src/Pure/Isar/toplevel.ML
author wenzelm
Tue Apr 09 15:59:02 2013 +0200 (2013-04-09 ago)
changeset 51661 92e58b76dbb1
parent 51658 21c10672633b
child 51662 3391a493f39a
permissions -rw-r--r--
clarified protocol_message undefinedness;
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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 get_id: transition -> string option
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  val put_id: string -> 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 approximative_id: transition -> {file: string, offset: int, name: string} option
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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 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
wenzelm@32792
   328
        handle Runtime.UNDEF => apply_tr int tr state
wenzelm@32792
   329
          | FAILURE (alt_state, UNDEF) => apply_tr int tr alt_state
wenzelm@6689
   330
          | exn as FAILURE _ => raise exn
wenzelm@6689
   331
          | exn => raise FAILURE (state, exn);
wenzelm@6689
   332
wenzelm@6689
   333
in
wenzelm@6689
   334
wenzelm@32792
   335
fun apply_trans int trs state = (apply_union int trs state, NONE)
skalberg@15531
   336
  handle FAILURE (alt_state, exn) => (alt_state, SOME exn) | exn => (state, SOME exn);
wenzelm@6689
   337
wenzelm@6689
   338
end;
wenzelm@5828
   339
wenzelm@5828
   340
wenzelm@5828
   341
(* datatype transition *)
wenzelm@5828
   342
wenzelm@5828
   343
datatype transition = Transition of
wenzelm@26621
   344
 {name: string,              (*command name*)
wenzelm@26621
   345
  pos: Position.T,           (*source position*)
wenzelm@26621
   346
  int_only: bool,            (*interactive-only*)
wenzelm@26621
   347
  print: bool,               (*print result state*)
wenzelm@51423
   348
  timing: Time.time option,  (*prescient timing information*)
wenzelm@26621
   349
  trans: trans list};        (*primitive transitions (union)*)
wenzelm@5828
   350
wenzelm@51658
   351
fun make_transition (name, pos, int_only, print, timing, trans) =
wenzelm@51217
   352
  Transition {name = name, pos = pos, int_only = int_only, print = print,
wenzelm@51658
   353
    timing = timing, trans = trans};
wenzelm@5828
   354
wenzelm@51658
   355
fun map_transition f (Transition {name, pos, int_only, print, timing, trans}) =
wenzelm@51658
   356
  make_transition (f (name, pos, int_only, print, timing, trans));
wenzelm@5828
   357
wenzelm@51658
   358
val empty = make_transition ("", Position.none, false, false, NONE, []);
wenzelm@5828
   359
wenzelm@5828
   360
wenzelm@5828
   361
(* diagnostics *)
wenzelm@5828
   362
wenzelm@38888
   363
fun print_of (Transition {print, ...}) = print;
wenzelm@27427
   364
fun name_of (Transition {name, ...}) = name;
wenzelm@28105
   365
fun pos_of (Transition {pos, ...}) = pos;
wenzelm@5828
   366
wenzelm@48993
   367
fun command_msg msg tr = msg ^ "command " ^ quote (name_of tr) ^ Position.here (pos_of tr);
wenzelm@38875
   368
fun at_command tr = command_msg "At " tr;
wenzelm@5828
   369
wenzelm@5828
   370
fun type_error tr state =
wenzelm@18685
   371
  ERROR (command_msg "Illegal application of " tr ^ " " ^ str_of_state state);
wenzelm@5828
   372
wenzelm@5828
   373
wenzelm@5828
   374
(* modify transitions *)
wenzelm@5828
   375
