src/Tools/Code/code_target.ML
author wenzelm
Mon Dec 20 14:44:00 2010 +0100 (2010-12-20)
changeset 41307 bb8468ae414e
parent 39817 5228c6b20273
child 41342 3519e0dd8f75
permissions -rw-r--r--
slightly more standard Isabelle_System.with_tmp_file/with_tmp_dir (cf. Scala version);
more robust rm_tree -- somewhat dangerous and not exported;
tuned;
     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*) -> 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) =
    77       (output width some_path content; NONE)
    78   | serialization _ string content width Produce =
    79       string [] width content |> SOME
    80   | serialization _ string content width (Present stmt_names) =
    81      string stmt_names width content
    82      |> apfst (Pretty.output (SOME width) o Pretty.str)
    83      |> SOME;
    84 
    85 fun export some_path f = (f (Export some_path); ());
    86 fun produce f = the (f Produce);
    87 fun present stmt_names f = fst (the (f (Present stmt_names)));
    88 
    89 
    90 (** theory data **)
    91 
    92 datatype symbol_syntax_data = Symbol_Syntax_Data of {
    93   class: string Symtab.table,
    94   instance: unit Symreltab.table,
    95   tyco: Code_Printer.tyco_syntax Symtab.table,
    96   const: Code_Printer.const_syntax Symtab.table
    97 };
    98 
    99 fun make_symbol_syntax_data ((class, instance), (tyco, const)) =
   100   Symbol_Syntax_Data { class = class, instance = instance, tyco = tyco, const = const };
   101 fun map_symbol_syntax_data f (Symbol_Syntax_Data { class, instance, tyco, const }) =
   102   make_symbol_syntax_data (f ((class, instance), (tyco, const)));
   103 fun merge_symbol_syntax_data
   104   (Symbol_Syntax_Data { class = class1, instance = instance1, tyco = tyco1, const = const1 },
   105     Symbol_Syntax_Data { class = class2, instance = instance2, tyco = tyco2, const = const2 }) =
   106   make_symbol_syntax_data (
   107     (Symtab.join (K snd) (class1, class2),
   108        Symreltab.join (K snd) (instance1, instance2)),
   109     (Symtab.join (K snd) (tyco1, tyco2),
   110        Symtab.join (K snd) (const1, const2))
   111   );
   112 
   113 type serializer = Token.T list
   114   -> {
   115     labelled_name: string -> string,
   116     reserved_syms: string list,
   117     includes: (string * Pretty.T) list,
   118     module_alias: string -> string option,
   119     class_syntax: string -> string option,
   120     tyco_syntax: string -> Code_Printer.tyco_syntax option,
   121     const_syntax: string -> Code_Printer.activated_const_syntax option,
   122     program: Code_Thingol.program }
   123   -> serialization;
   124 
   125 datatype description = Fundamental of { serializer: serializer,
   126       literals: literals,
   127       check: { env_var: string, make_destination: Path.T -> Path.T,
   128         make_command: string -> string -> string } }
   129   | Extension of string *
   130       (Code_Thingol.naming -> Code_Thingol.program -> Code_Thingol.program);
   131 
   132 datatype target = Target of {
   133   serial: serial,
   134   description: description,
   135   reserved: string list,
   136   includes: (Pretty.T * string list) Symtab.table,
   137   module_alias: string Symtab.table,
   138   symbol_syntax: symbol_syntax_data
   139 };
   140 
   141 fun make_target ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))) =
   142   Target { serial = serial, description = description, reserved = reserved, 
   143     includes = includes, module_alias = module_alias, symbol_syntax = symbol_syntax };
   144 fun map_target f ( Target { serial, description, reserved, includes, module_alias, symbol_syntax } ) =
   145   make_target (f ((serial, description), ((reserved, includes), (module_alias, symbol_syntax))));
   146 fun merge_target strict target (Target { serial = serial1, description = description,
   147   reserved = reserved1, includes = includes1,
   148   module_alias = module_alias1, symbol_syntax = symbol_syntax1 },
   149     Target { serial = serial2, description = _,
   150       reserved = reserved2, includes = includes2,
   151       module_alias = module_alias2, symbol_syntax = symbol_syntax2 }) =
   152   if serial1 = serial2 orelse not strict then
   153     make_target ((serial1, description),
   154       ((merge (op =) (reserved1, reserved2), Symtab.join (K snd) (includes1, includes2)),
   155         (Symtab.join (K snd) (module_alias1, module_alias2),
   156           merge_symbol_syntax_data (symbol_syntax1, symbol_syntax2))
   157     ))
   158   else
   159     error ("Incompatible targets: " ^ quote target);
   160 
   161 fun the_description (Target { description, ... }) = description;
