src/Tools/Code/code_target.ML
changeset 31775 2b04504fcb69
parent 31599 97b4d289c646
child 31957 a9742afd403e
     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/Tools/Code/code_target.ML	Tue Jun 23 12:09:30 2009 +0200
     1.3 @@ -0,0 +1,629 @@
     1.4 +(*  Title:      Tools/code/code_target.ML
     1.5 +    Author:     Florian Haftmann, TU Muenchen
     1.6 +
     1.7 +Serializer from intermediate language ("Thin-gol") to target languages.
     1.8 +*)
     1.9 +
    1.10 +signature CODE_TARGET =
    1.11 +sig
    1.12 +  include CODE_PRINTER
    1.13 +
    1.14 +  type serializer
    1.15 +  val add_target: string * (serializer * literals) -> theory -> theory
    1.16 +  val extend_target: string *
    1.17 +      (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    1.18 +    -> theory -> theory
    1.19 +  val assert_target: theory -> string -> string
    1.20 +
    1.21 +  type destination
    1.22 +  type serialization
    1.23 +  val parse_args: (OuterLex.token list -> 'a * OuterLex.token list)
    1.24 +    -> OuterLex.token list -> 'a
    1.25 +  val stmt_names_of_destination: destination -> string list
    1.26 +  val code_of_pretty: Pretty.T -> string
    1.27 +  val code_writeln: Pretty.T -> unit
    1.28 +  val mk_serialization: string -> ('a -> unit) option
    1.29 +    -> (Path.T option -> 'a -> unit)
    1.30 +    -> ('a -> string * string option list)
    1.31 +    -> 'a -> serialization
    1.32 +  val serialize: theory -> string -> string option -> OuterLex.token list
    1.33 +    -> Code_Thingol.naming -> Code_Thingol.program -> string list -> serialization
    1.34 +  val serialize_custom: theory -> string * (serializer * literals)
    1.35 +    -> Code_Thingol.naming -> Code_Thingol.program -> string list -> string * string option list
    1.36 +  val the_literals: theory -> string -> literals
    1.37 +  val compile: serialization -> unit
    1.38 +  val export: serialization -> unit
    1.39 +  val file: Path.T -> serialization -> unit
    1.40 +  val string: string list -> serialization -> string
    1.41 +  val code_of: theory -> string -> string
    1.42 +    -> string list -> (Code_Thingol.naming -> string list) -> string
    1.43 +  val shell_command: string (*theory name*) -> string (*export_code expr*) -> unit
    1.44 +  val code_width: int ref
    1.45 +
    1.46 +  val allow_abort: string -> theory -> theory
    1.47 +  val add_syntax_class: string -> class -> string option -> theory -> theory
    1.48 +  val add_syntax_inst: string -> string * class -> bool -> theory -> theory
    1.49 +  val add_syntax_tyco: string -> string -> tyco_syntax option -> theory -> theory
    1.50 +  val add_syntax_const: string -> string -> proto_const_syntax option -> theory -> theory
    1.51 +  val add_reserved: string -> string -> theory -> theory
    1.52 +end;
    1.53 +
    1.54 +structure Code_Target : CODE_TARGET =
    1.55 +struct
    1.56 +
    1.57 +open Basic_Code_Thingol;
    1.58 +open Code_Printer;
    1.59 +
    1.60 +(** basics **)
    1.61 +
    1.62 +datatype destination = Compile | Export | File of Path.T | String of string list;
    1.63 +type serialization = destination -> (string * string option list) option;
    1.64 +
    1.65 +val code_width = ref 80; (*FIXME after Pretty module no longer depends on print mode*)
    1.66 +fun code_setmp f = PrintMode.setmp [] (Pretty.setmp_margin (!code_width) f);
    1.67 +fun code_of_pretty p = code_setmp Pretty.string_of p ^ "\n";
    1.68 +fun code_writeln p = Pretty.setmp_margin (!code_width) Pretty.writeln p;
    1.69 +
    1.70 +(*FIXME why another code_setmp?*)
    1.71 +fun compile f = (code_setmp f Compile; ());
    1.72 +fun export f = (code_setmp f Export; ());
    1.73 +fun file p f = (code_setmp f (File p); ());
    1.74 +fun string stmts f = fst (the (code_setmp f (String stmts)));
