1 (* Title: Tools/code/code_eval.ML_
2 Author: Florian Haftmann, TU Muenchen
4 Runtime services building on code generation into implementation language SML.
10 val eval: string option -> string * (unit -> 'a) option Unsynchronized.ref
11 -> ((term -> term) -> 'a -> 'a) -> theory -> term -> string list -> 'a
12 val evaluation_code: theory -> string -> string list -> string list
13 -> string * ((string * string) list * (string * string) list)
14 val setup: theory -> theory
17 structure Code_Eval : CODE_EVAL =
24 val eval_struct_name = "Code";
26 fun evaluation_code thy struct_name_hint tycos consts =
28 val (consts', (naming, program)) = Code_Thingol.consts_program thy false consts;
29 val tycos' = map (the o Code_Thingol.lookup_tyco naming) tycos;
30 val struct_name = if struct_name_hint = "" then eval_struct_name
31 else struct_name_hint;
32 val (ml_code, target_names) = Code_ML.evaluation_code_of thy target
33 struct_name naming program (consts' @ tycos');
34 val (consts'', tycos'') = chop (length consts') target_names;
35 val consts_map = map2 (fn const => fn NONE =>
36 error ("Constant " ^ (quote o Code.string_of_const thy) const
37 ^ "\nhas a user-defined serialization")
38 | SOME const'' => (const, const'')) consts consts''
39 val tycos_map = map2 (fn tyco => fn NONE =>
40 error ("Type " ^ (quote o Sign.extern_type thy) tyco
41 ^ "\nhas a user-defined serialization")
42 | SOME tyco'' => (tyco, tyco'')) tycos tycos'';
43 in (ml_code, (tycos_map, consts_map)) end;
48 fun eval some_target reff postproc thy t args =
50 val ctxt = ProofContext.init thy;
51 fun evaluator naming program ((_, (_, ty)), t) deps =
53 val _ = if Code_Thingol.contains_dictvar t then
54 error "Term to be evaluated contains free dictionaries" else ();
55 val value_name = "Value.VALUE.value"
56 val program' = program
57 |> Graph.new_node (value_name,
58 Code_Thingol.Fun (Term.dummy_patternN, (([], ty), [(([], t), (NONE, true))])))
59 |> fold (curry Graph.add_edge value_name) deps;
60 val (value_code, [SOME value_name']) = Code_ML.evaluation_code_of thy
61 (the_default target some_target) "" naming program' [value_name];
62 val sml_code = "let\n" ^ value_code ^ "\nin " ^ value_name'
63 ^ space_implode " " (map (enclose "(" ")") args) ^ " end";
64 in ML_Context.evaluate ctxt false reff sml_code end;
65 in Code_Thingol.eval thy postproc evaluator t end;
68 (** instrumentalization by antiquotation **)
72 structure CodeAntiqData = Proof_Data
74 type T = (string list * string list) * (bool * (string
75 * (string * ((string * string) list * (string * string) list)) lazy));
76 fun init _ = (([], []), (true, ("", Lazy.value ("", ([], [])))));
79 val is_first_occ = fst o snd o CodeAntiqData.get;
81 fun register_code new_tycos new_consts ctxt =
83 val ((tycos, consts), (_, (struct_name, _))) = CodeAntiqData.get ctxt;
84 val tycos' = fold (insert (op =)) new_tycos tycos;
85 val consts' = fold (insert (op =)) new_consts consts;
86 val (struct_name', ctxt') = if struct_name = ""
87 then ML_Antiquote.variant eval_struct_name ctxt
88 else (struct_name, ctxt);
89 val acc_code = Lazy.lazy
90 (fn () => evaluation_code (ProofContext.theory_of ctxt) eval_struct_name tycos' consts');
91 in CodeAntiqData.put ((tycos', consts'), (false, (struct_name', acc_code))) ctxt' end;
93 fun register_const const = register_code [] [const];
95 fun register_datatype tyco constrs = register_code [tyco] constrs;
97 fun print_const const all_struct_name tycos_map consts_map =
98 (Long_Name.append all_struct_name o the o AList.lookup (op =) consts_map) const;
100 fun print_datatype tyco constrs all_struct_name tycos_map consts_map =
102 val upperize = implode o nth_map 0 Symbol.to_ascii_upper o explode;
103 fun check_base name name'' =
104 if upperize (Long_Name.base_name name) = upperize name''
105 then () else error ("Name as printed " ^ quote name''
106 ^ "\ndiffers from logical base name " ^ quote (Long_Name.base_name name) ^ "; sorry.");
107 val tyco'' = (the o AList.lookup (op =) tycos_map) tyco;
108 val constrs'' = map (the o AList.lookup (op =) consts_map) constrs;
109 val _ = check_base tyco tyco'';
110 val _ = map2 check_base constrs constrs'';
111 in "datatype " ^ tyco'' ^ " = datatype " ^ Long_Name.append all_struct_name tyco'' end;
113 fun print_code is_first print_it ctxt =
115 val (_, (_, (struct_code_name, acc_code))) = CodeAntiqData.get ctxt;
116 val (ml_code, (tycos_map, consts_map)) = Lazy.force acc_code;
117 val ml_code = if is_first then ml_code
119 val all_struct_name = "Isabelle." ^ struct_code_name;
120 in (ml_code, print_it all_struct_name tycos_map consts_map) end;
124 fun ml_code_antiq raw_const background =
126 val const = Code.check_const (ProofContext.theory_of background) raw_const;
127 val is_first = is_first_occ background;