   162 fun the_reserved (Target { reserved, ... }) = reserved;
   163 fun the_includes (Target { includes, ... }) = includes;
   164 fun the_module_alias (Target { module_alias , ... }) = module_alias;
   165 fun the_symbol_syntax (Target { symbol_syntax = Symbol_Syntax_Data x, ... }) = x;
   166 
   167 structure Targets = Theory_Data
   168 (
   169   type T = (target Symtab.table * string list) * int;
   170   val empty = ((Symtab.empty, []), 80);
   171   val extend = I;
   172   fun merge (((target1, exc1), width1), ((target2, exc2), width2)) : T =
   173     ((Symtab.join (merge_target true) (target1, target2),
   174       Library.merge (op =) (exc1, exc2)), Int.max (width1, width2));
   175 );
   176 
   177 val abort_allowed = snd o fst o Targets.get;
   178 
   179 fun assert_target thy target = if Symtab.defined ((fst o fst) (Targets.get thy)) target
   180   then target
   181   else error ("Unknown code target language: " ^ quote target);
   182 
   183 fun put_target (target, seri) thy =
   184   let
   185     val lookup_target = Symtab.lookup ((fst o fst) (Targets.get thy));
   186     val _ = case seri
   187      of Extension (super, _) => if is_some (lookup_target super) then ()
   188           else error ("Unknown code target language: " ^ quote super)
   189       | _ => ();
   190     val overwriting = case (Option.map the_description o lookup_target) target
   191      of NONE => false
   192       | SOME (Extension _) => true
   193       | SOME (Fundamental _) => (case seri
   194          of Extension _ => error ("Will not overwrite existing target " ^ quote target)
   195           | _ => true);
   196     val _ = if overwriting
   197       then warning ("Overwriting existing target " ^ quote target)
   198       else (); 
   199   in
   200     thy
   201     |> (Targets.map o apfst o apfst o Symtab.update)
   202           (target, make_target ((serial (), seri), (([], Symtab.empty),
   203             (Symtab.empty, make_symbol_syntax_data ((Symtab.empty, Symreltab.empty),
   204               (Symtab.empty, Symtab.empty))))))
   205   end;
   206 
   207 fun add_target (target, seri) = put_target (target, Fundamental seri);
   208 fun extend_target (target, (super, modify)) =
   209   put_target (target, Extension (super, modify));
   210 
   211 fun map_target_data target f thy =
   212   let
   213     val _ = assert_target thy target;
   214   in
   215     thy
   216     |> (Targets.map o apfst o apfst o Symtab.map_entry target o map_target) f
   217   end;
   218 
   219 fun map_reserved target =
   220   map_target_data target o apsnd o apfst o apfst;
   221 fun map_includes target =
   222   map_target_data target o apsnd o apfst o apsnd;
   223 fun map_module_alias target =
   224   map_target_data target o apsnd o apsnd o apfst;
   225 fun map_symbol_syntax target =
   226   map_target_data target o apsnd o apsnd o apsnd o map_symbol_syntax_data;
   227 
   228 fun set_default_code_width k = (Targets.map o apsnd) (K k);
   229 
   230 
   231 (** serializer usage **)
   232 
   233 (* montage *)
   234 
   235 fun the_fundamental thy =
   236   let
   237     val ((targets, _), _) = Targets.get thy;
   238     fun fundamental target = case Symtab.lookup targets target
   239      of SOME data => (case the_description data
   240          of Fundamental data => data
   241           | Extension (super, _) => fundamental super)
   242       | NONE => error ("Unknown code target language: " ^ quote target);
   243   in fundamental end;
   244 
   245 fun the_literals thy = #literals o the_fundamental thy;
   246 
   247 fun collapse_hierarchy thy =
   248   let
   249     val ((targets, _), _) = Targets.get thy;
   250     fun collapse target = 
   251       let
   252         val data = case Symtab.lookup targets target
   253          of SOME data => data
   254           | NONE => error ("Unknown code target language: " ^ quote target);
   255       in case the_description data
   256        of Fundamental _ => (K I, data)
   257         | Extension (super, modify) => let
   258             val (modify', data') = collapse super
   259           in (fn naming => modify' naming #> modify naming, merge_target false target (data', data)) end
   260       end;
   261   in collapse end;
   262 
   263 local
   264 
   265 fun activate_target thy target =
   266   let
   267     val ((targets, abortable), default_width) = Targets.get thy;
   268     val (modify, data) = collapse_hierarchy thy target;
   269   in (default_width, abortable, data, modify) end;
   270 
   271 fun activate_syntax lookup_name src_tab = Symtab.empty
