src/Tools/Code/code_target.ML
author haftmann
Sun May 19 20:15:00 2013 +0200 (2013-05-19)
changeset 52068 1abaea5d5a22
parent 51685 385ef6706252
child 52137 7f7337447b1b
permissions -rw-r--r--
tuned, including signature
     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) list * 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) list * 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 generatedN: string
    32   val evaluator: theory -> string -> Code_Thingol.naming -> Code_Thingol.program
    33     -> string list -> ((string * class list) list * Code_Thingol.itype) * Code_Thingol.iterm
    34     -> (string * string) list * string
    35 
    36   type serializer
    37   type literals = Code_Printer.literals
    38   val add_target: string * { serializer: serializer, literals: literals,
    39     check: { env_var: string, make_destination: Path.T -> Path.T, make_command: string -> string } }
    40     -> theory -> theory
    41   val extend_target: string *
    42       (string * (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program))
    43     -> theory -> theory
    44   val assert_target: theory -> string -> string
    45   val the_literals: theory -> string -> literals
    46   type serialization
    47   val parse_args: 'a parser -> Token.T list -> 'a
    48   val serialization: (int -> Path.T option -> 'a -> unit)
    49     -> (string list -> int -> 'a -> (string * string) list * (string -> string option))
    50     -> 'a -> serialization
    51   val set_default_code_width: int -> theory -> theory
    52 
    53   val allow_abort: string -> theory -> theory
    54   type tyco_syntax = Code_Printer.tyco_syntax
    55   type const_syntax = Code_Printer.const_syntax
    56   val add_class_syntax: string -> class -> string option -> theory -> theory
    57   val add_instance_syntax: string -> class * string -> unit option -> theory -> theory
    58   val add_tyco_syntax: string -> string -> tyco_syntax option -> theory -> theory
    59   val add_const_syntax: string -> string -> const_syntax option -> theory -> theory
    60   val add_reserved: string -> string -> theory -> theory
    61   val add_include: string -> string * (string * string list) option -> theory -> theory
    62 
    63   val codegen_tool: string (*theory name*) -> string (*export_code expr*) -> unit
    64 
    65   val setup: theory -> theory
    66 end;
    67 
    68 structure Code_Target : CODE_TARGET =
    69 struct
    70 
    71 open Basic_Code_Thingol;
    72 
    73 type literals = Code_Printer.literals;
    74 type tyco_syntax = Code_Printer.tyco_syntax;
    75 type const_syntax = Code_Printer.const_syntax;
    76 
    77 
    78 (** abstract nonsense **)
    79 
    80 datatype destination = Export of Path.T option | Produce | Present of string list;
    81 type serialization = int -> destination -> ((string * string) list * (string -> string option)) option;
    82 
    83 fun serialization output _ content width (Export some_path) =
    84       (output width some_path content; NONE)
    85   | serialization _ string content width Produce =
    86       string [] width content |> SOME
    87   | serialization _ string content width (Present stmt_names) =
    88      string stmt_names width content
    89      |> (apfst o map o apsnd) (Pretty.output (SOME width) o Pretty.str)
    90      |> SOME;
    91 
    92 fun export some_path f = (f (Export some_path); ());
    93 fun produce f = the (f Produce);
    94 fun present stmt_names f = space_implode "\n\n" (map snd (fst (the (f (Present stmt_names)))));
    95 
    96 
    97 (** theory data **)
    98 
    99 datatype symbol_syntax_data = Symbol_Syntax_Data of {
   100   class: string Symtab.table,
   101   instance: unit Symreltab.table,
   102   tyco: Code_Printer.tyco_syntax Symtab.table,
   103   const: Code_Printer.const_syntax Symtab.table
   104 };
   105 
   106 fun make_symbol_syntax_data ((class, instance), (tyco, const)) =
   107   Symbol_Syntax_Data { class = class, instance = instance, tyco = tyco, const = const };
   108 fun map_symbol_syntax_data f (Symbol_Syntax_Data { class, instance, tyco, const }) =
   109   make_symbol_syntax_data (f ((class, instance), (tyco, const)));
   110 fun merge_symbol_syntax_data
   111   (Symbol_Syntax_Data { class = class1, instance = instance1, tyco = tyco1, const = const1 },
   112     Symbol_Syntax_Data { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
   113   make_symbol_syntax_data ( (* FIXME proper merge order!? prefer fst!? *)
   114     (Symtab.join (K snd) (class1, class2),
   115        Symreltab.join (K snd) (instance1, instance2)),
   116     (Symtab.join (K snd) (tyco1, tyco2),
   117        Symtab.join (K snd) (const1, const2))
