src/Tools/Code/code_runtime.ML
author haftmann
Wed Sep 15 15:31:32 2010 +0200 (2010-09-15)
changeset 39401 887f4218a39a
parent 39388 src/Tools/Code/code_eval.ML@fdbb2c55ffc2
child 39404 a8c337299bc1
permissions -rw-r--r--
code_eval renamed to code_runtime
     1 (*  Title:      Tools/Code/code_runtime.ML
     2     Author:     Florian Haftmann, TU Muenchen
     3 
     4 Runtime services building on code generation into implementation language SML.
     5 *)
     6 
     7 signature CODE_RUNTIME =
     8 sig
     9   val target: string
    10   val eval: string option
    11     -> (Proof.context -> unit -> 'a) * ((unit -> 'a) -> Proof.context -> Proof.context) * string
    12     -> ((term -> term) -> 'a -> 'a) -> theory -> term -> string list -> 'a
    13   val setup: theory -> theory
    14 end;
    15 
    16 structure Code_Runtime : CODE_RUNTIME =
    17 struct
    18 
    19 (** generic **)
    20 
    21 val target = "Eval";
    22 
    23 fun evaluation_code thy module_name tycos consts =
    24   let
    25     val (consts', (naming, program)) = Code_Thingol.consts_program thy false consts;
    26     val tycos' = map (the o Code_Thingol.lookup_tyco naming) tycos;
    27     val (ml_code, target_names) = Code_Target.produce_code_for thy
    28       target NONE module_name [] naming program (consts' @ tycos');
    29     val (consts'', tycos'') = chop (length consts') target_names;
    30     val consts_map = map2 (fn const => fn NONE =>
    31         error ("Constant " ^ (quote o Code.string_of_const thy) const
    32           ^ "\nhas a user-defined serialization")
    33       | SOME const'' => (const, const'')) consts consts''
    34     val tycos_map = map2 (fn tyco => fn NONE =>
    35         error ("Type " ^ (quote o Sign.extern_type thy) tyco
    36           ^ "\nhas a user-defined serialization")
    37       | SOME tyco'' => (tyco, tyco'')) tycos tycos'';
    38   in (ml_code, (tycos_map, consts_map)) end;
    39 
    40 
    41 (** evaluation **)
    42 
    43 fun eval some_target cookie postproc thy t args =
    44   let
    45     val ctxt = ProofContext.init_global thy;
    46     fun evaluator naming program ((_, (_, ty)), t) deps =
    47       let
    48         val _ = if Code_Thingol.contains_dictvar t then
    49           error "Term to be evaluated contains free dictionaries" else ();
    50         val value_name = "Value.VALUE.value"
    51         val program' = program
    52           |> Graph.new_node (value_name,
    53               Code_Thingol.Fun (Term.dummy_patternN, ((([], ty), [(([], t), (NONE, true))]), NONE)))
    54           |> fold (curry Graph.add_edge value_name) deps;
    55         val (program_code, [SOME value_name']) = Code_Target.produce_code_for thy
    56           (the_default target some_target) NONE "Code" [] naming program' [value_name];
    57         val value_code = space_implode " "
    58           (value_name' :: map (enclose "(" ")") args);
    59       in ML_Context.value ctxt cookie (program_code, value_code) end;
    60   in Code_Thingol.dynamic_eval_value thy postproc evaluator t end;
    61 
    62 
    63 (** instrumentalization by antiquotation **)
    64 
    65 local
    66 
    67 structure Code_Antiq_Data = Proof_Data
    68 (
    69   type T = (string list * string list) * (bool
    70     * (string * ((string * string) list * (string * string) list)) lazy);
    71   fun init _ = (([], []), (true, (Lazy.value ("", ([], [])))));
    72 );
    73 
    74 val is_first_occ = fst o snd o Code_Antiq_Data.get;
    75 
    76 fun register_code new_tycos new_consts ctxt =
    77   let
    78     val ((tycos, consts), _) = Code_Antiq_Data.get ctxt;
    79     val tycos' = fold (insert (op =)) new_tycos tycos;
    80     val consts' = fold (insert (op =)) new_consts consts;
    81     val acc_code = Lazy.lazy (fn () =>
    82       evaluation_code (ProofContext.theory_of ctxt) "Code" tycos' consts');
    83   in Code_Antiq_Data.put ((tycos', consts'), (false, acc_code)) ctxt end;
    84 
    85 fun register_const const = register_code [] [const];
    86 
    87 fun register_datatype tyco constrs = register_code [tyco] constrs;
    88 
    89 fun print_const const all_struct_name tycos_map consts_map =
    90   (Long_Name.append all_struct_name o the o AList.lookup (op =) consts_map) const;
    91 
    92 fun print_code is_first print_it ctxt =
    93   let
    94     val (_, (_, acc_code)) = Code_Antiq_Data.get ctxt;
    95     val (ml_code, (tycos_map, consts_map)) = Lazy.force acc_code;
    96     val ml_code = if is_first then ml_code
    97       else "";
    98     val all_struct_name = "Isabelle";
    99   in (ml_code, print_it all_struct_name tycos_map consts_map) end;
   100 
   101 in
   102 
   103 fun ml_code_antiq raw_const background =
   104   let
   105     val const = Code.check_const (ProofContext.theory_of background) raw_const;
   106     val is_first = is_first_occ background;
   107     val background' = register_const const background;