   272   |> fold_map (fn thing_identifier => fn tab => case lookup_name thing_identifier
   273        of SOME name => (SOME name,
   274             Symtab.update_new (name, the (Symtab.lookup src_tab thing_identifier)) tab)
   275         | NONE => (NONE, tab)) (Symtab.keys src_tab)
   276   |>> map_filter I;
   277 
   278 fun activate_const_syntax thy literals src_tab naming = (Symtab.empty, naming)
   279   |> fold_map (fn c => fn (tab, naming) =>
   280       case Code_Thingol.lookup_const naming c
   281        of SOME name => let
   282               val (syn, naming') = Code_Printer.activate_const_syntax thy
   283                 literals c (the (Symtab.lookup src_tab c)) naming
   284             in (SOME name, (Symtab.update_new (name, syn) tab, naming')) end
   285         | NONE => (NONE, (tab, naming))) (Symtab.keys src_tab)
   286   |>> map_filter I;
   287 
   288 fun activate_symbol_syntax thy literals naming
   289     class_syntax instance_syntax tyco_syntax const_syntax =
   290   let
   291     val (names_class, class_syntax') =
   292       activate_syntax (Code_Thingol.lookup_class naming) class_syntax;
   293     val names_inst = map_filter (Code_Thingol.lookup_instance naming)
   294       (Symreltab.keys instance_syntax);
   295     val (names_tyco, tyco_syntax') =
   296       activate_syntax (Code_Thingol.lookup_tyco naming) tyco_syntax;
   297     val (names_const, (const_syntax', _)) =
   298       activate_const_syntax thy literals const_syntax naming;
   299   in
   300     (names_class @ names_inst @ names_tyco @ names_const,
   301       (class_syntax', tyco_syntax', const_syntax'))
   302   end;
   303 
   304 fun project_program thy abortable names_hidden names1 program2 =
   305   let
   306     val names2 = subtract (op =) names_hidden names1;
   307     val program3 = Graph.subgraph (not o member (op =) names_hidden) program2;
   308     val names4 = Graph.all_succs program3 names2;
   309     val empty_funs = filter_out (member (op =) abortable)
   310       (Code_Thingol.empty_funs program3);
   311     val _ = if null empty_funs then () else error ("No code equations for "
   312       ^ commas (map (Sign.extern_const thy) empty_funs));
   313     val program4 = Graph.subgraph (member (op =) names4) program3;
   314   in (names4, program4) end;
   315 
   316 fun invoke_serializer thy abortable serializer literals reserved all_includes
   317     module_alias proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax
   318     module_name args naming proto_program names =
   319   let
   320     val (names_hidden, (class_syntax, tyco_syntax, const_syntax)) =
   321       activate_symbol_syntax thy literals naming
   322         proto_class_syntax proto_instance_syntax proto_tyco_syntax proto_const_syntax;
   323     val (names_all, program) = project_program thy abortable names_hidden names proto_program;
   324     fun select_include (name, (content, cs)) =
   325       if null cs orelse exists (fn c => case Code_Thingol.lookup_const naming c
   326        of SOME name => member (op =) names_all name
   327         | NONE => false) cs
   328       then SOME (name, content) else NONE;
   329     val includes = map_filter select_include (Symtab.dest all_includes);
   330   in
   331     serializer args {
   332       labelled_name = Code_Thingol.labelled_name thy proto_program,
   333       reserved_syms = reserved,
   334       includes = includes,
   335       module_alias = if module_name = "" then Symtab.lookup module_alias else K (SOME module_name),
   336       class_syntax = Symtab.lookup class_syntax,
   337       tyco_syntax = Symtab.lookup tyco_syntax,
   338       const_syntax = Symtab.lookup const_syntax,
   339       program = program }
   340   end;
   341 
   342 fun mount_serializer thy target some_width module_name args =
   343   let
   344     val (default_width, abortable, data, modify) = activate_target thy target;
   345     val serializer = case the_description data
   346      of Fundamental seri => #serializer seri;
   347     val reserved = the_reserved data;
   348     val module_alias = the_module_alias data 
   349     val { class, instance, tyco, const } = the_symbol_syntax data;
   350     val literals = the_literals thy target;
   351     val width = the_default default_width some_width;
   352   in fn naming => fn program => fn names =>
   353     invoke_serializer thy abortable serializer literals reserved
   354       (the_includes data) module_alias class instance tyco const module_name args
   355         naming (modify naming program) names width
   356   end;
   357 
   358 fun assert_module_name "" = error ("Empty module name not allowed.")