    1.75 +
    1.76 +fun stmt_names_of_destination (String stmts) = stmts
    1.77 +  | stmt_names_of_destination _ = [];
    1.78 +
    1.79 +fun mk_serialization target (SOME comp) _ _ code Compile = (comp code; NONE)
    1.80 +  | mk_serialization target NONE _ _ _ Compile = error (target ^ ": no internal compilation")
    1.81 +  | mk_serialization target _ output _ code Export = (output NONE code ; NONE)
    1.82 +  | mk_serialization target _ output _ code (File file) = (output (SOME file) code; NONE)
    1.83 +  | mk_serialization target _ _ string code (String _) = SOME (string code);
    1.84 +
    1.85 +
    1.86 +(** theory data **)
    1.87 +
    1.88 +datatype name_syntax_table = NameSyntaxTable of {
    1.89 +  class: string Symtab.table,
    1.90 +  instance: unit Symreltab.table,
    1.91 +  tyco: tyco_syntax Symtab.table,
    1.92 +  const: proto_const_syntax Symtab.table
    1.93 +};
    1.94 +
    1.95 +fun mk_name_syntax_table ((class, instance), (tyco, const)) =
    1.96 +  NameSyntaxTable { class = class, instance = instance, tyco = tyco, const = const };
    1.97 +fun map_name_syntax_table f (NameSyntaxTable { class, instance, tyco, const }) =
    1.98 +  mk_name_syntax_table (f ((class, instance), (tyco, const)));
    1.99 +fun merge_name_syntax_table (NameSyntaxTable { class = class1, instance = instance1, tyco = tyco1, const = const1 },
   1.100 +    NameSyntaxTable { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
   1.101 +  mk_name_syntax_table (
   1.102 +    (Symtab.join (K snd) (class1, class2),
   1.103 +       Symreltab.join (K snd) (instance1, instance2)),
   1.104 +    (Symtab.join (K snd) (tyco1, tyco2),
   1.105 +       Symtab.join (K snd) (const1, const2))
   1.106 +  );
   1.107 +
   1.108 +type serializer =
   1.109 +  string option                         (*module name*)
   1.110 +  -> OuterLex.token list                (*arguments*)
   1.111 +  -> (string -> string)                 (*labelled_name*)
   1.112 +  -> string list                        (*reserved symbols*)
   1.113 +  -> (string * Pretty.T) list           (*includes*)
   1.114 +  -> (string -> string option)          (*module aliasses*)
   1.115 +  -> (string -> string option)          (*class syntax*)
   1.116 +  -> (string -> tyco_syntax option)
   1.117 +  -> (string -> const_syntax option)
   1.118 +  -> Code_Thingol.program
   1.119 +  -> string list                        (*selected statements*)
   1.120 +  -> serialization;
   1.121 +
   1.122 +datatype serializer_entry = Serializer of serializer * literals
   1.123 +  | Extends of string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   1.124 +
   1.125 +datatype target = Target of {
   1.126 +  serial: serial,
   1.127 +  serializer: serializer_entry,
   1.128 +  reserved: string list,
   1.129 +  includes: (Pretty.T * string list) Symtab.table,
   1.130 +  name_syntax_table: name_syntax_table,
   1.131 +  module_alias: string Symtab.table
   1.132 +};
   1.133 +
   1.134 +fun make_target ((serial, serializer), ((reserved, includes), (name_syntax_table, module_alias))) =
   1.135 +  Target { serial = serial, serializer = serializer, reserved = reserved, 
   1.136 +    includes = includes, name_syntax_table = name_syntax_table, module_alias = module_alias };
   1.137 +fun map_target f ( Target { serial, serializer, reserved, includes, name_syntax_table, module_alias } ) =
   1.138 +  make_target (f ((serial, serializer), ((reserved, includes), (name_syntax_table, module_alias))));
   1.139 +fun merge_target strict target (Target { serial = serial1, serializer = serializer,
   1.140 +  reserved = reserved1, includes = includes1,
   1.141 +  name_syntax_table = name_syntax_table1, module_alias = module_alias1 },
   1.142 +    Target { serial = serial2, serializer = _,
