(* Title: Tools/code/code_eval.ML_
Author: Florian Haftmann, TU Muenchen
Runtime services building on code generation into implementation language SML.
*)
signature CODE_EVAL =
sig
val target: string
val eval: string option -> string * (unit -> 'a) option Unsynchronized.ref
-> ((term -> term) -> 'a -> 'a) -> theory -> term -> string list -> 'a
val evaluation_code: theory -> string list -> string list
-> string * ((string * string) list * (string * string) list)
val setup: theory -> theory
end;
structure Code_Eval : CODE_EVAL =
struct
(** generic **)
val target = "Eval";
val eval_struct_name = "Code";
fun evaluation_code thy tycos consts =
let
val (consts', (naming, program)) = Code_Thingol.consts_program thy consts;
val tycos' = map (the o Code_Thingol.lookup_tyco naming) tycos;
val (ml_code, target_names) = Code_ML.evaluation_code_of thy target
eval_struct_name naming program (consts' @ tycos');
val (consts'', tycos'') = chop (length consts') target_names;
val consts_map = map2 (fn const => fn NONE =>
error ("Constant " ^ (quote o Code.string_of_const thy) const
^ "\nhas a user-defined serialization")
| SOME const'' => (const, const'')) consts consts''
val tycos_map = map2 (fn tyco => fn NONE =>
error ("Type " ^ (quote o Sign.extern_type thy) tyco
^ "\nhas a user-defined serialization")
| SOME tyco'' => (tyco, tyco'')) tycos tycos'';
in (ml_code, (tycos_map, consts_map)) end;
(** evaluation **)
fun eval some_target reff postproc thy t args =
let
val ctxt = ProofContext.init thy;
fun evaluator naming program ((_, (_, ty)), t) deps =
let
val _ = if Code_Thingol.contains_dictvar t then
error "Term to be evaluated contains free dictionaries" else ();
val value_name = "Value.VALUE.value"
val program' = program
|> Graph.new_node (value_name,
Code_Thingol.Fun (Term.dummy_patternN, (([], ty), [(([], t), (Drule.dummy_thm, true))])))
|> fold (curry Graph.add_edge value_name) deps;
val (value_code, [SOME value_name']) = Code_ML.evaluation_code_of thy
(the_default target some_target) "" naming program' [value_name];
val sml_code = "let\n" ^ value_code ^ "\nin " ^ value_name'
^ space_implode " " (map (enclose "(" ")") args) ^ " end";
in ML_Context.evaluate ctxt false reff sml_code end;
in Code_Thingol.eval thy postproc evaluator t end;
(** instrumentalization by antiquotation **)
local
structure CodeAntiqData = Proof_Data
(
type T = (string list * string list) * (bool * (string
* (string * ((string * string) list * (string * string) list)) lazy));
fun init _ = (([], []), (true, ("", Lazy.value ("", ([], [])))));
);
val is_first_occ = fst o snd o CodeAntiqData.get;
fun register_code new_tycos new_consts ctxt =
let
val ((tycos, consts), (_, (struct_name, _))) = CodeAntiqData.get ctxt;
val tycos' = fold (insert (op =)) new_tycos tycos;
val consts' = fold (insert (op =)) new_consts consts;
val (struct_name', ctxt') = if struct_name = ""
then ML_Antiquote.variant eval_struct_name ctxt
else (struct_name, ctxt);
val acc_code = Lazy.lazy (fn () => evaluation_code (ProofContext.theory_of ctxt) tycos' consts');
in CodeAntiqData.put ((tycos', consts'), (false, (struct_name', acc_code))) ctxt' end;
fun register_const const = register_code [] [const];
fun register_datatype tyco constrs = register_code [tyco] constrs;
fun print_const const all_struct_name tycos_map consts_map =
(Long_Name.append all_struct_name o the o AList.lookup (op =) consts_map) const;
fun print_datatype tyco constrs all_struct_name tycos_map consts_map =
let
val upperize = implode o nth_map 0 Symbol.to_ascii_upper o explode;
fun check_base name name'' =
if upperize (Long_Name.base_name name) = upperize name''
then () else error ("Name as printed " ^ quote name''
^ "\ndiffers from logical base name " ^ quote (Long_Name.base_name name) ^ "; sorry.");
val tyco'' = (the o AList.lookup (op =) tycos_map) tyco;
val constrs'' = map (the o AList.lookup (op =) consts_map) constrs;
val _ = check_base tyco tyco'';
val _ = map2 check_base constrs constrs'';
in "datatype " ^ tyco'' ^ " = datatype " ^ Long_Name.append all_struct_name tyco'' end;
fun print_code struct_name is_first print_it ctxt =
let
val (_, (_, (struct_code_name, acc_code))) = CodeAntiqData.get ctxt;
val (ml_code, (tycos_map, consts_map)) = Lazy.force acc_code;
val ml_code = if is_first then ml_code
else "";
val all_struct_name = Long_Name.append struct_name struct_code_name;
in (ml_code, print_it all_struct_name tycos_map consts_map) end;
in
fun ml_code_antiq raw_const {struct_name, background} =
let
val const = Code.check_const (ProofContext.theory_of background) raw_const;
val is_first = is_first_occ background;
val background' = register_const const background;
in (print_code struct_name is_first (print_const const), background') end;
fun ml_code_datatype_antiq (raw_tyco, raw_constrs) {struct_name, background} =
let
val thy = ProofContext.theory_of background;
val tyco = Sign.intern_type thy raw_tyco;
val constrs = map (Code.check_const thy) raw_constrs;
val constrs' = (map fst o snd o Code.get_datatype thy) tyco;
val _ = if eq_set (op =) (constrs, constrs') then ()
else error ("Type " ^ quote tyco ^ ": given constructors diverge from real constructors")
val is_first = is_first_occ background;
val background' = register_datatype tyco constrs background;
in (print_code struct_name is_first (print_datatype tyco constrs), background') end;
end; (*local*)
(** Isar setup **)
val _ = ML_Context.add_antiq "code" (fn _ => Args.term >> ml_code_antiq);
val _ = ML_Context.add_antiq "code_datatype" (fn _ =>
(Args.tyname --| Scan.lift (Args.$$$ "=")
-- (Args.term ::: Scan.repeat (Scan.lift (Args.$$$ "|") |-- Args.term)))
>> ml_code_datatype_antiq);
val setup = Code_Target.extend_target (target, (Code_ML.target_SML, K I));
end; (*struct*)