src/Tools/Code/code_target.ML
author haftmann
Thu Sep 23 11:29:22 2010 +0200 (2010-09-23)
changeset 39659 07549694e2f1
parent 39646 64fdbee67135
child 39661 6381d18507ef
permissions -rw-r--r--
shifted abstraction over imperative print mode
     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   type serializer
    32   type literals = Code_Printer.literals
    33   val add_target: string * { serializer: serializer, literals: literals,
    34     check: { env_var: string, make_destination: Path.T -> Path.T,
    35       make_command: string -> string -> string } } -> theory -> theory
    36   val extend_target: string *
    37       (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    38     -> theory -> theory
    39   val assert_target: theory -> string -> string
    40   val the_literals: theory -> string -> literals
    41   type serialization
    42   val parse_args: 'a parser -> Token.T list -> 'a
    43   val serialization: (int -> Path.T option -> 'a -> unit)
    44     -> (string list -> int -> 'a -> string * (string -> string option))
    45     -> 'a -> serialization
    46   val set_default_code_width: int -> theory -> theory
    47 
    48   val allow_abort: string -> theory -> theory
    49   type tyco_syntax = Code_Printer.tyco_syntax
    50   type const_syntax = Code_Printer.const_syntax
    51   val add_class_syntax: string -> class -> string option -> theory -> theory
    52   val add_instance_syntax: string -> class * string -> unit option -> theory -> theory
    53   val add_tyco_syntax: string -> string -> tyco_syntax option -> theory -> theory
    54   val add_const_syntax: string -> string -> const_syntax option -> theory -> theory
    55   val add_reserved: string -> string -> theory -> theory
    56   val add_include: string -> string * (string * string list) option -> theory -> theory
    57 
    58   val codegen_tool: string (*theory name*) -> bool -> string (*export_code expr*) -> unit
    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 using_plain_output f x = Print_Mode.setmp [] f x;
    77 
    78 fun serialization output _ content width (Export some_path) =
    79       (using_plain_output (output width some_path) content; NONE)
    80   | serialization _ string content width Produce = 
    81       SOME (using_plain_output (string [] width) content)
    82   | serialization _ string content width (Present stmt_names) =
    83       SOME (using_plain_output (string stmt_names width) content);
    84 
    85 fun export some_path serializer naming program names =
    86   (using_plain_output (serializer naming program) names (Export some_path); ());
    87 fun produce serializer naming program names =
    88   the (using_plain_output (serializer naming program) names Produce);
    89 fun present stmt_names serializer naming program names =
    90   fst (the (using_plain_output (serializer naming program) names (Present stmt_names)));
    91 
    92 
    93 (** theory data **)
    94 
    95 datatype symbol_syntax_data = Symbol_Syntax_Data of {
    96   class: string Symtab.table,
    97   instance: unit Symreltab.table,
    98   tyco: Code_Printer.tyco_syntax Symtab.table,
    99   const: Code_Printer.const_syntax Symtab.table
   100 };
   101 
   102 fun make_symbol_syntax_data ((class, instance), (tyco, const)) =
   103   Symbol_Syntax_Data { class = class, instance = instance, tyco = tyco, const = const };
   104 fun map_symbol_syntax_data f (Symbol_Syntax_Data { class, instance, tyco, const }) =
   105   make_symbol_syntax_data (f ((class, instance), (tyco, const)));
   106 fun merge_symbol_syntax_data
   107   (Symbol_Syntax_Data { class = class1, instance = instance1, tyco = tyco1, const = const1 },
   108     Symbol_Syntax_Data { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
   109   make_symbol_syntax_data (
   110     (Symtab.join (K snd) (class1, class2),
   111        Symreltab.join (K snd) (instance1, instance2)),
   112     (Symtab.join (K snd) (tyco1, tyco2),
   113        Symtab.join (K snd) (const1, const2))
   114   );
   115 
   116 type serializer = Token.T list
   117   -> {
   118     labelled_name: string -> string,
   119     reserved_syms: string list,
   120     includes: (string * Pretty.T) list,
   121     module_alias: string -> string option,
   122     class_syntax: string -> string option,
   123     tyco_syntax: string -> Code_Printer.tyco_syntax option,
   124     const_syntax: string -> Code_Printer.activated_const_syntax option,
   125     program: Code_Thingol.program }
   126   -> serialization;
   127 
   128 datatype description = Fundamental of { serializer: serializer,
   129       literals: literals,
   130       check: { env_var: string, make_destination: Path.T -> Path.T,
   131         make_command: string -> string -> string } }
   132   | Extension of string *
   133       (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   134 
   135 datatype target = Target of {
   136   serial: serial,
