src/Pure/Isar/toplevel.ML
author wenzelm
Sun Aug 25 20:32:26 2013 +0200 (2013-08-25 ago)
changeset 53192 04df1d236e1c
parent 53189 ee8b8dafef0e
child 53403 c09f4005d6bd
permissions -rw-r--r--
maintain goal forks as part of global execution;
tuned;
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(*  Title:      Pure/Isar/toplevel.ML
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    Author:     Markus Wenzel, TU Muenchen
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Isabelle/Isar toplevel transactions.
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*)
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signature TOPLEVEL =
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sig
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  exception UNDEF
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  type state
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  val toplevel: state
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  val is_toplevel: state -> bool
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  val is_theory: state -> bool
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  val is_proof: state -> bool
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  val is_skipped_proof: state -> bool
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  val level: state -> int
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  val presentation_context_of: state -> Proof.context
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  val previous_context_of: state -> Proof.context option
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  val context_of: state -> Proof.context
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  val generic_theory_of: state -> generic_theory
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  val theory_of: state -> theory
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  val proof_of: state -> Proof.state
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  val proof_position_of: state -> int
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  val end_theory: Position.T -> state -> theory
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  val print_state_context: state -> unit
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  val print_state: bool -> state -> unit
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  val pretty_abstract: state -> Pretty.T
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  val quiet: bool Unsynchronized.ref
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  val debug: bool Unsynchronized.ref
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  val interact: bool Unsynchronized.ref
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  val timing: bool Unsynchronized.ref
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  val profiling: int Unsynchronized.ref
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  val program: (unit -> 'a) -> 'a
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  val thread: bool -> (unit -> unit) -> Thread.thread
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  type transition
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  val empty: transition
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  val print_of: transition -> bool
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  val name_of: transition -> string
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  val pos_of: transition -> Position.T
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  val name: string -> transition -> transition
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  val position: Position.T -> transition -> transition
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  val interactive: bool -> transition -> transition
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  val set_print: bool -> transition -> transition
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  val print: transition -> transition
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  val init_theory: (unit -> theory) -> transition -> transition
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  val is_init: transition -> bool
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  val modify_init: (unit -> theory) -> transition -> transition
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  val exit: transition -> transition
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  val keep: (state -> unit) -> transition -> transition
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  val keep': (bool -> state -> unit) -> transition -> transition
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  val imperative: (unit -> unit) -> transition -> transition
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  val ignored: Position.T -> transition
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  val is_ignored: transition -> bool
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  val malformed: Position.T -> string -> transition
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  val is_malformed: transition -> bool
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  val generic_theory: (generic_theory -> generic_theory) -> transition -> transition
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  val theory': (bool -> theory -> theory) -> transition -> transition
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  val theory: (theory -> theory) -> transition -> transition
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  val begin_local_theory: bool -> (theory -> local_theory) -> transition -> transition
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  val end_local_theory: transition -> transition
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  val open_target: (generic_theory -> local_theory) -> transition -> transition
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  val close_target: transition -> transition
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  val local_theory': (xstring * Position.T) option -> (bool -> local_theory -> local_theory) ->
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    transition -> transition
