1 (* Title: Pure/Isar/toplevel.ML
2 Author: Markus Wenzel, TU Muenchen
4 Isabelle/Isar toplevel transactions.
12 val theory_node: node -> generic_theory option
13 val proof_node: node -> ProofNode.T option
14 val cases_node: (generic_theory -> 'a) -> (Proof.state -> 'a) -> node -> 'a
15 val context_node: node -> Proof.context
16 val presentation_context: node option -> xstring option -> Proof.context
19 val is_toplevel: state -> bool
20 val is_theory: state -> bool
21 val is_proof: state -> bool
22 val level: state -> int
23 val previous_node_of: state -> node option
24 val node_of: state -> node
25 val node_case: (generic_theory -> 'a) -> (Proof.state -> 'a) -> state -> 'a
26 val context_of: state -> Proof.context
27 val generic_theory_of: state -> generic_theory
28 val theory_of: state -> theory
29 val proof_of: state -> Proof.state
30 val proof_position_of: state -> int
31 val enter_proof_body: state -> Proof.state
32 val print_state_context: state -> unit
33 val print_state: bool -> state -> unit
36 val interact: bool ref
38 val profiling: int ref
39 val skip_proofs: bool ref
41 exception TOPLEVEL_ERROR
42 exception CONTEXT of Proof.context * exn
43 val exn_message: exn -> string
44 val program: (unit -> 'a) -> 'a
47 val init_of: transition -> string option
48 val name_of: transition -> string
49 val pos_of: transition -> Position.T
50 val str_of: transition -> string
51 val name: string -> transition -> transition
52 val position: Position.T -> transition -> transition
53 val interactive: bool -> transition -> transition
54 val print: transition -> transition
55 val no_timing: transition -> transition
56 val init_theory: string -> (bool -> theory) -> (theory -> unit) -> transition -> transition
57 val exit: transition -> transition
58 val keep: (state -> unit) -> transition -> transition
59 val keep': (bool -> state -> unit) -> transition -> transition
60 val imperative: (unit -> unit) -> transition -> transition
61 val ignored: Position.T -> transition
62 val malformed: Position.T -> string -> transition
63 val theory: (theory -> theory) -> transition -> transition
64 val generic_theory: (generic_theory -> generic_theory) -> transition -> transition
65 val theory': (bool -> theory -> theory) -> transition -> transition
66 val begin_local_theory: bool -> (theory -> local_theory) -> transition -> transition
67 val end_local_theory: transition -> transition
68 val local_theory': xstring option -> (bool -> local_theory -> local_theory) ->
69 transition -> transition
70 val local_theory: xstring option -> (local_theory -> local_theory) -> transition -> transition
71 val present_local_theory: xstring option -> (node -> unit) -> transition -> transition
72 val local_theory_to_proof': xstring option -> (bool -> local_theory -> Proof.state) ->
73 transition -> transition
74 val local_theory_to_proof: xstring option -> (local_theory -> Proof.state) ->
75 transition -> transition
76 val theory_to_proof: (theory -> Proof.state) -> transition -> transition
77 val end_proof: (bool -> Proof.state -> Proof.context) -> transition -> transition
78 val forget_proof: transition -> transition
79 val present_proof: (node -> unit) -> transition -> transition
80 val proofs': (bool -> Proof.state -> Proof.state Seq.seq) -> transition -> transition
81 val proof': (bool -> Proof.state -> Proof.state) -> transition -> transition
82 val proofs: (Proof.state -> Proof.state Seq.seq) -> transition -> transition