   118   );
   119 
   120 type serializer = Token.T list
   121   -> {
   122     labelled_name: string -> string,
   123     reserved_syms: string list,
   124     includes: (string * Pretty.T) list,
   125     module_alias: string -> string option,
   126     class_syntax: string -> string option,
   127     tyco_syntax: string -> Code_Printer.tyco_syntax option,
   128     const_syntax: string -> Code_Printer.activated_const_syntax option }
   129   -> Code_Thingol.program
   130   -> serialization;
   131 
   132 datatype description = Fundamental of { serializer: serializer,
   133       literals: literals,
   134       check: { env_var: string, make_destination: Path.T -> Path.T,
   135         make_command: string -> string } }
   136   | Extension of string *
   137       (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   138 
   139 datatype target = Target of {
   140   serial: serial,
   141   description: description,
   142   reserved: string list,
   143   includes: (Pretty.T * string list) Symtab.table,
   144   module_alias: string Symtab.table,
   145   symbol_syntax: symbol_syntax_data
   146 };
   147 
   148 fun make_target ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))) =
   149   Target { serial = serial, description = description, reserved = reserved,
   150     includes = includes, module_alias = module_alias, symbol_syntax = symbol_syntax };
   151 fun map_target f ( Target { serial, description, reserved, includes, module_alias, symbol_syntax } ) =
   152   make_target (f ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))));
   153 fun merge_target strict target (Target { serial = serial1, description = description,
   154   reserved = reserved1, includes = includes1,
   155   module_alias = module_alias1, symbol_syntax = symbol_syntax1 },
   156     Target { serial = serial2, description = _,
   157       reserved = reserved2, includes = includes2,
   158       module_alias = module_alias2, symbol_syntax = symbol_syntax2 }) =
   159   if serial1 = serial2 orelse not strict then
   160     make_target ((serial1, description),
   161       ((merge (op =) (reserved1, reserved2),
   162          (* FIXME proper merge order!? prefer fst!? *)
   163          Symtab.join (K snd) (includes1, includes2)),
   164         (Symtab.join (K snd) (module_alias1, module_alias2),
   165           merge_symbol_syntax_data (symbol_syntax1, symbol_syntax2))
   166     ))
   167   else
   168     error ("Incompatible targets: " ^ quote target);
   169 
   170 fun the_description (Target { description, ... }) = description;
   171 fun the_reserved (Target { reserved, ... }) = reserved;
   172 fun the_includes (Target { includes, ... }) = includes;
   173 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   174 fun the_symbol_syntax (Target { symbol_syntax = Symbol_Syntax_Data x, ... }) = x;
   175 
   176 structure Targets = Theory_Data
   177 (
   178   type T = (target Symtab.table * string list) * int;
   179   val empty = ((Symtab.empty, []), 80);
   180   val extend = I;
   181   fun merge (((target1, exc1), width1), ((target2, exc2), width2)) : T =
   182     ((Symtab.join (merge_target true) (target1, target2),
   183       Library.merge (op =) (exc1, exc2)), Int.max (width1, width2));
   184 );
   185 
   186 val abort_allowed = snd o fst o Targets.get;
   187 
   188 fun assert_target thy target = if Symtab.defined ((fst o fst) (Targets.get thy)) target
   189   then target
   190   else error ("Unknown code target language: " ^ quote target);
   191 
   192 fun put_target (target, seri) thy =
   193   let
   194     val lookup_target = Symtab.lookup ((fst o fst) (Targets.get thy));
   195     val _ = case seri
   196      of Extension (super, _) => if is_some (lookup_target super) then ()
   197           else error ("Unknown code target language: " ^ quote super)
   198       | _ => ();
   199     val overwriting = case (Option.map the_description o lookup_target) target
   200      of NONE => false
   201       | SOME (Extension _) => true
   202       | SOME (Fundamental _) => (case seri
   203          of Extension _ => error ("Will not overwrite existing target " ^ quote target)
   204           | _ => true);
   205     val _ = if overwriting
   206       then warning ("Overwriting existing target " ^ quote target)
   207       else ();
   208   in
   209     thy
   210     |> (Targets.map o apfst o apfst o Symtab.update)
   211           (target, make_target ((serial (), seri), (([], Symtab.empty),
   212             (Symtab.empty, make_symbol_syntax_data ((Symtab.empty, Symreltab.empty),
   213               (Symtab.empty, Symtab.empty))))))
   214   end;
   215 
   216 fun add_target (target, seri) = put_target (target, Fundamental seri);
