src/Pure/Isar/toplevel.ML
author wenzelm
Mon Jul 23 19:45:47 2007 +0200 (2007-07-23 ago)
changeset 23940 f2181804fced
parent 23911 2807ecdc853d
child 23963 c2ee97a963db
permissions -rw-r--r--
marked some CRITICAL sections;
eliminated transform_failure (to avoid critical section for main transactions);
removed unused exceptions MetaSimplifier.SIMPROC_FAIL, Attrib.ATTRIB_FAIL, Method.METHOD_FAIL, Antiquote.ANTIQUOTE_FAIL;
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(*  Title:      Pure/Isar/toplevel.ML
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    ID:         $Id$
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    Author:     Markus Wenzel, TU Muenchen
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The Isabelle/Isar toplevel.
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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 generic_theory
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  type node
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  val theory_node: node -> generic_theory option
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  val proof_node: node -> ProofHistory.T option
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  val cases_node: (generic_theory -> 'a) -> (Proof.state -> 'a) -> node -> 'a
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  val presentation_context: node option -> xstring option -> Proof.context
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  type 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 level: state -> int
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  val node_history_of: state -> node History.T
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  val node_of: state -> node
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  val node_case: (generic_theory -> 'a) -> (Proof.state -> 'a) -> state -> 'a
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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 enter_proof_body: state -> Proof.state
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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 quiet: bool ref
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  val debug: bool ref
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  val interact: bool ref
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  val timing: bool ref
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  val profiling: int ref
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  val skip_proofs: bool ref
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  exception TERMINATE
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  exception RESTART
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  val exn_message: exn -> string
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  val program: (unit -> 'a) -> 'a
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  type transition
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  val undo_limit: bool -> int option
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  val empty: transition
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  val name_of: transition -> string
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  val source_of: transition -> OuterLex.token list option
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  val name: string -> transition -> transition
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  val position: Position.T -> transition -> transition
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  val source: OuterLex.token list -> transition -> transition
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  val interactive: bool -> transition -> transition
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  val print: transition -> transition
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  val print': string -> transition -> transition
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  val three_buffersN: string
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  val print3: transition -> transition
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  val no_timing: transition -> transition
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  val init_theory: (bool -> theory) -> (theory -> unit) -> (theory -> unit) ->
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    transition -> transition
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  val init_empty: (unit -> unit) -> transition -> transition
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  val exit: transition -> transition
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  val undo_exit: transition -> transition
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  val kill: transition -> transition
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  val history: (node History.T -> node History.T) -> 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 theory: (theory -> theory) -> transition -> transition
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  val theory': (bool -> 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 local_theory: xstring option -> (local_theory -> local_theory) -> transition -> transition
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  val present_local_theory: xstring option -> (bool -> node -> unit) -> transition -> transition
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  val local_theory_to_proof: xstring option -> (local_theory -> Proof.state) ->
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    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: (bool -> node -> unit) -> transition -> transition
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  val proofs': (bool -> Proof.state -> Proof.state 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.seq) -> transition -> transition
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  val proof: (Proof.state -> Proof.state) -> transition -> transition
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  val actual_proof: (ProofHistory.T -> ProofHistory.T) -> transition -> transition
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  val skip_proof: (int History.T -> int History.T) -> transition -> transition
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  val skip_proof_to_theory: (int -> bool) -> 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 present_excursion: (transition * (state -> state -> 'a -> 'a)) list -> 'a -> 'a
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  val excursion: transition list -> unit
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  val set_state: state -> unit
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  val get_state: unit -> state
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  val exn: unit -> (exn * string) option
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  val >> : transition -> bool
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  val >>> : transition list -> unit
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  val init_state: unit -> unit
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  type 'a isar
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  val loop: 'a isar -> unit
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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;
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(* local theory wrappers *)
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type generic_theory = Context.generic;    (*theory or local_theory*)
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val loc_init = TheoryTarget.init;
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val loc_exit = ProofContext.theory_of o LocalTheory.exit;
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fun loc_begin loc (Context.Theory thy) = loc_init loc thy
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  | loc_begin NONE (Context.Proof lthy) = lthy
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  | loc_begin loc (Context.Proof lthy) = loc_init loc (loc_exit lthy);
