print "persistent" flag allows to adjust tradeoff of ML run-time vs. JVM heap-space;
1 (* Title: Pure/PIDE/command.ML
4 Prover command execution: read -- eval -- print.
10 type eval = {exec_id: Document_ID.exec, eval_process: eval_process}
11 val eval_result_state: eval -> Toplevel.state
14 {name: string, pri: int, persistent: bool,
15 exec_id: Document_ID.exec, print_process: print_process}
16 type exec = eval * print list
18 val exec_ids: exec option -> Document_ID.exec list
19 val stable_eval: eval -> bool
20 val stable_print: print -> bool
21 val read: (unit -> theory) -> Token.T list -> Toplevel.transition
22 val eval: (unit -> theory) -> Token.T list -> eval -> eval
23 val print: bool -> string -> eval -> print list -> print list option
24 type print_fn = Toplevel.transition -> Toplevel.state -> unit
25 val print_function: {name: string, pri: int, persistent: bool} ->
26 ({command_name: string} -> print_fn option) -> unit
27 val no_print_function: string -> unit
28 val execute: exec -> unit
31 structure Command: COMMAND =
34 (** memo results -- including physical interrupts! **)
38 Result of 'a Exn.result;
40 abstype 'a memo = Memo of 'a expr Synchronized.var
43 fun memo e = Memo (Synchronized.var "Command.memo" (Expr e));
44 fun memo_value a = Memo (Synchronized.var "Command.memo" (Result (Exn.Res a)));
46 fun memo_eval (Memo v) =
47 (case Synchronized.value v of
50 Synchronized.guarded_access v
51 (fn Result res => SOME (res, Result res)
53 let val res = Exn.capture e (); (*sic!*)
54 in SOME (res, Result res) end))
57 fun memo_fork params (Memo v) =
58 (case Synchronized.value v of
60 | _ => ignore ((singleton o Future.forks) params (fn () => memo_eval (Memo v))));
62 fun memo_result (Memo v) =
63 (case Synchronized.value v of
64 Result res => Exn.release res
65 | _ => raise Fail "Unfinished memo result");
67 fun memo_stable (Memo v) =
68 (case Synchronized.value v of
70 | Result res => not (Exn.is_interrupt_exn res));
76 (** main phases of execution **)
78 (* basic type definitions *)
81 {failed: bool, malformed: bool, command: Toplevel.transition, state: Toplevel.state};
83 {failed = false, malformed = false, command = Toplevel.empty, state = Toplevel.toplevel};
85 type eval_process = eval_state memo;
86 type eval = {exec_id: Document_ID.exec, eval_process: eval_process};
88 fun eval_result ({eval_process, ...}: eval) = memo_result eval_process;
89 val eval_result_state = #state o eval_result;
91 type print_process = unit memo;
93 {name: string, pri: int, persistent: bool,
94 exec_id: Document_ID.exec, print_process: print_process};
96 type exec = eval * print list;
97 val no_exec: exec = ({exec_id = Document_ID.none, eval_process = memo_value init_eval_state}, []);
99 fun exec_ids (NONE: exec option) = []
100 | exec_ids (SOME ({exec_id, ...}, prints)) = exec_id :: map #exec_id prints;
105 fun stable_goals exec_id =
106 not (Par_Exn.is_interrupted (Future.join_results (Goal.peek_futures exec_id)));
108 fun stable_eval ({exec_id, eval_process}: eval) =
109 stable_goals exec_id andalso memo_stable eval_process;
111 fun stable_print ({exec_id, print_process, ...}: print) =
112 stable_goals exec_id andalso memo_stable print_process;
119 val outer_syntax = #2 (Outer_Syntax.get_syntax ());
120 val command_reports = Outer_Syntax.command_reports outer_syntax;
123 Position.set_range (Token.position_range_of (#1 (take_suffix Token.is_improper span)));
125 (case find_first Token.is_command span of
126 SOME tok => Token.position_of tok
127 | NONE => proper_range);
129 val (is_malformed, token_reports) = Thy_Syntax.reports_of_tokens span;
130 val _ = Position.reports_text (token_reports @ maps command_reports span);
132 if is_malformed then Toplevel.malformed pos "Malformed command syntax"
134 (case Outer_Syntax.read_spans outer_syntax span of
136 if Keyword.is_control (Toplevel.name_of tr) then
137 Toplevel.malformed pos "Illegal control command"
138 else Toplevel.modify_init init tr
139 | [] => Toplevel.ignored (Position.set_range (Token.position_range_of span))
140 | _ => Toplevel.malformed proper_range "Exactly one command expected")
141 handle ERROR msg => Toplevel.malformed proper_range msg
150 if Goal.future_enabled () andalso Keyword.is_diag (Toplevel.name_of tr) then
151 (Goal.fork_params {name = "Toplevel.diag", pos = Toplevel.pos_of tr, pri = ~1}
152 (fn () => Toplevel.command_exception int tr st); ([], SOME st))
153 else Toplevel.command_errors int tr st;