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  val local_theory: (xstring * Position.T) option -> (local_theory -> local_theory) ->
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    transition -> transition
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  val present_local_theory: (xstring * Position.T) option -> (state -> unit) ->
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    transition -> transition
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  val local_theory_to_proof': (xstring * Position.T) option ->
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    (bool -> local_theory -> Proof.state) -> transition -> transition
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  val local_theory_to_proof: (xstring * Position.T) option ->
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    (local_theory -> Proof.state) -> transition -> transition
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  val theory_to_proof: (theory -> Proof.state) -> transition -> transition
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  val end_proof: (bool -> Proof.state -> Proof.context) -> transition -> transition
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  val forget_proof: transition -> transition
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  val present_proof: (state -> unit) -> transition -> transition
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  val proofs': (bool -> Proof.state -> Proof.state Seq.result Seq.seq) -> transition -> transition
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  val proof': (bool -> Proof.state -> Proof.state) -> transition -> transition
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  val proofs: (Proof.state -> Proof.state Seq.result Seq.seq) -> transition -> transition
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  val proof: (Proof.state -> Proof.state) -> transition -> transition
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  val actual_proof: (Proof_Node.T -> Proof_Node.T) -> transition -> transition
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  val skip_proof: (int -> int) -> transition -> transition
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  val skip_proof_to_theory: (int -> bool) -> transition -> transition
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  val exec_id: Document_ID.exec -> transition -> transition
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  val unknown_theory: transition -> transition
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  val unknown_proof: transition -> transition
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  val unknown_context: transition -> transition
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  val setmp_thread_position: transition -> ('a -> 'b) -> 'a -> 'b
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  val status: transition -> Markup.T -> unit
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  val add_hook: (transition -> state -> state -> unit) -> unit
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  val get_timing: transition -> Time.time option
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  val put_timing: Time.time option -> transition -> transition
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  val transition: bool -> transition -> state -> (state * (exn * string) option) option
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  val command_errors: bool -> transition -> state -> Runtime.error list * state option
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  val command_exception: bool -> transition -> state -> state
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  type result
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  val join_results: result -> (transition * state) list
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  val element_result: transition Thy_Syntax.element -> state -> result * state
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end;
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structure Toplevel: TOPLEVEL =
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struct
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(** toplevel state **)
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exception UNDEF = Runtime.UNDEF;
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(* local theory wrappers *)
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val loc_init = Named_Target.context_cmd;
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val loc_exit = Local_Theory.assert_bottom true #> Local_Theory.exit_global;
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fun loc_begin loc (Context.Theory thy) =
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      (Context.Theory o loc_exit, loc_init (the_default ("-", Position.none) loc) thy)
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  | loc_begin NONE (Context.Proof lthy) =
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      (Context.Proof o Local_Theory.restore, lthy)
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  | loc_begin (SOME loc) (Context.Proof lthy) =
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      (Context.Proof o Named_Target.reinit lthy, loc_init loc (loc_exit (Local_Theory.assert_nonbrittle lthy)));
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(* datatype node *)
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datatype node =
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  Theory of generic_theory * Proof.context option
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    (*theory with presentation context*) |
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  Proof of Proof_Node.T * ((Proof.context -> generic_theory) * generic_theory)
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    (*proof node, finish, original theory*) |
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  Skipped_Proof of int * (generic_theory * generic_theory);
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    (*proof depth, resulting theory, original theory*)
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val theory_node = fn Theory (gthy, _) => SOME gthy | _ => NONE;
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val proof_node = fn Proof (prf, _) => SOME prf | _ => NONE;
