haftmann@36534: (*  Title:      Tools/code/code_eval.ML
haftmann@28054:     Author:     Florian Haftmann, TU Muenchen
haftmann@28054: 
haftmann@34028: Runtime services building on code generation into implementation language SML.
haftmann@28054: *)
haftmann@28054: 
haftmann@34028: signature CODE_EVAL =
haftmann@28054: sig
haftmann@34028:   val target: string
wenzelm@32740:   val eval: string option -> string * (unit -> 'a) option Unsynchronized.ref
haftmann@30970:     -> ((term -> term) -> 'a -> 'a) -> theory -> term -> string list -> 'a
haftmann@36470:   val evaluation_code: theory -> string -> string list -> string list
haftmann@34028:     -> string * ((string * string) list * (string * string) list)
haftmann@28054:   val setup: theory -> theory
haftmann@28054: end;
haftmann@28054: 
haftmann@34028: structure Code_Eval : CODE_EVAL =
haftmann@28054: struct
haftmann@28054: 
haftmann@33992: (** generic **)
haftmann@33992: 
haftmann@34028: val target = "Eval";
haftmann@28054: 
haftmann@34032: val eval_struct_name = "Code";
haftmann@33992: 
haftmann@36470: fun evaluation_code thy struct_name_hint tycos consts =
haftmann@33992:   let
haftmann@36271:     val (consts', (naming, program)) = Code_Thingol.consts_program thy false consts;
haftmann@34028:     val tycos' = map (the o Code_Thingol.lookup_tyco naming) tycos;
haftmann@36470:     val struct_name = if struct_name_hint = "" then eval_struct_name
haftmann@36470:       else struct_name_hint;
haftmann@34028:     val (ml_code, target_names) = Code_ML.evaluation_code_of thy target
haftmann@36470:       struct_name naming program (consts' @ tycos');
haftmann@34028:     val (consts'', tycos'') = chop (length consts') target_names;
haftmann@34028:     val consts_map = map2 (fn const => fn NONE =>
haftmann@34028:         error ("Constant " ^ (quote o Code.string_of_const thy) const
haftmann@34028:           ^ "\nhas a user-defined serialization")
haftmann@34028:       | SOME const'' => (const, const'')) consts consts''
haftmann@34028:     val tycos_map = map2 (fn tyco => fn NONE =>
haftmann@34028:         error ("Type " ^ (quote o Sign.extern_type thy) tyco
haftmann@34028:           ^ "\nhas a user-defined serialization")
haftmann@34028:       | SOME tyco'' => (tyco, tyco'')) tycos tycos'';
haftmann@34028:   in (ml_code, (tycos_map, consts_map)) end;
haftmann@28054: 
haftmann@28054: 
haftmann@34028: (** evaluation **)
haftmann@28054: 
haftmann@30970: fun eval some_target reff postproc thy t args =
haftmann@28054:   let
wenzelm@36610:     val ctxt = ProofContext.init_global thy;
haftmann@31063:     fun evaluator naming program ((_, (_, ty)), t) deps =
haftmann@28054:       let
haftmann@28054:         val _ = if Code_Thingol.contains_dictvar t then
haftmann@28724:           error "Term to be evaluated contains free dictionaries" else ();
haftmann@28663:         val value_name = "Value.VALUE.value"
haftmann@28054:         val program' = program
haftmann@28663:           |> Graph.new_node (value_name,
haftmann@35228:               Code_Thingol.Fun (Term.dummy_patternN, (([], ty), [(([], t), (NONE, true))])))
haftmann@28663:           |> fold (curry Graph.add_edge value_name) deps;
haftmann@34028:         val (value_code, [SOME value_name']) = Code_ML.evaluation_code_of thy
haftmann@34032:           (the_default target some_target) "" naming program' [value_name];
haftmann@28054:         val sml_code = "let\n" ^ value_code ^ "\nin " ^ value_name'
haftmann@28054:           ^ space_implode " " (map (enclose "(" ")") args) ^ " end";
wenzelm@30672:       in ML_Context.evaluate ctxt false reff sml_code end;
haftmann@32123:   in Code_Thingol.eval thy postproc evaluator t end;
haftmann@28054: 
haftmann@28054: 
haftmann@34028: (** instrumentalization by antiquotation **)
haftmann@28054: 
haftmann@28054: local
haftmann@28054: 
wenzelm@33519: structure CodeAntiqData = Proof_Data
haftmann@28054: (
haftmann@30962:   type T = (string list * string list) * (bool * (string
haftmann@30962:     * (string * ((string * string) list * (string * string) list)) lazy));
haftmann@30962:   fun init _ = (([], []), (true, ("", Lazy.value ("", ([], [])))));