   359   | assert_module_name module_name = module_name;
   360 
   361 in
   362 
   363 fun export_code_for thy some_path target some_width module_name args =
   364   export some_path ooo mount_serializer thy target some_width module_name args;
   365 
   366 fun produce_code_for thy target some_width module_name args =
   367   let
   368     val serializer = mount_serializer thy target some_width (assert_module_name module_name) args;
   369   in fn naming => fn program => fn names =>
   370     produce (serializer naming program names) |> apsnd (fn deresolve => map deresolve names)
   371   end;
   372 
   373 fun present_code_for thy target some_width module_name args =
   374   let
   375     val serializer = mount_serializer thy target some_width (assert_module_name module_name) args;
   376   in fn naming => fn program => fn (names, selects) =>
   377     present selects (serializer naming program names)
   378   end;
   379 
   380 fun check_code_for thy target strict args naming program names_cs =
   381   let
   382     val module_name = "Code";
   383     val { env_var, make_destination, make_command } =
   384       (#check o the_fundamental thy) target;
   385     val env_param = getenv env_var;
   386     fun ext_check env_param p =
   387       let 
   388         val destination = make_destination p;
   389         val _ = export (SOME destination) (mount_serializer thy target (SOME 80)
   390           module_name args naming program names_cs);
   391         val cmd = make_command env_param module_name;
   392       in if bash ("cd " ^ File.shell_path p ^ " && " ^ cmd ^ " 2>&1") <> 0
   393         then error ("Code check failed for " ^ target ^ ": " ^ cmd)
   394         else ()
   395       end;
   396   in if env_param = ""
   397     then if strict
   398       then error (env_var ^ " not set; cannot check code for " ^ target)
   399       else warning (env_var ^ " not set; skipped checking code for " ^ target)
   400     else Isabelle_System.with_tmp_dir "Code_Test" (ext_check env_param)
   401   end;
   402 
   403 end; (* local *)
   404 
   405 
   406 (* code generation *)
   407 
   408 fun transitivly_non_empty_funs thy naming program =
   409   let
   410     val cs = subtract (op =) (abort_allowed thy) (Code_Thingol.empty_funs program);
   411     val names = map_filter (Code_Thingol.lookup_const naming) cs;
   412   in subtract (op =) (Graph.all_preds program names) (Graph.keys program) end;
   413 
   414 fun read_const_exprs thy cs =
   415   let
   416     val (cs1, cs2) = Code_Thingol.read_const_exprs thy cs;
   417     val (names2, (naming, program)) = Code_Thingol.consts_program thy true cs2;
   418     val names3 = transitivly_non_empty_funs thy naming program;
   419     val cs3 = map_filter (fn (c, name) =>
   420       if member (op =) names3 name then SOME c else NONE) (cs2 ~~ names2);
   421   in union (op =) cs3 cs1 end;
   422 
   423 fun prep_destination "" = NONE
   424   | prep_destination "-" = NONE
   425   | prep_destination s = SOME (Path.explode s);
   426 
   427 fun export_code thy cs seris =
   428   let
   429     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   430     val _ = map (fn (((target, module_name), some_path), args) =>
   431       export_code_for thy some_path target NONE module_name args naming program names_cs) seris;
   432   in () end;
   433 
   434 fun export_code_cmd raw_cs seris thy = export_code thy (read_const_exprs thy raw_cs)
   435   ((map o apfst o apsnd) prep_destination seris);
   436 
   437 fun produce_code thy cs target some_width some_module_name args =
   438   let
   439     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   440   in produce_code_for thy target some_width some_module_name args naming program names_cs end;
   441 
   442 fun present_code thy cs names_stmt target some_width some_module_name args =
   443   let
