250          of SOME data => data
   251           | NONE => error ("Unknown code target language: " ^ quote target);
   252       in case the_description data
   253        of Fundamental _ => (I, data)
   254         | Extension (super, modify) => let
   255             val (modify', data') = collapse_hierarchy super
   256           in (modify' #> modify naming, merge_target false target (data', data)) end
   257       end;
   258     val (modify, data) = collapse_hierarchy target;
   259   in (default_width, abortable, data, modify program) end;
   260 
   261 fun activate_syntax lookup_name src_tab = Symtab.empty
   262   |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   263        of SOME name => (SOME name,
   264             Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   265         | NONE => (NONE, tab)) (Symtab.keys src_tab)
   266   |>> map_filter I;
   267 
   268 fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   269   |> fold_map (fn c => fn (tab, naming) =>
   270       case Code_Thingol.lookup_const naming c
   271        of SOME name => let
   272               val (syn, naming') = Code_Printer.activate_const_syntax thy
   273                 literals c (the (Symtab.lookup src_tab c)) naming
   274             in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   275         | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   276   |>> map_filter I;
   277 
   278 fun activate_symbol_syntax thy literals naming
   279     class_syntax instance_syntax tyco_syntax const_syntax =
   280   let
   281     val (names_class, class_syntax') =
   282       activate_syntax (Code_Thingol.lookup_class naming) class_syntax;
   283     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   284       (Symreltab.keys instance_syntax);
   285     val (names_tyco, tyco_syntax') =
   286       activate_syntax (Code_Thingol.lookup_tyco naming) tyco_syntax;
   287     val (names_const, (const_syntax', _)) =
   288       activate_const_syntax thy literals const_syntax naming;
   289   in
   290     (names_class @ names_inst @ names_tyco @ names_const,
   291       (class_syntax', tyco_syntax', const_syntax'))
   292   end;
   293 
   294 fun project_program thy abortable names_hidden names1 program2 =
   295   let
   296     val names2 = subtract (op =) names_hidden names1;
   297     val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   298     val names4 = Graph.all_succs program3 names2;
   299     val empty_funs = filter_out (member (op =) abortable)
   300       (Code_Thingol.empty_funs program3);
   301     val _ = if null empty_funs then () else error ("No code equations for "
   302       ^ commas (map (Sign.extern_const thy) empty_funs));
   303     val program4 = Graph.subgraph (member (op =) names4) program3;
   304   in (names4, program4) end;
   305 
   306 fun invoke_serializer thy abortable serializer literals reserved abs_includes 
   307     module_alias proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax
   308     module_name args naming proto_program names =
   309   let
   310     val (names_hidden, (class_syntax, tyco_syntax, const_syntax)) =
   311       activate_symbol_syntax thy literals naming
   312         proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax;
   313     val (names_all, program) = project_program thy abortable names_hidden names proto_program;
   314     val includes = abs_includes names_all;
   315   in
   316     serializer args {
   317       labelled_name = Code_Thingol.labelled_name thy proto_program,
   318       reserved_syms = reserved,
   319       includes = includes,
   320       module_alias = if module_name = "" then Symtab.lookup module_alias else K (SOME module_name),
   321       class_syntax = Symtab.lookup class_syntax,
   322       tyco_syntax = Symtab.lookup tyco_syntax,
   323       const_syntax = Symtab.lookup const_syntax,
   324       program = program,
   325       names = names }
   326   end;
   327 
   328 fun mount_serializer thy target some_width module_name args naming proto_program names =
   329   let
   330     val (default_width, abortable, data, program) =
   331       activate_target_for thy target naming proto_program;
   332     val serializer = case the_description data
   333      of Fundamental seri => #serializer seri;
   334     val reserved = the_reserved data;
   335     fun select_include names_all (name, (content, cs)) =
   336       if null cs then SOME (name, content)
   337       else if exists (fn c => case Code_Thingol.lookup_const naming c
   338        of SOME name => member (op =) names_all name
   339         | NONE => false) cs
   340       then SOME (name, content) else NONE;
   341     fun includes names_all = map_filter (select_include names_all)
   342       ((Symtab.dest o the_includes) data);
   343     val module_alias = the_module_alias data 
   344     val { class, instance, tyco, const } = the_symbol_syntax data;
   345     val literals = the_literals thy target;
   346     val width = the_default default_width some_width;
   347   in
   348     invoke_serializer thy abortable serializer literals reserved
   349       includes module_alias class instance tyco const module_name args
   350         naming program names width
   351   end;
   352 
   353 fun assert_module_name "" = error ("Empty module name not allowed.")