   217 fun extend_target (target, (super, modify)) =
   218   put_target (target, Extension (super, modify));
   219 
   220 fun map_target_data target f thy =
   221   let
   222     val _ = assert_target thy target;
   223   in
   224     thy
   225     |> (Targets.map o apfst o apfst o Symtab.map_entry target o map_target) f
   226   end;
   227 
   228 fun map_reserved target =
   229   map_target_data target o apsnd o apfst o apfst;
   230 fun map_includes target =
   231   map_target_data target o apsnd o apfst o apsnd;
   232 fun map_module_alias target =
   233   map_target_data target o apsnd o apsnd o apfst;
   234 fun map_symbol_syntax target =
   235   map_target_data target o apsnd o apsnd o apsnd o map_symbol_syntax_data;
   236 
   237 fun set_default_code_width k = (Targets.map o apsnd) (K k);
   238 
   239 
   240 (** serializer usage **)
   241 
   242 (* montage *)
   243 
   244 fun the_fundamental thy =
   245   let
   246     val ((targets, _), _) = Targets.get thy;
   247     fun fundamental target = case Symtab.lookup targets target
   248      of SOME data => (case the_description data
   249          of Fundamental data => data
   250           | Extension (super, _) => fundamental super)
   251       | NONE => error ("Unknown code target language: " ^ quote target);
   252   in fundamental end;
   253 
   254 fun the_literals thy = #literals o the_fundamental thy;
   255 
   256 fun collapse_hierarchy thy =
   257   let
   258     val ((targets, _), _) = Targets.get thy;
   259     fun collapse target =
   260       let
   261         val data = case Symtab.lookup targets target
   262          of SOME data => data
   263           | NONE => error ("Unknown code target language: " ^ quote target);
   264       in case the_description data
   265        of Fundamental _ => (K I, data)
   266         | Extension (super, modify) => let
   267             val (modify', data') = collapse super
   268           in (fn naming => modify' naming #> modify naming, merge_target false target (data', data)) end
   269       end;
   270   in collapse end;
   271 
   272 local
   273 
   274 fun activate_target thy target =
   275   let
   276     val ((_, abortable), default_width) = Targets.get thy;
   277     val (modify, data) = collapse_hierarchy thy target;
   278   in (default_width, abortable, data, modify) end;
   279 
   280 fun activate_syntax lookup_name src_tab = Symtab.empty
   281   |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   282        of SOME name => (SOME name,
   283             Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   284         | NONE => (NONE, tab)) (Symtab.keys src_tab)
   285   |>> map_filter I;
   286 
   287 fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   288   |> fold_map (fn c => fn (tab, naming) =>
   289       case Code_Thingol.lookup_const naming c
   290        of SOME name => let
   291               val (syn, naming') = Code_Printer.activate_const_syntax thy
   292                 literals c (the (Symtab.lookup src_tab c)) naming
   293             in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   294         | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   295   |>> map_filter I;
   296 
   297 fun activate_symbol_syntax thy literals naming
   298     class_syntax instance_syntax tyco_syntax const_syntax =
   299   let
   300     val (names_class, class_syntax') =
   301       activate_syntax (Code_Thingol.lookup_class naming) class_syntax;
   302     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   303       (Symreltab.keys instance_syntax);
   304     val (names_tyco, tyco_syntax') =
   305       activate_syntax (Code_Thingol.lookup_tyco naming) tyco_syntax;
   306     val (names_const, (const_syntax', _)) =
   307       activate_const_syntax thy literals const_syntax naming;
   308   in
   309     (names_class @ names_inst @ names_tyco @ names_const,
   310       (class_syntax', tyco_syntax', const_syntax'))
   311   end;
   312 
   313 fun project_program thy abortable names_hidden names1 program2 =
   314   let
   315     val ctxt = Proof_Context.init_global thy;
   316     val names2 = subtract (op =) names_hidden names1;
   317     val program3 = Graph.restrict (not o member (op =) names_hidden) program2;
   318     val names4 = Graph.all_succs program3 names2;
   319     val empty_funs = filter_out (member (op =) abortable)
   320       (Code_Thingol.empty_funs program3);
   321     val _ =
   322       if null empty_funs then ()
   323       else error ("No code equations for " ^
   324         commas (map (Proof_Context.extern_const ctxt) empty_funs));
   325     val program4 = Graph.restrict (member (op =) names4) program3;