155 fun check_cmts span tr st' =
156 Toplevel.setmp_thread_position tr
158 Outer_Syntax.side_comments span |> maps (fn cmt =>
159 (Thy_Output.check_text (Token.source_position_of cmt) st'; [])
160 handle exn => ML_Compiler.exn_messages_ids exn)) ();
162 fun proof_status tr st =
163 (case try Toplevel.proof_of st of
164 SOME prf => Toplevel.status tr (Proof.status_markup prf)
167 fun eval_state span tr ({malformed, state = st, ...}: eval_state) =
169 {failed = true, malformed = malformed, command = tr, state = Toplevel.toplevel}
172 val malformed' = Toplevel.is_malformed tr;
173 val is_init = Toplevel.is_init tr;
174 val is_proof = Keyword.is_proof (Toplevel.name_of tr);
176 val _ = Multithreading.interrupted ();
177 val _ = Toplevel.status tr Markup.running;
178 val (errs1, result) = run (is_init orelse is_proof) (Toplevel.set_print false tr) st;
179 val errs2 = (case result of NONE => [] | SOME st' => check_cmts span tr st');
180 val errs = errs1 @ errs2;
181 val _ = Toplevel.status tr Markup.finished;
182 val _ = List.app (Future.error_msg (Toplevel.pos_of tr)) errs;
187 val _ = if null errs then Exn.interrupt () else ();
188 val _ = Toplevel.status tr Markup.failed;
189 in {failed = true, malformed = malformed', command = tr, state = st} end
192 val _ = proof_status tr st';
193 in {failed = false, malformed = malformed', command = tr, state = st'} end)
198 fun eval init span eval0 =
200 val exec_id = Document_ID.make ();
204 Position.setmp_thread_data (Position.id_only (Document_ID.print exec_id))
205 (fn () => read init span |> Toplevel.exec_id exec_id) ();
206 in eval_state span tr (eval_result eval0) end;
207 in {exec_id = exec_id, eval_process = memo process} end;
214 type print_fn = Toplevel.transition -> Toplevel.state -> unit;
218 type print_function = string * (int * bool * ({command_name: string} -> print_fn option));
219 val print_functions = Synchronized.var "Command.print_functions" ([]: print_function list);
221 fun print_error tr e =
222 (Toplevel.setmp_thread_position tr o Runtime.controlled_execution) e () handle exn =>
223 List.app (Future.error_msg (Toplevel.pos_of tr)) (ML_Compiler.exn_messages_ids exn);
227 fun print command_visible command_name eval old_prints =
229 fun new_print (name, (pri, persistent, get_fn)) =
231 fun make_print strict print_fn =
233 val exec_id = Document_ID.make ();
236 val {failed, command, state = st', ...} = eval_result eval;
237 val tr = Toplevel.exec_id exec_id command;
239 if failed andalso not strict then ()
240 else print_error tr (fn () => print_fn tr st')
243 {name = name, pri = pri, persistent = persistent,
244 exec_id = exec_id, print_process = memo process}
247 (case Exn.capture (Runtime.controlled_execution get_fn) {command_name = command_name} of
249 | Exn.Res (SOME print_fn) => SOME (make_print false print_fn)
250 | Exn.Exn exn => SOME (make_print true (fn _ => fn _ => reraise exn)))
254 if command_visible then
255 rev (Synchronized.value print_functions) |> map_filter (fn pr =>
256 (case find_first (equal (fst pr) o #name) old_prints of
257 SOME print => if stable_print print then SOME print else new_print pr
258 | NONE => new_print pr))
259 else filter (fn print => #persistent print andalso stable_print print) old_prints;
261 if eq_list (op = o pairself #exec_id) (old_prints, new_prints) then NONE
265 fun print_function {name, pri, persistent} f =
266 Synchronized.change print_functions (fn funs =>
267 (if not (AList.defined (op =) funs name) then ()
268 else warning ("Redefining command print function: " ^ quote name);
269 AList.update (op =) (name, (pri, persistent, f)) funs));
271 fun no_print_function name =
272 Synchronized.change print_functions (filter_out (equal name o #1));
277 print_function {name = "print_state", pri = 0, persistent = true}
278 (fn {command_name} => SOME (fn tr => fn st' =>
280 val is_init = Keyword.is_theory_begin command_name;
281 val is_proof = Keyword.is_proof command_name;
284 (Toplevel.print_of tr orelse (is_proof andalso Toplevel.is_proof st'));
285 in if do_print then Toplevel.print_state false st' else () end));
288 (* overall execution process *)
290 fun run_print ({name, pri, print_process, ...}: print) =
291 (if Multithreading.enabled () then
292 memo_fork {name = name, group = NONE, deps = [], pri = pri, interrupts = true}
293 else memo_eval) print_process;
295 fun execute (({eval_process, ...}, prints): exec) =
296 (memo_eval eval_process; List.app run_print prints);