src/Pure/Isar/toplevel.ML
author wenzelm
Fri Jul 05 22:58:24 2013 +0200 (2013-07-05 ago)
changeset 52536 3a35ce87a55c
parent 52527 dbac84eab3bc
child 52565 b04cbc49bdcf
permissions -rw-r--r--
tuned signature;
tuned comments;
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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, _)) = "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 is_draft_theory (Theory (gthy, _)) = Context.is_draft (Context.theory_of gthy)
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  | is_draft_theory _ = false;
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fun is_stale state = Context.is_stale (theory_of state) handle Runtime.UNDEF => false;
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fun stale_error NONE = SOME (ERROR "Stale theory encountered after successful execution!")
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  | stale_error some = some;
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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 _ = is_draft_theory node andalso error "Illegal draft theory in toplevel state";
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    val cont_node = reset_presentation node;
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    val back_node = map_theory (Theory.checkpoint o Theory.copy) cont_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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      |> map_theory Theory.checkpoint
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      |> state_error NONE
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      handle exn => state_error (SOME exn) cont_node;
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    val (result', err') =
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      if is_stale result then state_error (stale_error err) back_node
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      else (result, err);
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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
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          (Theory.checkpoint (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
wenzelm@6689
   328
          | exn as FAILURE _ => raise exn
wenzelm@6689
   329
          | exn => raise FAILURE (state, exn);
wenzelm@6689
   330
wenzelm@6689
   331
in
wenzelm@6689
   332
wenzelm@32792
   333
fun apply_trans int trs state = (apply_union int trs state, NONE)
skalberg@15531
   334
  handle FAILURE (alt_state, exn) => (alt_state, SOME exn) | exn => (state, SOME exn);
wenzelm@6689
   335
wenzelm@6689
   336
end;
wenzelm@5828
   337
wenzelm@5828
   338
wenzelm@5828
   339
(* datatype transition *)
wenzelm@5828
   340
wenzelm@5828
   341
datatype transition = Transition of
wenzelm@26621
   342
 {name: string,              (*command name*)
wenzelm@26621
   343
  pos: Position.T,           (*source position*)
wenzelm@26621
   344
  int_only: bool,            (*interactive-only*)
wenzelm@26621
   345
  print: bool,               (*print result state*)
wenzelm@51423
   346
  timing: Time.time option,  (*prescient timing information*)
wenzelm@26621
   347
  trans: trans list};        (*primitive transitions (union)*)
wenzelm@5828
   348
wenzelm@51658
   349
fun make_transition (name, pos, int_only, print, timing, trans) =
wenzelm@51217
   350
  Transition {name = name, pos = pos, int_only = int_only, print = print,
wenzelm@51658
   351
    timing = timing, trans = trans};
wenzelm@5828
   352
wenzelm@51658
   353
fun map_transition f (Transition {name, pos, int_only, print, timing, trans}) =
wenzelm@51658
   354
  make_transition (f (name, pos, int_only, print, timing, trans));
wenzelm@5828
   355
wenzelm@51658
   356