   326   in (names4, program4) end;
   327 
   328 fun prepare_serializer thy abortable serializer literals reserved all_includes
   329     module_alias proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax
   330     module_name args naming proto_program names =
   331   let
   332     val (names_hidden, (class_syntax, tyco_syntax, const_syntax)) =
   333       activate_symbol_syntax thy literals naming
   334         proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax;
   335     val (names_all, program) = project_program thy abortable names_hidden names proto_program;
   336     fun select_include (name, (content, cs)) =
   337       if null cs orelse exists (fn c => case Code_Thingol.lookup_const naming c
   338        of SOME name => member (op =) names_all name
   339         | NONE => false) cs
   340       then SOME (name, content) else NONE;
   341     val includes = map_filter select_include (Symtab.dest all_includes);
   342   in
   343     (serializer args {
   344       labelled_name = Code_Thingol.labelled_name thy proto_program,
   345       reserved_syms = reserved,
   346       includes = includes,
   347       module_alias = if module_name = "" then Symtab.lookup module_alias else K (SOME module_name),
   348       class_syntax = Symtab.lookup class_syntax,
   349       tyco_syntax = Symtab.lookup tyco_syntax,
   350       const_syntax = Symtab.lookup const_syntax },
   351       program)
   352   end;
   353 
   354 fun mount_serializer thy target some_width module_name args naming program names =
   355   let
   356     val (default_width, abortable, data, modify) = activate_target thy target;
   357     val serializer = case the_description data
   358      of Fundamental seri => #serializer seri;
   359     val reserved = the_reserved data;
   360     val module_alias = the_module_alias data
   361     val { class, instance, tyco, const } = the_symbol_syntax data;
   362     val literals = the_literals thy target;
   363     val (prepared_serializer, prepared_program) = prepare_serializer thy
   364       abortable serializer literals reserved (the_includes data) module_alias
   365         class instance tyco const module_name args
   366           naming (modify naming program) names
   367     val width = the_default default_width some_width;
   368   in (fn program => prepared_serializer program width, prepared_program) end;
   369 
   370 fun invoke_serializer thy target some_width module_name args naming program names =
   371   let
   372     val (mounted_serializer, prepared_program) = mount_serializer thy
   373       target some_width module_name args naming program names;
   374   in mounted_serializer prepared_program end;
   375 
   376 fun assert_module_name "" = error ("Empty module name not allowed.")
   377   | assert_module_name module_name = module_name;
   378 
   379 fun using_master_directory thy =
   380   Option.map (Path.append (File.pwd ()) o Path.append (Thy_Load.master_directory thy));
   381 
   382 in
   383 
   384 val generatedN = "Generated_Code";
   385 
   386 fun export_code_for thy some_path target some_width module_name args =
   387   export (using_master_directory thy some_path)
   388   ooo invoke_serializer thy target some_width module_name args;
   389 
   390 fun produce_code_for thy target some_width module_name args =
   391   let
   392     val serializer = invoke_serializer thy target some_width (assert_module_name module_name) args;
   393   in fn naming => fn program => fn names =>
   394     produce (serializer naming program names) |> apsnd (fn deresolve => map deresolve names)
   395   end;
   396 
   397 fun present_code_for thy target some_width module_name args =
   398   let
   399     val serializer = invoke_serializer thy target some_width (assert_module_name module_name) args;
   400   in fn naming => fn program => fn (names, selects) =>
   401     present selects (serializer naming program names)
   402   end;
   403 
   404 fun check_code_for thy target strict args naming program names_cs =
   405   let
   406     val { env_var, make_destination, make_command } =
   407       (#check o the_fundamental thy) target;
   408     fun ext_check p =
   409       let
   410         val destination = make_destination p;
   411         val _ = export (SOME destination) (invoke_serializer thy target (SOME 80)
   412           generatedN args naming program names_cs);
   413         val cmd = make_command generatedN;
   414       in
   415         if Isabelle_System.bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   416         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   417         else ()
   418       end;
   419   in
   420     if getenv env_var = ""