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val skipped_proof_node = fn Skipped_Proof _ => true | _ => false;
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fun cases_node f _ (Theory (gthy, _)) = f gthy
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  | cases_node _ g (Proof (prf, _)) = g (Proof_Node.current prf)
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  | cases_node f _ (Skipped_Proof (_, (gthy, _))) = f gthy;
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val context_node = cases_node Context.proof_of Proof.context_of;
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(* datatype state *)
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datatype state = State of node option * node option;  (*current, previous*)
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val toplevel = State (NONE, NONE);
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fun is_toplevel (State (NONE, _)) = true
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  | is_toplevel _ = false;
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fun level (State (NONE, _)) = 0
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  | level (State (SOME (Theory _), _)) = 0
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  | level (State (SOME (Proof (prf, _)), _)) = Proof.level (Proof_Node.current prf)
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  | level (State (SOME (Skipped_Proof (d, _)), _)) = d + 1;   (*different notion of proof depth!*)
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fun str_of_state (State (NONE, SOME (Theory (Context.Theory thy, _)))) =
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      "at top level, result theory " ^ quote (Context.theory_name thy)
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  | str_of_state (State (NONE, _)) = "at top level"
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  | str_of_state (State (SOME (Theory (Context.Theory _, _)), _)) = "in theory mode"
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  | str_of_state (State (SOME (Theory (Context.Proof _, _)), _)) = "in local theory mode"
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  | str_of_state (State (SOME (Proof _), _)) = "in proof mode"
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  | str_of_state (State (SOME (Skipped_Proof _), _)) = "in skipped proof mode";
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(* current node *)
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fun node_of (State (NONE, _)) = raise UNDEF
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  | node_of (State (SOME node, _)) = node;
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fun is_theory state = not (is_toplevel state) andalso is_some (theory_node (node_of state));
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fun is_proof state = not (is_toplevel state) andalso is_some (proof_node (node_of state));
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fun is_skipped_proof state = not (is_toplevel state) andalso skipped_proof_node (node_of state);
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fun node_case f g state = cases_node f g (node_of state);
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fun presentation_context_of state =
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  (case try node_of state of
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    SOME (Theory (_, SOME ctxt)) => ctxt
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  | SOME node => context_node node
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  | NONE => raise UNDEF);
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fun previous_context_of (State (_, NONE)) = NONE
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  | previous_context_of (State (_, SOME prev)) = SOME (context_node prev);
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val context_of = node_case Context.proof_of Proof.context_of;
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val generic_theory_of = node_case I (Context.Proof o Proof.context_of);
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val theory_of = node_case Context.theory_of Proof.theory_of;
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val proof_of = node_case (fn _ => raise UNDEF) I;
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fun proof_position_of state =
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  (case node_of state of
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    Proof (prf, _) => Proof_Node.position prf
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  | _ => raise UNDEF);
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fun end_theory _ (State (NONE, SOME (Theory (Context.Theory thy, _)))) = thy
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  | end_theory pos (State (NONE, _)) = error ("Bad theory" ^ Position.here pos)
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  | end_theory pos (State (SOME _, _)) = error ("Unfinished theory" ^ Position.here pos);
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(* print state *)
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val pretty_context = Local_Theory.pretty o Context.cases (Named_Target.theory_init) I;
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fun print_state_context state =
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  (case try node_of state of
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    NONE => []
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  | SOME (Theory (gthy, _)) => pretty_context gthy
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  | SOME (Proof (_, (_, gthy))) => pretty_context gthy
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  | SOME (Skipped_Proof (_, (gthy, _))) => pretty_context gthy)
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  |> Pretty.chunks |> Pretty.writeln;
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fun print_state prf_only state =
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  (case try node_of state of
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    NONE => []