wenzelm@51658
   376
fun name name = map_transition (fn (_, pos, int_only, print, timing, trans) =>
wenzelm@51658
   377
  (name, pos, int_only, print, timing, trans));
wenzelm@9010
   378
wenzelm@51658
   379
fun position pos = map_transition (fn (name, _, int_only, print, timing, trans) =>
wenzelm@51658
   380
  (name, pos, int_only, print, timing, trans));
wenzelm@5828
   381
wenzelm@51658
   382
fun interactive int_only = map_transition (fn (name, pos, _, print, timing, trans) =>
wenzelm@51658
   383
  (name, pos, int_only, print, timing, trans));
wenzelm@14923
   384
wenzelm@51658
   385
fun add_trans tr = map_transition (fn (name, pos, int_only, print, timing, trans) =>
wenzelm@51658
   386
  (name, pos, int_only, print, timing, tr :: trans));
wenzelm@16607
   387
wenzelm@51658
   388
val reset_trans = map_transition (fn (name, pos, int_only, print, timing, _) =>
wenzelm@51658
   389
  (name, pos, int_only, print, timing, []));
wenzelm@28433
   390
wenzelm@51658
   391
fun set_print print = map_transition (fn (name, pos, int_only, _, timing, trans) =>
wenzelm@51658
   392
  (name, pos, int_only, print, timing, trans));
wenzelm@28453
   393
wenzelm@28453
   394
val print = set_print true;
wenzelm@5828
   395
wenzelm@5828
   396
wenzelm@21007
   397
(* basic transitions *)
wenzelm@5828
   398
wenzelm@44187
   399
fun init_theory f = add_trans (Init f);
wenzelm@37977
   400
wenzelm@44187
   401
fun is_init (Transition {trans = [Init _], ...}) = true
wenzelm@44187
   402
  | is_init _ = false;
wenzelm@44187
   403
wenzelm@44187
   404
fun modify_init f tr = if is_init tr then init_theory f (reset_trans tr) else tr;
wenzelm@37977
   405
wenzelm@6689
   406
val exit = add_trans Exit;
wenzelm@7612
   407
val keep' = add_trans o Keep;
wenzelm@30366
   408
wenzelm@30366
   409
fun present_transaction f g = add_trans (Transaction (f, g));
wenzelm@30366
   410
fun transaction f = present_transaction f (K ());
wenzelm@5828
   411
wenzelm@7612
   412
fun keep f = add_trans (Keep (fn _ => f));
wenzelm@5828
   413
fun imperative f = keep (fn _ => f ());
wenzelm@5828
   414
wenzelm@27840
   415
fun ignored pos = empty |> name "<ignored>" |> position pos |> imperative I;
wenzelm@51268
   416
fun is_ignored tr = name_of tr = "<ignored>";
wenzelm@48772
   417
wenzelm@48772
   418
val malformed_name = "<malformed>";
wenzelm@27840
   419
fun malformed pos msg =
wenzelm@48772
   420
  empty |> name malformed_name |> position pos |> imperative (fn () => error msg);
wenzelm@48772
   421
fun is_malformed tr = name_of tr = malformed_name;
wenzelm@27840
   422
wenzelm@21007
   423
val unknown_theory = imperative (fn () => warning "Unknown theory context");
wenzelm@21007
   424
val unknown_proof = imperative (fn () => warning "Unknown proof context");
wenzelm@21007
   425
val unknown_context = imperative (fn () => warning "Unknown context");
wenzelm@15668
   426
wenzelm@21007
   427
wenzelm@49012
   428
(* theory transitions *)
wenzelm@44304
   429
wenzelm@27601
   430
fun generic_theory f = transaction (fn _ =>
wenzelm@26491
   431
  (fn Theory (gthy, _) => Theory (f gthy, NONE)
wenzelm@26491
   432
    | _ => raise UNDEF));
wenzelm@26491
   433
wenzelm@27601
   434
fun theory' f = transaction (fn int =>
wenzelm@33725
   435
  (fn Theory (Context.Theory thy, _) =>