   137   description: description,
   138   reserved: string list,
   139   includes: (Pretty.T * string list) Symtab.table,
   140   module_alias: string Symtab.table,
   141   symbol_syntax: symbol_syntax_data
   142 };
   143 
   144 fun make_target ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))) =
   145   Target { serial = serial, description = description, reserved = reserved, 
   146     includes = includes, module_alias = module_alias, symbol_syntax = symbol_syntax };
   147 fun map_target f ( Target { serial, description, reserved, includes, module_alias, symbol_syntax } ) =
   148   make_target (f ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))));
   149 fun merge_target strict target (Target { serial = serial1, description = description,
   150   reserved = reserved1, includes = includes1,
   151   module_alias = module_alias1, symbol_syntax = symbol_syntax1 },
   152     Target { serial = serial2, description = _,
   153       reserved = reserved2, includes = includes2,
   154       module_alias = module_alias2, symbol_syntax = symbol_syntax2 }) =
   155   if serial1 = serial2 orelse not strict then
   156     make_target ((serial1, description),
   157       ((merge (op =) (reserved1, reserved2), Symtab.join (K snd) (includes1, includes2)),
   158         (Symtab.join (K snd) (module_alias1, module_alias2),
   159           merge_symbol_syntax_data (symbol_syntax1, symbol_syntax2))
   160     ))
   161   else
   162     error ("Incompatible targets: " ^ quote target);
   163 
   164 fun the_description (Target { description, ... }) = description;
   165 fun the_reserved (Target { reserved, ... }) = reserved;
   166 fun the_includes (Target { includes, ... }) = includes;
   167 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   168 fun the_symbol_syntax (Target { symbol_syntax = Symbol_Syntax_Data x, ... }) = x;
   169 
   170 structure Targets = Theory_Data
   171 (
   172   type T = (target Symtab.table * string list) * int;
   173   val empty = ((Symtab.empty, []), 80);
   174   val extend = I;
   175   fun merge (((target1, exc1), width1), ((target2, exc2), width2)) : T =
   176     ((Symtab.join (merge_target true) (target1, target2),
   177       Library.merge (op =) (exc1, exc2)), Int.max (width1, width2));
   178 );
   179 
   180 val abort_allowed = snd o fst o Targets.get;
   181 
   182 fun assert_target thy target = if Symtab.defined ((fst o fst) (Targets.get thy)) target
   183   then target
   184   else error ("Unknown code target language: " ^ quote target);
   185 
   186 fun put_target (target, seri) thy =
   187   let
   188     val lookup_target = Symtab.lookup ((fst o fst) (Targets.get thy));
   189     val _ = case seri
   190      of Extension (super, _) => if is_some (lookup_target super) then ()
   191           else error ("Unknown code target language: " ^ quote super)
   192       | _ => ();
   193     val overwriting = case (Option.map the_description o lookup_target) target
   194      of NONE => false
   195       | SOME (Extension _) => true
   196       | SOME (Fundamental _) => (case seri
   197          of Extension _ => error ("Will not overwrite existing target " ^ quote target)
   198           | _ => true);
   199     val _ = if overwriting
   200       then warning ("Overwriting existing target " ^ quote target)
   201       else (); 
   202   in
   203     thy
   204     |> (Targets.map o apfst o apfst o Symtab.update)
   205           (target, make_target ((serial (), seri), (([], Symtab.empty),
   206             (Symtab.empty, make_symbol_syntax_data ((Symtab.empty, Symreltab.empty),
   207               (Symtab.empty, Symtab.empty))))))
   208   end;
   209 
   210 fun add_target (target, seri) = put_target (target, Fundamental seri);
   211 fun extend_target (target, (super, modify)) =
   212   put_target (target, Extension (super, modify));
   213 
   214 fun map_target_data target f thy =
   215   let
   216     val _ = assert_target thy target;
   217   in
   218     thy
   219     |> (Targets.map o apfst o apfst o Symtab.map_entry target o map_target) f
   220   end;
   221 
   222 fun map_reserved target =
   223   map_target_data target o apsnd o apfst o apfst;
   224 fun map_includes target =
   225   map_target_data target o apsnd o apfst o apsnd;
   226 fun map_module_alias target =
   227   map_target_data target o apsnd o apsnd o apfst;
   228 fun map_symbol_syntax target =
   229   map_target_data target o apsnd o apsnd o apsnd o map_symbol_syntax_data;
   230 
   231 fun set_default_code_width k = (Targets.map o apsnd) (K k);
   232 
   233 
   234 (** serializer usage **)
   235 
   236 (* montage *)
   237 
   238 fun the_fundamental thy =
   239   let
   240     val ((targets, _), _) = Targets.get thy;
   241     fun fundamental target = case Symtab.lookup targets target
   242      of SOME data => (case the_description data
   243          of Fundamental data => data
   244           | Extension (super, _) => fundamental super)