83 val proof: (Proof.state -> Proof.state) -> transition -> transition
84 val actual_proof: (ProofNode.T -> ProofNode.T) -> transition -> transition
85 val skip_proof: (int -> int) -> transition -> transition
86 val skip_proof_to_theory: (int -> bool) -> transition -> transition
87 val get_id: transition -> string option
88 val put_id: string -> transition -> transition
89 val unknown_theory: transition -> transition
90 val unknown_proof: transition -> transition
91 val unknown_context: transition -> transition
92 val setmp_thread_position: transition -> ('a -> 'b) -> 'a -> 'b
93 val status: transition -> Markup.T -> unit
94 val error_msg: transition -> exn * string -> unit
95 val add_hook: (transition -> state -> state -> unit) -> unit
96 val transition: bool -> transition -> state -> (state * (exn * string) option) option
97 val commit_exit: Position.T -> transition
98 val command: transition -> state -> state
99 val run_command: string -> transition -> state -> state option
100 val excursion: (transition * transition list) list -> (transition * state) list lazy
103 structure Toplevel: TOPLEVEL =
106 (** toplevel state **)
111 (* local theory wrappers *)
113 type generic_theory = Context.generic; (*theory or local_theory*)
115 val loc_init = TheoryTarget.context;
116 val loc_exit = LocalTheory.exit_global;
118 fun loc_begin loc (Context.Theory thy) = loc_init (the_default "-" loc) thy
119 | loc_begin NONE (Context.Proof lthy) = lthy
120 | loc_begin (SOME loc) (Context.Proof lthy) = loc_init loc (loc_exit lthy);
122 fun loc_finish _ (Context.Theory _) = Context.Theory o loc_exit
123 | loc_finish NONE (Context.Proof _) = Context.Proof o LocalTheory.restore
124 | loc_finish (SOME _) (Context.Proof lthy) = fn lthy' =>
125 Context.Proof (LocalTheory.reinit (LocalTheory.raw_theory (K (loc_exit lthy')) lthy));
131 Theory of generic_theory * Proof.context option
132 (*theory with presentation context*) |
133 Proof of ProofNode.T * ((Proof.context -> generic_theory) * generic_theory)
134 (*proof node, finish, original theory*) |
135 SkipProof of int * (generic_theory * generic_theory);
136 (*proof depth, resulting theory, original theory*)
138 val the_global_theory = fn Theory (Context.Theory thy, _) => thy | _ => raise UNDEF;
139 val theory_node = fn Theory (gthy, _) => SOME gthy | _ => NONE;
140 val proof_node = fn Proof (prf, _) => SOME prf | _ => NONE;
142 fun cases_node f _ (Theory (gthy, _)) = f gthy
143 | cases_node _ g (Proof (prf, _)) = g (ProofNode.current prf)
144 | cases_node f _ (SkipProof (_, (gthy, _))) = f gthy;
146 val context_node = cases_node Context.proof_of Proof.context_of;
148 fun presentation_context (SOME (Theory (_, SOME ctxt))) NONE = ctxt
149 | presentation_context (SOME node) NONE = context_node node
150 | presentation_context (SOME node) (SOME loc) =
151 loc_init loc (cases_node Context.theory_of Proof.theory_of node)
152 | presentation_context NONE _ = raise UNDEF;
154 fun reset_presentation (Theory (gthy, _)) = Theory (gthy, NONE)
155 | reset_presentation node = node;
160 type node_info = node * (theory -> unit); (*node with exit operation*)
161 datatype state = State of node_info option * node_info option; (*current, previous*)
163 val toplevel = State (NONE, NONE);
165 fun is_toplevel (State (NONE, _)) = true
166 | is_toplevel _ = false;
168 fun level (State (NONE, _)) = 0
169 | level (State (SOME (Theory _, _), _)) = 0