wenzelm@33725
   436
      let val thy' = thy
wenzelm@49012
   437
        |> Sign.new_group
wenzelm@49012
   438
        |> Theory.checkpoint
wenzelm@33725
   439
        |> f int
wenzelm@33725
   440
        |> Sign.reset_group;
wenzelm@33725
   441
      in Theory (Context.Theory thy', NONE) end
wenzelm@20963
   442
    | _ => raise UNDEF));
wenzelm@20963
   443
wenzelm@20963
   444
fun theory f = theory' (K f);
wenzelm@20963
   445
wenzelm@27601
   446
fun begin_local_theory begin f = transaction (fn _ =>
wenzelm@20963
   447
  (fn Theory (Context.Theory thy, _) =>
wenzelm@20963
   448
        let
wenzelm@20985
   449
          val lthy = f thy;
wenzelm@21294
   450
          val gthy = if begin then Context.Proof lthy else Context.Theory (loc_exit lthy);
wenzelm@21294
   451
        in Theory (gthy, SOME lthy) end
wenzelm@20963
   452
    | _ => raise UNDEF));
wenzelm@17076
   453
wenzelm@27601
   454
val end_local_theory = transaction (fn _ =>
wenzelm@21294
   455
  (fn Theory (Context.Proof lthy, _) => Theory (Context.Theory (loc_exit lthy), SOME lthy)
wenzelm@21007
   456
    | _ => raise UNDEF));
wenzelm@21007
   457
wenzelm@47069
   458
fun open_target f = transaction (fn _ =>
wenzelm@47069
   459
  (fn Theory (gthy, _) =>
wenzelm@47069
   460
        let val lthy = f gthy
wenzelm@47069
   461
        in Theory (Context.Proof lthy, SOME lthy) end
wenzelm@47069
   462
    | _ => raise UNDEF));
wenzelm@47069
   463
wenzelm@47069
   464
val close_target = transaction (fn _ =>
wenzelm@47069
   465
  (fn Theory (Context.Proof lthy, _) =>
wenzelm@47069
   466
        (case try Local_Theory.close_target lthy of
wenzelm@50739
   467
          SOME ctxt' =>
wenzelm@50739
   468
            let
wenzelm@50739
   469
              val gthy' =
wenzelm@50739
   470
                if can Local_Theory.assert ctxt'
wenzelm@50739
   471
                then Context.Proof ctxt'
wenzelm@50739
   472
                else Context.Theory (Proof_Context.theory_of ctxt');
wenzelm@50739
   473
            in Theory (gthy', SOME lthy) end
wenzelm@47069
   474
        | NONE => raise UNDEF)
wenzelm@47069
   475
    | _ => raise UNDEF));
wenzelm@47069
   476
wenzelm@47069
   477
wenzelm@21007
   478
local
wenzelm@21007
   479
wenzelm@30366
   480
fun local_theory_presentation loc f = present_transaction (fn int =>
wenzelm@21294
   481
  (fn Theory (gthy, _) =>
wenzelm@21294
   482
        let
wenzelm@49062
   483
          val (finish, lthy) = loc_begin loc gthy;
wenzelm@47274
   484
          val lthy' = lthy
wenzelm@49012
   485
            |> Local_Theory.new_group
wenzelm@33725
   486
            |> f int
wenzelm@33725
   487
            |> Local_Theory.reset_group;
wenzelm@21294
   488
        in Theory (finish lthy', SOME lthy') end
wenzelm@30366
   489
    | _ => raise UNDEF));
wenzelm@15668
   490
wenzelm@21007
   491
in
wenzelm@21007
   492
wenzelm@30366
   493
fun local_theory' loc f = local_theory_presentation loc f (K ());
wenzelm@29380
   494
fun local_theory loc f = local_theory' loc (K f);
wenzelm@30366
   495
fun present_local_theory loc = local_theory_presentation loc (K I);
wenzelm@18955
   496
wenzelm@21007
   497
end;
wenzelm@21007
   498
wenzelm@21007
   499
wenzelm@21007
   500
(* proof transitions *)
wenzelm@21007
   501
wenzelm@27601
   502
