1 (* Title: Pure/PIDE/command.ML
4 Prover command execution.
9 type span = Token.T list
10 val range: span -> Position.range
11 val proper_range: span -> Position.range
13 val memo: (unit -> 'a) -> 'a memo
14 val memo_value: 'a -> 'a memo
15 val memo_eval: 'a memo -> 'a
16 val memo_fork: Future.params -> 'a memo -> unit
17 val memo_result: 'a memo -> 'a
18 val memo_stable: 'a memo -> bool
19 val read: span -> Toplevel.transition
21 {failed: bool, malformed: bool, command: Toplevel.transition, state: Toplevel.state}
22 type eval = {exec_id: Document_ID.exec, eval: eval_state memo}
24 val eval_result: eval -> eval_state
25 val eval: span -> Toplevel.transition -> eval_state -> eval_state
26 type print_fn = Toplevel.transition -> Toplevel.state -> unit
27 type print = {name: string, pri: int, exec_id: Document_ID.exec, print: unit memo}
28 val print: string -> eval -> print list
29 val print_function: {name: string, pri: int} -> (string -> print_fn option) -> unit
30 type exec = eval * print list
32 val exec_ids: exec -> Document_ID.exec list
33 val exec_result: exec -> eval_state
34 val exec_run: exec -> unit
35 val stable_eval: eval -> bool
36 val stable_print: print -> bool
39 structure Command: COMMAND =
44 type span = Token.T list;
46 val range = Token.position_range_of;
47 val proper_range = Token.position_range_of o #1 o take_suffix Token.is_improper;
54 Result of 'a Exn.result;
56 abstype 'a memo = Memo of 'a expr Synchronized.var
59 fun memo e = Memo (Synchronized.var "Command.memo" (Expr e));
60 fun memo_value a = Memo (Synchronized.var "Command.memo" (Result (Exn.Res a)));
62 fun memo_eval (Memo v) =
63 (case Synchronized.value v of
66 Synchronized.guarded_access v
67 (fn Result res => SOME (res, Result res)
69 let val res = Exn.capture e (); (*memoing of physical interrupts!*)
70 in SOME (res, Result res) end))
73 fun memo_fork params (Memo v) =
74 (case Synchronized.value v of
76 | _ => ignore ((singleton o Future.forks) params (fn () => memo_eval (Memo v))));
78 fun memo_result (Memo v) =
79 (case Synchronized.value v of
80 Result res => Exn.release res
81 | _ => raise Fail "Unfinished memo result");
83 fun memo_stable (Memo v) =
84 (case Synchronized.value v of
86 | Result res => not (Exn.is_interrupt_exn res));
91 (** main phases: read -- eval -- print **)
97 val outer_syntax = #2 (Outer_Syntax.get_syntax ());
98 val command_reports = Outer_Syntax.command_reports outer_syntax;
100 val proper_range = Position.set_range (proper_range span);
102 (case find_first Token.is_command span of
103 SOME tok => Token.position_of tok
104 | NONE => proper_range);
106 val (is_malformed, token_reports) = Thy_Syntax.reports_of_tokens span;
107 val _ = Position.reports_text (token_reports @ maps command_reports span);
109 if is_malformed then Toplevel.malformed pos "Malformed command syntax"
111 (case Outer_Syntax.read_spans outer_syntax span of
113 if Keyword.is_control (Toplevel.name_of tr) then
114 Toplevel.malformed pos "Illegal control command"
116 | [] => Toplevel.ignored (Position.set_range (range span))
117 | _ => Toplevel.malformed proper_range "Exactly one command expected")
118 handle ERROR msg => Toplevel.malformed proper_range msg
125 {failed: bool, malformed: bool, command: Toplevel.transition, state: Toplevel.state};
126 val no_eval_state: eval_state =
127 {failed = false, malformed = false, command = Toplevel.empty, state = Toplevel.toplevel};
129 type eval = {exec_id: Document_ID.exec, eval: eval_state memo};
131 val no_eval: eval = {exec_id = Document_ID.none, eval = memo_value no_eval_state};
132 fun eval_result ({eval, ...}: eval) = memo_result eval;
137 if Goal.future_enabled () andalso Keyword.is_diag (Toplevel.name_of tr) then
138 (Goal.fork_params {name = "Toplevel.diag", pos = Toplevel.pos_of tr, pri = ~1}
139 (fn () => Toplevel.command_exception int tr st); ([], SOME st))
140 else Toplevel.command_errors int tr st;
142 fun check_cmts span tr st' =
143 Toplevel.setmp_thread_position tr
145 Outer_Syntax.side_comments span |> maps (fn cmt =>