   421     then if strict
   422       then error (env_var ^ " not set; cannot check code for " ^ target)
   423       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   424     else Isabelle_System.with_tmp_dir "Code_Test" ext_check
   425   end;
   426 
   427 fun evaluation mounted_serializer prepared_program consts ((vs, ty), t) =
   428   let
   429     val _ = if Code_Thingol.contains_dict_var t then
   430       error "Term to be evaluated contains free dictionaries" else ();
   431     val v' = singleton (Name.variant_list (map fst vs)) "a";
   432     val vs' = (v', []) :: vs;
   433     val ty' = Code_Thingol.fun_tyco `%% [ITyVar v', ty];
   434     val value_name = "Value.value.value"
   435     val program = prepared_program
   436       |> Graph.new_node (value_name,
   437           Code_Thingol.Fun (Term.dummy_patternN, (((vs', ty'), [(([IVar NONE], t), (NONE, true))]), NONE)))
   438       |> fold (curry (perhaps o try o Graph.add_edge) value_name) consts;
   439     val (program_code, deresolve) = produce (mounted_serializer program);
   440     val value_name' = the (deresolve value_name);
   441   in (program_code, value_name') end;
   442 
   443 fun evaluator thy target naming program consts =
   444   let
   445     val (mounted_serializer, prepared_program) = mount_serializer thy
   446       target NONE generatedN [] naming program consts;
   447   in evaluation mounted_serializer prepared_program consts end;
   448 
   449 end; (* local *)
   450 
   451 
   452 (* code generation *)
   453 
   454 fun transitivly_non_empty_funs thy naming program =
   455   let
   456     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   457     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   458   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   459 
   460 fun read_const_exprs thy cs =
   461   let
   462     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   463     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   464     val names3 = transitivly_non_empty_funs thy naming program;
   465     val cs3 = map_filter (fn (c, name) =>
   466       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   467   in union (op =) cs3 cs1 end;
   468 
   469 fun prep_destination "" = NONE
   470   | prep_destination "-" = NONE
   471   | prep_destination s = SOME (Path.explode s);
   472 
   473 fun export_code thy cs seris =
   474   let
   475     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   476     val _ = map (fn (((target, module_name), some_path), args) =>
   477       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   478   in () end;
   479 
   480 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   481   ((map o apfst o apsnd) prep_destination seris);
   482 
   483 fun produce_code thy cs target some_width some_module_name args =
   484   let
   485     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   486   in produce_code_for thy target some_width some_module_name args naming program names_cs end;
   487 
   488 fun present_code thy cs names_stmt target some_width some_module_name args =
   489   let
   490     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   491   in present_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   492 
   493 fun check_code thy cs seris =
   494   let
   495     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   496     val _ = map (fn ((target, strict), args) =>
   497       check_code_for thy target strict args naming program names_cs) seris;
   498   in () end;
   499 
   500 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   501 
   502 local
   503 
   504 val parse_const_terms = Scan.repeat1 Args.term
   505   >> (fn ts => fn thy => map (Code.check_const thy) ts);
   506 
   507 fun parse_names category parse internalize lookup =
   508   Scan.lift (Args.parens (Args.$$$ category)) |-- Scan.repeat1 parse
   509   >> (fn xs => fn thy => fn naming => map_filter (lookup naming o internalize thy) xs);
   510 
   511 val parse_consts = parse_names "consts" Args.term
   512   Code.check_const Code_Thingol.lookup_const ;
   513 
   514 val parse_types = parse_names "types" (Scan.lift Args.name)
   515   Sign.intern_type Code_Thingol.lookup_tyco;
   516 
   517 val parse_classes = parse_names "classes" (Scan.lift Args.name)
   518   Sign.intern_class Code_Thingol.lookup_class;
   519 
   520 val parse_instances = parse_names "instances" (Scan.lift (Args.name --| Args.$$$ "::" -- Args.name))
   521   (fn thy => fn (raw_tyco, raw_class) => (Sign.intern_class thy raw_class, Sign.intern_type thy raw_tyco))
   522     Code_Thingol.lookup_instance;
   523 
   524 in
   525 
   526 val antiq_setup =
   527   Thy_Output.antiquotation @{binding code_stmts}