val empty = make_transition ("", Position.none, false, false, NONE, []);
wenzelm@5828
   357
wenzelm@5828
   358
wenzelm@5828
   359
(* diagnostics *)
wenzelm@5828
   360
wenzelm@38888
   361
fun print_of (Transition {print, ...}) = print;
wenzelm@27427
   362
fun name_of (Transition {name, ...}) = name;
wenzelm@28105
   363
fun pos_of (Transition {pos, ...}) = pos;
wenzelm@5828
   364
wenzelm@48993
   365
fun command_msg msg tr = msg ^ "command " ^ quote (name_of tr) ^ Position.here (pos_of tr);
wenzelm@38875
   366
fun at_command tr = command_msg "At " tr;
wenzelm@5828
   367
wenzelm@5828
   368
fun type_error tr state =
wenzelm@18685
   369
  ERROR (command_msg "Illegal application of " tr ^ " " ^ str_of_state state);
wenzelm@5828
   370
wenzelm@5828
   371
wenzelm@5828
   372
(* modify transitions *)
wenzelm@5828
   373
wenzelm@51658
   374
fun name name = map_transition (fn (_, pos, int_only, print, timing, trans) =>
wenzelm@51658
   375
  (name, pos, int_only, print, timing, trans));
wenzelm@9010
   376
wenzelm@51658
   377
fun position pos = map_transition (fn (name, _, int_only, print, timing, trans) =>
wenzelm@51658
   378
  (name, pos, int_only, print, timing, trans));
wenzelm@5828
   379
wenzelm@51658
   380
fun interactive int_only = map_transition (fn (name, pos, _, print, timing, trans) =>
wenzelm@51658
   381
  (name, pos, int_only, print, timing, trans));
wenzelm@14923
   382
wenzelm@51658
   383
fun add_trans tr = map_transition (fn (name, pos, int_only, print, timing, trans) =>
wenzelm@51658
   384
  (name, pos, int_only, print, timing, tr :: trans));
wenzelm@16607
   385
wenzelm@51658
   386
val reset_trans = map_transition (fn (name, pos, int_only, print, timing, _) =>
wenzelm@51658
   387
  (name, pos, int_only, print, timing, []));
wenzelm@28433
   388
wenzelm@51658
   389
fun set_print print = map_transition (fn (name, pos, int_only, _, timing, trans) =>
wenzelm@51658
   390
  (name, pos, int_only, print, timing, trans));
wenzelm@28453
   391
wenzelm@28453
   392
val print = set_print true;
wenzelm@5828
   393
wenzelm@5828
   394
wenzelm@21007
   395
(* basic transitions *)
wenzelm@5828
   396
wenzelm@44187
   397
fun init_theory f = add_trans (Init f);
wenzelm@37977
   398
wenzelm@44187
   399
fun is_init (Transition {trans = [Init _], ...}) = true
wenzelm@44187
   400
  | is_init _ = false;
wenzelm@44187
   401
wenzelm@44187
   402
fun modify_init f tr = if is_init tr then init_theory f (reset_trans tr) else tr;
wenzelm@37977
   403
wenzelm@6689
   404
val exit = add_trans Exit;
wenzelm@7612
   405
val keep' = add_trans o Keep;
wenzelm@30366
   406
wenzelm@30366
   407
fun present_transaction f g = add_trans (Transaction (f, g));
wenzelm@30366
   408
fun transaction f = present_transaction f (K ());
wenzelm@5828
   409
wenzelm@7612
   410
fun keep f = add_trans (Keep (fn _ => f));
wenzelm@5828
   411
fun imperative f = keep (fn _ => f ());
wenzelm@5828
   412
wenzelm@27840
   413
fun ignored pos = empty |> name "<ignored>" |> position pos |> imperative I;
wenzelm@51268
   414
fun is_ignored tr = name_of tr = "<ignored>";
wenzelm@48772
   415
wenzelm@48772
   416
val malformed_name = "<malformed>";
wenzelm@27840
   417
fun malformed pos msg =
wenzelm@48772
   418
  empty |> name malformed_name |> position pos |> imperative (fn () => error msg);
wenzelm@48772
   419
fun is_malformed tr = name_of tr = malformed_name;
wenzelm@27840
   420
wenzelm@21007
   421
val unknown_theory = imperative (fn () => warning "Unknown theory context");
wenzelm@21007
   422
val unknown_proof = imperative (fn () => warning "Unknown proof context");
wenzelm@21007
   423
val unknown_context = imperative (fn () => warning "Unknown context");
wenzelm@15668
   424
wenzelm@21007
   425
wenzelm@49012
   426