146 (Thy_Output.check_text (Token.source_position_of cmt) st'; [])
147 handle exn => ML_Compiler.exn_messages_ids exn)) ();
149 fun proof_status tr st =
150 (case try Toplevel.proof_of st of
151 SOME prf => Toplevel.status tr (Proof.status_markup prf)
156 fun eval span tr ({malformed, state = st, ...}: eval_state) =
158 {failed = true, malformed = malformed, command = tr, state = Toplevel.toplevel}
161 val malformed' = Toplevel.is_malformed tr;
162 val is_init = Toplevel.is_init tr;
163 val is_proof = Keyword.is_proof (Toplevel.name_of tr);
165 val _ = Multithreading.interrupted ();
166 val _ = Toplevel.status tr Markup.running;
167 val (errs1, result) = run (is_init orelse is_proof) (Toplevel.set_print false tr) st;
168 val errs2 = (case result of NONE => [] | SOME st' => check_cmts span tr st');
169 val errs = errs1 @ errs2;
170 val _ = Toplevel.status tr Markup.finished;
171 val _ = List.app (Future.error_msg (Toplevel.pos_of tr)) errs;
176 val _ = if null errs then Exn.interrupt () else ();
177 val _ = Toplevel.status tr Markup.failed;
178 in {failed = true, malformed = malformed', command = tr, state = st} end
181 val _ = proof_status tr st';
182 in {failed = false, malformed = malformed', command = tr, state = st'} end)
190 type print = {name: string, pri: int, exec_id: Document_ID.exec, print: unit memo};
191 type print_fn = Toplevel.transition -> Toplevel.state -> unit;
195 type print_function = string * (int * (string -> print_fn option));
196 val print_functions = Synchronized.var "Command.print_functions" ([]: print_function list);
198 fun output_error tr exn =
199 List.app (Future.error_msg (Toplevel.pos_of tr)) (ML_Compiler.exn_messages_ids exn);
201 fun print_error tr f x =
202 (Toplevel.setmp_thread_position tr o Runtime.controlled_execution) f x
203 handle exn => output_error tr exn;
207 fun print command_name eval =
208 rev (Synchronized.value print_functions) |> map_filter (fn (name, (pri, get_print_fn)) =>
209 (case Exn.capture (Runtime.controlled_execution get_print_fn) command_name of
211 | Exn.Res (SOME print_fn) =>
213 val exec_id = Document_ID.make ();
216 val {failed, command, state = st', ...} = eval_result eval;
217 val tr = Toplevel.put_id exec_id command;
218 in if failed then () else print_error tr (fn () => print_fn tr st') () end;
219 in SOME {name = name, pri = pri, exec_id = exec_id, print = memo body} end
222 val exec_id = Document_ID.make ();
225 val {command, ...} = eval_result eval;
226 val tr = Toplevel.put_id exec_id command;
227 in output_error tr exn end;
228 in SOME {name = name, pri = pri, exec_id = exec_id, print = memo body} end));
230 fun print_function {name, pri} f =
231 Synchronized.change print_functions (fn funs =>
232 (if not (AList.defined (op =) funs name) then ()
233 else warning ("Redefining command print function: " ^ quote name);
234 AList.update (op =) (name, (pri, f)) funs));
239 print_function {name = "print_state", pri = 0} (fn command_name => SOME (fn tr => fn st' =>
241 val is_init = Keyword.is_theory_begin command_name;
242 val is_proof = Keyword.is_proof command_name;
245 (Toplevel.print_of tr orelse (is_proof andalso Toplevel.is_proof st'));
246 in if do_print then Toplevel.print_state false st' else () end));
250 (** managed evaluation **)
254 type exec = eval * print list;
255 val no_exec: exec = (no_eval, []);
257 fun exec_ids (({exec_id, ...}, prints): exec) = exec_id :: map #exec_id prints;
259 fun exec_result (({eval, ...}, _): exec) = memo_result eval;
261 fun exec_run (({eval, ...}, prints): exec) =
263 prints |> List.app (fn {name, pri, print, ...} =>
264 memo_fork {name = name, group = NONE, deps = [], pri = pri, interrupts = true} print));
267 (* stable situations after cancellation *)
269 fun stable_goals exec_id =
270 not (Par_Exn.is_interrupted (Future.join_results (Goal.peek_futures exec_id)));
272 fun stable_eval ({exec_id, eval}: eval) =
273 stable_goals exec_id andalso memo_stable eval;
275 fun stable_print ({exec_id, print, ...}: print) =
276 stable_goals exec_id andalso memo_stable print;