   528     (parse_const_terms --
   529       Scan.repeat (parse_consts || parse_types || parse_classes || parse_instances)
   530       -- Scan.lift (Args.parens (Args.name -- Scan.option Parse.int)))
   531     (fn {context = ctxt, ...} => fn ((mk_cs, mk_stmtss), (target, some_width)) =>
   532       let val thy = Proof_Context.theory_of ctxt in
   533         present_code thy (mk_cs thy)
   534           (fn naming => maps (fn f => f thy naming) mk_stmtss)
   535           target some_width "Example" []
   536       end);
   537 
   538 end;
   539 
   540 
   541 (** serializer configuration **)
   542 
   543 (* data access *)
   544 
   545 fun cert_class thy class =
   546   let
   547     val _ = Axclass.get_info thy class;
   548   in class end;
   549 
   550 fun read_class thy = cert_class thy o Sign.intern_class thy;
   551 
   552 fun cert_tyco thy tyco =
   553   let
   554     val _ = if Sign.declared_tyname thy tyco then ()
   555       else error ("No such type constructor: " ^ quote tyco);
   556   in tyco end;
   557 
   558 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   559 
   560 fun cert_inst thy (class, tyco) =
   561   (cert_class thy class, cert_tyco thy tyco);
   562 
   563 fun read_inst thy (raw_tyco, raw_class) =
   564   (read_class thy raw_class, read_tyco thy raw_tyco);
   565 
   566 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   567   let
   568     val x = prep_x thy raw_x;
   569     val change = case some_raw_syn
   570      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   571       | NONE => del x;
   572   in (map_symbol_syntax target o mapp) change thy end;
   573 
   574 fun gen_add_class_syntax prep_class =
   575   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   576 
   577 fun gen_add_instance_syntax prep_inst =
   578   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   579 
   580 fun gen_add_tyco_syntax prep_tyco =
   581   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   582     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   583       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   584       else syn);
   585 
   586 fun gen_add_const_syntax prep_const =
   587   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   588     (fn thy => fn c => fn syn =>
   589       if Code_Printer.requires_args syn > Code.args_number thy c
   590       then error ("Too many arguments in syntax for constant " ^ quote c)
   591       else syn);
   592 
   593 fun add_reserved target sym thy =
   594   let
   595     val (_, data) = collapse_hierarchy thy target;
   596     val _ = if member (op =) (the_reserved data) sym
   597       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   598       else ();
   599   in
   600     thy
   601     |> map_reserved target (insert (op =) sym)
   602   end;
   603 
   604 fun gen_add_include read_const target args thy =
   605   let
   606     fun add (name, SOME (content, raw_cs)) incls =
   607           let
   608             val _ = if Symtab.defined incls name
   609               then warning ("Overwriting existing include " ^ name)
   610               else ();
   611             val cs = map (read_const thy) raw_cs;
   612           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   613       | add (name, NONE) incls = Symtab.delete name incls;
   614   in map_includes target (add args) thy end;
   615 
   616 val add_include = gen_add_include (K I);
   617 val add_include_cmd = gen_add_include Code.read_const;
   618 
   619 fun add_module_alias target (thyname, "") =
   620       map_module_alias target (Symtab.delete thyname)
   621   | add_module_alias target (thyname, modlname) =
   622       let
   623         val xs = Long_Name.explode modlname;
   624         val xs' = map (Name.desymbolize true) xs;
   625       in if xs' = xs
   626         then map_module_alias target (Symtab.update (thyname, modlname))
   627         else error ("Invalid module name: " ^ quote modlname ^ "\n"
   628           ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   629       end;
   630 
   631 fun gen_allow_abort prep_const raw_c thy =
   632   let
   633     val c = prep_const thy raw_c;
   634   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   635 
   636 
   637 (* concrete syntax *)
   638 
   639 local
   640 
   641 fun zip_list (x :: xs) f g =
   642   f
   643   :|-- (fn y =>
   644     fold_map (fn x => g |-- f >> pair x) xs
   645     :|-- (fn xys => pair ((x, y) :: xys)));
   646 
   647 fun process_multi_syntax parse_thing parse_syntax change =
   648   (Parse.and_list1 parse_thing
   649   :|-- (fn things => Scan.repeat1 (@{keyword "("} |-- Parse.name --
