src/Tools/Code/code_target.ML
author haftmann
Thu Sep 23 10:37:28 2010 +0200 (2010-09-23)
changeset 39646 64fdbee67135
parent 39484 505f95975a5a
child 39659 07549694e2f1
permissions -rw-r--r--
improved and tuned external codegen tool
     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 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 thy target =
   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 _ => (K I, data)
   254         | Extension (super, modify) => let
   255             val (modify', data') = collapse_hierarchy super
   256           in (fn naming => modify' naming #> 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) 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 all_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     fun select_include (name, (content, cs)) =
   315       if null cs orelse exists (fn c => case Code_Thingol.lookup_const naming c
   316        of SOME name => member (op =) names_all name
   317         | NONE => false) cs
   318       then SOME (name, content) else NONE;
   319     val includes = map_filter select_include (Symtab.dest all_includes);
   320   in
   321     serializer args {
   322       labelled_name = Code_Thingol.labelled_name thy proto_program,
   323       reserved_syms = reserved,
   324       includes = includes,
   325       module_alias = if module_name = "" then Symtab.lookup module_alias else K (SOME module_name),
   326       class_syntax = Symtab.lookup class_syntax,
   327       tyco_syntax = Symtab.lookup tyco_syntax,
   328       const_syntax = Symtab.lookup const_syntax,
   329       program = program }
   330   end;
   331 
   332 fun mount_serializer thy target some_width module_name args =
   333   let
   334     val (default_width, abortable, data, modify) = activate_target thy target;
   335     val serializer = case the_description data
   336      of Fundamental seri => #serializer seri;
   337     val reserved = the_reserved data;
   338     val module_alias = the_module_alias data 
   339     val { class, instance, tyco, const } = the_symbol_syntax data;
   340     val literals = the_literals thy target;
   341     val width = the_default default_width some_width;
   342   in fn naming => fn program => fn names =>
   343     invoke_serializer thy abortable serializer literals reserved
   344       (the_includes data) module_alias class instance tyco const module_name args
   345         naming (modify naming program) names width
   346   end;
   347 
   348 fun assert_module_name "" = error ("Empty module name not allowed.")
   349   | assert_module_name module_name = module_name;
   350 
   351 in
   352 
   353 fun export_code_for thy some_path target some_width module_name args =
   354   export some_path ooo mount_serializer thy target some_width module_name args;
   355 
   356 fun produce_code_for thy target some_width module_name args =
   357   let
   358     val serializer = mount_serializer thy target some_width (assert_module_name module_name) args;
   359   in fn naming => fn program => fn names =>
   360     produce (serializer naming program names) |> apsnd (fn deresolve => map deresolve names)
   361   end;
   362 
   363 fun present_code_for thy target some_width module_name args =
   364   let
   365     val serializer = mount_serializer thy target some_width (assert_module_name module_name) args;
   366   in fn naming => fn program => fn (names, selects) =>
   367     present selects (serializer naming program names)
   368   end;
   369 
   370 fun check_code_for thy target strict args naming program names_cs =
   371   let
   372     val module_name = "Code";
   373     val { env_var, make_destination, make_command } =
   374       (#check o the_fundamental thy) target;
   375     val env_param = getenv env_var;
   376     fun ext_check env_param p =
   377       let 
   378         val destination = make_destination p;
   379         val _ = export (SOME destination) (mount_serializer thy target (SOME 80)
   380           module_name args naming program names_cs);
   381         val cmd = make_command env_param module_name;
   382       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   383         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   384         else ()
   385       end;
   386   in if env_param = ""
   387     then if strict
   388       then error (env_var ^ " not set; cannot check code for " ^ target)
   389       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   390     else Cache_IO.with_tmp_dir "Code_Test" (ext_check env_param)
   391   end;
   392 
   393 end; (* local *)
   394 
   395 
   396 (* code generation *)
   397 
   398 fun transitivly_non_empty_funs thy naming program =
   399   let
   400     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   401     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   402   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   403 
   404 fun read_const_exprs thy cs =
   405   let
   406     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   407     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   408     val names3 = transitivly_non_empty_funs thy naming program;
   409     val cs3 = map_filter (fn (c, name) =>
   410       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   411   in union (op =) cs3 cs1 end;
   412 
   413 fun prep_destination "" = NONE
   414   | prep_destination "-" = NONE
   415   | prep_destination s = SOME (Path.explode s);
   416 
   417 fun export_code thy cs seris =
   418   let
   419     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   420     val _ = map (fn (((target, module_name), some_path), args) =>