   245       | NONE => error ("Unknown code target language: " ^ quote target);
   246   in fundamental end;
   247 
   248 fun the_literals thy = #literals o the_fundamental thy;
   249 
   250 local
   251 
   252 fun activate_target thy target =
   253   let
   254     val ((targets, abortable), default_width) = Targets.get thy;
   255     fun collapse_hierarchy target =
   256       let
   257         val data = case Symtab.lookup targets target
   258          of SOME data => data
   259           | NONE => error ("Unknown code target language: " ^ quote target);
   260       in case the_description data
   261        of Fundamental _ => (K I, data)
   262         | Extension (super, modify) => let
   263             val (modify', data') = collapse_hierarchy super
   264           in (fn naming => modify' naming #> modify naming, merge_target false target (data', data)) end
   265       end;
   266     val (modify, data) = collapse_hierarchy target;
   267   in (default_width, abortable, data, modify) end;
   268 
   269 fun activate_syntax lookup_name src_tab = Symtab.empty
   270   |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   271        of SOME name => (SOME name,
   272             Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   273         | NONE => (NONE, tab)) (Symtab.keys src_tab)
   274   |>> map_filter I;
   275 
   276 fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   277   |> fold_map (fn c => fn (tab, naming) =>
   278       case Code_Thingol.lookup_const naming c
   279        of SOME name => let
   280               val (syn, naming') = Code_Printer.activate_const_syntax thy
   281                 literals c (the (Symtab.lookup src_tab c)) naming
   282             in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   283         | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   284   |>> map_filter I;
   285 
   286 fun activate_symbol_syntax thy literals naming
   287     class_syntax instance_syntax tyco_syntax const_syntax =
   288   let
   289     val (names_class, class_syntax') =
   290       activate_syntax (Code_Thingol.lookup_class naming) class_syntax;
   291     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   292       (Symreltab.keys instance_syntax);
   293     val (names_tyco, tyco_syntax') =
   294       activate_syntax (Code_Thingol.lookup_tyco naming) tyco_syntax;
   295     val (names_const, (const_syntax', _)) =
   296       activate_const_syntax thy literals const_syntax naming;
   297   in
   298     (names_class @ names_inst @ names_tyco @ names_const,
   299       (class_syntax', tyco_syntax', const_syntax'))
   300   end;
   301 
   302 fun project_program thy abortable names_hidden names1 program2 =
   303   let
   304     val names2 = subtract (op =) names_hidden names1;
   305     val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   306     val names4 = Graph.all_succs program3 names2;
   307     val empty_funs = filter_out (member (op =) abortable)
   308       (Code_Thingol.empty_funs program3);
   309     val _ = if null empty_funs then () else error ("No code equations for "
   310       ^ commas (map (Sign.extern_const thy) empty_funs));
   311     val program4 = Graph.subgraph (member (op =) names4) program3;
   312   in (names4, program4) end;
   313 
   314 fun invoke_serializer thy abortable serializer literals reserved all_includes
   315     module_alias proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax
   316     module_name args naming proto_program names =
   317   let
   318     val (names_hidden, (class_syntax, tyco_syntax, const_syntax)) =
   319       activate_symbol_syntax thy literals naming
   320         proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax;
   321     val (names_all, program) = project_program thy abortable names_hidden names proto_program;
   322     fun select_include (name, (content, cs)) =
   323       if null cs orelse exists (fn c => case Code_Thingol.lookup_const naming c
   324        of SOME name => member (op =) names_all name
   325         | NONE => false) cs
   326       then SOME (name, content) else NONE;
   327     val includes = map_filter select_include (Symtab.dest all_includes);
   328   in
   329     serializer args {
   330       labelled_name = Code_Thingol.labelled_name thy proto_program,
   331       reserved_syms = reserved,
   332       includes = includes,
   333       module_alias = if module_name = "" then Symtab.lookup module_alias else K (SOME module_name),
   334       class_syntax = Symtab.lookup class_syntax,
   335       tyco_syntax = Symtab.lookup tyco_syntax,
   336       const_syntax = Symtab.lookup const_syntax,
   337       program = program }
   338   end;
   339 
   340 fun mount_serializer thy target some_width module_name args =
   341   let
   342     val (default_width, abortable, data, modify) = activate_target thy target;
   343     val serializer = case the_description data
   344      of Fundamental seri => #serializer seri;