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fun loc_finish _ (Context.Theory _) = Context.Theory o loc_exit
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  | loc_finish NONE (Context.Proof _) = Context.Proof o LocalTheory.restore
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  | loc_finish (SOME _) (Context.Proof lthy) = Context.Proof o LocalTheory.reinit lthy o loc_exit;
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(* datatype node *)
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datatype node =
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  Theory of generic_theory * Proof.context option | (*theory with presentation context*)
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  Proof of ProofHistory.T * ((Proof.context -> generic_theory) * generic_theory) |
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    (*history of proof states, finish, original theory*)
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  SkipProof of int History.T * (generic_theory * generic_theory);
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    (*history of proof depths, resulting theory, original theory*)
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val the_global_theory = fn Theory (Context.Theory thy, _) => thy | _ => raise UNDEF;
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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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fun cases_node f _ (Theory (gthy, _)) = f gthy
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  | cases_node _ g (Proof (prf, _)) = g (ProofHistory.current prf)
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  | cases_node f _ (SkipProof (_, (gthy, _))) = f gthy;
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fun presentation_context (SOME (Theory (_, SOME ctxt))) NONE = ctxt
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  | presentation_context (SOME node) NONE = cases_node Context.proof_of Proof.context_of node
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  | presentation_context (SOME node) (SOME loc) =
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      loc_init (SOME loc) (cases_node Context.theory_of Proof.theory_of node)
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  | presentation_context NONE _ = raise UNDEF;
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(* datatype state *)
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type state_info = node History.T * ((theory -> unit) * (theory -> unit));
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datatype state =
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  Toplevel of state_info option |  (*outer toplevel, leftover end state*)
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  State of state_info;
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val toplevel = Toplevel NONE;
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fun is_toplevel (Toplevel _) = true
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  | is_toplevel _ = false;
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fun level (Toplevel _) = 0
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  | level (State (node, _)) =
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      (case History.current node of
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        Theory _ => 0
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      | Proof (prf, _) => Proof.level (ProofHistory.current prf)
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      | SkipProof (h, _) => History.current h + 1);   (*different notion of proof depth!*)
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fun str_of_state (Toplevel _) = "at top level"
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  | str_of_state (State (node, _)) =
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      (case History.current node of
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        Theory (Context.Theory _, _) => "in theory mode"
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      | Theory (Context.Proof _, _) => "in local theory mode"
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      | Proof _ => "in proof mode"
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      | SkipProof _ => "in skipped proof mode");
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(* top node *)
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fun node_history_of (Toplevel _) = raise UNDEF
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  | node_history_of (State (node, _)) = node;
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val node_of = History.current o node_history_of;
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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 node_case f g state = cases_node f g (node_of state);
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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, _) => ProofHistory.position prf
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  | _ => raise UNDEF);
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val enter_proof_body = node_case (Proof.init o Context.proof_of) Proof.enter_forward;
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(* print state *)
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val pretty_context = LocalTheory.pretty o Context.cases (loc_init NONE) I;
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fun print_state_context state =
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  (case try (node_case I (Context.Proof o Proof.context_of)) state of
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    NONE => []
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  | SOME 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 (ProofHistory.position prf) (ProofHistory.current prf)
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  | SOME (SkipProof (h, _)) =>
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      [Pretty.str ("skipped proof: depth " ^ string_of_int (History.current h))])
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  |> Pretty.markup_chunks Markup.state |> Pretty.writeln;
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(** toplevel transitions **)
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val quiet = ref false;
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val debug = Output.debugging;
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val interact = ref false;
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val timing = Output.timing;
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val profiling = ref 0;
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val skip_proofs = ref false;
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exception TERMINATE;
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exception RESTART;
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exception EXCURSION_FAIL of exn * string;
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exception FAILURE of state * exn;
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(* print exceptions *)
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local
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fun with_context f xs =
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  (case ML_Context.get_context () of NONE => []
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  | SOME context => map (f (Context.proof_of context)) xs);
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fun raised name [] = "exception " ^ name ^ " raised"
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  | raised name [msg] = "exception " ^ name ^ " raised: " ^ msg
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  | raised name msgs = cat_lines (("exception " ^ name ^ " raised:") :: msgs);
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fun exn_msg _ TERMINATE = "Exit."
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  | exn_msg _ RESTART = "Restart."
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  | exn_msg _ Interrupt = "Interrupt."