   354   | assert_module_name module_name = module_name;
   355 
   356 in
   357 
   358 fun export_code_for thy some_path target some_width some_module_name args naming program names =
   359   export some_path (mount_serializer thy target some_width some_module_name args naming program names);
   360 
   361 fun produce_code_for thy target some_width module_name args naming program names =
   362   let
   363     val (s, deresolve) = produce (mount_serializer thy target some_width (assert_module_name module_name) args naming program names)
   364   in (s, map deresolve names) end;
   365 
   366 fun present_code_for thy target some_width module_name args naming program (names, selects) =
   367   present selects (mount_serializer thy target some_width (assert_module_name module_name) args naming program names);
   368 
   369 fun check_code_for thy target strict args naming program names_cs =
   370   let
   371     val module_name = "Code";
   372     val { env_var, make_destination, make_command } =
   373       (#check o the_fundamental thy) target;
   374     val env_param = getenv env_var;
   375     fun ext_check env_param p =
   376       let 
   377         val destination = make_destination p;
   378         val _ = export (SOME destination) (mount_serializer thy target (SOME 80)
   379           module_name args naming program names_cs);
   380         val cmd = make_command env_param module_name;
   381       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   382         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   383         else ()
   384       end;
   385   in if env_param = ""
   386     then if strict
   387       then error (env_var ^ " not set; cannot check code for " ^ target)
   388       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   389     else Cache_IO.with_tmp_dir "Code_Test" (ext_check env_param)
   390   end;
   391 
   392 end; (* local *)
   393 
   394 
   395 (* code generation *)
   396 
   397 fun transitivly_non_empty_funs thy naming program =
   398   let
   399     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   400     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   401   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   402 
   403 fun read_const_exprs thy cs =
   404   let
   405     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   406     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   407     val names3 = transitivly_non_empty_funs thy naming program;
   408     val cs3 = map_filter (fn (c, name) =>
   409       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   410   in union (op =) cs3 cs1 end;
   411 
   412 fun prep_destination "" = NONE
   413   | prep_destination "-" = NONE
   414   | prep_destination s = SOME (Path.explode s);
   415 
   416 fun export_code thy cs seris =
   417   let
   418     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   419     val _ = map (fn (((target, module_name), some_path), args) =>
   420       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   421   in () end;
   422 
   423 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   424   ((map o apfst o apsnd) prep_destination seris);
   425 
   426 fun produce_code thy cs target some_width some_module_name args =
   427   let
   428     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   429   in produce_code_for thy target some_width some_module_name args naming program names_cs end;
   430 
   431 fun present_code thy cs names_stmt target some_width some_module_name args =
   432   let
   433     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   434   in present_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   435 
   436 fun check_code thy cs seris =
   437   let
   438     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   439     val _ = map (fn ((target, strict), args) =>
   440       check_code_for thy target strict args naming program names_cs) seris;
   441   in () end;
   442 
   443 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   444 
   445 
   446 (** serializer configuration **)
   447 
   448 (* data access *)
   449 
   450 fun cert_class thy class =
   451   let
   452     val _ = AxClass.get_info thy class;
   453   in class end;
   454 
   455 fun read_class thy = cert_class thy o Sign.intern_class thy;
   456 
   457 fun cert_tyco thy tyco =
   458   let
   459     val _ = if Sign.declared_tyname thy tyco then ()
   460       else error ("No such type constructor: " ^ quote tyco);
   461   in tyco end;
   462 
   463 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   464 
   465 fun cert_inst thy (class, tyco) =
   466   (cert_class thy class, cert_tyco thy tyco);
   467 
   468 fun read_inst thy (raw_tyco, raw_class) =
   469   (read_class thy raw_class, read_tyco thy raw_tyco);
   470 
   471 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   472   let
   473     val x = prep_x thy raw_x;
   474     val change = case some_raw_syn
   475      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   476       | NONE => del x;
   477   in (map_symbol_syntax target o mapp) change thy end;
   478 
   479 fun gen_add_class_syntax prep_class =
   480   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   481 
   482 fun gen_add_instance_syntax prep_inst =
   483   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   484 
   485 fun gen_add_tyco_syntax prep_tyco =
   486   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   487     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   488       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   489       else syn);
   490 
   491 fun gen_add_const_syntax prep_const =
   492   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   493     (fn thy => fn c => fn syn =>
   494       if Code_Printer.requires_args syn > Code.args_number thy c
   495       then error ("Too many arguments in syntax for constant " ^ quote c)
   496       else syn);
   497 
   498 fun add_reserved target =
   499   let
   500     fun add sym syms = if member (op =) syms sym
   501       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   502       else insert (op =) sym syms