   1.143 +      reserved = reserved2, includes = includes2,
   1.144 +      name_syntax_table = name_syntax_table2, module_alias = module_alias2 }) =
   1.145 +  if serial1 = serial2 orelse not strict then
   1.146 +    make_target ((serial1, serializer),
   1.147 +      ((merge (op =) (reserved1, reserved2), Symtab.merge (op =) (includes1, includes2)),
   1.148 +        (merge_name_syntax_table (name_syntax_table1, name_syntax_table2),
   1.149 +          Symtab.join (K snd) (module_alias1, module_alias2))
   1.150 +    ))
   1.151 +  else
   1.152 +    error ("Incompatible serializers: " ^ quote target);
   1.153 +
   1.154 +structure CodeTargetData = TheoryDataFun
   1.155 +(
   1.156 +  type T = target Symtab.table * string list;
   1.157 +  val empty = (Symtab.empty, []);
   1.158 +  val copy = I;
   1.159 +  val extend = I;
   1.160 +  fun merge _ ((target1, exc1) : T, (target2, exc2)) =
   1.161 +    (Symtab.join (merge_target true) (target1, target2), Library.merge (op =) (exc1, exc2));
   1.162 +);
   1.163 +
   1.164 +fun the_serializer (Target { serializer, ... }) = serializer;
   1.165 +fun the_reserved (Target { reserved, ... }) = reserved;
   1.166 +fun the_includes (Target { includes, ... }) = includes;
   1.167 +fun the_name_syntax (Target { name_syntax_table = NameSyntaxTable x, ... }) = x;
   1.168 +fun the_module_alias (Target { module_alias , ... }) = module_alias;
   1.169 +
   1.170 +val abort_allowed = snd o CodeTargetData.get;
   1.171 +
   1.172 +fun assert_target thy target =
   1.173 +  case Symtab.lookup (fst (CodeTargetData.get thy)) target
   1.174 +   of SOME data => target
   1.175 +    | NONE => error ("Unknown code target language: " ^ quote target);
   1.176 +
   1.177 +fun put_target (target, seri) thy =
   1.178 +  let
   1.179 +    val lookup_target = Symtab.lookup (fst (CodeTargetData.get thy));
   1.180 +    val _ = case seri
   1.181 +     of Extends (super, _) => if is_some (lookup_target super) then ()
   1.182 +          else error ("Unknown code target language: " ^ quote super)
   1.183 +      | _ => ();
   1.184 +    val overwriting = case (Option.map the_serializer o lookup_target) target
   1.185 +     of NONE => false
   1.186 +      | SOME (Extends _) => true
   1.187 +      | SOME (Serializer _) => (case seri
   1.188 +         of Extends _ => error ("Will not overwrite existing target " ^ quote target)
   1.189 +          | _ => true);
   1.190 +    val _ = if overwriting
   1.191 +      then warning ("Overwriting existing target " ^ quote target)
   1.192 +      else (); 
   1.193 +  in
   1.194 +    thy
   1.195 +    |> (CodeTargetData.map o apfst oo Symtab.map_default)
   1.196 +          (target, make_target ((serial (), seri), (([], Symtab.empty),
   1.197 +            (mk_name_syntax_table ((Symtab.empty, Symreltab.empty), (Symtab.empty, Symtab.empty)),
   1.198 +              Symtab.empty))))
   1.199 +          ((map_target o apfst o apsnd o K) seri)
   1.200 +  end;
   1.201 +
   1.202 +fun add_target (target, seri) = put_target (target, Serializer seri);
   1.203 +fun extend_target (target, (super, modify)) =
   1.204 +  put_target (target, Extends (super, modify));
   1.205 +
   1.206 +fun map_target_data target f thy =
   1.207 +  let
   1.208 +    val _ = assert_target thy target;
   1.209 +  in
   1.210 +    thy
   1.211 +    |> (CodeTargetData.map o apfst o Symtab.map_entry target o map_target) f
   1.212 +  end;
   1.213 +
   1.214 +fun map_reserved target =
   1.215 +  map_target_data target o apsnd o apfst o apfst;
   1.216 +fun map_includes target =
   1.217 +  map_target_data target o apsnd o apfst o apsnd;
   1.218 +fun map_name_syntax target =
   1.219 +  map_target_data target o apsnd o apsnd o apfst o map_name_syntax_table;
   1.220 +fun map_module_alias target =