haftmann@28054: );
haftmann@28054: 
haftmann@28054: val is_first_occ = fst o snd o CodeAntiqData.get;
haftmann@28054: 
haftmann@30962: fun register_code new_tycos new_consts ctxt =
haftmann@28054:   let
haftmann@30962:     val ((tycos, consts), (_, (struct_name, _))) = CodeAntiqData.get ctxt;
haftmann@30962:     val tycos' = fold (insert (op =)) new_tycos tycos;
haftmann@30962:     val consts' = fold (insert (op =)) new_consts consts;
haftmann@28054:     val (struct_name', ctxt') = if struct_name = ""
haftmann@33992:       then ML_Antiquote.variant eval_struct_name ctxt
haftmann@28054:       else (struct_name, ctxt);
haftmann@36470:     val acc_code = Lazy.lazy
haftmann@36470:       (fn () => evaluation_code (ProofContext.theory_of ctxt) eval_struct_name tycos' consts');
haftmann@30962:   in CodeAntiqData.put ((tycos', consts'), (false, (struct_name', acc_code))) ctxt' end;
haftmann@30962: 
haftmann@30962: fun register_const const = register_code [] [const];
haftmann@28054: 
haftmann@30962: fun register_datatype tyco constrs = register_code [tyco] constrs;
haftmann@30962: 
haftmann@30962: fun print_const const all_struct_name tycos_map consts_map =
haftmann@30962:   (Long_Name.append all_struct_name o the o AList.lookup (op =) consts_map) const;
haftmann@30962: 
wenzelm@35019: fun print_code is_first print_it ctxt =
haftmann@30962:   let
haftmann@30962:     val (_, (_, (struct_code_name, acc_code))) = CodeAntiqData.get ctxt;
haftmann@33992:     val (ml_code, (tycos_map, consts_map)) = Lazy.force acc_code;
haftmann@33992:     val ml_code = if is_first then ml_code
haftmann@28054:       else "";
wenzelm@35019:     val all_struct_name = "Isabelle." ^ struct_code_name;
haftmann@30962:   in (ml_code, print_it all_struct_name tycos_map consts_map) end;
haftmann@28054: 
haftmann@28054: in
haftmann@28054: 
wenzelm@35019: fun ml_code_antiq raw_const background =
haftmann@28054:   let
haftmann@31156:     val const = Code.check_const (ProofContext.theory_of background) raw_const;
haftmann@28054:     val is_first = is_first_occ background;
haftmann@28054:     val background' = register_const const background;
wenzelm@35019:   in (print_code is_first (print_const const), background') end;
haftmann@30962: 
haftmann@28054: end; (*local*)
haftmann@28054: 
haftmann@28054: 
haftmann@36470: (** reflection support **)
haftmann@36470: 
haftmann@36470: fun check_datatype thy tyco consts =
haftmann@36470:   let
haftmann@36470:     val constrs = (map fst o snd o Code.get_type thy) tyco;
haftmann@36470:     val missing_constrs = subtract (op =) consts constrs;
haftmann@36470:     val _ = if null missing_constrs then []
haftmann@36470:       else error ("Missing constructor(s) " ^ commas (map quote missing_constrs)
haftmann@36470:         ^ " for datatype " ^ quote tyco);
haftmann@36470:     val false_constrs = subtract (op =) constrs consts;
haftmann@36470:     val _ = if null false_constrs then []
haftmann@36470:       else error ("Non-constructor(s) " ^ commas (map quote false_constrs)
haftmann@36470:         ^ " for datatype " ^ quote tyco);
haftmann@36470:   in () end;
haftmann@36470: 
haftmann@36470: fun add_eval_tyco (tyco, tyco') thy =
haftmann@36470:   let
haftmann@36470:     val k = Sign.arity_number thy tyco;
haftmann@36470:     fun pr pr' fxy [] = tyco'
haftmann@36470:       | pr pr' fxy [ty] =
haftmann@36470:           Code_Printer.concat [pr' Code_Printer.BR ty, tyco']
haftmann@36470:       | pr pr' fxy tys =
haftmann@36470:           Code_Printer.concat [Code_Printer.enum "," "(" ")" (map (pr' Code_Printer.BR) tys), tyco']
haftmann@36470:   in
haftmann@36470:     thy
haftmann@36470:     |> Code_Target.add_syntax_tyco target tyco (SOME (k, pr))
haftmann@36470:   end;
haftmann@36470: 
haftmann@36514: fun add_eval_constr (const, const') thy =
haftmann@36514:   let
haftmann@36514:     val k = Code.args_number thy const;
haftmann@36514:     fun pr pr' fxy ts = Code_Printer.brackify fxy
haftmann@36514:       (const' :: the_list (Code_ML.print_tuple pr' Code_Printer.BR (map fst ts)));
haftmann@36514:   in
haftmann@36514:     thy