fun end_proof f = transaction (fn int =>
wenzelm@24795
   503
  (fn Proof (prf, (finish, _)) =>
wenzelm@33390
   504
        let val state = Proof_Node.current prf in
wenzelm@21007
   505
          if can (Proof.assert_bottom true) state then
wenzelm@21007
   506
            let
wenzelm@21007
   507
              val ctxt' = f int state;
wenzelm@21007
   508
              val gthy' = finish ctxt';
wenzelm@21007
   509
            in Theory (gthy', SOME ctxt') end
wenzelm@21007
   510
          else raise UNDEF
wenzelm@21007
   511
        end
wenzelm@51555
   512
    | Skipped_Proof (0, (gthy, _)) => Theory (gthy, NONE)
wenzelm@21007
   513
    | _ => raise UNDEF));
wenzelm@21007
   514
wenzelm@21294
   515
local
wenzelm@21294
   516
wenzelm@47274
   517
fun begin_proof init = transaction (fn int =>
wenzelm@21294
   518
  (fn Theory (gthy, _) =>
wenzelm@21294
   519
    let
wenzelm@47274
   520
      val (finish, prf) = init int gthy;
wenzelm@51553
   521
      val skip = ! Goal.skip_proofs;
wenzelm@40960
   522
      val (is_goal, no_skip) =
wenzelm@40960
   523
        (true, Proof.schematic_goal prf) handle ERROR _ => (false, true);
wenzelm@47274
   524
      val _ =
wenzelm@47274
   525
        if is_goal andalso skip andalso no_skip then
wenzelm@47274
   526
          warning "Cannot skip proof of schematic goal statement"
wenzelm@47274
   527
        else ();
wenzelm@21294
   528
    in
wenzelm@40960
   529
      if skip andalso not no_skip then
wenzelm@51555
   530
        Skipped_Proof (0, (finish (Proof.global_skip_proof true prf), gthy))
wenzelm@47274
   531
      else Proof (Proof_Node.init prf, (finish, gthy))
wenzelm@21294
   532
    end
wenzelm@21294
   533
  | _ => raise UNDEF));
wenzelm@21294
   534
wenzelm@21294
   535
in
wenzelm@21294
   536
wenzelm@24780
   537
fun local_theory_to_proof' loc f = begin_proof
wenzelm@47274
   538
  (fn int => fn gthy =>
wenzelm@49062
   539
    let val (finish, lthy) = loc_begin loc gthy
wenzelm@49012
   540
    in (finish o Local_Theory.reset_group, f int (Local_Theory.new_group lthy)) end);
wenzelm@24780
   541
berghofe@24453
   542
fun local_theory_to_proof loc f = local_theory_to_proof' loc (K f);
wenzelm@21294
   543
wenzelm@21294
   544
fun theory_to_proof f = begin_proof
wenzelm@47274
   545
  (fn _ => fn gthy =>
wenzelm@51560
   546
    (Context.Theory o Theory.checkpoint o Sign.reset_group o Proof_Context.theory_of,
wenzelm@49062
   547
      (case gthy of
wenzelm@49012
   548
        Context.Theory thy => f (Theory.checkpoint (Sign.new_group thy))
wenzelm@49012
   549
      | _ => raise UNDEF)));
wenzelm@21294
   550
wenzelm@21294
   551
end;
wenzelm@21294
   552
wenzelm@27601
   553
val forget_proof = transaction (fn _ =>
wenzelm@21007
   554
  (fn Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@51555
   555
    | Skipped_Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@21007
   556
    | _ => raise UNDEF));
wenzelm@21007
   557
wenzelm@30366
   558
val present_proof = present_transaction (fn _ =>
wenzelm@49062
   559
  (fn Proof (prf, x) => Proof (Proof_Node.apply I prf, x)
wenzelm@51555
   560
    | skip as Skipped_Proof _ => skip
wenzelm@30366
   561
    | _ => raise UNDEF));
wenzelm@21177
   562
wenzelm@27601
   563
fun proofs' f = transaction (fn int =>
wenzelm@49062
   564