   1.221 +  map_target_data target o apsnd o apsnd o apsnd;
   1.222 +
   1.223 +
   1.224 +(** serializer configuration **)
   1.225 +
   1.226 +(* data access *)
   1.227 +
   1.228 +local
   1.229 +
   1.230 +fun cert_class thy class =
   1.231 +  let
   1.232 +    val _ = AxClass.get_info thy class;
   1.233 +  in class end;
   1.234 +
   1.235 +fun read_class thy = cert_class thy o Sign.intern_class thy;
   1.236 +
   1.237 +fun cert_tyco thy tyco =
   1.238 +  let
   1.239 +    val _ = if Sign.declared_tyname thy tyco then ()
   1.240 +      else error ("No such type constructor: " ^ quote tyco);
   1.241 +  in tyco end;
   1.242 +
   1.243 +fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   1.244 +
   1.245 +fun gen_add_syntax_class prep_class prep_const target raw_class raw_syn thy =
   1.246 +  let
   1.247 +    val class = prep_class thy raw_class;
   1.248 +  in case raw_syn
   1.249 +   of SOME syntax =>
   1.250 +      thy
   1.251 +      |> (map_name_syntax target o apfst o apfst)
   1.252 +           (Symtab.update (class, syntax))
   1.253 +    | NONE =>
   1.254 +      thy
   1.255 +      |> (map_name_syntax target o apfst o apfst)
   1.256 +           (Symtab.delete_safe class)
   1.257 +  end;
   1.258 +
   1.259 +fun gen_add_syntax_inst prep_class prep_tyco target (raw_tyco, raw_class) add_del thy =
   1.260 +  let
   1.261 +    val inst = (prep_class thy raw_class, prep_tyco thy raw_tyco);
   1.262 +  in if add_del then
   1.263 +    thy
   1.264 +    |> (map_name_syntax target o apfst o apsnd)
   1.265 +        (Symreltab.update (inst, ()))
   1.266 +  else
   1.267 +    thy
   1.268 +    |> (map_name_syntax target o apfst o apsnd)
   1.269 +        (Symreltab.delete_safe inst)
   1.270 +  end;
   1.271 +
   1.272 +fun gen_add_syntax_tyco prep_tyco target raw_tyco raw_syn thy =
   1.273 +  let
   1.274 +    val tyco = prep_tyco thy raw_tyco;
   1.275 +    fun check_args (syntax as (n, _)) = if n <> Sign.arity_number thy tyco
   1.276 +      then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   1.277 +      else syntax
   1.278 +  in case raw_syn
   1.279 +   of SOME syntax =>
   1.280 +      thy
   1.281 +      |> (map_name_syntax target o apsnd o apfst)
   1.282 +           (Symtab.update (tyco, check_args syntax))
   1.283 +    | NONE =>
   1.284 +      thy
   1.285 +      |> (map_name_syntax target o apsnd o apfst)
   1.286 +           (Symtab.delete_safe tyco)
   1.287 +  end;
   1.288 +
   1.289 +fun gen_add_syntax_const prep_const target raw_c raw_syn thy =
   1.290 +  let
   1.291 +    val c = prep_const thy raw_c;
   1.292 +    fun check_args (syntax as (n, _)) = if n > Code.no_args thy c
   1.293 +      then error ("Too many arguments in syntax for constant " ^ quote c)
   1.294 +      else syntax;
   1.295 +  in case raw_syn
   1.296 +   of SOME syntax =>
   1.297 +      thy
   1.298 +      |> (map_name_syntax target o apsnd o apsnd)
   1.299 +           (Symtab.update (c, check_args syntax))
   1.300 +    | NONE =>
   1.301 +      thy
   1.302 +      |> (map_name_syntax target o apsnd o apsnd)
   1.303 +           (Symtab.delete_safe c)
   1.304 +  end;
   1.305 +
   1.306 +fun add_reserved target =
   1.307 +  let
   1.308 +    fun add sym syms = if member (op =) syms sym
   1.309 +      then error ("Reserved symbol " ^ quote sym ^ " already declared")
   1.310 +      else insert (op =) sym syms
   1.311 +  in map_reserved target o add end;
   1.312 +
   1.313 +fun gen_add_include read_const target args thy =
   1.314 +  let
   1.315 +    fun add (name, SOME (content, raw_cs)) incls =
   1.316 +          let
   1.317 +            val _ = if Symtab.defined incls name
   1.318 +              then warning ("Overwriting existing include " ^ name)
   1.319 +              else ();
   1.320 +            val cs = map (read_const thy) raw_cs;
