src/Tools/Code/code_target.ML
author haftmann
Thu Sep 16 17:31:51 2010 +0200 (2010-09-16)
changeset 39480 a2ed61449dcc
parent 39142 f63715f00fdd
child 39484 505f95975a5a
permissions -rw-r--r--
added code_stmts antiquotation from doc-src/more_antiquote.ML
     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
   109   -> {
   110     labelled_name: string -> string,
   111     reserved_syms: string list,
   112     includes: (string * Pretty.T) list,
   113     module_alias: string -> string option,
   114     class_syntax: string -> string option,
   115     tyco_syntax: string -> Code_Printer.tyco_syntax option,
   116     const_syntax: string -> Code_Printer.activated_const_syntax option,
   117     program: Code_Thingol.program }
   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   end;
   326 
   327 fun mount_serializer thy target some_width module_name args naming proto_program names =
   328   let
   329     val (default_width, abortable, data, program) =
   330       activate_target_for thy target naming proto_program;
   331     val serializer = case the_description data
   332      of Fundamental seri => #serializer seri;
   333     val reserved = the_reserved data;
   334     fun select_include names_all (name, (content, cs)) =
   335       if null cs then SOME (name, content)
   336       else if exists (fn c => case Code_Thingol.lookup_const naming c
   337        of SOME name => member (op =) names_all name
   338         | NONE => false) cs
   339       then SOME (name, content) else NONE;
   340     fun includes names_all = map_filter (select_include names_all)
   341       ((Symtab.dest o the_includes) data);
   342     val module_alias = the_module_alias data 
   343     val { class, instance, tyco, const } = the_symbol_syntax data;
   344     val literals = the_literals thy target;
   345     val width = the_default default_width some_width;
   346   in
   347     invoke_serializer thy abortable serializer literals reserved
   348       includes module_alias class instance tyco const module_name args
   349         naming program names width
   350   end;
   351 
   352 fun assert_module_name "" = error ("Empty module name not allowed.")
   353   | assert_module_name module_name = module_name;
   354 
   355 in
   356 
   357 fun export_code_for thy some_path target some_width some_module_name args naming program names =
   358   export some_path (mount_serializer thy target some_width some_module_name args naming program names);
   359 
   360 fun produce_code_for thy target some_width module_name args naming program names =
   361   let
   362     val (s, deresolve) = produce (mount_serializer thy target some_width (assert_module_name module_name) args naming program names)
   363   in (s, map deresolve names) end;
   364 
   365 fun present_code_for thy target some_width module_name args naming program (names, selects) =
   366   present selects (mount_serializer thy target some_width (assert_module_name module_name) args naming program names);
   367 
   368 fun check_code_for thy target strict args naming program names_cs =
   369   let
   370     val module_name = "Code";
   371     val { env_var, make_destination, make_command } =
   372       (#check o the_fundamental thy) target;
   373     val env_param = getenv env_var;
   374     fun ext_check env_param p =
   375       let 
   376         val destination = make_destination p;
   377         val _ = export (SOME destination) (mount_serializer thy target (SOME 80)
   378           module_name args naming program names_cs);
   379         val cmd = make_command env_param module_name;
   380       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   381         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   382         else ()
   383       end;
   384   in if env_param = ""
   385     then if strict
   386       then error (env_var ^ " not set; cannot check code for " ^ target)
   387       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   388     else Cache_IO.with_tmp_dir "Code_Test" (ext_check env_param)
   389   end;
   390 
   391 end; (* local *)
   392 
   393 
   394 (* code generation *)
   395 
   396 fun transitivly_non_empty_funs thy naming program =
   397   let
   398     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   399     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   400   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   401 
   402 fun read_const_exprs thy cs =
   403   let
   404     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   405     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   406     val names3 = transitivly_non_empty_funs thy naming program;
   407     val cs3 = map_filter (fn (c, name) =>
   408       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   409   in union (op =) cs3 cs1 end;
   410 
   411 fun prep_destination "" = NONE
   412   | prep_destination "-" = NONE
   413   | prep_destination s = SOME (Path.explode s);
   414 
   415 fun export_code thy cs seris =
   416   let
   417     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   418     val _ = map (fn (((target, module_name), some_path), args) =>
   419       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   420   in () end;
   421 
   422 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   423   ((map o apfst o apsnd) prep_destination seris);
   424 