(* theory transitions *)
wenzelm@44304
   427
wenzelm@27601
   428
fun generic_theory f = transaction (fn _ =>
wenzelm@26491
   429
  (fn Theory (gthy, _) => Theory (f gthy, NONE)
wenzelm@26491
   430
    | _ => raise UNDEF));
wenzelm@26491
   431
wenzelm@27601
   432
fun theory' f = transaction (fn int =>
wenzelm@33725
   433
  (fn Theory (Context.Theory thy, _) =>
wenzelm@33725
   434
      let val thy' = thy
wenzelm@49012
   435
        |> Sign.new_group
wenzelm@49012
   436
        |> Theory.checkpoint
wenzelm@33725
   437
        |> f int
wenzelm@33725
   438
        |> Sign.reset_group;
wenzelm@33725
   439
      in Theory (Context.Theory thy', NONE) end
wenzelm@20963
   440
    | _ => raise UNDEF));
wenzelm@20963
   441
wenzelm@20963
   442
fun theory f = theory' (K f);
wenzelm@20963
   443
wenzelm@27601
   444
fun begin_local_theory begin f = transaction (fn _ =>
wenzelm@20963
   445
  (fn Theory (Context.Theory thy, _) =>
wenzelm@20963
   446
        let
wenzelm@20985
   447
          val lthy = f thy;
wenzelm@21294
   448
          val gthy = if begin then Context.Proof lthy else Context.Theory (loc_exit lthy);
wenzelm@21294
   449
        in Theory (gthy, SOME lthy) end
wenzelm@20963
   450
    | _ => raise UNDEF));
wenzelm@17076
   451
wenzelm@27601
   452
val end_local_theory = transaction (fn _ =>
wenzelm@21294
   453
  (fn Theory (Context.Proof lthy, _) => Theory (Context.Theory (loc_exit lthy), SOME lthy)
wenzelm@21007
   454
    | _ => raise UNDEF));
wenzelm@21007
   455
wenzelm@47069
   456
fun open_target f = transaction (fn _ =>
wenzelm@47069
   457
  (fn Theory (gthy, _) =>
wenzelm@47069
   458
        let val lthy = f gthy
wenzelm@47069
   459
        in Theory (Context.Proof lthy, SOME lthy) end
wenzelm@47069
   460
    | _ => raise UNDEF));
wenzelm@47069
   461
wenzelm@47069
   462
val close_target = transaction (fn _ =>
wenzelm@47069
   463
  (fn Theory (Context.Proof lthy, _) =>
wenzelm@47069
   464
        (case try Local_Theory.close_target lthy of
wenzelm@50739
   465
          SOME ctxt' =>
wenzelm@50739
   466
            let
wenzelm@50739
   467
              val gthy' =
wenzelm@50739
   468
                if can Local_Theory.assert ctxt'
wenzelm@50739
   469
                then Context.Proof ctxt'
wenzelm@50739
   470
                else Context.Theory (Proof_Context.theory_of ctxt');
wenzelm@50739
   471
            in Theory (gthy', SOME lthy) end
wenzelm@47069
   472
        | NONE => raise UNDEF)
wenzelm@47069
   473
    | _ => raise UNDEF));
wenzelm@47069
   474
wenzelm@47069
   475
wenzelm@21007
   476
local
wenzelm@21007
   477
wenzelm@30366
   478
fun local_theory_presentation loc f = present_transaction (fn int =>
wenzelm@21294
   479
  (fn Theory (gthy, _) =>
wenzelm@21294
   480
        let
wenzelm@49062
   481
          val (finish, lthy) = loc_begin loc gthy;
wenzelm@47274
   482
          val lthy' = lthy
wenzelm@49012
   483
            |> Local_Theory.new_group
wenzelm@33725
   484
            |> f int
wenzelm@33725
   485
            |> Local_Theory.reset_group;
wenzelm@21294
   486
        in Theory (finish lthy', SOME lthy') end
wenzelm@30366
   487
    | _ => raise UNDEF));
wenzelm@15668
   488
wenzelm@21007
   489
in
wenzelm@21007
   490
wenzelm@30366
   491
fun local_theory' loc f = local_theory_presentation loc f (K ());
wenzelm@29380
   492
fun local_theory loc f = local_theory' loc (K f);
wenzelm@30366
   493
fun present_local_theory loc = local_theory_presentation loc (K I);
wenzelm@18955
   494
wenzelm@21007
   495
end;
wenzelm@21007
   496
wenzelm@21007
   497
wenzelm@21007
   498
(* proof transitions *)
wenzelm@21007
   499
wenzelm@27601
   500
fun end_proof f = transaction (fn int =>
wenzelm@24795
   501