128 val background' = register_const const background;
129 in (print_code is_first (print_const const), background') end;
131 fun ml_code_datatype_antiq (raw_tyco, raw_constrs) background =
133 val thy = ProofContext.theory_of background;
134 val tyco = Sign.intern_type thy raw_tyco;
135 val constrs = map (Code.check_const thy) raw_constrs;
136 val constrs' = (map fst o snd o Code.get_type thy) tyco;
137 val _ = if eq_set (op =) (constrs, constrs') then ()
138 else error ("Type " ^ quote tyco ^ ": given constructors diverge from real constructors")
139 val is_first = is_first_occ background;
140 val background' = register_datatype tyco constrs background;
141 in (print_code is_first (print_datatype tyco constrs), background') end;
146 (** reflection support **)
148 fun check_datatype thy tyco consts =
150 val constrs = (map fst o snd o Code.get_type thy) tyco;
151 val missing_constrs = subtract (op =) consts constrs;
152 val _ = if null missing_constrs then []
153 else error ("Missing constructor(s) " ^ commas (map quote missing_constrs)
154 ^ " for datatype " ^ quote tyco);
155 val false_constrs = subtract (op =) constrs consts;
156 val _ = if null false_constrs then []
157 else error ("Non-constructor(s) " ^ commas (map quote false_constrs)
158 ^ " for datatype " ^ quote tyco);
161 fun add_eval_tyco (tyco, tyco') thy =
163 val k = Sign.arity_number thy tyco;
164 fun pr pr' fxy [] = tyco'
166 Code_Printer.concat [pr' Code_Printer.BR ty, tyco']
168 Code_Printer.concat [Code_Printer.enum "," "(" ")" (map (pr' Code_Printer.BR) tys), tyco']
171 |> Code_Target.add_syntax_tyco target tyco (SOME (k, pr))
174 fun add_eval_constr (const, const') thy =
176 val k = Code.args_number thy const;
177 fun pr pr' fxy ts = Code_Printer.brackify fxy
178 (const' :: the_list (Code_ML.print_tuple pr' Code_Printer.BR (map fst ts)));
181 |> Code_Target.add_syntax_const target const (SOME (Code_Printer.simple_const_syntax (k, pr)))
184 fun add_eval_const (const, const') = Code_Target.add_syntax_const target
185 const (SOME (Code_Printer.simple_const_syntax (0, (K o K o K) const')));
187 fun process (code_body, (tyco_map, (constr_map, const_map))) module_name NONE thy =
189 val pr = Code_Printer.str o Long_Name.append module_name;
192 |> Code_Target.add_reserved target module_name
193 |> Context.theory_map (ML_Context.exec (fn () => ML_Context.eval true Position.none code_body))
194 |> fold (add_eval_tyco o apsnd pr) tyco_map
195 |> fold (add_eval_constr o apsnd pr) constr_map
196 |> fold (add_eval_const o apsnd pr) const_map
198 | process (code_body, _) _ (SOME file_name) thy =
200 val preamble = "(* Generated from " ^ Path.implode (ThyLoad.thy_path (Context.theory_name thy))
201 ^ "; DO NOT EDIT! *)";
202 val _ = File.write (Path.explode file_name) (preamble ^ "\n\n" ^ code_body);
207 fun gen_code_reflect prep_type prep_const raw_datatypes raw_functions module_name some_file thy =
209 val datatypes = map (fn (raw_tyco, raw_cos) =>
210 (prep_type thy raw_tyco, map (prep_const thy) raw_cos)) raw_datatypes;
211 val _ = map (uncurry (check_datatype thy)) datatypes;
212 val tycos = map fst datatypes;
213 val constrs = maps snd datatypes;
214 val functions = map (prep_const thy) raw_functions;
215 val result = evaluation_code thy module_name tycos (constrs @ functions)
216 |> (apsnd o apsnd) (chop (length constrs));
219 |> process result module_name some_file
222 val code_reflect = gen_code_reflect Code_Target.cert_tyco Code.check_const;
223 val code_reflect_cmd = gen_code_reflect Code_Target.read_tyco Code.read_const;
228 val _ = ML_Context.add_antiq "code" (fn _ => Args.term >> ml_code_antiq);
229 val _ = ML_Context.add_antiq "code_datatype" (fn _ =>
230 (Args.type_name true --| Scan.lift (Args.$$$ "=")
231 -- (Args.term ::: Scan.repeat (Scan.lift (Args.$$$ "|") |-- Args.term)))
232 >> ml_code_datatype_antiq);
236 structure P = OuterParse
239 val datatypesK = "datatypes";
240 val functionsK = "functions";
241 val module_nameK = "module_name";
245 val _ = List.app K.keyword [datatypesK, functionsK];
247 val parse_datatype = (P.name --| P.$$$ "=" -- (P.term ::: (Scan.repeat (P.$$$ "|" |-- P.term))));
252 OuterSyntax.command "code_reflect" "enrich runtime environment with generated code"
253 K.thy_decl (Scan.optional (P.$$$ datatypesK |-- (parse_datatype
254 ::: Scan.repeat (P.$$$ andK |-- parse_datatype))) []
255 -- Scan.optional (P.$$$ functionsK |-- Scan.repeat1 P.name) []
256 --| P.$$$ module_nameK -- P.name
257 -- Scan.option (P.$$$ fileK |-- P.name)
258 >> (fn (((raw_datatypes, raw_functions), module_name), some_file) => Toplevel.theory
259 (code_reflect_cmd raw_datatypes raw_functions module_name some_file)));
263 val setup = Code_Target.extend_target (target, (Code_ML.target_SML, K I));