  (fn Proof (prf, x) => Proof (Proof_Node.applys (f int) prf, x)
wenzelm@51555
   565
    | skip as Skipped_Proof _ => skip
wenzelm@16815
   566
    | _ => raise UNDEF));
wenzelm@15668
   567
wenzelm@49863
   568
fun proof' f = proofs' ((Seq.single o Seq.Result) oo f);
wenzelm@17904
   569
val proofs = proofs' o K;
wenzelm@6689
   570
val proof = proof' o K;
wenzelm@16815
   571
wenzelm@27601
   572
fun actual_proof f = transaction (fn _ =>
wenzelm@21007
   573
  (fn Proof (prf, x) => Proof (f prf, x)
wenzelm@20963
   574
    | _ => raise UNDEF));
wenzelm@16815
   575
wenzelm@27601
   576
fun skip_proof f = transaction (fn _ =>
wenzelm@51555
   577
  (fn Skipped_Proof (h, x) => Skipped_Proof (f h, x)
wenzelm@18563
   578
    | _ => raise UNDEF));
wenzelm@18563
   579
wenzelm@27601
   580
fun skip_proof_to_theory pred = transaction (fn _ =>
wenzelm@51555
   581
  (fn Skipped_Proof (d, (gthy, _)) => if pred d then Theory (gthy, NONE) else raise UNDEF
wenzelm@33725
   582
    | _ => raise UNDEF));
wenzelm@5828
   583
wenzelm@5828
   584
wenzelm@5828
   585
wenzelm@5828
   586
(** toplevel transactions **)
wenzelm@5828
   587
wenzelm@27427
   588
(* identification *)
wenzelm@27427
   589
wenzelm@27427
   590
fun get_id (Transition {pos, ...}) = Position.get_id pos;
wenzelm@27427
   591
fun put_id id (tr as Transition {pos, ...}) = position (Position.put_id id pos) tr;
wenzelm@27427
   592
wenzelm@27427
   593
wenzelm@51228
   594
(* approximative identification within source file *)
wenzelm@51228
   595
wenzelm@51228
   596
fun approximative_id tr =
wenzelm@51228
   597
  let
wenzelm@51228
   598
    val name = name_of tr;
wenzelm@51228
   599
    val pos = pos_of tr;
wenzelm@51228
   600
  in
wenzelm@51228
   601
    (case (Position.file_of pos, Position.offset_of pos) of
wenzelm@51228
   602
      (SOME file, SOME offset) => SOME {file = file, offset = offset, name = name}
wenzelm@51228
   603
    | _ => NONE)
wenzelm@51228
   604
  end;
wenzelm@51228
   605
wenzelm@51228
   606
wenzelm@25960
   607
(* thread position *)
wenzelm@25799
   608
wenzelm@25960
   609
fun setmp_thread_position (Transition {pos, ...}) f x =
wenzelm@25819
   610
  Position.setmp_thread_data pos f x;
wenzelm@25799
   611
wenzelm@27606
   612
fun status tr m =
wenzelm@43665
   613
  setmp_thread_position tr (fn () => Output.status (Markup.markup_only m)) ();
wenzelm@27606
   614
wenzelm@25799
   615
wenzelm@28095
   616
(* post-transition hooks *)
wenzelm@28095
   617
wenzelm@37905
   618
local
wenzelm@37905
   619
  val hooks = Unsynchronized.ref ([]: (transition -> state -> state -> unit) list);
wenzelm@37905
   620
in
wenzelm@28095
   621
wenzelm@32738
   622
fun add_hook f = CRITICAL (fn () => Unsynchronized.change hooks (cons f));
wenzelm@33223
   623
fun get_hooks () = ! hooks;
wenzelm@28095
   624
wenzelm@28095
   625
end;
wenzelm@28095
   626
wenzelm@28095
   627
wenzelm@5828
   628
(* apply transitions *)
wenzelm@5828
   629
wenzelm@51217
   630
fun get_timing (Transition {timing, ...}) = timing;
wenzelm@51658
   631
fun put_timing timing = map_transition (fn (name, pos, int_only, print, _, trans) =>
wenzelm@51658
   632
  (name, pos, int_only, print, timing, trans));
wenzelm@51217
   633
wenzelm@6664
   634
local
wenzelm@6664
   635
wenzelm@51658
   636