   421       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   422   in () end;
   423 
   424 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   425   ((map o apfst o apsnd) prep_destination seris);
   426 
   427 fun produce_code thy cs target some_width some_module_name args =
   428   let
   429     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   430   in produce_code_for thy target some_width some_module_name args naming program names_cs end;
   431 
   432 fun present_code thy cs names_stmt target some_width some_module_name args =
   433   let
   434     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   435   in present_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   436 
   437 fun check_code thy cs seris =
   438   let
   439     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   440     val _ = map (fn ((target, strict), args) =>
   441       check_code_for thy target strict args naming program names_cs) seris;
   442   in () end;
   443 
   444 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   445 
   446 local
   447 
   448 val parse_const_terms = Scan.repeat1 Args.term
   449   >> (fn ts => fn thy => map (Code.check_const thy) ts);
   450 
   451 fun parse_names category parse internalize lookup =
   452   Scan.lift (Args.parens (Args.$$$ category)) |-- Scan.repeat1 parse
   453   >> (fn xs => fn thy => fn naming => map_filter (lookup naming o internalize thy) xs);
   454   
   455 val parse_consts = parse_names "consts" Args.term
   456   Code.check_const Code_Thingol.lookup_const ;
   457 
   458 val parse_types = parse_names "types" (Scan.lift Args.name)
   459   Sign.intern_type Code_Thingol.lookup_tyco;
   460 
   461 val parse_classes = parse_names "classes" (Scan.lift Args.name)
   462   Sign.intern_class Code_Thingol.lookup_class;
   463 
   464 val parse_instances = parse_names "instances" (Scan.lift (Args.name --| Args.$$$ "::" -- Args.name))
   465   (fn thy => fn (raw_tyco, raw_class) => (Sign.intern_class thy raw_class, Sign.intern_type thy raw_tyco))
   466     Code_Thingol.lookup_instance;
   467 
   468 in
   469 
   470 val _ = Thy_Output.antiquotation "code_stmts"
   471   (parse_const_terms -- Scan.repeat (parse_consts || parse_types || parse_classes || parse_instances)
   472     -- Scan.lift (Args.parens (Args.name -- Scan.option Parse.int)))
   473   (fn {context = ctxt, ...} => fn ((mk_cs, mk_stmtss), (target, some_width)) =>
   474     let val thy = ProofContext.theory_of ctxt in
   475       present_code thy (mk_cs thy)
   476         (fn naming => maps (fn f => f thy naming) mk_stmtss)
   477         target some_width "Example" []
   478       |> Latex.output_typewriter
   479     end);
   480 
   481 end;
   482 
   483 
   484 (** serializer configuration **)
   485 
   486 (* data access *)
   487 
   488 fun cert_class thy class =
   489   let
   490     val _ = AxClass.get_info thy class;
   491   in class end;
   492 
   493 fun read_class thy = cert_class thy o Sign.intern_class thy;
   494 
   495 fun cert_tyco thy tyco =
   496   let
   497     val _ = if Sign.declared_tyname thy tyco then ()
   498       else error ("No such type constructor: " ^ quote tyco);
   499   in tyco end;
   500 
   501 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   502 
   503 fun cert_inst thy (class, tyco) =
   504   (cert_class thy class, cert_tyco thy tyco);
   505 
   506 fun read_inst thy (raw_tyco, raw_class) =
   507   (read_class thy raw_class, read_tyco thy raw_tyco);
   508 
   509 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   510   let
   511     val x = prep_x thy raw_x;
   512     val change = case some_raw_syn
   513      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   514       | NONE => del x;
   515   in (map_symbol_syntax target o mapp) change thy end;
   516 
   517 fun gen_add_class_syntax prep_class =
   518   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   519 
   520 fun gen_add_instance_syntax prep_inst =
   521   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   522 
   523 fun gen_add_tyco_syntax prep_tyco =
   524   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   525     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   526       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   527       else syn);
   528 
   529 fun gen_add_const_syntax prep_const =
   530   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   531     (fn thy => fn c => fn syn =>
   532       if Code_Printer.requires_args syn > Code.args_number thy c
   533       then error ("Too many arguments in syntax for constant " ^ quote c)
   534       else syn);
   535 
   536 fun add_reserved target =
   537   let
   538     fun add sym syms = if member (op =) syms sym
   539       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   540       else insert (op =) sym syms
   541   in map_reserved target o add end;
   542 
   543 fun gen_add_include read_const target args thy =
   544   let
   545     fun add (name, SOME (content, raw_cs)) incls =
   546           let
   547             val _ = if Symtab.defined incls name
   548               then warning ("Overwriting existing include " ^ name)
   549               else ();
   550             val cs = map (read_const thy) raw_cs;
   551           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   552       | add (name, NONE) incls = Symtab.delete name incls;
   553   in map_includes target (add args) thy end;
   554 
   555 val add_include = gen_add_include (K I);
   556 val add_include_cmd = gen_add_include Code.read_const;