   345     val reserved = the_reserved data;
   346     val module_alias = the_module_alias data 
   347     val { class, instance, tyco, const } = the_symbol_syntax data;
   348     val literals = the_literals thy target;
   349     val width = the_default default_width some_width;
   350   in fn naming => fn program => fn names =>
   351     invoke_serializer thy abortable serializer literals reserved
   352       (the_includes data) module_alias class instance tyco const module_name args
   353         naming (modify naming program) names width
   354   end;
   355 
   356 fun assert_module_name "" = error ("Empty module name not allowed.")
   357   | assert_module_name module_name = module_name;
   358 
   359 in
   360 
   361 fun export_code_for thy some_path target some_width module_name args =
   362   export some_path (mount_serializer thy target some_width module_name args);
   363 
   364 fun produce_code_for thy target some_width module_name args =
   365   let
   366     val serializer = mount_serializer thy target some_width (assert_module_name module_name) args;
   367   in fn naming => fn program => fn names =>
   368     produce serializer naming program names |> apsnd (fn deresolve => map deresolve names)
   369   end;
   370 
   371 fun present_code_for thy target some_width module_name args =
   372   let
   373     val serializer = mount_serializer thy target some_width (assert_module_name module_name) args;
   374   in fn naming => fn program => fn (names, selects) =>
   375     present selects serializer naming program names
   376   end;
   377 
   378 fun check_code_for thy target strict args naming program names_cs =
   379   let
   380     val module_name = "Code";
   381     val { env_var, make_destination, make_command } =
   382       (#check o the_fundamental thy) target;
   383     val env_param = getenv env_var;
   384     fun ext_check env_param p =
   385       let 
   386         val destination = make_destination p;
   387         val _ = export (SOME destination) (mount_serializer thy target (SOME 80)
   388           module_name args) naming program names_cs;
   389         val cmd = make_command env_param module_name;
   390       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   391         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   392         else ()
   393       end;
   394   in if env_param = ""
   395     then if strict
   396       then error (env_var ^ " not set; cannot check code for " ^ target)
   397       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   398     else Cache_IO.with_tmp_dir "Code_Test" (ext_check env_param)
   399   end;
   400 
   401 end; (* local *)
   402 
   403 
   404 (* code generation *)
   405 
   406 fun transitivly_non_empty_funs thy naming program =
   407   let
   408     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   409     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   410   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   411 
   412 fun read_const_exprs thy cs =
   413   let
   414     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   415     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   416     val names3 = transitivly_non_empty_funs thy naming program;
   417     val cs3 = map_filter (fn (c, name) =>
   418       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   419   in union (op =) cs3 cs1 end;
   420 
   421 fun prep_destination "" = NONE
   422   | prep_destination "-" = NONE
   423   | prep_destination s = SOME (Path.explode s);
   424 
   425 fun export_code thy cs seris =
   426   let
   427     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   428     val _ = map (fn (((target, module_name), some_path), args) =>
   429       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   430   in () end;
   431 
   432 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   433   ((map o apfst o apsnd) prep_destination seris);
   434 
   435 fun produce_code thy cs target some_width some_module_name args =
   436   let
   437     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   438   in produce_code_for thy target some_width some_module_name args naming program names_cs end;
   439 
   440 fun present_code thy cs names_stmt target some_width some_module_name args =
   441   let
   442     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   443   in present_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   444 
   445 fun check_code thy cs seris =
   446   let
   447     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   448     val _ = map (fn ((target, strict), args) =>
   449       check_code_for thy target strict args naming program names_cs) seris;
   450   in () end;
   451 
   452 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   453 
   454 local
   455 
   456 val parse_const_terms = Scan.repeat1 Args.term
   457   >> (fn ts => fn thy => map (Code.check_const thy) ts);
   458 