  (fn Proof (prf, (finish, _)) =>
wenzelm@33390
   502
        let val state = Proof_Node.current prf in
wenzelm@21007
   503
          if can (Proof.assert_bottom true) state then
wenzelm@21007
   504
            let
wenzelm@21007
   505
              val ctxt' = f int state;
wenzelm@21007
   506
              val gthy' = finish ctxt';
wenzelm@21007
   507
            in Theory (gthy', SOME ctxt') end
wenzelm@21007
   508
          else raise UNDEF
wenzelm@21007
   509
        end
wenzelm@51555
   510
    | Skipped_Proof (0, (gthy, _)) => Theory (gthy, NONE)
wenzelm@21007
   511
    | _ => raise UNDEF));
wenzelm@21007
   512
wenzelm@21294
   513
local
wenzelm@21294
   514
wenzelm@47274
   515
fun begin_proof init = transaction (fn int =>
wenzelm@21294
   516
  (fn Theory (gthy, _) =>
wenzelm@21294
   517
    let
wenzelm@47274
   518
      val (finish, prf) = init int gthy;
wenzelm@52499
   519
      val skip = Goal.skip_proofs_enabled ();
wenzelm@40960
   520
      val (is_goal, no_skip) =
wenzelm@40960
   521
        (true, Proof.schematic_goal prf) handle ERROR _ => (false, true);
wenzelm@47274
   522
      val _ =
wenzelm@47274
   523
        if is_goal andalso skip andalso no_skip then
wenzelm@47274
   524
          warning "Cannot skip proof of schematic goal statement"
wenzelm@47274
   525
        else ();
wenzelm@21294
   526
    in
wenzelm@40960
   527
      if skip andalso not no_skip then
wenzelm@51555
   528
        Skipped_Proof (0, (finish (Proof.global_skip_proof true prf), gthy))
wenzelm@47274
   529
      else Proof (Proof_Node.init prf, (finish, gthy))
wenzelm@21294
   530
    end
wenzelm@21294
   531
  | _ => raise UNDEF));
wenzelm@21294
   532
wenzelm@21294
   533
in
wenzelm@21294
   534
wenzelm@24780
   535
fun local_theory_to_proof' loc f = begin_proof
wenzelm@47274
   536
  (fn int => fn gthy =>
wenzelm@49062
   537
    let val (finish, lthy) = loc_begin loc gthy
wenzelm@49012
   538
    in (finish o Local_Theory.reset_group, f int (Local_Theory.new_group lthy)) end);
wenzelm@24780
   539
berghofe@24453
   540
fun local_theory_to_proof loc f = local_theory_to_proof' loc (K f);
wenzelm@21294
   541
wenzelm@21294
   542
fun theory_to_proof f = begin_proof
wenzelm@47274
   543
  (fn _ => fn gthy =>
wenzelm@51560
   544
    (Context.Theory o Theory.checkpoint o Sign.reset_group o Proof_Context.theory_of,
wenzelm@49062
   545
      (case gthy of
wenzelm@49012
   546
        Context.Theory thy => f (Theory.checkpoint (Sign.new_group thy))
wenzelm@49012
   547
      | _ => raise UNDEF)));
wenzelm@21294
   548
wenzelm@21294
   549
end;
wenzelm@21294
   550
wenzelm@27601
   551
val forget_proof = transaction (fn _ =>
wenzelm@21007
   552
  (fn Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@51555
   553
    | Skipped_Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@21007
   554
    | _ => raise UNDEF));
wenzelm@21007
   555
wenzelm@30366
   556
val present_proof = present_transaction (fn _ =>
wenzelm@49062
   557
  (fn Proof (prf, x) => Proof (Proof_Node.apply I prf, x)
wenzelm@51555
   558
    | skip as Skipped_Proof _ => skip
wenzelm@30366
   559
    | _ => raise UNDEF));
wenzelm@21177
   560
wenzelm@27601
   561
fun proofs' f = transaction (fn int =>
wenzelm@49062
   562
  (fn Proof (prf, x) => Proof (Proof_Node.applys (f int) prf, x)
wenzelm@51555
   563
    | skip as Skipped_Proof _ => skip
wenzelm@16815
   564
    | _ => raise UNDEF));
wenzelm@15668
   565
wenzelm@49863
   566
fun proof' f = proofs' ((Seq.single o Seq.Result) oo f);
wenzelm@17904
   567
val proofs = proofs' o K;
wenzelm@6689
   568
val proof = proof' o K;
wenzelm@16815
   569
wenzelm@27601
   570
fun actual_proof f = transaction (fn _ =>
wenzelm@21007
   571
  (fn Proof (prf, x) => Proof (f prf, x)