170 | level (State (SOME (Proof (prf, _), _), _)) = Proof.level (ProofNode.current prf)
171 | level (State (SOME (SkipProof (d, _), _), _)) = d + 1; (*different notion of proof depth!*)
173 fun str_of_state (State (NONE, _)) = "at top level"
174 | str_of_state (State (SOME (Theory (Context.Theory _, _), _), _)) = "in theory mode"
175 | str_of_state (State (SOME (Theory (Context.Proof _, _), _), _)) = "in local theory mode"
176 | str_of_state (State (SOME (Proof _, _), _)) = "in proof mode"
177 | str_of_state (State (SOME (SkipProof _, _), _)) = "in skipped proof mode";
182 fun previous_node_of (State (_, prev)) = Option.map #1 prev;
184 fun node_of (State (NONE, _)) = raise UNDEF
185 | node_of (State (SOME (node, _), _)) = node;
187 fun is_theory state = not (is_toplevel state) andalso is_some (theory_node (node_of state));
188 fun is_proof state = not (is_toplevel state) andalso is_some (proof_node (node_of state));
190 fun node_case f g state = cases_node f g (node_of state);
192 val context_of = node_case Context.proof_of Proof.context_of;
193 val generic_theory_of = node_case I (Context.Proof o Proof.context_of);
194 val theory_of = node_case Context.theory_of Proof.theory_of;
195 val proof_of = node_case (fn _ => raise UNDEF) I;
197 fun proof_position_of state =
198 (case node_of state of
199 Proof (prf, _) => ProofNode.position prf
202 val enter_proof_body = node_case (Proof.init o Context.proof_of) Proof.enter_forward;
207 val pretty_context = LocalTheory.pretty o Context.cases (TheoryTarget.init NONE) I;
209 fun print_state_context state =
210 (case try node_of state of
212 | SOME (Theory (gthy, _)) => pretty_context gthy
213 | SOME (Proof (_, (_, gthy))) => pretty_context gthy
214 | SOME (SkipProof (_, (gthy, _))) => pretty_context gthy)
215 |> Pretty.chunks |> Pretty.writeln;
217 fun print_state prf_only state =
218 (case try node_of state of
220 | SOME (Theory (gthy, _)) => if prf_only then [] else pretty_context gthy
221 | SOME (Proof (prf, _)) =>
222 Proof.pretty_state (ProofNode.position prf) (ProofNode.current prf)
223 | SOME (SkipProof (d, _)) => [Pretty.str ("skipped proof: depth " ^ string_of_int d)])
224 |> Pretty.markup_chunks Markup.state |> Pretty.writeln;
228 (** toplevel transitions **)
230 val quiet = ref false;
231 val debug = Output.debugging;
232 val interact = ref false;
233 val timing = Output.timing;
234 val profiling = ref 0;
235 val skip_proofs = ref false;
238 exception EXCURSION_FAIL of exn * string;
239 exception FAILURE of state * exn;
240 exception TOPLEVEL_ERROR;
243 (* print exceptions *)
245 exception CONTEXT of Proof.context * exn;
247 fun exn_context NONE exn = exn
248 | exn_context (SOME ctxt) exn = CONTEXT (ctxt, exn);
252 fun if_context NONE _ _ = []
253 | if_context (SOME ctxt) f xs = map (f ctxt) xs;
255 fun raised name [] = "exception " ^ name ^ " raised"
256 | raised name [msg] = "exception " ^ name ^ " raised: " ^ msg
257 | raised name msgs = cat_lines (("exception " ^ name ^ " raised:") :: msgs);
263 val detailed = ! debug;
265 fun exn_msg _ (CONTEXT (ctxt, exn)) = exn_msg (SOME ctxt) exn
266 | exn_msg ctxt (Exn.EXCEPTIONS exns) = cat_lines (map (exn_msg ctxt) exns)
267 | exn_msg ctxt (EXCURSION_FAIL (exn, loc)) =
268 exn_msg ctxt exn ^ Markup.markup Markup.location ("\n" ^ loc)
269 | exn_msg _ TERMINATE = "Exit."
270 | exn_msg _ Exn.Interrupt = "Interrupt."
271 | exn_msg _ TimeLimit.TimeOut = "Timeout."
272 | exn_msg _ TOPLEVEL_ERROR = "Error."