   557 
   558 fun add_module_alias target (thyname, "") =
   559       map_module_alias target (Symtab.delete thyname)
   560   | add_module_alias target (thyname, modlname) =
   561       let
   562         val xs = Long_Name.explode modlname;
   563         val xs' = map (Name.desymbolize true) xs;
   564       in if xs' = xs
   565         then map_module_alias target (Symtab.update (thyname, modlname))
   566         else error ("Invalid module name: " ^ quote modlname ^ "\n"
   567           ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   568       end;
   569 
   570 fun gen_allow_abort prep_const raw_c thy =
   571   let
   572     val c = prep_const thy raw_c;
   573   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   574 
   575 
   576 (* concrete syntax *)
   577 
   578 local
   579 
   580 fun zip_list (x::xs) f g =
   581   f
   582   :|-- (fn y =>
   583     fold_map (fn x => g |-- f >> pair x) xs
   584     :|-- (fn xys => pair ((x, y) :: xys)));
   585 
   586 fun process_multi_syntax parse_thing parse_syntax change =
   587   (Parse.and_list1 parse_thing
   588   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   589         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   590   >> (Toplevel.theory oo fold)
   591     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   592 
   593 in
   594 
   595 val add_class_syntax = gen_add_class_syntax cert_class;
   596 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   597 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   598 val add_const_syntax = gen_add_const_syntax (K I);
   599 val allow_abort = gen_allow_abort (K I);
   600 val add_reserved = add_reserved;
   601 val add_include = add_include;
   602 
   603 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   604 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   605 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   606 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   607 val allow_abort_cmd = gen_allow_abort Code.read_const;
   608 
   609 fun parse_args f args =
   610   case Scan.read Token.stopper f args
   611    of SOME x => x
   612     | NONE => error "Bad serializer arguments";
   613 
   614 
   615 (** Isar setup **)
   616 
   617 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   618 
   619 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   620 
   621 val code_exprP =
   622   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   623     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   624       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   625       >> (fn seris => check_code_cmd raw_cs seris)
   626     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   627        -- Scan.optional (Parse.$$$ module_nameK |-- Parse.name) ""
   628        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   629        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   630 
   631 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   632 
   633 val _ =
   634   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   635     process_multi_syntax Parse.xname (Scan.option Parse.string)
   636     add_class_syntax_cmd);
   637 
   638 val _ =
   639   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   640     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   641       (Scan.option (Parse.minus >> K ()))
   642     add_instance_syntax_cmd);
   643 
   644 val _ =
   645   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   646     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   647     add_tyco_syntax_cmd);
   648 
   649 val _ =
   650   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   651     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   652     add_const_syntax_cmd);
   653 
   654 val _ =
   655   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   656     Keyword.thy_decl (
   657     Parse.name -- Scan.repeat1 Parse.name
   658     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   659   );
   660 
   661 val _ =
   662   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   663     Keyword.thy_decl (
   664     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   665       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   666     >> (fn ((target, name), content_consts) =>
   667         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   668   );
   669 
   670 val _ =
   671   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   672     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   673     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   674   );
   675 
   676 val _ =
   677   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   678     Keyword.thy_decl (
   679     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   680   );
   681 
   682 val _ =
   683   Outer_Syntax.command "export_code" "generate executable code for constants"
   684     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   685 
   686 end; (*local*)
   687 
   688 
   689 (** external entrance point -- for codegen tool **)
   690 
   691 fun codegen_tool thyname qnd cmd_expr =
   692   let
   693     val thy = Thy_Info.get_theory thyname;
   694     val _ = quick_and_dirty := qnd;
   695     val parse = Scan.read Token.stopper (Parse.!!! code_exprP) o
   696       (filter Token.is_proper o Outer_Syntax.scan Position.none);
   697   in case parse cmd_expr
   698    of SOME f => (writeln "Now generating code..."; f thy)
   699     | NONE => error ("Bad directive " ^ quote cmd_expr)
   700   end;
   701 
   702 end; (*struct*)