   444     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   445   in present_code_for thy target some_width some_module_name args naming program (names_cs, names_stmt naming) end;
   446 
   447 fun check_code thy cs seris =
   448   let
   449     val (names_cs, (naming, program)) = Code_Thingol.consts_program thy false cs;
   450     val _ = map (fn ((target, strict), args) =>
   451       check_code_for thy target strict args naming program names_cs) seris;
   452   in () end;
   453 
   454 fun check_code_cmd raw_cs seris thy = check_code thy (read_const_exprs thy raw_cs) seris;
   455 
   456 local
   457 
   458 val parse_const_terms = Scan.repeat1 Args.term
   459   >> (fn ts => fn thy => map (Code.check_const thy) ts);
   460 
   461 fun parse_names category parse internalize lookup =
   462   Scan.lift (Args.parens (Args.$$$ category)) |-- Scan.repeat1 parse
   463   >> (fn xs => fn thy => fn naming => map_filter (lookup naming o internalize thy) xs);
   464   
   465 val parse_consts = parse_names "consts" Args.term
   466   Code.check_const Code_Thingol.lookup_const ;
   467 
   468 val parse_types = parse_names "types" (Scan.lift Args.name)
   469   Sign.intern_type Code_Thingol.lookup_tyco;
   470 
   471 val parse_classes = parse_names "classes" (Scan.lift Args.name)
   472   Sign.intern_class Code_Thingol.lookup_class;
   473 
   474 val parse_instances = parse_names "instances" (Scan.lift (Args.name --| Args.$$$ "::" -- Args.name))
   475   (fn thy => fn (raw_tyco, raw_class) => (Sign.intern_class thy raw_class, Sign.intern_type thy raw_tyco))
   476     Code_Thingol.lookup_instance;
   477 
   478 in
   479 
   480 val _ = Thy_Output.antiquotation "code_stmts"
   481   (parse_const_terms -- Scan.repeat (parse_consts || parse_types || parse_classes || parse_instances)
   482     -- Scan.lift (Args.parens (Args.name -- Scan.option Parse.int)))
   483   (fn {context = ctxt, ...} => fn ((mk_cs, mk_stmtss), (target, some_width)) =>
   484     let val thy = ProofContext.theory_of ctxt in
   485       present_code thy (mk_cs thy)
   486         (fn naming => maps (fn f => f thy naming) mk_stmtss)
   487         target some_width "Example" []
   488     end);
   489 
   490 end;
   491 
   492 
   493 (** serializer configuration **)
   494 
   495 (* data access *)
   496 
   497 fun cert_class thy class =
   498   let
   499     val _ = AxClass.get_info thy class;
   500   in class end;
   501 
   502 fun read_class thy = cert_class thy o Sign.intern_class thy;
   503 
   504 fun cert_tyco thy tyco =
   505   let
   506     val _ = if Sign.declared_tyname thy tyco then ()
   507       else error ("No such type constructor: " ^ quote tyco);
   508   in tyco end;
   509 
   510 fun read_tyco thy = cert_tyco thy o Sign.intern_type thy;
   511 
   512 fun cert_inst thy (class, tyco) =
   513   (cert_class thy class, cert_tyco thy tyco);
   514 
   515 fun read_inst thy (raw_tyco, raw_class) =
   516   (read_class thy raw_class, read_tyco thy raw_tyco);
   517 
   518 fun gen_add_syntax (mapp, upd, del) prep_x prep_syn target raw_x some_raw_syn thy =
   519   let
   520     val x = prep_x thy raw_x;
   521     val change = case some_raw_syn
   522      of SOME raw_syn => upd (x, prep_syn thy x raw_syn)
   523       | NONE => del x;
   524   in (map_symbol_syntax target o mapp) change thy end;
   525 
   526 fun gen_add_class_syntax prep_class =
   527   gen_add_syntax (apfst o apfst, Symtab.update, Symtab.delete_safe) prep_class ((K o K) I);
   528 
   529 fun gen_add_instance_syntax prep_inst =
   530   gen_add_syntax (apfst o apsnd, Symreltab.update, Symreltab.delete_safe) prep_inst ((K o K) I);
   531 
   532 fun gen_add_tyco_syntax prep_tyco =
   533   gen_add_syntax (apsnd o apfst, Symtab.update, Symtab.delete_safe) prep_tyco
   534     (fn thy => fn tyco => fn syn => if fst syn <> Sign.arity_number thy tyco