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  | exn_msg _ Output.TOPLEVEL_ERROR = "Error."
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  | exn_msg _ (SYS_ERROR msg) = "## SYSTEM ERROR ##\n" ^ msg
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  | exn_msg _ (ERROR msg) = msg
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  | exn_msg detailed (EXCEPTION (exn, msg)) = cat_lines [exn_msg detailed exn, msg]
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  | exn_msg detailed (EXCURSION_FAIL (exn, msg)) = cat_lines [exn_msg detailed exn, msg]
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  | exn_msg false (THEORY (msg, _)) = msg
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  | exn_msg true (THEORY (msg, thys)) = raised "THEORY" (msg :: map Context.str_of_thy thys)
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  | exn_msg false (Syntax.AST (msg, _)) = raised "AST" [msg]
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  | exn_msg true (Syntax.AST (msg, asts)) =
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      raised "AST" (msg :: map (Pretty.string_of o Syntax.pretty_ast) asts)
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  | exn_msg false (TYPE (msg, _, _)) = raised "TYPE" [msg]
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  | exn_msg true (TYPE (msg, Ts, ts)) = raised "TYPE" (msg ::
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        with_context ProofContext.string_of_typ Ts @ with_context ProofContext.string_of_term ts)
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  | exn_msg false (TERM (msg, _)) = raised "TERM" [msg]
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  | exn_msg true (TERM (msg, ts)) =
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      raised "TERM" (msg :: with_context ProofContext.string_of_term ts)
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  | exn_msg false (THM (msg, _, _)) = raised "THM" [msg]
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  | exn_msg true (THM (msg, i, thms)) =
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      raised ("THM " ^ string_of_int i) (msg :: with_context ProofContext.string_of_thm thms)
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  | exn_msg _ Option.Option = raised "Option" []
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  | exn_msg _ Library.UnequalLengths = raised "UnequalLengths" []
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  | exn_msg _ Empty = raised "Empty" []
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  | exn_msg _ Subscript = raised "Subscript" []
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  | exn_msg _ (Fail msg) = raised "Fail" [msg]
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  | exn_msg _ exn = General.exnMessage exn;
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in
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fun exn_message exn = exn_msg (! debug) exn;
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fun print_exn NONE = ()
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  | print_exn (SOME (exn, s)) = Output.error_msg (cat_lines [exn_message exn, s]);
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end;
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(* controlled execution *)
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local
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fun debugging f x =
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  if ! debug then exception_trace (fn () => f x)
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  else f x;
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fun interruptible f x =
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  let val y = ref x
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  in raise_interrupt (fn () => y := f x) (); ! y end;
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in
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fun controlled_execution f =
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  f
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  |> debugging