wenzelm@20963
   572
    | _ => raise UNDEF));
wenzelm@16815
   573
wenzelm@27601
   574
fun skip_proof f = transaction (fn _ =>
wenzelm@51555
   575
  (fn Skipped_Proof (h, x) => Skipped_Proof (f h, x)
wenzelm@18563
   576
    | _ => raise UNDEF));
wenzelm@18563
   577
wenzelm@27601
   578
fun skip_proof_to_theory pred = transaction (fn _ =>
wenzelm@51555
   579
  (fn Skipped_Proof (d, (gthy, _)) => if pred d then Theory (gthy, NONE) else raise UNDEF
wenzelm@33725
   580
    | _ => raise UNDEF));
wenzelm@5828
   581
wenzelm@5828
   582
wenzelm@5828
   583
wenzelm@5828
   584
(** toplevel transactions **)
wenzelm@5828
   585
wenzelm@52527
   586
(* runtime position *)
wenzelm@27427
   587
wenzelm@52536
   588
fun exec_id id (tr as Transition {pos, ...}) =
wenzelm@52536
   589
  position (Position.put_id (Document_ID.print id) pos) tr;
wenzelm@25799
   590
wenzelm@25960
   591
fun setmp_thread_position (Transition {pos, ...}) f x =
wenzelm@25819
   592
  Position.setmp_thread_data pos f x;
wenzelm@25799
   593
wenzelm@27606
   594
fun status tr m =
wenzelm@43665
   595
  setmp_thread_position tr (fn () => Output.status (Markup.markup_only m)) ();
wenzelm@27606
   596
wenzelm@25799
   597
wenzelm@28095
   598
(* post-transition hooks *)
wenzelm@28095
   599
wenzelm@37905
   600
local
wenzelm@37905
   601
  val hooks = Unsynchronized.ref ([]: (transition -> state -> state -> unit) list);
wenzelm@37905
   602
in
wenzelm@28095
   603
wenzelm@32738
   604
fun add_hook f = CRITICAL (fn () => Unsynchronized.change hooks (cons f));
wenzelm@33223
   605
fun get_hooks () = ! hooks;
wenzelm@28095
   606
wenzelm@28095
   607
end;
wenzelm@28095
   608
wenzelm@28095
   609
wenzelm@5828
   610
(* apply transitions *)
wenzelm@5828
   611
wenzelm@51217
   612
fun get_timing (Transition {timing, ...}) = timing;
wenzelm@51658
   613
fun put_timing timing = map_transition (fn (name, pos, int_only, print, _, trans) =>
wenzelm@51658
   614
  (name, pos, int_only, print, timing, trans));
wenzelm@51217
   615
wenzelm@6664
   616
local
wenzelm@6664
   617
wenzelm@51658
   618
fun app int (tr as Transition {trans, print, ...}) =
wenzelm@25819
   619
  setmp_thread_position tr (fn state =>
wenzelm@25799
   620
    let
wenzelm@51595
   621
      val timing_start = Timing.start ();
wenzelm@25799
   622
wenzelm@51595
   623
      val (result, opt_err) =
wenzelm@51658
   624
         state |> (apply_trans int trans |> ! profiling > 0 ? profile (! profiling));
wenzelm@26621
   625
      val _ = if int andalso not (! quiet) andalso print then print_state false result else ();
wenzelm@51216
   626
wenzelm@51595
   627
      val timing_result = Timing.result timing_start;
wenzelm@51662
   628
      val timing_props =
wenzelm@51662
   629
        Markup.command_timing :: (Markup.nameN, name_of tr) :: Position.properties_of (pos_of tr);
wenzelm@51662
   630
      val _ = Timing.protocol_message timing_props timing_result;
wenzelm@51595
   631
    in
wenzelm@51595
   632
      (result, Option.map (fn UNDEF => type_error tr state | exn => exn) opt_err)
wenzelm@51595
   633
    end);
wenzelm@6664
   634
wenzelm@6664
   635
in
wenzelm@5828
   636
wenzelm@26602
   637
fun transition int tr st =
wenzelm@28095
   638
  let
wenzelm@28095
   639
    val hooks = get_hooks ();
wenzelm@28103
   640
    fun apply_hooks st' = hooks |> List.app (fn f => (try (fn () => f tr st st') (); ()));
wenzelm@28095
   641
wenzelm@28095
   642
    val ctxt = try context_of st;
wenzelm@28095
   643
    val res =
wenzelm@28095
   644
      (case app int tr st of
wenzelm@38888
   645
        (_, SOME Runtime.TERMINATE) => NONE
wenzelm@38888
   646
      | (st', SOME (Runtime.EXCURSION_FAIL exn_info)) => SOME (st', SOME exn_info)
wenzelm@31476
   647