   535       then error ("Number of arguments mismatch in syntax for type constructor " ^ quote tyco)
   536       else syn);
   537 
   538 fun gen_add_const_syntax prep_const =
   539   gen_add_syntax (apsnd o apsnd, Symtab.update, Symtab.delete_safe) prep_const
   540     (fn thy => fn c => fn syn =>
   541       if Code_Printer.requires_args syn > Code.args_number thy c
   542       then error ("Too many arguments in syntax for constant " ^ quote c)
   543       else syn);
   544 
   545 fun add_reserved target sym thy =
   546   let
   547     val (_, data) = collapse_hierarchy thy target;
   548     val _ = if member (op =) (the_reserved data) sym
   549       then error ("Reserved symbol " ^ quote sym ^ " already declared")
   550       else ();
   551   in
   552     thy
   553     |> map_reserved target (insert (op =) sym)
   554   end;
   555 
   556 fun gen_add_include read_const target args thy =
   557   let
   558     fun add (name, SOME (content, raw_cs)) incls =
   559           let
   560             val _ = if Symtab.defined incls name
   561               then warning ("Overwriting existing include " ^ name)
   562               else ();
   563             val cs = map (read_const thy) raw_cs;
   564           in Symtab.update (name, (Code_Printer.str content, cs)) incls end
   565       | add (name, NONE) incls = Symtab.delete name incls;
   566   in map_includes target (add args) thy end;
   567 
   568 val add_include = gen_add_include (K I);
   569 val add_include_cmd = gen_add_include Code.read_const;
   570 
   571 fun add_module_alias target (thyname, "") =
   572       map_module_alias target (Symtab.delete thyname)
   573   | add_module_alias target (thyname, modlname) =
   574       let
   575         val xs = Long_Name.explode modlname;
   576         val xs' = map (Name.desymbolize true) xs;
   577       in if xs' = xs
   578         then map_module_alias target (Symtab.update (thyname, modlname))
   579         else error ("Invalid module name: " ^ quote modlname ^ "\n"
   580           ^ "perhaps try " ^ quote (Long_Name.implode xs'))
   581       end;
   582 
   583 fun gen_allow_abort prep_const raw_c thy =
   584   let
   585     val c = prep_const thy raw_c;
   586   in thy |> (Targets.map o apfst o apsnd) (insert (op =) c) end;
   587 
   588 
   589 (* concrete syntax *)
   590 
   591 local
   592 
   593 fun zip_list (x::xs) f g =
   594   f
   595   :|-- (fn y =>
   596     fold_map (fn x => g |-- f >> pair x) xs
   597     :|-- (fn xys => pair ((x, y) :: xys)));
   598 
   599 fun process_multi_syntax parse_thing parse_syntax change =
   600   (Parse.and_list1 parse_thing
   601   :|-- (fn things => Scan.repeat1 (Parse.$$$ "(" |-- Parse.name --
   602         (zip_list things parse_syntax (Parse.$$$ "and")) --| Parse.$$$ ")")))
   603   >> (Toplevel.theory oo fold)
   604     (fn (target, syns) => fold (fn (raw_x, syn) => change target raw_x syn) syns);
   605 
   606 in
   607 
   608 val add_class_syntax = gen_add_class_syntax cert_class;
   609 val add_instance_syntax = gen_add_instance_syntax cert_inst;
   610 val add_tyco_syntax = gen_add_tyco_syntax cert_tyco;
   611 val add_const_syntax = gen_add_const_syntax (K I);
   612 val allow_abort = gen_allow_abort (K I);
   613 val add_reserved = add_reserved;
   614 val add_include = add_include;
   615 
   616 val add_class_syntax_cmd = gen_add_class_syntax read_class;
   617 val add_instance_syntax_cmd = gen_add_instance_syntax read_inst;
   618 val add_tyco_syntax_cmd = gen_add_tyco_syntax read_tyco;
   619 val add_const_syntax_cmd = gen_add_const_syntax Code.read_const;
   620 val allow_abort_cmd = gen_allow_abort Code.read_const;
   621 
   622 fun parse_args f args =
   623   case Scan.read Token.stopper f args
   624    of SOME x => x
   625     | NONE => error "Bad serializer arguments";
   626 
   627 
   628 (** Isar setup **)
   629 
   630 val (inK, module_nameK, fileK, checkingK) = ("in", "module_name", "file", "checking");