273 | exn_msg _ (SYS_ERROR msg) = "## SYSTEM ERROR ##\n" ^ msg
274 | exn_msg _ (ERROR msg) = msg
275 | exn_msg _ (Fail msg) = raised "Fail" [msg]
276 | exn_msg _ (THEORY (msg, thys)) =
277 raised "THEORY" (msg :: (if detailed then map Context.str_of_thy thys else []))
278 | exn_msg _ (Syntax.AST (msg, asts)) = raised "AST" (msg ::
279 (if detailed then map (Pretty.string_of o Syntax.pretty_ast) asts else []))
280 | exn_msg ctxt (TYPE (msg, Ts, ts)) = raised "TYPE" (msg ::
282 if_context ctxt Syntax.string_of_typ Ts @ if_context ctxt Syntax.string_of_term ts
284 | exn_msg ctxt (TERM (msg, ts)) = raised "TERM" (msg ::
285 (if detailed then if_context ctxt Syntax.string_of_term ts else []))
286 | exn_msg ctxt (THM (msg, i, thms)) = raised ("THM " ^ string_of_int i) (msg ::
287 (if detailed then if_context ctxt ProofContext.string_of_thm thms else []))
288 | exn_msg _ exn = raised (General.exnMessage exn) []
289 in exn_msg NONE e end;
294 (* controlled execution *)
299 if ! debug then exception_trace (fn () => f x)
302 fun toplevel_error f x =
303 let val ctxt = try ML_Context.the_local_context () in
305 (Output.error_msg (exn_message (exn_context ctxt exn)); raise TOPLEVEL_ERROR)
310 fun controlled_execution f =
317 |> controlled_execution
318 |> toplevel_error) ();
323 (* node transactions -- maintaining stable checkpoints *)
327 fun is_draft_theory (Theory (gthy, _)) = Context.is_draft (Context.theory_of gthy)
328 | is_draft_theory _ = false;
330 fun is_stale state = Context.is_stale (theory_of state) handle UNDEF => false;
332 fun stale_error NONE = SOME (ERROR "Stale theory encountered after successful execution!")
333 | stale_error some = some;
335 fun map_theory f (Theory (gthy, ctxt)) =
336 Theory (Context.mapping f (LocalTheory.raw_theory f) gthy, ctxt)
337 | map_theory _ node = node;
341 fun apply_transaction pos f (node, exit) =
343 val _ = is_draft_theory node andalso error "Illegal draft theory in toplevel state";
344 val cont_node = reset_presentation node;
345 val back_node = map_theory (Theory.checkpoint o Theory.copy) cont_node;
346 fun state_error e nd = (State (SOME (nd, exit), SOME (node, exit)), e);
350 |> controlled_execution f
351 |> map_theory Theory.checkpoint
353 handle exn => state_error (SOME exn) cont_node;
355 val (result', err') =
356 if is_stale result then state_error (stale_error err) back_node
361 | SOME exn => raise FAILURE (result', exn))
367 (* primitive transitions *)
370 Init of string * (bool -> theory) * (theory -> unit) | (*theory name, init, exit*)
371 Exit | (*formal exit of theory -- without committing*)
372 CommitExit | (*exit and commit final theory*)
373 Keep of bool -> state -> unit | (*peek at state*)
374 Transaction of bool -> node -> node; (*node transaction*)
378 fun apply_tr int _ (Init (_, f, exit)) (State (NONE, _)) =
379 State (SOME (Theory (Context.Theory (Theory.checkpoint (f int)), NONE), exit), NONE)
380 | apply_tr _ _ Exit (State (prev as SOME (Theory (Context.Theory _, _), _), _)) =
382 | apply_tr _ _ CommitExit (State (NONE, SOME (Theory (Context.Theory thy, _), exit))) =
383 (controlled_execution exit thy; toplevel)
384 | apply_tr int _ (Keep f) state =
385 controlled_execution (fn x => tap (f int) x) state
386 | apply_tr int pos (Transaction f) (State (SOME state, _)) =
387 apply_transaction pos (fn x => f int x) state
388 | apply_tr _ _ _ _ = raise UNDEF;
390 fun apply_union _ _ [] state = raise FAILURE (state, UNDEF)
391 | apply_union int pos (tr :: trs) state =
392 apply_union int pos trs state
393 handle UNDEF => apply_tr int pos tr state
394 | FAILURE (alt_state, UNDEF) => apply_tr int pos tr alt_state
395 | exn as FAILURE _ => raise exn
396 | exn => raise FAILURE (state, exn);
400 fun apply_trans int pos trs state = (apply_union int pos trs state, NONE)