   425 fun produce_code thy cs target some_width some_module_name args =
   426   let
   427     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   428   in produce_code_for thy target some_width some_module_name args naming program names_cs end;
   429 
   430 fun present_code thy cs names_stmt target some_width some_module_name args =
   431   let
   432     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   433   in present_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   434 
   435 fun check_code thy cs seris =
   436   let
   437     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   438     val _ = map (fn ((target, strict), args) =>
   439       check_code_for thy target strict args naming program names_cs) seris;
   440   in () end;
   441 
   442 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   443 
   444 local
   445 
   446 val parse_const_terms = Scan.repeat1 Args.term
   447   >> (fn ts => fn thy => map (Code.check_const thy) ts);
   448 
   449 fun parse_names category parse internalize lookup =
   450   Scan.lift (Args.parens (Args.$$$ category)) |-- Scan.repeat1 parse
   451   >> (fn xs => fn thy => fn naming => map_filter (lookup naming o internalize thy) xs);
   452   
   453 val parse_consts = parse_names "consts" Args.term
   454   Code.check_const Code_Thingol.lookup_const ;
   455 
   456 val parse_types = parse_names "types" (Scan.lift Args.name)
   457   Sign.intern_type Code_Thingol.lookup_tyco;
   458 
   459 val parse_classes = parse_names "classes" (Scan.lift Args.name)
   460   Sign.intern_class Code_Thingol.lookup_class;
   461 
   462 val parse_instances = parse_names "instances" (Scan.lift (Args.name --| Args.$$$ "::" -- Args.name))
   463   (fn thy => fn (raw_tyco, raw_class) => (Sign.intern_class thy raw_class, Sign.intern_type thy raw_tyco))
   464     Code_Thingol.lookup_instance;
   465 
   466 in
   467 
   468 val _ = Thy_Output.antiquotation "code_stmts"
   469   (parse_const_terms -- Scan.repeat (parse_consts || parse_types || parse_classes || parse_instances)
   470     -- Scan.lift (Args.parens (Args.name -- Scan.option Parse.int)))
   471   (fn {context = ctxt, ...} => fn ((mk_cs, mk_stmtss), (target, some_width)) =>
   472     let val thy = ProofContext.theory_of ctxt in
   473       present_code thy (mk_cs thy)
   474         (fn naming => maps (fn f => f thy naming) mk_stmtss)
   475         target some_width "Example" []
   476       |> Latex.output_typewriter
   477     end);
   478 
   479 end;
   480 
   481 
   482 (** serializer configuration **)
   483 
   484 (* data access *)
   485 
   486 fun cert_class thy class =
   487   let
   488     val _ = AxClass.get_info thy class;
   489   in class end;
   490 
   491 fun read_class thy = cert_class thy o Sign.intern_class thy;
   492 
   493 fun cert_tyco thy tyco =
   494   let
   495     val _ = if Sign.declared_tyname thy tyco then ()
   496       else error ("No such type constructor: " ^ quote tyco);
   497   in tyco end;
   498 
   499 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   500 
   501 fun cert_inst thy (class, tyco) =
   502   (cert_class thy class, cert_tyco thy tyco);
   503 
   504 fun read_inst thy (raw_tyco, raw_class) =
   505   (read_class thy raw_class, read_tyco thy raw_tyco);
   506 
   507 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   508   let
   509     val x = prep_x thy raw_x;
   510     val change = case some_raw_syn
   511      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   512       | NONE => del x;
   513   in (map_symbol_syntax target o mapp) change thy end;
   514 
   515 fun gen_add_class_syntax prep_class =
   516   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   517 
   518 fun gen_add_instance_syntax prep_inst =
   519   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   520 
   521 fun gen_add_tyco_syntax prep_tyco =
   522   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   523     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   524       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   525       else syn);
   526 
   527 fun gen_add_const_syntax prep_const =
   528   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   529     (fn thy => fn c => fn syn =>
   530       if Code_Printer.requires_args syn > Code.args_number thy c
   531       then error ("Too many arguments in syntax for constant " ^ quote c)
   532       else syn);
   533 
   534 fun add_reserved target =
   535   let
   536     fun add sym syms = if member (op =) syms sym
   537       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   538       else insert (op =) sym syms
   539   in map_reserved target o add end;
   540 
   541 fun gen_add_include read_const target args thy =
   542   let
   543     fun add (name, SOME (content, raw_cs)) incls =
   544           let
   545             val _ = if Symtab.defined incls name
   546               then warning ("Overwriting existing include " ^ name)
   547               else ();
   548             val cs = map (read_const thy) raw_cs;
   549           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   550       | add (name, NONE) incls = Symtab.delete name incls;
   551   in map_includes target (add args) thy end;
   552 
   553 val add_include = gen_add_include (K I);
   554 val add_include_cmd = gen_add_include Code.read_const;
   555 
   556 fun add_module_alias target (thyname, "") =