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  | SOME (Theory (gthy, _)) => if prf_only then [] else pretty_context gthy
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  | SOME (Proof (prf, _)) =>
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      Proof.pretty_state (Proof_Node.position prf) (Proof_Node.current prf)
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  | SOME (Skipped_Proof (d, _)) => [Pretty.str ("skipped proof: depth " ^ string_of_int d)])
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  |> Pretty.markup_chunks Markup.state |> Pretty.writeln;
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fun pretty_abstract state = Pretty.str ("<Isar " ^ str_of_state state ^ ">");
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(** toplevel transitions **)
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val quiet = Unsynchronized.ref false;
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val debug = Runtime.debug;
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val interact = Unsynchronized.ref false;
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val timing = Unsynchronized.ref false;
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val profiling = Unsynchronized.ref 0;
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fun program body =
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 (body
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  |> Runtime.controlled_execution
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  |> Runtime.toplevel_error (Output.error_msg o ML_Compiler.exn_message)) ();
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fun thread interrupts body =
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  Thread.fork
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    (((fn () => body () handle exn => if Exn.is_interrupt exn then () else reraise exn)
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        |> Runtime.debugging
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        |> Runtime.toplevel_error
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          (fn exn =>
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            Output.urgent_message ("## INTERNAL ERROR ##\n" ^ ML_Compiler.exn_message exn))),
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      Simple_Thread.attributes interrupts);
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(* node transactions -- maintaining stable checkpoints *)
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exception FAILURE of state * exn;
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local
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fun reset_presentation (Theory (gthy, _)) = Theory (gthy, NONE)
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  | reset_presentation node = node;
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fun map_theory f (Theory (gthy, ctxt)) =
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      Theory (Context.mapping f (Local_Theory.raw_theory f) gthy, ctxt)
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  | map_theory _ node = node;
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in
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fun apply_transaction f g node =
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  let
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    val cont_node = reset_presentation node;
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    fun state_error e nd = (State (SOME nd, SOME node), e);
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    val (result, err) =
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      cont_node
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      |> Runtime.controlled_execution f
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      |> state_error NONE
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      handle exn => state_error (SOME exn) cont_node;
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  in
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    (case err of
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      NONE => tap g result
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    | SOME exn => raise FAILURE (result, exn))
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  end;
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val exit_transaction =
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  apply_transaction
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    (fn Theory (Context.Theory thy, _) => Theory (Context.Theory (Theory.end_theory thy), NONE)
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      | node => node) (K ())
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  #> (fn State (node', _) => State (NONE, node'));
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end;
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(* primitive transitions *)
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datatype trans =
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  Init of unit -> theory |               (*init theory*)
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  Exit |                                 (*formal exit of theory*)
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  Keep of bool -> state -> unit |        (*peek at state*)
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  Transaction of (bool -> node -> node) * (state -> unit);  (*node transaction and presentation*)
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local
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fun apply_tr _ (Init f) (State (NONE, _)) =
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      State (SOME (Theory (Context.Theory (Runtime.controlled_execution f ()), NONE)), NONE)
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  | apply_tr _ Exit (State (SOME (state as Theory (Context.Theory _, _)), _)) =
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      exit_transaction state
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  | apply_tr int (Keep f) state =
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      Runtime.controlled_execution (fn x => tap (f int) x) state