   459 fun parse_names category parse internalize lookup =
   460   Scan.lift (Args.parens (Args.$$$ category)) |-- Scan.repeat1 parse
   461   >> (fn xs => fn thy => fn naming => map_filter (lookup naming o internalize thy) xs);
   462   
   463 val parse_consts = parse_names "consts" Args.term
   464   Code.check_const Code_Thingol.lookup_const ;
   465 
   466 val parse_types = parse_names "types" (Scan.lift Args.name)
   467   Sign.intern_type Code_Thingol.lookup_tyco;
   468 
   469 val parse_classes = parse_names "classes" (Scan.lift Args.name)
   470   Sign.intern_class Code_Thingol.lookup_class;
   471 
   472 val parse_instances = parse_names "instances" (Scan.lift (Args.name --| Args.$$$ "::" -- Args.name))
   473   (fn thy => fn (raw_tyco, raw_class) => (Sign.intern_class thy raw_class, Sign.intern_type thy raw_tyco))
   474     Code_Thingol.lookup_instance;
   475 
   476 in
   477 
   478 val _ = Thy_Output.antiquotation "code_stmts"
   479   (parse_const_terms -- Scan.repeat (parse_consts || parse_types || parse_classes || parse_instances)
   480     -- Scan.lift (Args.parens (Args.name -- Scan.option Parse.int)))
   481   (fn {context = ctxt, ...} => fn ((mk_cs, mk_stmtss), (target, some_width)) =>
   482     let val thy = ProofContext.theory_of ctxt in
   483       present_code thy (mk_cs thy)
   484         (fn naming => maps (fn f => f thy naming) mk_stmtss)
   485         target some_width "Example" []
   486       |> Latex.output_typewriter
   487     end);
   488 
   489 end;
   490 
   491 
   492 (** serializer configuration **)
   493 
   494 (* data access *)
   495 
   496 fun cert_class thy class =
   497   let
   498     val _ = AxClass.get_info thy class;
   499   in class end;
   500 
   501 fun read_class thy = cert_class thy o Sign.intern_class thy;
   502 
   503 fun cert_tyco thy tyco =
   504   let
   505     val _ = if Sign.declared_tyname thy tyco then ()
   506       else error ("No such type constructor: " ^ quote tyco);
   507   in tyco end;
   508 
   509 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   510 
   511 fun cert_inst thy (class, tyco) =
   512   (cert_class thy class, cert_tyco thy tyco);
   513 
   514 fun read_inst thy (raw_tyco, raw_class) =
   515   (read_class thy raw_class, read_tyco thy raw_tyco);
   516 
   517 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   518   let
   519     val x = prep_x thy raw_x;
   520     val change = case some_raw_syn
   521      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   522       | NONE => del x;
   523   in (map_symbol_syntax target o mapp) change thy end;
   524 
   525 fun gen_add_class_syntax prep_class =
   526   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   527 
   528 fun gen_add_instance_syntax prep_inst =
   529   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   530 
   531 fun gen_add_tyco_syntax prep_tyco =
   532   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   533     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   534       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   535       else syn);
   536 
   537 fun gen_add_const_syntax prep_const =
   538   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   539     (fn thy => fn c => fn syn =>
   540       if Code_Printer.requires_args syn > Code.args_number thy c
   541       then error ("Too many arguments in syntax for constant " ^ quote c)
   542       else syn);
   543 
   544 fun add_reserved target =
   545   let
   546     fun add sym syms = if member (op =) syms sym
   547       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   548       else insert (op =) sym syms
   549   in map_reserved target o add end;
   550 
   551 fun gen_add_include read_const target args thy =
   552   let
   553     fun add (name, SOME (content, raw_cs)) incls =
   554           let
   555             val _ = if Symtab.defined incls name
   556               then warning ("Overwriting existing include " ^ name)
   557               else ();
   558             val cs = map (read_const thy) raw_cs;
   559           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   560       | add (name, NONE) incls = Symtab.delete name incls;
   561   in map_includes target (add args) thy end;
   562 
   563 val add_include = gen_add_include (K I);
   564 val add_include_cmd = gen_add_include Code.read_const;
   565 
   566 fun add_module_alias target (thyname, "") =
   567       map_module_alias target (Symtab.delete thyname)
   568   | add_module_alias target (thyname, modlname) =
   569       let
   570         val xs = Long_Name.explode modlname;
   571         val xs' = map (Name.desymbolize true) xs;
   572       in if xs' = xs
   573         then map_module_alias target (Symtab.update (thyname, modlname))
   574         else error ("Invalid module name: " ^ quote modlname ^ "\n"
   575           ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   576       end;
   577 
   578 fun gen_allow_abort prep_const raw_c thy =