      | (st', SOME exn) => SOME (st', SOME (Runtime.exn_context ctxt exn, at_command tr))
wenzelm@28103
   648
      | (st', NONE) => SOME (st', NONE));
wenzelm@28103
   649
    val _ = (case res of SOME (st', NONE) => apply_hooks st' | _ => ());
wenzelm@28095
   650
  in res end;
wenzelm@6664
   651
wenzelm@6664
   652
end;
wenzelm@5828
   653
wenzelm@5828
   654
wenzelm@51284
   655
(* managed commands *)
wenzelm@5828
   656
wenzelm@51323
   657
fun command_errors int tr st =
wenzelm@51323
   658
  (case transition int tr st of
wenzelm@51323
   659
    SOME (st', NONE) => ([], SOME st')
wenzelm@51323
   660
  | SOME (_, SOME (exn, _)) => (ML_Compiler.exn_messages_ids exn, NONE)
wenzelm@51323
   661
  | NONE => (ML_Compiler.exn_messages_ids Runtime.TERMINATE, NONE));
wenzelm@51323
   662
wenzelm@51284
   663
fun command_exception int tr st =
wenzelm@51284
   664
  (case transition int tr st of
wenzelm@28425
   665
    SOME (st', NONE) => st'
wenzelm@39285
   666
  | SOME (_, SOME (exn, info)) =>
wenzelm@39285
   667
      if Exn.is_interrupt exn then reraise exn else raise Runtime.EXCURSION_FAIL (exn, info)
wenzelm@38888
   668
  | NONE => raise Runtime.EXCURSION_FAIL (Runtime.TERMINATE, at_command tr));
wenzelm@27576
   669
wenzelm@51323
   670
fun command tr = command_exception (! interact) tr;
wenzelm@51284
   671
wenzelm@28433
   672
wenzelm@46959
   673
(* scheduled proof result *)
wenzelm@28433
   674
wenzelm@51332
   675
datatype result =
wenzelm@51332
   676
  Result of transition * state |
wenzelm@51332
   677
  Result_List of result list |
wenzelm@51332
   678
  Result_Future of result future;
wenzelm@51332
   679
wenzelm@51332
   680
fun join_results (Result x) = [x]
wenzelm@51332
   681
  | join_results (Result_List xs) = maps join_results xs
wenzelm@51332
   682
  | join_results (Result_Future x) = join_results (Future.join x);
wenzelm@51332
   683
wenzelm@51323
   684
local
wenzelm@51323
   685
wenzelm@47417
   686
structure Result = Proof_Data
wenzelm@28974
   687
(
wenzelm@51332
   688
  type T = result;
wenzelm@51332
   689
  val empty: T = Result_List [];
wenzelm@47417
   690
  fun init _ = empty;
wenzelm@28974
   691
);
wenzelm@28974
   692
wenzelm@51332
   693
val get_result = Result.get o Proof.context_of;
wenzelm@51332
   694
val put_result = Proof.map_context o Result.put;
wenzelm@51324
   695
wenzelm@51423
   696
fun timing_estimate include_head elem =
wenzelm@51423
   697
  let
wenzelm@51423
   698
    val trs = Thy_Syntax.flat_element elem |> not include_head ? tl;
wenzelm@51423
   699
    val timings = map get_timing trs;
wenzelm@51423
   700
  in
wenzelm@51423
   701
    if forall is_some timings then
wenzelm@51423
   702
      SOME (fold (curry Time.+ o the) timings Time.zeroTime)
wenzelm@51423
   703
    else NONE
wenzelm@51423
   704
  end;
wenzelm@51423
   705
wenzelm@51423
   706
fun priority NONE = ~1
wenzelm@51423
   707
  | priority (SOME estimate) =
wenzelm@51423
   708
      Int.min (Real.floor (Real.max (Math.log10 (Time.toReal estimate), ~3.0)) - 3, ~1);
wenzelm@51423
   709
wenzelm@51423
   710
fun proof_future_enabled estimate st =
wenzelm@51324
   711
  (case try proof_of st of
wenzelm@51324
   712
    NONE => false
wenzelm@51324
   713
  | SOME state =>
wenzelm@51324
   714
      not (Proof.is_relevant state) andalso
wenzelm@51324
   715
       (if can (Proof.assert_bottom true) state
wenzelm@51324
   716
        then Goal.future_enabled ()
wenzelm@51423
   717
        else
wenzelm@51423
   718
          (case estimate of
wenzelm@51423
   719
            NONE => Goal.future_enabled_nested 2
wenzelm@51423
   720
          | SOME t => Goal.future_enabled_timing t)));
wenzelm@51278
   721
wenzelm@51323
   722
fun atom_result tr st =
wenzelm@51323
   723