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  | apply_tr int (Transaction (f, g)) (State (SOME state, _)) =
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      apply_transaction (fn x => f int x) g state
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  | apply_tr _ _ _ = raise UNDEF;
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fun apply_union _ [] state = raise FAILURE (state, UNDEF)
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  | apply_union int (tr :: trs) state =
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      apply_union int trs state
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        handle Runtime.UNDEF => apply_tr int tr state
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          | FAILURE (alt_state, UNDEF) => apply_tr int tr alt_state
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          | exn as FAILURE _ => raise exn
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          | exn => raise FAILURE (state, exn);
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in
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fun apply_trans int trs state = (apply_union int trs state, NONE)
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  handle FAILURE (alt_state, exn) => (alt_state, SOME exn) | exn => (state, SOME exn);
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end;
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(* datatype transition *)
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datatype transition = Transition of
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 {name: string,              (*command name*)
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   329
  pos: Position.T,           (*source position*)
wenzelm@26621
   330
  int_only: bool,            (*interactive-only*)
wenzelm@26621
   331
  print: bool,               (*print result state*)
wenzelm@51423
   332
  timing: Time.time option,  (*prescient timing information*)
wenzelm@26621
   333
  trans: trans list};        (*primitive transitions (union)*)
wenzelm@5828
   334
wenzelm@51658
   335
fun make_transition (name, pos, int_only, print, timing, trans) =
wenzelm@51217
   336
  Transition {name = name, pos = pos, int_only = int_only, print = print,
wenzelm@51658
   337
    timing = timing, trans = trans};
wenzelm@5828
   338
wenzelm@51658
   339
fun map_transition f (Transition {name, pos, int_only, print, timing, trans}) =
wenzelm@51658
   340
  make_transition (f (name, pos, int_only, print, timing, trans));
wenzelm@5828
   341
wenzelm@51658
   342
val empty = make_transition ("", Position.none, false, false, NONE, []);
wenzelm@5828
   343
wenzelm@5828
   344
wenzelm@5828
   345
(* diagnostics *)
wenzelm@5828
   346
wenzelm@38888
   347
fun print_of (Transition {print, ...}) = print;
wenzelm@27427
   348
fun name_of (Transition {name, ...}) = name;
wenzelm@28105
   349
fun pos_of (Transition {pos, ...}) = pos;
wenzelm@5828
   350
wenzelm@48993
   351
fun command_msg msg tr = msg ^ "command " ^ quote (name_of tr) ^ Position.here (pos_of tr);
wenzelm@38875
   352
fun at_command tr = command_msg "At " tr;
wenzelm@5828
   353
wenzelm@5828
   354
fun type_error tr state =
wenzelm@18685
   355
  ERROR (command_msg "Illegal application of " tr ^ " " ^ str_of_state state);
wenzelm@5828
   356
wenzelm@5828
   357
wenzelm@5828
   358
(* modify transitions *)
wenzelm@5828
   359
wenzelm@51658
   360
fun name name = map_transition (fn (_, pos, int_only, print, timing, trans) =>
wenzelm@51658
   361
  (name, pos, int_only, print, timing, trans));
wenzelm@9010
   362
wenzelm@51658
   363
fun position pos = map_transition (fn (name, _, int_only, print, timing, trans) =>
wenzelm@51658
   364
  (name, pos, int_only, print, timing, trans));
wenzelm@5828
   365
wenzelm@51658
   366
fun interactive int_only = map_transition (fn (name, pos, _, print, timing, trans) =>
wenzelm@51658
   367
  (name, pos, int_only, print, timing, trans));
wenzelm@14923
   368
wenzelm@51658
   369
fun add_trans tr = map_transition (fn (name, pos, int_only, print, timing, trans) =>
wenzelm@51658
   370
  (name, pos, int_only, print, timing, tr :: trans));
wenzelm@16607
   371
wenzelm@51658
   372
val reset_trans = map_transition (fn (name, pos, int_only, print, timing, _) =>
wenzelm@51658
   373
  (name, pos, int_only, print, timing, []));
wenzelm@28433
   374
wenzelm@51658
   375
fun set_print print = map_transition (fn (name, pos, int_only, _, timing, trans) =>
wenzelm@51658
   376
  (name, pos, int_only, print, timing, trans));
wenzelm@28453
   377
wenzelm@28453
   378
val print = set_print true;
wenzelm@5828
   379
wenzelm@5828
   380
wenzelm@21007
   381
(* basic transitions *)
wenzelm@5828
   382
wenzelm@44187
   383
fun init_theory f = add_trans (Init f);
wenzelm@37977
   384
wenzelm@44187
   385
fun is_init (Transition {trans = [Init _], ...}) = true
wenzelm@44187
   386
  | is_init _ = false;
wenzelm@44187
   387
wenzelm@44187
   388
fun modify_init f tr = if is_init tr then init_theory f (reset_trans tr) else tr;
wenzelm@37977
   389
wenzelm@6689
   390
val exit = add_trans Exit;
wenzelm@7612
   391
val keep' = add_trans o Keep;
wenzelm@30366
   392
wenzelm@30366
   393
fun present_transaction f g = add_trans (Transaction (f, g));
wenzelm@30366
   394
fun transaction f = present_transaction f (K ());
wenzelm@5828
   395
wenzelm@7612
   396
fun keep f = add_trans (Keep (fn _ => f));
wenzelm@5828
   397
fun imperative f = keep (fn _ => f ());
wenzelm@5828
   398
wenzelm@27840
   399
fun ignored pos = empty |> name "<ignored>" |> position pos |> imperative I;
wenzelm@51268
   400
fun is_ignored tr = name_of tr = "<ignored>";
wenzelm@48772
   401
wenzelm@48772
   402
val malformed_name = "<malformed>";
wenzelm@27840
   403
fun malformed pos msg =
wenzelm@48772
   404
  empty |> name malformed_name |> position pos |> imperative (fn () => error msg);
wenzelm@48772
   405
fun is_malformed tr = name_of tr = malformed_name;
wenzelm@27840
   406
wenzelm@21007
   407
val unknown_theory = imperative (fn () => warning "Unknown theory context");
wenzelm@21007
   408
val unknown_proof = imperative (fn () => warning "Unknown proof context");
wenzelm@21007
   409
val unknown_context = imperative (fn () => warning "Unknown context");