fun app int (tr as Transition {trans, print, ...}) =
wenzelm@25819
   637
  setmp_thread_position tr (fn state =>
wenzelm@25799
   638
    let
wenzelm@51595
   639
      val timing_start = Timing.start ();
wenzelm@25799
   640
wenzelm@51595
   641
      val (result, opt_err) =
wenzelm@51658
   642
         state |> (apply_trans int trans |> ! profiling > 0 ? profile (! profiling));
wenzelm@26621
   643
      val _ = if int andalso not (! quiet) andalso print then print_state false result else ();
wenzelm@51216
   644
wenzelm@51595
   645
      val timing_result = Timing.result timing_start;
wenzelm@51595
   646
wenzelm@51595
   647
      val _ =
wenzelm@51658
   648
        if Timing.is_relevant timing_result andalso (! profiling > 0 orelse ! timing)
wenzelm@51658
   649
          andalso not (Keyword.is_control (name_of tr))
wenzelm@51658
   650
        then tracing (command_msg "" tr ^ ": " ^ Timing.message timing_result)
wenzelm@51595
   651
        else ();
wenzelm@51595
   652
      val _ =
wenzelm@51595
   653
        if Timing.is_relevant timing_result
wenzelm@51595
   654
        then status tr (Markup.timing timing_result)
wenzelm@51595
   655
        else ();
wenzelm@51595
   656
      val _ =
wenzelm@51595
   657
        (case approximative_id tr of
wenzelm@51595
   658
          SOME id =>
wenzelm@51661
   659
            (Output.try_protocol_message
wenzelm@51595
   660
              (Markup.command_timing ::
wenzelm@51661
   661
                Markup.command_timing_properties id (#elapsed timing_result)) "")
wenzelm@51595
   662
        | NONE => ());
wenzelm@51595
   663
    in
wenzelm@51595
   664
      (result, Option.map (fn UNDEF => type_error tr state | exn => exn) opt_err)
wenzelm@51595
   665
    end);
wenzelm@6664
   666
wenzelm@6664
   667
in
wenzelm@5828
   668
wenzelm@26602
   669
fun transition int tr st =
wenzelm@28095
   670
  let
wenzelm@28095
   671
    val hooks = get_hooks ();
wenzelm@28103
   672
    fun apply_hooks st' = hooks |> List.app (fn f => (try (fn () => f tr st st') (); ()));
wenzelm@28095
   673
wenzelm@28095
   674
    val ctxt = try context_of st;
wenzelm@28095
   675
    val res =
wenzelm@28095
   676
      (case app int tr st of
wenzelm@38888
   677
        (_, SOME Runtime.TERMINATE) => NONE
wenzelm@38888
   678
      | (st', SOME (Runtime.EXCURSION_FAIL exn_info)) => SOME (st', SOME exn_info)
wenzelm@31476
   679
      | (st', SOME exn) => SOME (st', SOME (Runtime.exn_context ctxt exn, at_command tr))
wenzelm@28103
   680
      | (st', NONE) => SOME (st', NONE));
wenzelm@28103
   681
    val _ = (case res of SOME (st', NONE) => apply_hooks st' | _ => ());
wenzelm@28095
   682
  in res end;
wenzelm@6664
   683
wenzelm@6664
   684
end;
wenzelm@5828
   685
wenzelm@5828
   686
wenzelm@51284
   687
(* managed commands *)
wenzelm@5828
   688
wenzelm@51323
   689
fun command_errors int tr st =
wenzelm@51323
   690
  (case transition int tr st of
wenzelm@51323
   691
    SOME (st', NONE) => ([], SOME st')
wenzelm@51323
   692
  | SOME (_, SOME (exn, _)) => (ML_Compiler.exn_messages_ids exn, NONE)
wenzelm@51323
   693
  | NONE => (ML_Compiler.exn_messages_ids Runtime.TERMINATE, NONE));
wenzelm@51323
   694
wenzelm@51284
   695
fun command_exception int tr st =
wenzelm@51284
   696
  (case transition int tr st of