401 handle FAILURE (alt_state, exn) => (alt_state, SOME exn) | exn => (state, SOME exn);
406 (* datatype transition *)
408 datatype transition = Transition of
409 {name: string, (*command name*)
410 pos: Position.T, (*source position*)
411 int_only: bool, (*interactive-only*)
412 print: bool, (*print result state*)
413 no_timing: bool, (*suppress timing*)
414 trans: trans list}; (*primitive transitions (union)*)
416 fun make_transition (name, pos, int_only, print, no_timing, trans) =
417 Transition {name = name, pos = pos, int_only = int_only, print = print, no_timing = no_timing,
420 fun map_transition f (Transition {name, pos, int_only, print, no_timing, trans}) =
421 make_transition (f (name, pos, int_only, print, no_timing, trans));
423 val empty = make_transition ("", Position.none, false, false, false, []);
428 fun init_of (Transition {trans = [Init (name, _, _)], ...}) = SOME name
431 fun name_of (Transition {name, ...}) = name;
432 fun pos_of (Transition {pos, ...}) = pos;
433 fun str_of tr = quote (name_of tr) ^ Position.str_of (pos_of tr);
435 fun command_msg msg tr = msg ^ "command " ^ str_of tr;
436 fun at_command tr = command_msg "At " tr ^ ".";
438 fun type_error tr state =
439 ERROR (command_msg "Illegal application of " tr ^ " " ^ str_of_state state);
442 (* modify transitions *)
444 fun name name = map_transition (fn (_, pos, int_only, print, no_timing, trans) =>
445 (name, pos, int_only, print, no_timing, trans));
447 fun position pos = map_transition (fn (name, _, int_only, print, no_timing, trans) =>
448 (name, pos, int_only, print, no_timing, trans));
450 fun interactive int_only = map_transition (fn (name, pos, _, print, no_timing, trans) =>
451 (name, pos, int_only, print, no_timing, trans));
453 val no_timing = map_transition (fn (name, pos, int_only, print, _, trans) =>
454 (name, pos, int_only, print, true, trans));
456 fun add_trans tr = map_transition (fn (name, pos, int_only, print, no_timing, trans) =>
457 (name, pos, int_only, print, no_timing, tr :: trans));
459 val reset_trans = map_transition (fn (name, pos, int_only, print, no_timing, _) =>
460 (name, pos, int_only, print, no_timing, []));
462 fun set_print print = map_transition (fn (name, pos, int_only, _, no_timing, trans) =>
463 (name, pos, int_only, print, no_timing, trans));
465 val print = set_print true;
468 (* basic transitions *)
470 fun init_theory name f exit = add_trans (Init (name, f, exit));
471 val exit = add_trans Exit;
472 val keep' = add_trans o Keep;
473 fun transaction f = add_trans (Transaction f);
475 fun keep f = add_trans (Keep (fn _ => f));
476 fun imperative f = keep (fn _ => f ());
478 fun ignored pos = empty |> name "<ignored>" |> position pos |> imperative I;
479 fun malformed pos msg =
480 empty |> name "<malformed>" |> position pos |> imperative (fn () => error msg);
482 val unknown_theory = imperative (fn () => warning "Unknown theory context");
483 val unknown_proof = imperative (fn () => warning "Unknown proof context");
484 val unknown_context = imperative (fn () => warning "Unknown context");
487 (* theory transitions *)
489 fun generic_theory f = transaction (fn _ =>
490 (fn Theory (gthy, _) => Theory (f gthy, NONE)
491 | _ => raise UNDEF));
493 fun theory' f = transaction (fn int =>
494 (fn Theory (Context.Theory thy, _) => Theory (Context.Theory (f int thy), NONE)
495 | _ => raise UNDEF));
497 fun theory f = theory' (K f);
499 fun begin_local_theory begin f = transaction (fn _ =>
500 (fn Theory (Context.Theory thy, _) =>
503 val gthy = if begin then Context.Proof lthy else Context.Theory (loc_exit lthy);
504 in Theory (gthy, SOME lthy) end
505 | _ => raise UNDEF));
507 val end_local_theory = transaction (fn _ =>
508 (fn Theory (Context.Proof lthy, _) => Theory (Context.Theory (loc_exit lthy), SOME lthy)
509 | _ => raise UNDEF));