   557       map_module_alias target (Symtab.delete thyname)
   558   | add_module_alias target (thyname, modlname) =
   559       let
   560         val xs = Long_Name.explode modlname;
   561         val xs' = map (Name.desymbolize true) xs;
   562       in if xs' = xs
   563         then map_module_alias target (Symtab.update (thyname, modlname))
   564         else error ("Invalid module name: " ^ quote modlname ^ "\n"
   565           ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   566       end;
   567 
   568 fun gen_allow_abort prep_const raw_c thy =
   569   let
   570     val c = prep_const thy raw_c;
   571   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   572 
   573 
   574 (* concrete syntax *)
   575 
   576 local
   577 
   578 fun zip_list (x::xs) f g =
   579   f
   580   :|-- (fn y =>
   581     fold_map (fn x => g |-- f >> pair x) xs
   582     :|-- (fn xys => pair ((x, y) :: xys)));
   583 
   584 fun process_multi_syntax parse_thing parse_syntax change =
   585   (Parse.and_list1 parse_thing
   586   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   587         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   588   >> (Toplevel.theory oo fold)
   589     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   590 
   591 in
   592 
   593 val add_class_syntax = gen_add_class_syntax cert_class;
   594 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   595 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   596 val add_const_syntax = gen_add_const_syntax (K I);
   597 val allow_abort = gen_allow_abort (K I);
   598 val add_reserved = add_reserved;
   599 val add_include = add_include;
   600 
   601 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   602 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   603 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   604 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   605 val allow_abort_cmd = gen_allow_abort Code.read_const;
   606 
   607 fun parse_args f args =
   608   case Scan.read Token.stopper f args
   609    of SOME x => x
   610     | NONE => error "Bad serializer arguments";
   611 
   612 
   613 (** Isar setup **)
   614 
   615 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   616 
   617 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   618 
   619 val code_exprP =
   620   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   621     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   622       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   623       >> (fn seris => check_code_cmd raw_cs seris)
   624     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   625        -- Scan.optional (Parse.$$$ module_nameK |-- Parse.name) ""
   626        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   627        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   628 
   629 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   630 
   631 val _ =
   632   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   633     process_multi_syntax Parse.xname (Scan.option Parse.string)
   634     add_class_syntax_cmd);
   635 
   636 val _ =
   637   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   638     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   639       (Scan.option (Parse.minus >> K ()))
   640     add_instance_syntax_cmd);
   641 
   642 val _ =
   643   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   644     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   645     add_tyco_syntax_cmd);
   646 
   647 val _ =
   648   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   649     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   650     add_const_syntax_cmd);
   651 
   652 val _ =
   653   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   654     Keyword.thy_decl (
   655     Parse.name -- Scan.repeat1 Parse.name
   656     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   657   );
   658 
   659 val _ =
   660   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   661     Keyword.thy_decl (
   662     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   663       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   664     >> (fn ((target, name), content_consts) =>
   665         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   666   );
   667 
   668 val _ =
   669   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   670     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   671     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   672   );
   673 
   674 val _ =
   675   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   676     Keyword.thy_decl (
   677     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   678   );
   679 
   680 val _ =
   681   Outer_Syntax.command "export_code" "generate executable code for constants"
   682     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   683 
   684 fun shell_command thyname cmd = Toplevel.program (fn _ =>
   685   (use_thy thyname; case Scan.read Token.stopper (Parse.!!! code_exprP)
   686     ((filter Token.is_proper o Outer_Syntax.scan Position.none) cmd)
   687    of SOME f => (writeln "Now generating code..."; f (Thy_Info.get_theory thyname))
   688     | NONE => error ("Bad directive " ^ quote cmd)))
   689   handle Runtime.TOPLEVEL_ERROR => OS.Process.exit OS.Process.failure;
   690 
   691 end; (*local*)
   692 
   693 end; (*struct*)