   650         (zip_list things (Scan.option parse_syntax) @{keyword "and"}) --| @{keyword ")"})))
   651   >> (Toplevel.theory oo fold)
   652     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   653 
   654 in
   655 
   656 val add_class_syntax = gen_add_class_syntax cert_class;
   657 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   658 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   659 val add_const_syntax = gen_add_const_syntax (K I);
   660 val allow_abort = gen_allow_abort (K I);
   661 val add_reserved = add_reserved;
   662 val add_include = add_include;
   663 
   664 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   665 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   666 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   667 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   668 val allow_abort_cmd = gen_allow_abort Code.read_const;
   669 
   670 fun parse_args f args =
   671   case Scan.read Token.stopper f args
   672    of SOME x => x
   673     | NONE => error "Bad serializer arguments";
   674 
   675 
   676 (** Isar setup **)
   677 
   678 val code_expr_argsP = Scan.optional (@{keyword "("} |-- Args.parse --| @{keyword ")"}) [];
   679 
   680 val code_exprP =
   681   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   682     ((@{keyword "checking"} |-- Scan.repeat (Parse.name
   683       -- ((@{keyword "?"} |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   684       >> (fn seris => check_code_cmd raw_cs seris)
   685     || Scan.repeat (@{keyword "in"} |-- Parse.name
   686        -- Scan.optional (@{keyword "module_name"} |-- Parse.name) ""
   687        -- Scan.optional (@{keyword "file"} |-- Parse.name) ""
   688        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   689 
   690 val _ =
   691   Outer_Syntax.command @{command_spec "code_class"} "define code syntax for class"
   692     (process_multi_syntax Parse.xname Parse.string
   693       add_class_syntax_cmd);
   694 
   695 val _ =
   696   Outer_Syntax.command @{command_spec "code_instance"} "define code syntax for instance"
   697     (process_multi_syntax (Parse.xname --| @{keyword "::"} -- Parse.xname) (Parse.minus >> K ())
   698       add_instance_syntax_cmd);
   699 
   700 val _ =
   701   Outer_Syntax.command @{command_spec "code_type"} "define code syntax for type constructor"
   702     (process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax add_tyco_syntax_cmd);
   703 
   704 val _ =
   705   Outer_Syntax.command @{command_spec "code_const"} "define code syntax for constant"
   706     (process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax add_const_syntax_cmd);
   707 
   708 val _ =
   709   Outer_Syntax.command @{command_spec "code_reserved"}
   710     "declare words as reserved for target language"
   711     (Parse.name -- Scan.repeat1 Parse.name
   712       >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds));
   713 
   714 val _ =
   715   Outer_Syntax.command @{command_spec "code_include"}
   716     "declare piece of code to be included in generated code"
   717     (Parse.name -- Parse.name -- (Parse.text :|--
   718       (fn "-" => Scan.succeed NONE
   719         | s => Scan.optional (@{keyword "attach"} |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   720       >> (fn ((target, name), content_consts) =>
   721           (Toplevel.theory o add_include_cmd target) (name, content_consts)));
   722 
   723 val _ =
   724   Outer_Syntax.command @{command_spec "code_modulename"} "alias module to other name"
   725     (Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   726       >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames));
   727 
   728 val _ =
   729   Outer_Syntax.command @{command_spec "code_abort"}
   730     "permit constant to be implemented as program abort"
   731     (Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd));
   732 
   733 val _ =
   734   Outer_Syntax.command @{command_spec "export_code"} "generate executable code for constants"
   735     (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   736 
   737 end; (*local*)
   738 
   739 
   740 (** external entrance point -- for codegen tool **)
   741 
   742 fun codegen_tool thyname cmd_expr =
   743   let
   744     val thy = Thy_Info.get_theory thyname;
   745     val parse = Scan.read Token.stopper (Parse.!!! code_exprP) o
   746       (filter Token.is_proper o Outer_Syntax.scan Position.none);
   747   in case parse cmd_expr
   748    of SOME f => (writeln "Now generating code..."; f thy)
   749     | NONE => error ("Bad directive " ^ quote cmd_expr)
   750   end;
   751 
   752 
   753 (** theory setup **)
   754 
   755 val setup = antiq_setup;
   756 
   757 end; (*struct*)