513 fun local_theory_presentation loc f g = transaction (fn int =>
514 (fn Theory (gthy, _) =>
516 val finish = loc_finish loc gthy;
517 val lthy' = f int (loc_begin loc gthy);
518 in Theory (finish lthy', SOME lthy') end
519 | _ => raise UNDEF) #> tap g);
523 fun local_theory' loc f = local_theory_presentation loc f (K I);
524 fun local_theory loc f = local_theory' loc (K f);
525 fun present_local_theory loc g = local_theory_presentation loc (K I) g;
530 (* proof transitions *)
532 fun end_proof f = transaction (fn int =>
533 (fn Proof (prf, (finish, _)) =>
534 let val state = ProofNode.current prf in
535 if can (Proof.assert_bottom true) state then
537 val ctxt' = f int state;
538 val gthy' = finish ctxt';
539 in Theory (gthy', SOME ctxt') end
542 | SkipProof (0, (gthy, _)) => Theory (gthy, NONE)
543 | _ => raise UNDEF));
547 fun begin_proof init finish = transaction (fn int =>
548 (fn Theory (gthy, _) =>
550 val prf = init int gthy;
551 val skip = ! skip_proofs;
552 val schematic = Proof.schematic_goal prf;
554 if skip andalso schematic then
555 warning "Cannot skip proof of schematic goal statement"
557 if skip andalso not schematic then
558 SkipProof (0, (finish gthy (Proof.global_skip_proof int prf), gthy))
559 else Proof (ProofNode.init prf, (finish gthy, gthy))
561 | _ => raise UNDEF));
565 fun local_theory_to_proof' loc f = begin_proof
566 (fn int => fn gthy => f int (loc_begin loc gthy))
569 fun local_theory_to_proof loc f = local_theory_to_proof' loc (K f);
571 fun theory_to_proof f = begin_proof
572 (K (fn Context.Theory thy => f thy | _ => raise UNDEF))
573 (K (Context.Theory o ProofContext.theory_of));
577 val forget_proof = transaction (fn _ =>
578 (fn Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
579 | SkipProof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
580 | _ => raise UNDEF));
582 fun present_proof f = transaction (fn _ =>
583 (fn Proof (prf, x) => Proof (ProofNode.apply I prf, x)
584 | skip as SkipProof _ => skip
585 | _ => raise UNDEF) #> tap f);
587 fun proofs' f = transaction (fn int =>
588 (fn Proof (prf, x) => Proof (ProofNode.applys (f int) prf, x)
589 | skip as SkipProof _ => skip
590 | _ => raise UNDEF));
592 fun proof' f = proofs' (Seq.single oo f);
593 val proofs = proofs' o K;
594 val proof = proof' o K;
596 fun actual_proof f = transaction (fn _ =>
597 (fn Proof (prf, x) => Proof (f prf, x)
598 | _ => raise UNDEF));
600 fun skip_proof f = transaction (fn _ =>
601 (fn SkipProof (h, x) => SkipProof (f h, x)
602 | _ => raise UNDEF));
604 fun skip_proof_to_theory pred = transaction (fn _ =>
605 (fn SkipProof (d, (gthy, _)) => if pred d then Theory (gthy, NONE) else raise UNDEF
606 | _ => raise UNDEF));
610 (** toplevel transactions **)
614 fun get_id (Transition {pos, ...}) = Position.get_id pos;
615 fun put_id id (tr as Transition {pos, ...}) = position (Position.put_id id pos) tr;
618 (* thread position *)
620 fun setmp_thread_position (Transition {pos, ...}) f x =
621 Position.setmp_thread_data pos f x;
624 setmp_thread_position tr (fn () => Output.status (Markup.markup m "")) ();
626 fun error_msg tr exn_info =
627 setmp_thread_position tr (fn () => Output.error_msg (exn_message (EXCURSION_FAIL exn_info))) ();
630 (* post-transition hooks *)
632 local val hooks = ref ([]: (transition -> state -> state -> unit) list) in
634 fun add_hook f = CRITICAL (fn () => change hooks (cons f));
635 fun get_hooks () = CRITICAL (fn () => ! hooks);
640 (* apply transitions *)
644 fun app int (tr as Transition {trans, pos, int_only, print, no_timing, ...}) =
645 setmp_thread_position tr (fn state =>
647 val _ = if not int andalso int_only then warning (command_msg "Interactive-only " tr) else ();
649 fun do_timing f x = (warning (command_msg "" tr); timeap f x);
650 fun do_profiling f x = profile (! profiling) f x;
652 val (result, status) =