   1.321 +          in Symtab.update (name, (str content, cs)) incls end
   1.322 +      | add (name, NONE) incls = Symtab.delete name incls;
   1.323 +  in map_includes target (add args) thy end;
   1.324 +
   1.325 +val add_include = gen_add_include Code.check_const;
   1.326 +val add_include_cmd = gen_add_include Code.read_const;
   1.327 +
   1.328 +fun add_module_alias target (thyname, modlname) =
   1.329 +  let
   1.330 +    val xs = Long_Name.explode modlname;
   1.331 +    val xs' = map (Name.desymbolize true) xs;
   1.332 +  in if xs' = xs
   1.333 +    then map_module_alias target (Symtab.update (thyname, modlname))
   1.334 +    else error ("Invalid module name: " ^ quote modlname ^ "\n"
   1.335 +      ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   1.336 +  end;
   1.337 +
   1.338 +fun gen_allow_abort prep_const raw_c thy =
   1.339 +  let
   1.340 +    val c = prep_const thy raw_c;
   1.341 +  in thy |> (CodeTargetData.map o apsnd) (insert (op =) c) end;
   1.342 +
   1.343 +fun zip_list (x::xs) f g =
   1.344 +  f
   1.345 +  #-> (fn y =>
   1.346 +    fold_map (fn x => g |-- f >> pair x) xs
   1.347 +    #-> (fn xys => pair ((x, y) :: xys)));
   1.348 +
   1.349 +
   1.350 +(* concrete syntax *)
   1.351 +
   1.352 +structure P = OuterParse
   1.353 +and K = OuterKeyword
   1.354 +
   1.355 +fun parse_multi_syntax parse_thing parse_syntax =
   1.356 +  P.and_list1 parse_thing
   1.357 +  #-> (fn things => Scan.repeat1 (P.$$$ "(" |-- P.name --
   1.358 +        (zip_list things parse_syntax (P.$$$ "and")) --| P.$$$ ")"));
   1.359 +
   1.360 +in
   1.361 +
   1.362 +val add_syntax_class = gen_add_syntax_class cert_class (K I);
   1.363 +val add_syntax_inst = gen_add_syntax_inst cert_class cert_tyco;
   1.364 +val add_syntax_tyco = gen_add_syntax_tyco cert_tyco;
   1.365 +val add_syntax_const = gen_add_syntax_const (K I);
   1.366 +val allow_abort = gen_allow_abort (K I);
   1.367 +val add_reserved = add_reserved;
   1.368 +
   1.369 +val add_syntax_class_cmd = gen_add_syntax_class read_class Code.read_const;
   1.370 +val add_syntax_inst_cmd = gen_add_syntax_inst read_class read_tyco;
   1.371 +val add_syntax_tyco_cmd = gen_add_syntax_tyco read_tyco;
   1.372 +val add_syntax_const_cmd = gen_add_syntax_const Code.read_const;
   1.373 +val allow_abort_cmd = gen_allow_abort Code.read_const;
   1.374 +
   1.375 +fun the_literals thy =
   1.376 +  let
   1.377 +    val (targets, _) = CodeTargetData.get thy;
   1.378 +    fun literals target = case Symtab.lookup targets target
   1.379 +     of SOME data => (case the_serializer data
   1.380 +         of Serializer (_, literals) => literals
   1.381 +          | Extends (super, _) => literals super)
   1.382 +      | NONE => error ("Unknown code target language: " ^ quote target);
   1.383 +  in literals end;
   1.384 +
   1.385 +
   1.386 +(** serializer usage **)
   1.387 +
   1.388 +(* montage *)
   1.389 +
   1.390 +local
   1.391 +
   1.392 +fun labelled_name thy program name = case Graph.get_node program name
   1.393 + of Code_Thingol.Fun (c, _) => quote (Code.string_of_const thy c)
   1.394 +  | Code_Thingol.Datatype (tyco, _) => "type " ^ quote (Sign.extern_type thy tyco)
   1.395 +  | Code_Thingol.Datatypecons (c, _) => quote (Code.string_of_const thy c)
   1.396 +  | Code_Thingol.Class (class, _) => "class " ^ quote (Sign.extern_class thy class)
   1.397 +  | Code_Thingol.Classrel (sub, super) => let
   1.398 +        val Code_Thingol.Class (sub, _) = Graph.get_node program sub
   1.399 +        val Code_Thingol.Class (super, _) = Graph.get_node program super
   1.400 +      in quote (Sign.extern_class thy sub ^ " < " ^ Sign.extern_class thy super) end
   1.401 +  | Code_Thingol.Classparam (c, _) => quote (Code.string_of_const thy c)
   1.402 +  | Code_Thingol.Classinst ((class, (tyco, _)), _) => let