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  |> interruptible
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  |> setmp Output.do_toplevel_errors false;
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fun program f =
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  Output.ML_errors (fn () => debugging f () handle exn => error (exn_message exn)) ();
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end;
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(* node transactions and recovery from stale theories *)
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(*NB: proof commands should be non-destructive!*)
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local
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fun is_stale state = Context.is_stale (theory_of state) handle UNDEF => false;
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val stale_theory = ERROR "Stale theory encountered after succesful execution!";
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fun map_theory f = History.map_current
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  (fn Theory (gthy, _) => Theory (Context.mapping f (LocalTheory.raw_theory f) gthy, NONE)
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    | node => node);
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wenzelm@23363
   333
fun context_position pos = History.map_current
wenzelm@23363
   334
  (fn Theory (Context.Proof lthy, ctxt) =>
wenzelm@23363
   335
        Theory (Context.Proof (ContextPosition.put pos lthy), ctxt)
wenzelm@23363
   336
    | Proof (prf, x) =>
wenzelm@23363
   337
        Proof (ProofHistory.map_current (Proof.map_context (ContextPosition.put pos)) prf, x)
wenzelm@23363
   338
    | node => node);
wenzelm@23363
   339
skalberg@15531
   340
fun return (result, NONE) = result
skalberg@15531
   341
  | return (result, SOME exn) = raise FAILURE (result, exn);
wenzelm@7022
   342
wenzelm@6689
   343
in
wenzelm@6689
   344
wenzelm@23363
   345
fun transaction hist pos f (node, term) =
wenzelm@20128
   346
  let
wenzelm@21177
   347
    val cont_node = map_theory Theory.checkpoint node;
wenzelm@21177
   348
    val back_node = map_theory Theory.copy cont_node;
wenzelm@21958
   349
    fun state nd = State (nd, term);
wenzelm@20128
   350
    fun normal_state nd = (state nd, NONE);
wenzelm@20128
   351
    fun error_state nd exn = (state nd, SOME exn);
wenzelm@6689
   352
wenzelm@20128
   353
    val (result, err) =
wenzelm@20128
   354
      cont_node
wenzelm@23363
   355
      |> context_position pos
wenzelm@20128
   356
      |> (f
wenzelm@23363
   357
          |> (if hist then History.apply' (History.current back_node) else History.map_current)
wenzelm@20128
   358
          |> controlled_execution)
wenzelm@23363
   359
      |> context_position Position.none
wenzelm@20128
   360
      |> normal_state
wenzelm@20128
   361
      handle exn => error_state cont_node exn;
wenzelm@20128
   362
  in
wenzelm@20128
   363
    if is_stale result
wenzelm@20128
   364
    then return (error_state back_node (the_default stale_theory err))
wenzelm@20128
   365
    else return (result, err)
wenzelm@20128
   366
  end;
wenzelm@6689
   367
wenzelm@6689
   368
end;
wenzelm@6689
   369
wenzelm@6689
   370
wenzelm@6689
   371
(* primitive transitions *)
wenzelm@6689
   372
wenzelm@18563
   373
(*Note: Recovery from stale theories is provided only for theory-level
wenzelm@18589
   374
  operations via Transaction.  Other node or state operations should
wenzelm@18589
   375
  not touch theories at all.  Interrupts are enabled only for Keep and
wenzelm@18589
   376
  Transaction.*)
wenzelm@5828
   377
wenzelm@5828
   378
datatype trans =
wenzelm@22056
   379
  Init of (bool -> theory) * ((theory -> unit) * (theory -> unit)) |
wenzelm@21958
   380
                                                    (*init node; with exit/kill operation*)
wenzelm@23911
   381
  InitEmpty of unit -> unit |                       (*init empty toplevel*)
wenzelm@21958
   382
  Exit |                                            (*conclude node -- deferred until init*)