wenzelm@15668
   410
wenzelm@21007
   411
wenzelm@49012
   412
(* theory transitions *)
wenzelm@44304
   413
wenzelm@27601
   414
fun generic_theory f = transaction (fn _ =>
wenzelm@26491
   415
  (fn Theory (gthy, _) => Theory (f gthy, NONE)
wenzelm@26491
   416
    | _ => raise UNDEF));
wenzelm@26491
   417
wenzelm@27601
   418
fun theory' f = transaction (fn int =>
wenzelm@33725
   419
  (fn Theory (Context.Theory thy, _) =>
wenzelm@33725
   420
      let val thy' = thy
wenzelm@49012
   421
        |> Sign.new_group
wenzelm@33725
   422
        |> f int
wenzelm@33725
   423
        |> Sign.reset_group;
wenzelm@33725
   424
      in Theory (Context.Theory thy', NONE) end
wenzelm@20963
   425
    | _ => raise UNDEF));
wenzelm@20963
   426
wenzelm@20963
   427
fun theory f = theory' (K f);
wenzelm@20963
   428
wenzelm@27601
   429
fun begin_local_theory begin f = transaction (fn _ =>
wenzelm@20963
   430
  (fn Theory (Context.Theory thy, _) =>
wenzelm@20963
   431
        let
wenzelm@20985
   432
          val lthy = f thy;
wenzelm@21294
   433
          val gthy = if begin then Context.Proof lthy else Context.Theory (loc_exit lthy);
wenzelm@21294
   434
        in Theory (gthy, SOME lthy) end
wenzelm@20963
   435
    | _ => raise UNDEF));
wenzelm@17076
   436
wenzelm@27601
   437
val end_local_theory = transaction (fn _ =>
wenzelm@21294
   438
  (fn Theory (Context.Proof lthy, _) => Theory (Context.Theory (loc_exit lthy), SOME lthy)
wenzelm@21007
   439
    | _ => raise UNDEF));
wenzelm@21007
   440
wenzelm@47069
   441
fun open_target f = transaction (fn _ =>
wenzelm@47069
   442
  (fn Theory (gthy, _) =>
wenzelm@47069
   443
        let val lthy = f gthy
wenzelm@47069
   444
        in Theory (Context.Proof lthy, SOME lthy) end
wenzelm@47069
   445
    | _ => raise UNDEF));
wenzelm@47069
   446
wenzelm@47069
   447
val close_target = transaction (fn _ =>
wenzelm@47069
   448
  (fn Theory (Context.Proof lthy, _) =>
wenzelm@47069
   449
        (case try Local_Theory.close_target lthy of
wenzelm@50739
   450
          SOME ctxt' =>
wenzelm@50739
   451
            let
wenzelm@50739
   452
              val gthy' =
wenzelm@50739
   453
                if can Local_Theory.assert ctxt'
wenzelm@50739
   454
                then Context.Proof ctxt'
wenzelm@50739
   455
                else Context.Theory (Proof_Context.theory_of ctxt');
wenzelm@50739
   456
            in Theory (gthy', SOME lthy) end
wenzelm@47069
   457
        | NONE => raise UNDEF)
wenzelm@47069
   458
    | _ => raise UNDEF));
wenzelm@47069
   459
wenzelm@47069
   460
wenzelm@21007
   461
local
wenzelm@21007
   462
wenzelm@30366
   463
fun local_theory_presentation loc f = present_transaction (fn int =>
wenzelm@21294
   464
  (fn Theory (gthy, _) =>
wenzelm@21294
   465
        let
wenzelm@49062
   466
          val (finish, lthy) = loc_begin loc gthy;
wenzelm@47274
   467
          val lthy' = lthy
wenzelm@49012
   468
            |> Local_Theory.new_group
wenzelm@33725
   469
            |> f int
wenzelm@33725
   470
            |> Local_Theory.reset_group;
wenzelm@21294
   471
        in Theory (finish lthy', SOME lthy') end
wenzelm@30366
   472
    | _ => raise UNDEF));
wenzelm@15668
   473
wenzelm@21007
   474
in
wenzelm@21007
   475
wenzelm@30366
   476
fun local_theory' loc f = local_theory_presentation loc f (K ());
wenzelm@29380
   477
fun local_theory loc f = local_theory' loc (K f);
wenzelm@30366
   478
fun present_local_theory loc = local_theory_presentation loc (K I);
wenzelm@18955
   479
wenzelm@21007
   480
end;
wenzelm@21007
   481
wenzelm@21007
   482
wenzelm@21007
   483
(* proof transitions *)
wenzelm@21007
   484
wenzelm@27601
   485
fun end_proof f = transaction (fn int =>
wenzelm@24795
   486
  (fn Proof (prf, (finish, _)) =>
wenzelm@33390
   487
        let val state = Proof_Node.current prf in
wenzelm@21007
   488
          if can (Proof.assert_bottom true) state then
wenzelm@21007
   489
            let
wenzelm@21007
   490
              val ctxt' = f int state;
wenzelm@21007
   491
              val gthy' = finish ctxt';
wenzelm@21007
   492
            in Theory (gthy', SOME ctxt') end
wenzelm@21007
   493
          else raise UNDEF
wenzelm@21007
   494
        end
wenzelm@51555
   495
    | Skipped_Proof (0, (gthy, _)) => Theory (gthy, NONE)
wenzelm@21007
   496
    | _ => raise UNDEF));
wenzelm@21007
   497
wenzelm@21294
   498
local
wenzelm@21294
   499
wenzelm@47274
   500
fun begin_proof init = transaction (fn int =>
wenzelm@21294
   501
  (fn Theory (gthy, _) =>
wenzelm@21294
   502
    let
wenzelm@47274
   503
      val (finish, prf) = init int gthy;
wenzelm@52499
   504
      val skip = Goal.skip_proofs_enabled ();
wenzelm@40960
   505
      val (is_goal, no_skip) =
wenzelm@40960
   506
        (true, Proof.schematic_goal prf) handle ERROR _ => (false, true);
wenzelm@47274
   507
      val _ =
wenzelm@47274
   508
        if is_goal andalso skip andalso no_skip then
wenzelm@47274
   509
          warning "Cannot skip proof of schematic goal statement"
wenzelm@47274
   510
        else ();
wenzelm@21294
   511
    in
wenzelm@40960
   512
      if skip andalso not no_skip then
wenzelm@51555
   513
        Skipped_Proof (0, (finish (Proof.global_skip_proof true prf), gthy))
wenzelm@47274
   514
      else Proof (Proof_Node.init prf, (finish, gthy))
wenzelm@21294
   515
    end
wenzelm@21294
   516
  | _ => raise UNDEF));
wenzelm@21294
   517
wenzelm@21294
   518
in
wenzelm@21294
   519
wenzelm@24780
   520
fun local_theory_to_proof' loc f = begin_proof
wenzelm@47274
   521
  (fn int => fn gthy =>
wenzelm@49062
   522
    let val (finish, lthy) = loc_begin loc gthy
wenzelm@49012
   523
    in (finish o Local_Theory.reset_group, f int (Local_Theory.new_group lthy)) end);
wenzelm@24780
   524
berghofe@24453
   525
fun local_theory_to_proof loc f = local_theory_to_proof' loc (K f);
wenzelm@21294
   526
wenzelm@21294
   527
fun theory_to_proof f = begin_proof
wenzelm@47274
   528
  (fn _ => fn gthy =>
wenzelm@52788
   529
    (Context.Theory o Sign.reset_group o Proof_Context.theory_of,
wenzelm@49062
   530
      (case gthy of
wenzelm@52788
   531
        Context.Theory thy => f (Sign.new_group thy)
wenzelm@49012