   1.403 +        val Code_Thingol.Class (class, _) = Graph.get_node program class
   1.404 +        val Code_Thingol.Datatype (tyco, _) = Graph.get_node program tyco
   1.405 +      in quote (Sign.extern_type thy tyco ^ " :: " ^ Sign.extern_class thy class) end
   1.406 +
   1.407 +fun activate_syntax lookup_name src_tab = Symtab.empty
   1.408 +  |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   1.409 +       of SOME name => (SOME name,
   1.410 +            Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   1.411 +        | NONE => (NONE, tab)) (Symtab.keys src_tab)
   1.412 +  |>> map_filter I;
   1.413 +
   1.414 +fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   1.415 +  |> fold_map (fn thing_identifier => fn (tab, naming) =>
   1.416 +      case Code_Thingol.lookup_const naming thing_identifier
   1.417 +       of SOME name => let
   1.418 +              val (syn, naming') = Code_Printer.activate_const_syntax thy
   1.419 +                literals (the (Symtab.lookup src_tab thing_identifier)) naming
   1.420 +            in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   1.421 +        | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   1.422 +  |>> map_filter I;
   1.423 +
   1.424 +fun invoke_serializer thy abortable serializer literals reserved abs_includes 
   1.425 +    module_alias class instance tyco const module args naming program2 names1 =
   1.426 +  let
   1.427 +    val (names_class, class') =
   1.428 +      activate_syntax (Code_Thingol.lookup_class naming) class;
   1.429 +    val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   1.430 +      (Symreltab.keys instance);
   1.431 +    val (names_tyco, tyco') =
   1.432 +      activate_syntax (Code_Thingol.lookup_tyco naming) tyco;
   1.433 +    val (names_const, (const', _)) =
   1.434 +      activate_const_syntax thy literals const naming;
   1.435 +    val names_hidden = names_class @ names_inst @ names_tyco @ names_const;
   1.436 +    val names2 = subtract (op =) names_hidden names1;
   1.437 +    val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   1.438 +    val names_all = Graph.all_succs program3 names2;
   1.439 +    val includes = abs_includes names_all;
   1.440 +    val program4 = Graph.subgraph (member (op =) names_all) program3;
   1.441 +    val empty_funs = filter_out (member (op =) abortable)
   1.442 +      (Code_Thingol.empty_funs program3);
   1.443 +    val _ = if null empty_funs then () else error ("No code equations for "
   1.444 +      ^ commas (map (Sign.extern_const thy) empty_funs));
   1.445 +  in
   1.446 +    serializer module args (labelled_name thy program2) reserved includes
   1.447 +      (Symtab.lookup module_alias) (Symtab.lookup class')
   1.448 +      (Symtab.lookup tyco') (Symtab.lookup const')
   1.449 +      program4 names2
   1.450 +  end;
   1.451 +
   1.452 +fun mount_serializer thy alt_serializer target module args naming program names =
   1.453 +  let
   1.454 +    val (targets, abortable) = CodeTargetData.get thy;
   1.455 +    fun collapse_hierarchy target =
   1.456 +      let
   1.457 +        val data = case Symtab.lookup targets target
   1.458 +         of SOME data => data
   1.459 +          | NONE => error ("Unknown code target language: " ^ quote target);
   1.460 +      in case the_serializer data
   1.461 +       of Serializer _ => (I, data)
   1.462 +        | Extends (super, modify) => let
   1.463 +            val (modify', data') = collapse_hierarchy super
   1.464 +          in (modify' #> modify naming, merge_target false target (data', data)) end
   1.465 +      end;
   1.466 +    val (modify, data) = collapse_hierarchy target;
   1.467 +    val (serializer, _) = the_default (case the_serializer data
   1.468 +     of Serializer seri => seri) alt_serializer;
