tuned signature -- avoid intrusion of slightly odd Swing structures into pure Markup_Tree;
(* Title: Pure/PIDE/command.ML
Author: Makarius
Prover command execution.
*)
signature COMMAND =
sig
val range: Token.T list -> Position.range
val proper_range: Token.T list -> Position.range
type 'a memo
val memo: (unit -> 'a) -> 'a memo
val memo_value: 'a -> 'a memo
val memo_eval: 'a memo -> 'a
val memo_result: 'a memo -> 'a
val run_command: Toplevel.transition * Token.T list ->
Toplevel.state * bool -> (Toplevel.state * bool) * unit lazy
end;
structure Command: COMMAND =
struct
(* span range *)
val range = Token.position_range_of;
val proper_range = Token.position_range_of o #1 o take_suffix Token.is_improper;
(* memo results *)
datatype 'a expr =
Expr of unit -> 'a |
Result of 'a Exn.result;
abstype 'a memo = Memo of 'a expr Synchronized.var
with
fun memo e = Memo (Synchronized.var "Command.memo" (Expr e));
fun memo_value a = Memo (Synchronized.var "Command.memo" (Result (Exn.Res a)));
fun memo_eval (Memo v) =
(case Synchronized.value v of
Result res => res
| _ =>
Synchronized.guarded_access v
(fn Result res => SOME (res, Result res)
| Expr e =>
let val res = Exn.capture e (); (*memoing of physical interrupts!*)
in SOME (res, Result res) end))
|> Exn.release;
fun memo_result (Memo v) =
(case Synchronized.value v of
Result res => Exn.release res
| _ => raise Fail "Unfinished memo result");
end;
(* run command *)
local
fun run int tr st =
if Goal.future_enabled () andalso Keyword.is_diag (Toplevel.name_of tr) then
(Goal.fork_params {name = "Toplevel.diag", pos = Toplevel.pos_of tr, pri = ~1}
(fn () => Toplevel.command_exception int tr st); ([], SOME st))
else Toplevel.command_errors int tr st;
fun check_cmts tr cmts st =
Toplevel.setmp_thread_position tr
(fn () => cmts
|> maps (fn cmt =>
(Thy_Output.check_text (Token.source_position_of cmt) st; [])
handle exn => ML_Compiler.exn_messages_ids exn)) ();
fun proof_status tr st =
(case try Toplevel.proof_of st of
SOME prf => Toplevel.status tr (Proof.status_markup prf)
| NONE => ());
val no_print = Lazy.value ();
fun print_state tr st =
(Lazy.lazy o Toplevel.setmp_thread_position tr)
(fn () => Toplevel.print_state false st);
in
fun run_command (tr, cmts) (st, malformed) =
if malformed then ((Toplevel.toplevel, malformed), no_print)
else
let
val malformed' = Toplevel.is_malformed tr;
val is_init = Toplevel.is_init tr;
val is_proof = Keyword.is_proof (Toplevel.name_of tr);
val _ = Multithreading.interrupted ();
val _ = Toplevel.status tr Markup.running;
val (errs1, result) = run (is_init orelse is_proof) (Toplevel.set_print false tr) st;
val errs2 = (case result of NONE => [] | SOME st' => check_cmts tr cmts st');
val errs = errs1 @ errs2;
val _ = Toplevel.status tr Markup.finished;
val _ = List.app (Future.error_msg (Toplevel.pos_of tr)) errs;
in
(case result of
NONE =>
let
val _ = if null errs then Exn.interrupt () else ();
val _ = Toplevel.status tr Markup.failed;
in ((st, malformed'), no_print) end
| SOME st' =>
let
val _ = proof_status tr st';
val do_print =
not is_init andalso
(Toplevel.print_of tr orelse (is_proof andalso Toplevel.is_proof st'));
in ((st', malformed'), if do_print then print_state tr st' else no_print) end)
end;
end;
end;