   532
      | _ => raise UNDEF)));
wenzelm@21294
   533
wenzelm@21294
   534
end;
wenzelm@21294
   535
wenzelm@27601
   536
val forget_proof = transaction (fn _ =>
wenzelm@21007
   537
  (fn Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@51555
   538
    | Skipped_Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@21007
   539
    | _ => raise UNDEF));
wenzelm@21007
   540
wenzelm@30366
   541
val present_proof = present_transaction (fn _ =>
wenzelm@49062
   542
  (fn Proof (prf, x) => Proof (Proof_Node.apply I prf, x)
wenzelm@51555
   543
    | skip as Skipped_Proof _ => skip
wenzelm@30366
   544
    | _ => raise UNDEF));
wenzelm@21177
   545
wenzelm@27601
   546
fun proofs' f = transaction (fn int =>
wenzelm@49062
   547
  (fn Proof (prf, x) => Proof (Proof_Node.applys (f int) prf, x)
wenzelm@51555
   548
    | skip as Skipped_Proof _ => skip
wenzelm@16815
   549
    | _ => raise UNDEF));
wenzelm@15668
   550
wenzelm@49863
   551
fun proof' f = proofs' ((Seq.single o Seq.Result) oo f);
wenzelm@17904
   552
val proofs = proofs' o K;
wenzelm@6689
   553
val proof = proof' o K;
wenzelm@16815
   554
wenzelm@27601
   555
fun actual_proof f = transaction (fn _ =>
wenzelm@21007
   556
  (fn Proof (prf, x) => Proof (f prf, x)
wenzelm@20963
   557
    | _ => raise UNDEF));
wenzelm@16815
   558
wenzelm@27601
   559
fun skip_proof f = transaction (fn _ =>
wenzelm@51555
   560
  (fn Skipped_Proof (h, x) => Skipped_Proof (f h, x)
wenzelm@18563
   561
    | _ => raise UNDEF));
wenzelm@18563
   562
wenzelm@27601
   563
fun skip_proof_to_theory pred = transaction (fn _ =>
wenzelm@51555
   564
  (fn Skipped_Proof (d, (gthy, _)) => if pred d then Theory (gthy, NONE) else raise UNDEF
wenzelm@33725
   565
    | _ => raise UNDEF));
wenzelm@5828
   566
wenzelm@5828
   567
wenzelm@5828
   568
wenzelm@5828
   569
(** toplevel transactions **)
wenzelm@5828
   570
wenzelm@52527
   571
(* runtime position *)
wenzelm@27427
   572
wenzelm@52536
   573
fun exec_id id (tr as Transition {pos, ...}) =
wenzelm@52536
   574
  position (Position.put_id (Document_ID.print id) pos) tr;
wenzelm@25799
   575
wenzelm@25960
   576
fun setmp_thread_position (Transition {pos, ...}) f x =
wenzelm@25819
   577
  Position.setmp_thread_data pos f x;
wenzelm@25799
   578
wenzelm@27606
   579
fun status tr m =
wenzelm@43665
   580
  setmp_thread_position tr (fn () => Output.status (Markup.markup_only m)) ();
wenzelm@27606
   581
wenzelm@25799
   582
wenzelm@28095
   583
(* post-transition hooks *)
wenzelm@28095
   584
wenzelm@37905
   585
local
wenzelm@37905
   586
  val hooks = Unsynchronized.ref ([]: (transition -> state -> state -> unit) list);
wenzelm@37905
   587
in
wenzelm@28095
   588
wenzelm@32738
   589
fun add_hook f = CRITICAL (fn () => Unsynchronized.change hooks (cons f));
wenzelm@33223
   590
fun get_hooks () = ! hooks;
wenzelm@28095
   591
wenzelm@28095
   592
end;
wenzelm@28095
   593
wenzelm@28095
   594
wenzelm@5828
   595
(* apply transitions *)
wenzelm@5828
   596
wenzelm@51217
   597
fun get_timing (Transition {timing, ...}) = timing;
wenzelm@51658
   598
fun put_timing timing = map_transition (fn (name, pos, int_only, print, _, trans) =>
wenzelm@51658
   599
  (name, pos, int_only, print, timing, trans));
wenzelm@51217
   600
wenzelm@6664
   601
local
wenzelm@6664
   602
wenzelm@51658
   603
fun app int (tr as Transition {trans, print, ...}) =
wenzelm@25819
   604
  setmp_thread_position tr (fn state =>
wenzelm@25799
   605
    let
wenzelm@51595
   606
      val timing_start = Timing.start ();
wenzelm@25799
   607
wenzelm@51595
   608
      val (result, opt_err) =
wenzelm@51658
   609
         state |> (apply_trans int trans |> ! profiling > 0 ? profile (! profiling));
wenzelm@26621
   610
      val _ = if int andalso not (! quiet) andalso print then print_state false result else ();
wenzelm@51216
   611
wenzelm@51595
   612
      val timing_result = Timing.result timing_start;
wenzelm@51662
   613
      val timing_props =
wenzelm@51662
   614
        Markup.command_timing :: (Markup.nameN, name_of tr) :: Position.properties_of (pos_of tr);
wenzelm@51662
   615
      val _ = Timing.protocol_message timing_props timing_result;
wenzelm@51595
   616
    in
wenzelm@51595
   617
      (result, Option.map (fn UNDEF => type_error tr state | exn => exn) opt_err)
wenzelm@51595
   618
    end);
wenzelm@6664
   619
wenzelm@6664
   620
in
wenzelm@5828
   621
wenzelm@26602
   622
fun transition int tr st =
wenzelm@28095
   623
  let
wenzelm@28095
   624
    val hooks = get_hooks ();
wenzelm@28103
   625
    fun apply_hooks st' = hooks |> List.app (fn f => (try (fn () => f tr st st') (); ()));
wenzelm@28095
   626
wenzelm@28095
   627
    val ctxt = try context_of st;
wenzelm@28095
   628
    val res =
wenzelm@28095
   629
      (case app int tr st of
wenzelm@38888
   630
        (_, SOME Runtime.TERMINATE) => NONE
wenzelm@38888
   631
      | (st', SOME (Runtime.EXCURSION_FAIL exn_info)) => SOME (st', SOME exn_info)
wenzelm@31476
   632
      | (st', SOME exn) => SOME (st', SOME (Runtime.exn_context ctxt exn, at_command tr))
wenzelm@28103
   633
      | (st', NONE) => SOME (st', NONE));
wenzelm@28103
   634
    val _ = (case res of SOME (st', NONE) => apply_hooks st' | _ => ());
wenzelm@28095
   635
  in res end;
wenzelm@6664
   636
wenzelm@6664
   637
end;
wenzelm@5828
   638
wenzelm@5828
   639
wenzelm@51284
   640
(* managed commands *)
wenzelm@5828
   641
wenzelm@51323
   642
fun command_errors int tr st =
wenzelm@51323
   643
  (case transition int tr st of
wenzelm@51323
   644
    SOME (st', NONE) => ([], SOME st')
wenzelm@51323
   645
  | SOME (_, SOME (exn, _)) => (ML_Compiler.exn_messages_ids exn, NONE)
wenzelm@51323
   646
  | NONE => (ML_Compiler.exn_messages_ids Runtime.TERMINATE, NONE));
wenzelm@51323
   647
wenzelm@51284
   648
fun command_exception int tr st =
wenzelm@51284
   649
  (case transition int tr st of
wenzelm@28425
   650
    SOME (st', NONE) => st'
wenzelm@39285
   651
  | SOME (_, SOME (exn, info)) =>
wenzelm@39285
   652
      if Exn.is_interrupt exn then reraise exn else raise Runtime.EXCURSION_FAIL (exn, info)
wenzelm@38888
   653
  | NONE => raise Runtime.EXCURSION_FAIL (Runtime.TERMINATE, at_command tr));
wenzelm@27576
   654