   1.469 +    val reserved = the_reserved data;
   1.470 +    fun select_include names_all (name, (content, cs)) =
   1.471 +      if null cs then SOME (name, content)
   1.472 +      else if exists (fn c => case Code_Thingol.lookup_const naming c
   1.473 +       of SOME name => member (op =) names_all name
   1.474 +        | NONE => false) cs
   1.475 +      then SOME (name, content) else NONE;
   1.476 +    fun includes names_all = map_filter (select_include names_all)
   1.477 +      ((Symtab.dest o the_includes) data);
   1.478 +    val module_alias = the_module_alias data;
   1.479 +    val { class, instance, tyco, const } = the_name_syntax data;
   1.480 +    val literals = the_literals thy target;
   1.481 +  in
   1.482 +    invoke_serializer thy abortable serializer literals reserved
   1.483 +      includes module_alias class instance tyco const module args naming (modify program) names
   1.484 +  end;
   1.485 +
   1.486 +in
   1.487 +
   1.488 +fun serialize thy = mount_serializer thy NONE;
   1.489 +
   1.490 +fun serialize_custom thy (target_name, seri) naming program names =
   1.491 +  mount_serializer thy (SOME seri) target_name NONE [] naming program names (String [])
   1.492 +  |> the;
   1.493 +
   1.494 +end; (* local *)
   1.495 +
   1.496 +fun parse_args f args =
   1.497 +  case Scan.read OuterLex.stopper f args
   1.498 +   of SOME x => x
   1.499 +    | NONE => error "Bad serializer arguments";
   1.500 +
   1.501 +
   1.502 +(* code presentation *)
   1.503 +
   1.504 +fun code_of thy target module_name cs names_stmt =
   1.505 +  let
   1.506 +    val (names_cs, (naming, program)) = Code_Thingol.consts_program thy cs;
   1.507 +  in
   1.508 +    string (names_stmt naming) (serialize thy target (SOME module_name) []
   1.509 +      naming program names_cs)
   1.510 +  end;
   1.511 +
   1.512 +
   1.513 +(* code generation *)
   1.514 +
   1.515 +fun transitivly_non_empty_funs thy naming program =
   1.516 +  let
   1.517 +    val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   1.518 +    val names = map_filter (Code_Thingol.lookup_const naming) cs;
   1.519 +  in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   1.520 +
   1.521 +fun read_const_exprs thy cs =
   1.522 +  let
   1.523 +    val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   1.524 +    val (names3, (naming, program)) = Code_Thingol.consts_program thy cs2;
   1.525 +    val names4 = transitivly_non_empty_funs thy naming program;
   1.526 +    val cs5 = map_filter
   1.527 +      (fn (c, name) => if member (op =) names4 name then SOME c else NONE) (cs2 ~~ names3);
   1.528 +  in fold (insert (op =)) cs5 cs1 end;
   1.529 +
   1.530 +fun cached_program thy = 
   1.531 +  let
   1.532 +    val (naming, program) = Code_Thingol.cached_program thy;
   1.533 +  in (transitivly_non_empty_funs thy naming program, (naming, program)) end
   1.534 +
   1.535 +fun export_code thy cs seris =
   1.536 +  let
   1.537 +    val (cs', (naming, program)) = if null cs then cached_program thy
   1.538 +      else Code_Thingol.consts_program thy cs;
   1.539 +    fun mk_seri_dest dest = case dest
   1.540 +     of NONE => compile
   1.541 +      | SOME "-" => export
   1.542 +      | SOME f => file (Path.explode f)
   1.543 +    val _ = map (fn (((target, module), dest), args) =>
   1.544 +      (mk_seri_dest dest (serialize thy target module args naming program cs'))) seris;
   1.545 +  in () end;
   1.546 +
   1.547 +fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs) seris;
   1.548 +
   1.549 +
   1.550 +(** Isar setup **)
   1.551 +
   1.552 +val (inK, module_nameK, fileK) = ("in", "module_name", "file");
   1.553 +
   1.554 +val code_exprP =
   1.555 +  (Scan.repeat P.term_group
   1.556 +  -- Scan.repeat (P.$$$ inK |-- P.name
   1.557 +     -- Scan.option (P.$$$ module_nameK |-- P.name)