wenzelm@21958
   383
  UndoExit |                                        (*continue after conclusion*)
wenzelm@21958
   384
  Kill |                                            (*abort node*)
wenzelm@21958
   385
  History of node History.T -> node History.T |     (*history operation (undo etc.)*)
wenzelm@21958
   386
  Keep of bool -> state -> unit |                   (*peek at state*)
wenzelm@21958
   387
  Transaction of bool * (bool -> node -> node);     (*node transaction*)
wenzelm@6689
   388
skalberg@15531
   389
fun undo_limit int = if int then NONE else SOME 0;
wenzelm@6689
   390
wenzelm@22056
   391
fun safe_exit (Toplevel (SOME (node, (exit, _)))) =
wenzelm@22056
   392
    (case try the_global_theory (History.current node) of
wenzelm@22056
   393
      SOME thy => exit thy
wenzelm@22056
   394
    | NONE => ())
wenzelm@22056
   395
  | safe_exit _ = ();
wenzelm@21958
   396
wenzelm@6689
   397
local
wenzelm@5828
   398
wenzelm@21958
   399
fun keep_state int f = controlled_execution (fn x => tap (f int) x);
wenzelm@21958
   400
wenzelm@23363
   401
fun apply_tr int _ (Init (f, term)) (state as Toplevel _) =
wenzelm@22056
   402
      let val node = Theory (Context.Theory (f int), NONE)
wenzelm@22056
   403
      in safe_exit state; State (History.init (undo_limit int) node, term) end
wenzelm@23911
   404
  | apply_tr int _ (InitEmpty f) (state as Toplevel _) =
wenzelm@23911
   405
      (safe_exit state; keep_state int (fn _ => fn _ => f ()) toplevel)
wenzelm@23363
   406
  | apply_tr _ _ Exit (State (node, term)) =
wenzelm@22056
   407
      (the_global_theory (History.current node); Toplevel (SOME (node, term)))
wenzelm@23363
   408
  | apply_tr _ _ UndoExit (Toplevel (SOME state_info)) = State state_info
wenzelm@23363
   409
  | apply_tr _ _ Kill (State (node, (_, kill))) =
wenzelm@22056
   410
      (kill (the_global_theory (History.current node)); toplevel)
wenzelm@23363
   411
  | apply_tr _ _ (History f) (State (node, term)) = State (f node, term)
wenzelm@23363
   412
  | apply_tr int _ (Keep f) state = keep_state int f state
wenzelm@23363
   413
  | apply_tr int pos (Transaction (hist, f)) (State state) =
wenzelm@23363
   414
      transaction hist pos (fn x => f int x) state
wenzelm@23363
   415
  | apply_tr _ _ _ _ = raise UNDEF;
wenzelm@5828
   416
wenzelm@23363
   417
fun apply_union _ _ [] state = raise FAILURE (state, UNDEF)
wenzelm@23363
   418
  | apply_union int pos (tr :: trs) state =
wenzelm@23363
   419
      apply_tr int pos tr state
wenzelm@23363
   420
        handle UNDEF => apply_union int pos trs state
wenzelm@23363
   421
          | FAILURE (alt_state, UNDEF) => apply_union int pos trs alt_state
wenzelm@6689
   422
          | exn as FAILURE _ => raise exn
wenzelm@6689
   423
          | exn => raise FAILURE (state, exn);
wenzelm@6689
   424
wenzelm@6689
   425
in
wenzelm@6689
   426
wenzelm@23363
   427
fun apply_trans int pos trs state = (apply_union int pos trs state, NONE)
skalberg@15531
   428
  handle FAILURE (alt_state, exn) => (alt_state, SOME exn) | exn => (state, SOME exn);
wenzelm@6689
   429
wenzelm@6689
   430
end;
wenzelm@5828
   431
wenzelm@5828
   432
wenzelm@5828
   433
(* datatype transition *)
wenzelm@5828
   434
wenzelm@5828
   435
datatype transition = Transition of
wenzelm@16815
   436
 {name: string,                        (*command name*)
wenzelm@16815
   437
  pos: Position.T,                     (*source position*)
wenzelm@16815
   438
  source: OuterLex.token list option,  (*source text*)
wenzelm@16815
   439
  int_only: bool,                      (*interactive-only*)
wenzelm@16815
   440
  print: string list,                  (*print modes (union)*)
wenzelm@16815
   441
  no_timing: bool,                     (*suppress timing*)
wenzelm@16815
   442
  trans: trans list};                  (*primitive transitions (union)*)
wenzelm@5828
   443
wenzelm@14923
   444
fun make_transition (name, pos, source, int_only, print, no_timing, trans) =
wenzelm@14923
   445
  Transition {name = name, pos = pos, source = source,
wenzelm@14923
   446