   108   in (print_code is_first (print_const const), background') end;
   109 
   110 end; (*local*)
   111 
   112 
   113 (** reflection support **)
   114 
   115 fun check_datatype thy tyco consts =
   116   let
   117     val constrs = (map (fst o fst) o snd o Code.get_type thy) tyco;
   118     val missing_constrs = subtract (op =) consts constrs;
   119     val _ = if null missing_constrs then []
   120       else error ("Missing constructor(s) " ^ commas (map quote missing_constrs)
   121         ^ " for datatype " ^ quote tyco);
   122     val false_constrs = subtract (op =) constrs consts;
   123     val _ = if null false_constrs then []
   124       else error ("Non-constructor(s) " ^ commas (map quote false_constrs)
   125         ^ " for datatype " ^ quote tyco);
   126   in () end;
   127 
   128 fun add_eval_tyco (tyco, tyco') thy =
   129   let
   130     val k = Sign.arity_number thy tyco;
   131     fun pr pr' fxy [] = tyco'
   132       | pr pr' fxy [ty] =
   133           Code_Printer.concat [pr' Code_Printer.BR ty, tyco']
   134       | pr pr' fxy tys =
   135           Code_Printer.concat [Code_Printer.enum "," "(" ")" (map (pr' Code_Printer.BR) tys), tyco']
   136   in
   137     thy
   138     |> Code_Target.add_tyco_syntax target tyco (SOME (k, pr))
   139   end;
   140 
   141 fun add_eval_constr (const, const') thy =
   142   let
   143     val k = Code.args_number thy const;
   144     fun pr pr' fxy ts = Code_Printer.brackify fxy
   145       (const' :: the_list (Code_Printer.tuplify pr' Code_Printer.BR (map fst ts)));
   146   in
   147     thy
   148     |> Code_Target.add_const_syntax target const (SOME (Code_Printer.simple_const_syntax (k, pr)))
   149   end;
   150 
   151 fun add_eval_const (const, const') = Code_Target.add_const_syntax target
   152   const (SOME (Code_Printer.simple_const_syntax (0, (K o K o K) const')));
   153 
   154 fun process (code_body, (tyco_map, (constr_map, const_map))) module_name NONE thy =
   155       thy
   156       |> Code_Target.add_reserved target module_name
   157       |> Context.theory_map
   158         (ML_Context.exec (fn () => ML_Context.eval_text true Position.none code_body))
   159       |> fold (add_eval_tyco o apsnd Code_Printer.str) tyco_map
   160       |> fold (add_eval_constr o apsnd Code_Printer.str) constr_map
   161       |> fold (add_eval_const o apsnd Code_Printer.str) const_map
   162   | process (code_body, _) _ (SOME file_name) thy =
   163       let
   164         val preamble =
   165           "(* Generated from " ^ Path.implode (Thy_Header.thy_path (Context.theory_name thy))
   166           ^ "; DO NOT EDIT! *)";
   167         val _ = File.write (Path.explode file_name) (preamble ^ "\n\n" ^ code_body);
   168       in
   169         thy
   170       end;
   171 
   172 fun gen_code_reflect prep_type prep_const raw_datatypes raw_functions module_name some_file thy  =
   173   let
   174     val datatypes = map (fn (raw_tyco, raw_cos) =>
   175       (prep_type thy raw_tyco, map (prep_const thy) raw_cos)) raw_datatypes;
   176     val _ = map (uncurry (check_datatype thy)) datatypes;
   177     val tycos = map fst datatypes;
   178     val constrs = maps snd datatypes;
   179     val functions = map (prep_const thy) raw_functions;
   180     val result = evaluation_code thy module_name tycos (constrs @ functions)
   181       |> (apsnd o apsnd) (chop (length constrs));
   182   in
   183     thy
   184     |> process result module_name some_file
   185   end;
   186 
   187 val code_reflect = gen_code_reflect Code_Target.cert_tyco Code.check_const;
   188 val code_reflect_cmd = gen_code_reflect Code_Target.read_tyco Code.read_const;
   189 
   190 
   191 (** Isar setup **)
   192 
   193 val _ = ML_Context.add_antiq "code" (fn _ => Args.term >> ml_code_antiq);
   194 
   195 local
   196 
   197 val datatypesK = "datatypes";
   198 val functionsK = "functions";
   199 val fileK = "file";
   200 val andK = "and"
   201 
   202 val _ = List.app Keyword.keyword [datatypesK, functionsK];
   203 
   204 val parse_datatype =
   205   Parse.name --| Parse.$$$ "=" -- (Parse.term ::: (Scan.repeat (Parse.$$$ "|" |-- Parse.term)));
   206 
   207 in
   208 
   209 val _ =
   210   Outer_Syntax.command "code_reflect" "enrich runtime environment with generated code"
   211     Keyword.thy_decl (Parse.name -- Scan.optional (Parse.$$$ datatypesK |-- (parse_datatype
   212       ::: Scan.repeat (Parse.$$$ andK |-- parse_datatype))) []
   213     -- Scan.optional (Parse.$$$ functionsK |-- Scan.repeat1 Parse.name) []
   214     -- Scan.option (Parse.$$$ fileK |-- Parse.name)
   215   >> (fn (((module_name, raw_datatypes), raw_functions), some_file) => Toplevel.theory
   216     (code_reflect_cmd raw_datatypes raw_functions module_name some_file)));
   217 
   218 end; (*local*)
   219 
   220 val setup = Code_Target.extend_target (target, (Code_ML.target_SML, K I));
   221 
   222 end; (*struct*)