   503   in map_reserved target o add end;
   504 
   505 fun gen_add_include read_const target args thy =
   506   let
   507     fun add (name, SOME (content, raw_cs)) incls =
   508           let
   509             val _ = if Symtab.defined incls name
   510               then warning ("Overwriting existing include " ^ name)
   511               else ();
   512             val cs = map (read_const thy) raw_cs;
   513           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   514       | add (name, NONE) incls = Symtab.delete name incls;
   515   in map_includes target (add args) thy end;
   516 
   517 val add_include = gen_add_include (K I);
   518 val add_include_cmd = gen_add_include Code.read_const;
   519 
   520 fun add_module_alias target (thyname, "") =
   521       map_module_alias target (Symtab.delete thyname)
   522   | add_module_alias target (thyname, modlname) =
   523       let
   524         val xs = Long_Name.explode modlname;
   525         val xs' = map (Name.desymbolize true) xs;
   526       in if xs' = xs
   527         then map_module_alias target (Symtab.update (thyname, modlname))
   528         else error ("Invalid module name: " ^ quote modlname ^ "\n"
   529           ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   530       end;
   531 
   532 fun gen_allow_abort prep_const raw_c thy =
   533   let
   534     val c = prep_const thy raw_c;
   535   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   536 
   537 
   538 (* concrete syntax *)
   539 
   540 local
   541 
   542 fun zip_list (x::xs) f g =
   543   f
   544   :|-- (fn y =>
   545     fold_map (fn x => g |-- f >> pair x) xs
   546     :|-- (fn xys => pair ((x, y) :: xys)));
   547 
   548 fun process_multi_syntax parse_thing parse_syntax change =
   549   (Parse.and_list1 parse_thing
   550   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   551         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   552   >> (Toplevel.theory oo fold)
   553     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   554 
   555 in
   556 
   557 val add_class_syntax = gen_add_class_syntax cert_class;
   558 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   559 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   560 val add_const_syntax = gen_add_const_syntax (K I);
   561 val allow_abort = gen_allow_abort (K I);
   562 val add_reserved = add_reserved;
   563 val add_include = add_include;
   564 
   565 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   566 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   567 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   568 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   569 val allow_abort_cmd = gen_allow_abort Code.read_const;
   570 
   571 fun parse_args f args =
   572   case Scan.read Token.stopper f args
   573    of SOME x => x
   574     | NONE => error "Bad serializer arguments";
   575 
   576 
   577 (** Isar setup **)
   578 
   579 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   580 
   581 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   582 
   583 val code_exprP =
   584   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   585     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   586       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   587       >> (fn seris => check_code_cmd raw_cs seris)
   588     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   589        -- Scan.optional (Parse.$$$ module_nameK |-- Parse.name) ""
   590        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   591        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   592 
   593 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   594 
   595 val _ =
   596   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   597     process_multi_syntax Parse.xname (Scan.option Parse.string)
   598     add_class_syntax_cmd);
   599 
   600 val _ =
   601   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   602     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   603       (Scan.option (Parse.minus >> K ()))
   604     add_instance_syntax_cmd);
   605 
   606 val _ =
   607   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   608     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   609     add_tyco_syntax_cmd);
   610 
   611 val _ =
   612   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   613     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   614     add_const_syntax_cmd);
   615 
   616 val _ =
   617   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   618     Keyword.thy_decl (
   619     Parse.name -- Scan.repeat1 Parse.name
   620     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   621   );
   622 
   623 val _ =
   624   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   625     Keyword.thy_decl (
   626     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   627       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   628     >> (fn ((target, name), content_consts) =>
   629         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   630   );
   631 
   632 val _ =
   633   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   634     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   635     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   636   );
   637 
   638 val _ =
   639   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   640     Keyword.thy_decl (
   641     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   642   );
   643 
   644 val _ =
   645   Outer_Syntax.command "export_code" "generate executable code for constants"
   646     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   647 
   648 fun shell_command thyname cmd = Toplevel.program (fn _ =>
   649   (use_thy thyname; case Scan.read Token.stopper (Parse.!!! code_exprP)
   650     ((filter Token.is_proper o Outer_Syntax.scan Position.none) cmd)
   651    of SOME f => (writeln "Now generating code..."; f (Thy_Info.get_theory thyname))
   652     | NONE => error ("Bad directive " ^ quote cmd)))
   653   handle Runtime.TOPLEVEL_ERROR => OS.Process.exit OS.Process.failure;
   654 
   655 end; (*local*)
   656 
   657 end; (*struct*)