653 state |> (apply_trans int pos trans
654 |> (if ! profiling > 0 andalso not no_timing then do_profiling else I)
655 |> (if ! profiling > 0 orelse ! timing andalso not no_timing then do_timing else I));
657 val _ = if int andalso not (! quiet) andalso print then print_state false result else ();
658 in (result, Option.map (fn UNDEF => type_error tr state | exn => exn) status) end);
662 fun transition int tr st =
664 val hooks = get_hooks ();
665 fun apply_hooks st' = hooks |> List.app (fn f => (try (fn () => f tr st st') (); ()));
667 val ctxt = try context_of st;
669 (case app int tr st of
670 (_, SOME TERMINATE) => NONE
671 | (st', SOME (EXCURSION_FAIL exn_info)) => SOME (st', SOME exn_info)
672 | (st', SOME exn) => SOME (st', SOME (exn_context ctxt exn, at_command tr))
673 | (st', NONE) => SOME (st', NONE));
674 val _ = (case res of SOME (st', NONE) => apply_hooks st' | _ => ());
680 (* commit final exit *)
682 fun commit_exit pos =
685 |> add_trans CommitExit
686 |> imperative (fn () => warning "Expected to find finished theory");
689 (* nested commands *)
692 (case transition (! interact) tr st of
693 SOME (st', NONE) => st'
694 | SOME (_, SOME exn_info) => raise EXCURSION_FAIL exn_info
695 | NONE => raise EXCURSION_FAIL (TERMINATE, at_command tr));
697 fun command_result tr st =
698 let val st' = command tr st
701 fun run_command thy_name tr st =
704 SOME name => Exn.capture (fn () => ThyLoad.check_name thy_name name) ()
705 | NONE => Exn.Result ()) of
707 (case transition true tr st of
708 SOME (st', NONE) => (status tr Markup.finished; SOME st')
709 | SOME (_, SOME exn_info) => (error_msg tr exn_info; status tr Markup.failed; NONE)
710 | NONE => (error_msg tr (TERMINATE, at_command tr); status tr Markup.failed; NONE))
711 | Exn.Exn exn => (error_msg tr (exn, at_command tr); status tr Markup.failed; NONE));
714 (* excursion of units, consisting of commands with proof *)
716 structure States = ProofDataFun
718 type T = state list future option;
722 fun proof_result immediate (tr, proof_trs) st =
723 let val st' = command tr st in
724 if immediate orelse null proof_trs orelse
725 not (can proof_of st') orelse Proof.is_relevant (proof_of st')
727 let val (states, st'') = fold_map command_result proof_trs st'
728 in (Lazy.value ((tr, st') :: (proof_trs ~~ states)), st'') end
731 val (body_trs, end_tr) = split_last proof_trs;
732 val finish = Context.Theory o ProofContext.theory_of;
734 val future_proof = Proof.global_future_proof
736 Future.fork_pri ~1 (fn () =>
737 let val (states, State (result_node, _)) =
738 (case st' of State (SOME (Proof (_, (_, orig_gthy)), exit), prev)
739 => State (SOME (Proof (ProofNode.init prf, (finish, orig_gthy)), exit), prev))
740 |> fold_map command_result body_trs
741 ||> command (end_tr |> set_print false);
742 in (states, presentation_context (Option.map #1 result_node) NONE) end))
743 #> (fn (states, ctxt) => States.put (SOME states) ctxt);
745 val st'' = st' |> command (end_tr |> reset_trans |> end_proof (K future_proof));
748 (case States.get (presentation_context (SOME (node_of st'')) NONE) of
749 NONE => sys_error ("No future states for " ^ name_of tr ^ Position.str_of (pos_of tr))
750 | SOME states => states);
751 val result = Lazy.lazy
752 (fn () => (tr, st') :: (body_trs ~~ Future.join states) @ [(end_tr, st'')]);
754 in (result, st'') end
757 fun excursion input =
759 val end_pos = if null input then error "No input" else pos_of (fst (List.last input));
761 val immediate = not (Goal.future_enabled ());
762 val (results, end_state) = fold_map (proof_result immediate) input toplevel;
765 State (NONE, SOME (Theory (Context.Theory _, _), _)) =>
766 command (commit_exit end_pos) end_state
767 | _ => error "Unfinished development at end of input");
768 in Lazy.lazy (fn () => maps Lazy.force results) end;