wenzelm@28425
   697
    SOME (st', NONE) => st'
wenzelm@39285
   698
  | SOME (_, SOME (exn, info)) =>
wenzelm@39285
   699
      if Exn.is_interrupt exn then reraise exn else raise Runtime.EXCURSION_FAIL (exn, info)
wenzelm@38888
   700
  | NONE => raise Runtime.EXCURSION_FAIL (Runtime.TERMINATE, at_command tr));
wenzelm@27576
   701
wenzelm@51323
   702
fun command tr = command_exception (! interact) tr;
wenzelm@51284
   703
wenzelm@28433
   704
wenzelm@46959
   705
(* scheduled proof result *)
wenzelm@28433
   706
wenzelm@51332
   707
datatype result =
wenzelm@51332
   708
  Result of transition * state |
wenzelm@51332
   709
  Result_List of result list |
wenzelm@51332
   710
  Result_Future of result future;
wenzelm@51332
   711
wenzelm@51332
   712
fun join_results (Result x) = [x]
wenzelm@51332
   713
  | join_results (Result_List xs) = maps join_results xs
wenzelm@51332
   714
  | join_results (Result_Future x) = join_results (Future.join x);
wenzelm@51332
   715
wenzelm@51323
   716
local
wenzelm@51323
   717
wenzelm@47417
   718
structure Result = Proof_Data
wenzelm@28974
   719
(
wenzelm@51332
   720
  type T = result;
wenzelm@51332
   721
  val empty: T = Result_List [];
wenzelm@47417
   722
  fun init _ = empty;
wenzelm@28974
   723
);
wenzelm@28974
   724
wenzelm@51332
   725
val get_result = Result.get o Proof.context_of;
wenzelm@51332
   726
val put_result = Proof.map_context o Result.put;
wenzelm@51324
   727
wenzelm@51423
   728
fun timing_estimate include_head elem =
wenzelm@51423
   729
  let
wenzelm@51423
   730
    val trs = Thy_Syntax.flat_element elem |> not include_head ? tl;
wenzelm@51423
   731
    val timings = map get_timing trs;
wenzelm@51423
   732
  in
wenzelm@51423
   733
    if forall is_some timings then
wenzelm@51423
   734
      SOME (fold (curry Time.+ o the) timings Time.zeroTime)
wenzelm@51423
   735
    else NONE
wenzelm@51423
   736
  end;
wenzelm@51423
   737
wenzelm@51423
   738
fun priority NONE = ~1
wenzelm@51423
   739
  | priority (SOME estimate) =
wenzelm@51423
   740
      Int.min (Real.floor (Real.max (Math.log10 (Time.toReal estimate), ~3.0)) - 3, ~1);
wenzelm@51423
   741
wenzelm@51423
   742
fun proof_future_enabled estimate st =
wenzelm@51324
   743
  (case try proof_of st of
wenzelm@51324
   744
    NONE => false
wenzelm@51324
   745
  | SOME state =>
wenzelm@51324
   746
      not (Proof.is_relevant state) andalso
wenzelm@51324
   747
       (if can (Proof.assert_bottom true) state
wenzelm@51324
   748
        then Goal.future_enabled ()
wenzelm@51423
   749
        else
wenzelm@51423
   750
          (case estimate of
wenzelm@51423
   751
            NONE => Goal.future_enabled_nested 2
wenzelm@51423
   752
          | SOME t => Goal.future_enabled_timing t)));
wenzelm@51278
   753
wenzelm@51323
   754
fun atom_result tr st =
wenzelm@51323
   755
  let
wenzelm@51323
   756
    val st' =
wenzelm@51323
   757
      if Goal.future_enabled () andalso Keyword.is_diag (name_of tr) then
wenzelm@51605
   758
        (Goal.fork_params
wenzelm@51605
   759
          {name = "Toplevel.diag", pos = pos_of tr,
wenzelm@51605
   760
            pri = priority (timing_estimate true (Thy_Syntax.atom tr))}
wenzelm@51605
   761
          (fn () => command tr st); st)
wenzelm@51323
   762
      else command tr st;