haftmann@36514:     |> Code_Target.add_syntax_const target const (SOME (Code_Printer.simple_const_syntax (k, pr)))
haftmann@36514:   end;
haftmann@36514: 
haftmann@36470: fun add_eval_const (const, const') = Code_Target.add_syntax_const target
haftmann@36470:   const (SOME (Code_Printer.simple_const_syntax (0, (K o K o K) const')));
haftmann@36470: 
haftmann@36514: fun process (code_body, (tyco_map, (constr_map, const_map))) module_name NONE thy =
haftmann@36470:       let
haftmann@36470:         val pr = Code_Printer.str o Long_Name.append module_name;
haftmann@36470:       in
haftmann@36470:         thy
haftmann@36470:         |> Code_Target.add_reserved target module_name
haftmann@36470:         |> Context.theory_map (ML_Context.exec (fn () => ML_Context.eval true Position.none code_body))
haftmann@36470:         |> fold (add_eval_tyco o apsnd pr) tyco_map
haftmann@36514:         |> fold (add_eval_constr o apsnd pr) constr_map
haftmann@36470:         |> fold (add_eval_const o apsnd pr) const_map
haftmann@36470:       end
haftmann@36470:   | process (code_body, _) _ (SOME file_name) thy =
haftmann@36470:       let
haftmann@36470:         val preamble = "(* Generated from " ^ Path.implode (ThyLoad.thy_path (Context.theory_name thy))
haftmann@36470:           ^ "; DO NOT EDIT! *)";
haftmann@36470:         val _ = File.write (Path.explode file_name) (preamble ^ "\n\n" ^ code_body);
haftmann@36470:       in
haftmann@36470:         thy
haftmann@36470:       end;
haftmann@36470: 
haftmann@36470: fun gen_code_reflect prep_type prep_const raw_datatypes raw_functions module_name some_file thy  =
haftmann@36470:   let
haftmann@36470:     val datatypes = map (fn (raw_tyco, raw_cos) =>
haftmann@36470:       (prep_type thy raw_tyco, map (prep_const thy) raw_cos)) raw_datatypes;
haftmann@36514:     val _ = map (uncurry (check_datatype thy)) datatypes;
haftmann@36514:     val tycos = map fst datatypes;
haftmann@36514:     val constrs = maps snd datatypes;
haftmann@36470:     val functions = map (prep_const thy) raw_functions;
haftmann@36514:     val result = evaluation_code thy module_name tycos (constrs @ functions)
haftmann@36514:       |> (apsnd o apsnd) (chop (length constrs));
haftmann@36470:   in
haftmann@36470:     thy
haftmann@36514:     |> process result module_name some_file
haftmann@36470:   end;
haftmann@36470: 
haftmann@36470: val code_reflect = gen_code_reflect Code_Target.cert_tyco Code.check_const;
haftmann@36470: val code_reflect_cmd = gen_code_reflect Code_Target.read_tyco Code.read_const;
haftmann@36470: 
haftmann@36470: 
haftmann@28054: (** Isar setup **)
haftmann@28054: 
haftmann@28054: val _ = ML_Context.add_antiq "code" (fn _ => Args.term >> ml_code_antiq);
haftmann@28054: 
haftmann@36470: local
haftmann@36470: 
haftmann@36470: val datatypesK = "datatypes";
haftmann@36470: val functionsK = "functions";
haftmann@36470: val fileK = "file";
haftmann@36470: val andK = "and"
haftmann@36470: 
wenzelm@36960: val _ = List.app Keyword.keyword [datatypesK, functionsK];
haftmann@36470: 
wenzelm@36960: val parse_datatype =
wenzelm@36960:   Parse.name --| Parse.$$$ "=" -- (Parse.term ::: (Scan.repeat (Parse.$$$ "|" |-- Parse.term)));
haftmann@36470: 
haftmann@36470: in
haftmann@36470: 
haftmann@36470: val _ =
wenzelm@36960:   Outer_Syntax.command "code_reflect" "enrich runtime environment with generated code"
wenzelm@36960:     Keyword.thy_decl (Parse.name -- Scan.optional (Parse.$$$ datatypesK |-- (parse_datatype
wenzelm@36960:       ::: Scan.repeat (Parse.$$$ andK |-- parse_datatype))) []
wenzelm@36960:     -- Scan.optional (Parse.$$$ functionsK |-- Scan.repeat1 Parse.name) []
wenzelm@36960:     -- Scan.option (Parse.$$$ fileK |-- Parse.name)
haftmann@36534:   >> (fn (((module_name, raw_datatypes), raw_functions), some_file) => Toplevel.theory
haftmann@36470:     (code_reflect_cmd raw_datatypes raw_functions module_name some_file)));
haftmann@36470: 
haftmann@36470: end; (*local*)
haftmann@36470: 
haftmann@34028: val setup = Code_Target.extend_target (target, (Code_ML.target_SML, K I));
haftmann@28054: 
haftmann@28054: end; (*struct*)