  let
wenzelm@51323
   724
    val st' =
wenzelm@51323
   725
      if Goal.future_enabled () andalso Keyword.is_diag (name_of tr) then
wenzelm@51605
   726
        (Goal.fork_params
wenzelm@51605
   727
          {name = "Toplevel.diag", pos = pos_of tr,
wenzelm@51605
   728
            pri = priority (timing_estimate true (Thy_Syntax.atom tr))}
wenzelm@51605
   729
          (fn () => command tr st); st)
wenzelm@51323
   730
      else command tr st;
wenzelm@51332
   731
  in (Result (tr, st'), st') end;
wenzelm@51323
   732
wenzelm@51323
   733
in
wenzelm@51323
   734
wenzelm@51332
   735
fun element_result (Thy_Syntax.Element (tr, NONE)) st = atom_result tr st
wenzelm@51423
   736
  | element_result (elem as Thy_Syntax.Element (head_tr, SOME element_rest)) st =
wenzelm@48633
   737
      let
wenzelm@51324
   738
        val (head_result, st') = atom_result head_tr st;
wenzelm@51332
   739
        val (body_elems, end_tr) = element_rest;
wenzelm@51423
   740
        val estimate = timing_estimate false elem;
wenzelm@51324
   741
      in
wenzelm@51423
   742
        if not (proof_future_enabled estimate st')
wenzelm@51324
   743
        then
wenzelm@51332
   744
          let
wenzelm@51332
   745
            val proof_trs = maps Thy_Syntax.flat_element body_elems @ [end_tr];
wenzelm@51332
   746
            val (proof_results, st'') = fold_map atom_result proof_trs st';
wenzelm@51332
   747
          in (Result_List (head_result :: proof_results), st'') end
wenzelm@51324
   748
        else
wenzelm@51324
   749
          let
wenzelm@51324
   750
            val finish = Context.Theory o Proof_Context.theory_of;
wenzelm@28974
   751
wenzelm@51605
   752
            val future_proof =
wenzelm@51605
   753
              Proof.future_proof (fn state =>
wenzelm@51605
   754
                Goal.fork_params
wenzelm@51605
   755
                  {name = "Toplevel.future_proof", pos = pos_of head_tr, pri = priority estimate}
wenzelm@51605
   756
                  (fn () =>
wenzelm@51605
   757
                    let
wenzelm@51605
   758
                      val State (SOME (Proof (prf, (_, orig_gthy))), prev) = st';
wenzelm@51605
   759
                      val prf' = Proof_Node.apply (K state) prf;
wenzelm@51605
   760
                      val (result, result_state) =
wenzelm@51605
   761
                        State (SOME (Proof (prf', (finish, orig_gthy))), prev)
wenzelm@51605
   762
                        |> fold_map element_result body_elems ||> command end_tr;
wenzelm@51605
   763
                    in (Result_List result, presentation_context_of result_state) end))
wenzelm@51332
   764
              #> (fn (res, state') => state' |> put_result (Result_Future res));
wenzelm@51332
   765
wenzelm@51332
   766
            val forked_proof =
wenzelm@51332
   767
              proof (future_proof #>
wenzelm@51332
   768
                (fn state => state |> Proof.local_done_proof |> put_result (get_result state))) o
wenzelm@51332
   769
              end_proof (fn _ => future_proof #>
wenzelm@51332
   770
                (fn state => state |> Proof.global_done_proof |> Result.put (get_result state)));
wenzelm@28974
   771
wenzelm@51324
   772
            val st'' = st'
wenzelm@51332
   773
              |> command (head_tr |> set_print false |> reset_trans |> forked_proof);
wenzelm@51332
   774
            val end_result = Result (end_tr, st'');
wenzelm@51324
   775
            val result =
wenzelm@51332
   776
              Result_List [head_result, Result.get (presentation_context_of st''), end_result];
wenzelm@51324
   777
          in (result, st'') end
wenzelm@51324
   778
      end;
wenzelm@28433
   779
wenzelm@6664
   780
end;
wenzelm@51323
   781
wenzelm@51323
   782
end;