    int_only = int_only, print = print, no_timing = no_timing, trans = trans};
wenzelm@5828
   447
wenzelm@14923
   448
fun map_transition f (Transition {name, pos, source, int_only, print, no_timing, trans}) =
wenzelm@14923
   449
  make_transition (f (name, pos, source, int_only, print, no_timing, trans));
wenzelm@5828
   450
wenzelm@16607
   451
val empty = make_transition ("<unknown>", Position.none, NONE, false, [], false, []);
wenzelm@14923
   452
wenzelm@14923
   453
fun name_of (Transition {name, ...}) = name;
wenzelm@14923
   454
fun source_of (Transition {source, ...}) = source;
wenzelm@5828
   455
wenzelm@5828
   456
wenzelm@5828
   457
(* diagnostics *)
wenzelm@5828
   458
wenzelm@5828
   459
fun str_of_transition (Transition {name, pos, ...}) = quote name ^ Position.str_of pos;
wenzelm@5828
   460
wenzelm@5828
   461
fun command_msg msg tr = msg ^ "command " ^ str_of_transition tr;
wenzelm@5828
   462
fun at_command tr = command_msg "At " tr ^ ".";
wenzelm@5828
   463
wenzelm@5828
   464
fun type_error tr state =
wenzelm@18685
   465
  ERROR (command_msg "Illegal application of " tr ^ " " ^ str_of_state state);
wenzelm@5828
   466
wenzelm@5828
   467
wenzelm@5828
   468
(* modify transitions *)
wenzelm@5828
   469
wenzelm@14923
   470
fun name nm = map_transition (fn (_, pos, source, int_only, print, no_timing, trans) =>
wenzelm@14923
   471
  (nm, pos, source, int_only, print, no_timing, trans));
wenzelm@5828
   472
wenzelm@14923
   473
fun position pos = map_transition (fn (name, _, source, int_only, print, no_timing, trans) =>
wenzelm@14923
   474
  (name, pos, source, int_only, print, no_timing, trans));
wenzelm@9010
   475
wenzelm@14923
   476
fun source src = map_transition (fn (name, pos, _, int_only, print, no_timing, trans) =>
skalberg@15531
   477
  (name, pos, SOME src, int_only, print, no_timing, trans));
wenzelm@5828
   478
wenzelm@14923
   479
fun interactive int_only = map_transition (fn (name, pos, source, _, print, no_timing, trans) =>
wenzelm@14923
   480
  (name, pos, source, int_only, print, no_timing, trans));
wenzelm@14923
   481
wenzelm@17363
   482
val no_timing = map_transition (fn (name, pos, source, int_only, print, _, trans) =>
wenzelm@17363
   483
  (name, pos, source, int_only, print, true, trans));
wenzelm@17363
   484
wenzelm@17363
   485
fun add_trans tr = map_transition (fn (name, pos, source, int_only, print, no_timing, trans) =>
wenzelm@17363
   486
  (name, pos, source, int_only, print, no_timing, trans @ [tr]));
wenzelm@17363
   487
wenzelm@16607
   488
fun print' mode = map_transition (fn (name, pos, source, int_only, print, no_timing, trans) =>
wenzelm@16607
   489
  (name, pos, source, int_only, insert (op =) mode print, no_timing, trans));
wenzelm@16607
   490
wenzelm@16607
   491
val print = print' "";
wenzelm@5828
   492
wenzelm@17363
   493
val three_buffersN = "three_buffers";
wenzelm@17363
   494
val print3 = print' three_buffersN;
wenzelm@5828
   495
wenzelm@5828
   496
wenzelm@21007
   497
(* basic transitions *)
wenzelm@5828
   498
wenzelm@22056
   499
fun init_theory f exit kill = add_trans (Init (f, (exit, kill)));
wenzelm@21958
   500
val init_empty = add_trans o InitEmpty;
wenzelm@6689
   501
val exit = add_trans Exit;
wenzelm@21958
   502
val undo_exit = add_trans UndoExit;
wenzelm@6689
   503
val kill = add_trans Kill;
wenzelm@20128
   504
val history = add_trans o History;
wenzelm@7612
   505
val keep' = add_trans o Keep;
wenzelm@18592
   506
fun map_current f = add_trans (Transaction (false, f));
wenzelm@18592
   507
fun app_current f = add_trans (Transaction (true, f));
wenzelm@5828
   508
wenzelm@7612
   509
fun keep f = add_trans (Keep (fn _ => f));
wenzelm@5828
   510
fun imperative f = keep (fn _ => f ());
wenzelm@5828
   511
wenzelm@21007
   512
val unknown_theory = imperative (fn () => warning "Unknown theory context");
wenzelm@21007
   513
val unknown_proof = imperative (fn () => warning "Unknown proof context");
wenzelm@21007
   514
val unknown_context = imperative (fn () => warning "Unknown context");
wenzelm@15668
   515
wenzelm@21007
   516
wenzelm@21007
   517
(* theory transitions *)
wenzelm@15668