wenzelm@51332
   763
  in (Result (tr, st'), st') end;
wenzelm@51323
   764
wenzelm@51323
   765
in
wenzelm@51323
   766
wenzelm@51332
   767
fun element_result (Thy_Syntax.Element (tr, NONE)) st = atom_result tr st
wenzelm@51423
   768
  | element_result (elem as Thy_Syntax.Element (head_tr, SOME element_rest)) st =
wenzelm@48633
   769
      let
wenzelm@51324
   770
        val (head_result, st') = atom_result head_tr st;
wenzelm@51332
   771
        val (body_elems, end_tr) = element_rest;
wenzelm@51423
   772
        val estimate = timing_estimate false elem;
wenzelm@51324
   773
      in
wenzelm@51423
   774
        if not (proof_future_enabled estimate st')
wenzelm@51324
   775
        then
wenzelm@51332
   776
          let
wenzelm@51332
   777
            val proof_trs = maps Thy_Syntax.flat_element body_elems @ [end_tr];
wenzelm@51332
   778
            val (proof_results, st'') = fold_map atom_result proof_trs st';
wenzelm@51332
   779
          in (Result_List (head_result :: proof_results), st'') end
wenzelm@51324
   780
        else
wenzelm@51324
   781
          let
wenzelm@51324
   782
            val finish = Context.Theory o Proof_Context.theory_of;
wenzelm@28974
   783
wenzelm@51605
   784
            val future_proof =
wenzelm@51605
   785
              Proof.future_proof (fn state =>
wenzelm@51605
   786
                Goal.fork_params
wenzelm@51605
   787
                  {name = "Toplevel.future_proof", pos = pos_of head_tr, pri = priority estimate}
wenzelm@51605
   788
                  (fn () =>
wenzelm@51605
   789
                    let
wenzelm@51605
   790
                      val State (SOME (Proof (prf, (_, orig_gthy))), prev) = st';
wenzelm@51605
   791
                      val prf' = Proof_Node.apply (K state) prf;
wenzelm@51605
   792
                      val (result, result_state) =
wenzelm@51605
   793
                        State (SOME (Proof (prf', (finish, orig_gthy))), prev)
wenzelm@51605
   794
                        |> fold_map element_result body_elems ||> command end_tr;
wenzelm@51605
   795
                    in (Result_List result, presentation_context_of result_state) end))
wenzelm@51332
   796
              #> (fn (res, state') => state' |> put_result (Result_Future res));
wenzelm@51332
   797
wenzelm@51332
   798
            val forked_proof =
wenzelm@51332
   799
              proof (future_proof #>
wenzelm@51332
   800
                (fn state => state |> Proof.local_done_proof |> put_result (get_result state))) o
wenzelm@51332
   801
              end_proof (fn _ => future_proof #>
wenzelm@51332
   802
                (fn state => state |> Proof.global_done_proof |> Result.put (get_result state)));
wenzelm@28974
   803
wenzelm@51324
   804
            val st'' = st'
wenzelm@51332
   805
              |> command (head_tr |> set_print false |> reset_trans |> forked_proof);
wenzelm@51332
   806
            val end_result = Result (end_tr, st'');
wenzelm@51324
   807
            val result =
wenzelm@51332
   808
              Result_List [head_result, Result.get (presentation_context_of st''), end_result];
wenzelm@51324
   809
          in (result, st'') end
wenzelm@51324
   810
      end;
wenzelm@28433
   811
wenzelm@6664
   812
end;
wenzelm@51323
   813
wenzelm@51323
   814
end;