   579   let
   580     val c = prep_const thy raw_c;
   581   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   582 
   583 
   584 (* concrete syntax *)
   585 
   586 local
   587 
   588 fun zip_list (x::xs) f g =
   589   f
   590   :|-- (fn y =>
   591     fold_map (fn x => g |-- f >> pair x) xs
   592     :|-- (fn xys => pair ((x, y) :: xys)));
   593 
   594 fun process_multi_syntax parse_thing parse_syntax change =
   595   (Parse.and_list1 parse_thing
   596   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   597         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   598   >> (Toplevel.theory oo fold)
   599     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   600 
   601 in
   602 
   603 val add_class_syntax = gen_add_class_syntax cert_class;
   604 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   605 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   606 val add_const_syntax = gen_add_const_syntax (K I);
   607 val allow_abort = gen_allow_abort (K I);
   608 val add_reserved = add_reserved;
   609 val add_include = add_include;
   610 
   611 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   612 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   613 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   614 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   615 val allow_abort_cmd = gen_allow_abort Code.read_const;
   616 
   617 fun parse_args f args =
   618   case Scan.read Token.stopper f args
   619    of SOME x => x
   620     | NONE => error "Bad serializer arguments";
   621 
   622 
   623 (** Isar setup **)
   624 
   625 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   626 
   627 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   628 
   629 val code_exprP =
   630   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   631     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   632       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   633       >> (fn seris => check_code_cmd raw_cs seris)
   634     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   635        -- Scan.optional (Parse.$$$ module_nameK |-- Parse.name) ""
   636        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   637        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   638 
   639 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   640 
   641 val _ =
   642   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   643     process_multi_syntax Parse.xname (Scan.option Parse.string)
   644     add_class_syntax_cmd);
   645 
   646 val _ =
   647   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   648     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   649       (Scan.option (Parse.minus >> K ()))
   650     add_instance_syntax_cmd);
   651 
   652 val _ =
   653   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   654     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   655     add_tyco_syntax_cmd);
   656 
   657 val _ =
   658   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   659     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   660     add_const_syntax_cmd);
   661 
   662 val _ =
   663   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   664     Keyword.thy_decl (
   665     Parse.name -- Scan.repeat1 Parse.name
   666     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   667   );
   668 
   669 val _ =
   670   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   671     Keyword.thy_decl (
   672     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   673       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   674     >> (fn ((target, name), content_consts) =>
   675         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   676   );
   677 
   678 val _ =
   679   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   680     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   681     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   682   );
   683 
   684 val _ =
   685   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   686     Keyword.thy_decl (
   687     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   688   );
   689 
   690 val _ =
   691   Outer_Syntax.command "export_code" "generate executable code for constants"
   692     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   693 
   694 end; (*local*)
   695 
   696 
   697 (** external entrance point -- for codegen tool **)
   698 
   699 fun codegen_tool thyname qnd cmd_expr =
   700   let
   701     val thy = Thy_Info.get_theory thyname;
   702     val _ = quick_and_dirty := qnd;
   703     val parse = Scan.read Token.stopper (Parse.!!! code_exprP) o
   704       (filter Token.is_proper o Outer_Syntax.scan Position.none);
   705   in case parse cmd_expr
   706    of SOME f => (writeln "Now generating code..."; f thy)
   707     | NONE => error ("Bad directive " ^ quote cmd_expr)
   708   end;
   709 
   710 end; (*struct*)