   1.558 +     -- Scan.option (P.$$$ fileK |-- P.name)
   1.559 +     -- Scan.optional (P.$$$ "(" |-- Args.parse --| P.$$$ ")") []
   1.560 +  ) >> (fn (raw_cs, seris) => export_code_cmd raw_cs seris));
   1.561 +
   1.562 +val _ = List.app OuterKeyword.keyword [inK, module_nameK, fileK];
   1.563 +
   1.564 +val _ =
   1.565 +  OuterSyntax.command "code_class" "define code syntax for class" K.thy_decl (
   1.566 +    parse_multi_syntax P.xname (Scan.option P.string)
   1.567 +    >> (Toplevel.theory oo fold) (fn (target, syns) =>
   1.568 +          fold (fn (raw_class, syn) => add_syntax_class_cmd target raw_class syn) syns)
   1.569 +  );
   1.570 +
   1.571 +val _ =
   1.572 +  OuterSyntax.command "code_instance" "define code syntax for instance" K.thy_decl (
   1.573 +    parse_multi_syntax (P.xname --| P.$$$ "::" -- P.xname)
   1.574 +      ((P.minus >> K true) || Scan.succeed false)
   1.575 +    >> (Toplevel.theory oo fold) (fn (target, syns) =>
   1.576 +          fold (fn (raw_inst, add_del) => add_syntax_inst_cmd target raw_inst add_del) syns)
   1.577 +  );
   1.578 +
   1.579 +val _ =
   1.580 +  OuterSyntax.command "code_type" "define code syntax for type constructor" K.thy_decl (
   1.581 +    parse_multi_syntax P.xname (parse_syntax I)
   1.582 +    >> (Toplevel.theory oo fold) (fn (target, syns) =>
   1.583 +          fold (fn (raw_tyco, syn) => add_syntax_tyco_cmd target raw_tyco syn) syns)
   1.584 +  );
   1.585 +
   1.586 +val _ =
   1.587 +  OuterSyntax.command "code_const" "define code syntax for constant" K.thy_decl (
   1.588 +    parse_multi_syntax P.term_group (parse_syntax fst)
   1.589 +    >> (Toplevel.theory oo fold) (fn (target, syns) =>
   1.590 +      fold (fn (raw_const, syn) => add_syntax_const_cmd target raw_const
   1.591 +        (Code_Printer.simple_const_syntax syn)) syns)
   1.592 +  );
   1.593 +
   1.594 +val _ =
   1.595 +  OuterSyntax.command "code_reserved" "declare words as reserved for target language" K.thy_decl (
   1.596 +    P.name -- Scan.repeat1 P.name
   1.597 +    >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   1.598 +  );
   1.599 +
   1.600 +val _ =
   1.601 +  OuterSyntax.command "code_include" "declare piece of code to be included in generated code" K.thy_decl (
   1.602 +    P.name -- P.name -- (P.text :|-- (fn "-" => Scan.succeed NONE
   1.603 +      | s => Scan.optional (P.$$$ "attach" |-- Scan.repeat1 P.term) [] >> pair s >> SOME))
   1.604 +    >> (fn ((target, name), content_consts) =>
   1.605 +        (Toplevel.theory o add_include_cmd target) (name, content_consts))
   1.606 +  );
   1.607 +
   1.608 +val _ =
   1.609 +  OuterSyntax.command "code_modulename" "alias module to other name" K.thy_decl (
   1.610 +    P.name -- Scan.repeat1 (P.name -- P.name)
   1.611 +    >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   1.612 +  );
   1.613 +
   1.614 +val _ =
   1.615 +  OuterSyntax.command "code_abort" "permit constant to be implemented as program abort" K.thy_decl (
   1.616 +    Scan.repeat1 P.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   1.617 +  );
   1.618 +
   1.619 +val _ =
   1.620 +  OuterSyntax.command "export_code" "generate executable code for constants"
   1.621 +    K.diag (P.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   1.622 +
   1.623 +fun shell_command thyname cmd = Toplevel.program (fn _ =>
   1.624 +  (use_thy thyname; case Scan.read OuterLex.stopper (P.!!! code_exprP)
   1.625 +    ((filter OuterLex.is_proper o OuterSyntax.scan Position.none) cmd)
   1.626 +   of SOME f => (writeln "Now generating code..."; f (theory thyname))
   1.627 +    | NONE => error ("Bad directive " ^ quote cmd)))
   1.628 +  handle TOPLEVEL_ERROR => OS.Process.exit OS.Process.failure;
   1.629 +
   1.630 +end; (*local*)
   1.631 +
   1.632 +end; (*struct*)