wenzelm@51323
   655
fun command tr = command_exception (! interact) tr;
wenzelm@51284
   656
wenzelm@28433
   657
wenzelm@46959
   658
(* scheduled proof result *)
wenzelm@28433
   659
wenzelm@51332
   660
datatype result =
wenzelm@51332
   661
  Result of transition * state |
wenzelm@51332
   662
  Result_List of result list |
wenzelm@51332
   663
  Result_Future of result future;
wenzelm@51332
   664
wenzelm@51332
   665
fun join_results (Result x) = [x]
wenzelm@51332
   666
  | join_results (Result_List xs) = maps join_results xs
wenzelm@51332
   667
  | join_results (Result_Future x) = join_results (Future.join x);
wenzelm@51332
   668
wenzelm@51323
   669
local
wenzelm@51323
   670
wenzelm@47417
   671
structure Result = Proof_Data
wenzelm@28974
   672
(
wenzelm@51332
   673
  type T = result;
wenzelm@51332
   674
  val empty: T = Result_List [];
wenzelm@47417
   675
  fun init _ = empty;
wenzelm@28974
   676
);
wenzelm@28974
   677
wenzelm@51332
   678
val get_result = Result.get o Proof.context_of;
wenzelm@51332
   679
val put_result = Proof.map_context o Result.put;
wenzelm@51324
   680
wenzelm@51423
   681
fun timing_estimate include_head elem =
wenzelm@51423
   682
  let
wenzelm@51423
   683
    val trs = Thy_Syntax.flat_element elem |> not include_head ? tl;
wenzelm@51423
   684
    val timings = map get_timing trs;
wenzelm@51423
   685
  in
wenzelm@51423
   686
    if forall is_some timings then
wenzelm@51423
   687
      SOME (fold (curry Time.+ o the) timings Time.zeroTime)
wenzelm@51423
   688
    else NONE
wenzelm@51423
   689
  end;
wenzelm@51423
   690
wenzelm@51423
   691
fun priority NONE = ~1
wenzelm@51423
   692
  | priority (SOME estimate) =
wenzelm@51423
   693
      Int.min (Real.floor (Real.max (Math.log10 (Time.toReal estimate), ~3.0)) - 3, ~1);
wenzelm@51423
   694
wenzelm@51423
   695
fun proof_future_enabled estimate st =
wenzelm@51324
   696
  (case try proof_of st of
wenzelm@51324
   697
    NONE => false
wenzelm@51324
   698
  | SOME state =>
wenzelm@51324
   699
      not (Proof.is_relevant state) andalso
wenzelm@51324
   700
       (if can (Proof.assert_bottom true) state
wenzelm@53189
   701
        then Goal.future_enabled 1
wenzelm@51423
   702
        else
wenzelm@51423
   703
          (case estimate of
wenzelm@53189
   704
            NONE => Goal.future_enabled 2
wenzelm@51423
   705
          | SOME t => Goal.future_enabled_timing t)));
wenzelm@51278
   706
wenzelm@51323
   707
fun atom_result tr st =
wenzelm@51323
   708
  let
wenzelm@51323
   709
    val st' =
wenzelm@53189
   710
      if Goal.future_enabled 1 andalso Keyword.is_diag (name_of tr) then
wenzelm@53192
   711
        (Execution.fork
wenzelm@51605
   712
          {name = "Toplevel.diag", pos = pos_of tr,
wenzelm@51605
   713
            pri = priority (timing_estimate true (Thy_Syntax.atom tr))}
wenzelm@51605
   714
          (fn () => command tr st); st)
wenzelm@51323
   715
      else command tr st;
wenzelm@51332
   716
  in (Result (tr, st'), st') end;
wenzelm@51323
   717
wenzelm@51323
   718
in
wenzelm@51323
   719
wenzelm@51332
   720
fun element_result (Thy_Syntax.Element (tr, NONE)) st = atom_result tr st
wenzelm@51423
   721
  | element_result (elem as Thy_Syntax.Element (head_tr, SOME element_rest)) st =
wenzelm@48633
   722
      let
wenzelm@51324
   723
        val (head_result, st') = atom_result head_tr st;
wenzelm@51332
   724
        val (body_elems, end_tr) = element_rest;
wenzelm@51423
   725
        val estimate = timing_estimate false elem;
wenzelm@51324
   726
      in
wenzelm@51423
   727
        if not (proof_future_enabled estimate st')
wenzelm@51324
   728
        then
wenzelm@51332
   729
          let
wenzelm@51332
   730
            val proof_trs = maps Thy_Syntax.flat_element body_elems @ [end_tr];
wenzelm@51332
   731
            val (proof_results, st'') = fold_map atom_result proof_trs st';
wenzelm@51332
   732
          in (Result_List (head_result :: proof_results), st'') end
wenzelm@51324
   733
        else
wenzelm@51324
   734
          let
wenzelm@51324
   735
            val finish = Context.Theory o Proof_Context.theory_of;
wenzelm@28974
   736
wenzelm@51605
   737
            val future_proof =
wenzelm@51605
   738
              Proof.future_proof (fn state =>
wenzelm@53192
   739
                Execution.fork
wenzelm@51605
   740
                  {name = "Toplevel.future_proof", pos = pos_of head_tr, pri = priority estimate}
wenzelm@51605
   741
                  (fn () =>
wenzelm@51605
   742
                    let
wenzelm@51605
   743
                      val State (SOME (Proof (prf, (_, orig_gthy))), prev) = st';
wenzelm@51605
   744
                      val prf' = Proof_Node.apply (K state) prf;
wenzelm@51605
   745
                      val (result, result_state) =
wenzelm@51605
   746
                        State (SOME (Proof (prf', (finish, orig_gthy))), prev)
wenzelm@51605
   747
                        |> fold_map element_result body_elems ||> command end_tr;
wenzelm@51605
   748
                    in (Result_List result, presentation_context_of result_state) end))
wenzelm@51332
   749
              #> (fn (res, state') => state' |> put_result (Result_Future res));
wenzelm@51332
   750
wenzelm@51332
   751
            val forked_proof =
wenzelm@51332
   752
              proof (future_proof #>
wenzelm@51332
   753
                (fn state => state |> Proof.local_done_proof |> put_result (get_result state))) o
wenzelm@51332
   754
              end_proof (fn _ => future_proof #>
wenzelm@51332
   755
                (fn state => state |> Proof.global_done_proof |> Result.put (get_result state)));
wenzelm@28974
   756
wenzelm@51324
   757
            val st'' = st'
wenzelm@51332
   758
              |> command (head_tr |> set_print false |> reset_trans |> forked_proof);
wenzelm@51332
   759
            val end_result = Result (end_tr, st'');
wenzelm@51324
   760
            val result =
wenzelm@51332
   761
              Result_List [head_result, Result.get (presentation_context_of st''), end_result];
wenzelm@51324
   762
          in (result, st'') end
wenzelm@51324
   763
      end;
wenzelm@28433
   764
wenzelm@6664
   765
end;
wenzelm@51323
   766
wenzelm@51323
   767
end;