   631 
   632 val code_expr_argsP = Scan.optional (Parse.$$$ "(" |-- Args.parse --| Parse.$$$ ")") [];
   633 
   634 val code_exprP =
   635   Scan.repeat1 Parse.term_group :|-- (fn raw_cs =>
   636     ((Parse.$$$ checkingK |-- Scan.repeat (Parse.name
   637       -- ((Parse.$$$ "?" |-- Scan.succeed false) || Scan.succeed true) -- code_expr_argsP))
   638       >> (fn seris => check_code_cmd raw_cs seris)
   639     || Scan.repeat (Parse.$$$ inK |-- Parse.name
   640        -- Scan.optional (Parse.$$$ module_nameK |-- Parse.name) ""
   641        -- Scan.optional (Parse.$$$ fileK |-- Parse.name) ""
   642        -- code_expr_argsP) >> (fn seris => export_code_cmd raw_cs seris)));
   643 
   644 val _ = List.app Keyword.keyword [inK, module_nameK, fileK, checkingK];
   645 
   646 val _ =
   647   Outer_Syntax.command "code_class" "define code syntax for class" Keyword.thy_decl (
   648     process_multi_syntax Parse.xname (Scan.option Parse.string)
   649     add_class_syntax_cmd);
   650 
   651 val _ =
   652   Outer_Syntax.command "code_instance" "define code syntax for instance" Keyword.thy_decl (
   653     process_multi_syntax (Parse.xname --| Parse.$$$ "::" -- Parse.xname)
   654       (Scan.option (Parse.minus >> K ()))
   655     add_instance_syntax_cmd);
   656 
   657 val _ =
   658   Outer_Syntax.command "code_type" "define code syntax for type constructor" Keyword.thy_decl (
   659     process_multi_syntax Parse.xname Code_Printer.parse_tyco_syntax
   660     add_tyco_syntax_cmd);
   661 
   662 val _ =
   663   Outer_Syntax.command "code_const" "define code syntax for constant" Keyword.thy_decl (
   664     process_multi_syntax Parse.term_group Code_Printer.parse_const_syntax
   665     add_const_syntax_cmd);
   666 
   667 val _ =
   668   Outer_Syntax.command "code_reserved" "declare words as reserved for target language"
   669     Keyword.thy_decl (
   670     Parse.name -- Scan.repeat1 Parse.name
   671     >> (fn (target, reserveds) => (Toplevel.theory o fold (add_reserved target)) reserveds)
   672   );
   673 
   674 val _ =
   675   Outer_Syntax.command "code_include" "declare piece of code to be included in generated code"
   676     Keyword.thy_decl (
   677     Parse.name -- Parse.name -- (Parse.text :|-- (fn "-" => Scan.succeed NONE
   678       | s => Scan.optional (Parse.$$$ "attach" |-- Scan.repeat1 Parse.term) [] >> pair s >> SOME))
   679     >> (fn ((target, name), content_consts) =>
   680         (Toplevel.theory o add_include_cmd target) (name, content_consts))
   681   );
   682 
   683 val _ =
   684   Outer_Syntax.command "code_modulename" "alias module to other name" Keyword.thy_decl (
   685     Parse.name -- Scan.repeat1 (Parse.name -- Parse.name)
   686     >> (fn (target, modlnames) => (Toplevel.theory o fold (add_module_alias target)) modlnames)
   687   );
   688 
   689 val _ =
   690   Outer_Syntax.command "code_abort" "permit constant to be implemented as program abort"
   691     Keyword.thy_decl (
   692     Scan.repeat1 Parse.term_group >> (Toplevel.theory o fold allow_abort_cmd)
   693   );
   694 
   695 val _ =
   696   Outer_Syntax.command "export_code" "generate executable code for constants"
   697     Keyword.diag (Parse.!!! code_exprP >> (fn f => Toplevel.keep (f o Toplevel.theory_of)));
   698 
   699 end; (*local*)
   700 
   701 
   702 (** external entrance point -- for codegen tool **)
   703 
   704 fun codegen_tool thyname cmd_expr =
   705   let
   706     val thy = Thy_Info.get_theory thyname;
   707     val parse = Scan.read Token.stopper (Parse.!!! code_exprP) o
   708       (filter Token.is_proper o Outer_Syntax.scan Position.none);
   709   in case parse cmd_expr
   710    of SOME f => (writeln "Now generating code..."; f thy)
   711     | NONE => error ("Bad directive " ^ quote cmd_expr)
   712   end;
   713 
   714 end; (*struct*)