   518
wenzelm@20963
   519
fun theory' f = app_current (fn int =>
wenzelm@20963
   520
  (fn Theory (Context.Theory thy, _) => Theory (Context.Theory (f int thy), NONE)
wenzelm@20963
   521
    | _ => raise UNDEF));
wenzelm@20963
   522
wenzelm@20963
   523
fun theory f = theory' (K f);
wenzelm@20963
   524
wenzelm@21294
   525
fun begin_local_theory begin f = app_current (fn _ =>
wenzelm@20963
   526
  (fn Theory (Context.Theory thy, _) =>
wenzelm@20963
   527
        let
wenzelm@20985
   528
          val lthy = f thy;
wenzelm@21294
   529
          val gthy = if begin then Context.Proof lthy else Context.Theory (loc_exit lthy);
wenzelm@21294
   530
        in Theory (gthy, SOME lthy) end
wenzelm@20963
   531
    | _ => raise UNDEF));
wenzelm@17076
   532
wenzelm@21294
   533
val end_local_theory = app_current (fn _ =>
wenzelm@21294
   534
  (fn Theory (Context.Proof lthy, _) => Theory (Context.Theory (loc_exit lthy), SOME lthy)
wenzelm@21007
   535
    | _ => raise UNDEF));
wenzelm@21007
   536
wenzelm@21007
   537
local
wenzelm@21007
   538
wenzelm@20963
   539
fun local_theory_presentation loc f g = app_current (fn int =>
wenzelm@21294
   540
  (fn Theory (gthy, _) =>
wenzelm@21294
   541
        let
wenzelm@21294
   542
          val finish = loc_finish loc gthy;
wenzelm@21294
   543
          val lthy' = f (loc_begin loc gthy);
wenzelm@21294
   544
        in Theory (finish lthy', SOME lthy') end
wenzelm@20963
   545
    | _ => raise UNDEF) #> tap (g int));
wenzelm@15668
   546
wenzelm@21007
   547
in
wenzelm@21007
   548
wenzelm@20963
   549
fun local_theory loc f = local_theory_presentation loc f (K I);
wenzelm@20963
   550
fun present_local_theory loc g = local_theory_presentation loc I g;
wenzelm@18955
   551
wenzelm@21007
   552
end;
wenzelm@21007
   553
wenzelm@21007
   554
wenzelm@21007
   555
(* proof transitions *)
wenzelm@21007
   556
wenzelm@21007
   557
fun end_proof f = map_current (fn int =>
wenzelm@21007
   558
  (fn Proof (prf, (finish, orig_gthy)) =>
wenzelm@21007
   559
        let val state = ProofHistory.current prf in
wenzelm@21007
   560
          if can (Proof.assert_bottom true) state then
wenzelm@21007
   561
            let
wenzelm@21007
   562
              val ctxt' = f int state;
wenzelm@21007
   563
              val gthy' = finish ctxt';
wenzelm@21007
   564
            in Theory (gthy', SOME ctxt') end
wenzelm@21007
   565
          else raise UNDEF
wenzelm@21007
   566
        end
wenzelm@21007
   567
    | SkipProof (h, (gthy, _)) =>
wenzelm@21007
   568
        if History.current h = 0 then Theory (gthy, NONE) else raise UNDEF
wenzelm@21007
   569
    | _ => raise UNDEF));
wenzelm@21007
   570
wenzelm@21294
   571
local
wenzelm@21294
   572
wenzelm@21294
   573
fun begin_proof init finish = app_current (fn int =>
wenzelm@21294
   574
  (fn Theory (gthy, _) =>
wenzelm@21294
   575
    let
wenzelm@21294
   576
      val prf = init gthy;
wenzelm@21294
   577
      val schematic = Proof.schematic_goal prf;
wenzelm@21294
   578
    in
wenzelm@21294
   579
      if ! skip_proofs andalso schematic then
wenzelm@21294
   580
        warning "Cannot skip proof of schematic goal statement"
wenzelm@21294
   581
      else ();
wenzelm@21294
   582
      if ! skip_proofs andalso not schematic then
wenzelm@21294
   583
        SkipProof
wenzelm@21294
   584
          (History.init (undo_limit int) 0, (finish gthy (Proof.global_skip_proof int prf), gthy))
wenzelm@21294
   585
      else Proof (ProofHistory.init (undo_limit int) prf, (finish gthy, gthy))
wenzelm@21294
   586
    end
wenzelm@21294
   587
  | _ => raise UNDEF));
wenzelm@21294
   588
wenzelm@21294
   589
in
wenzelm@21294
   590
wenzelm@21294
   591
fun local_theory_to_proof loc f = begin_proof (f o loc_begin loc) (loc_finish loc);
wenzelm@21294
   592
wenzelm@21294
   593
fun theory_to_proof f = begin_proof
wenzelm@21294
   594
    (fn Context.Theory thy => f thy | _ => raise UNDEF)
wenzelm@21294
   595
    (K (Context.Theory o ProofContext.theory_of));
wenzelm@21294
   596
wenzelm@21294
   597
end;
wenzelm@21294
   598
wenzelm@21007
   599
val forget_proof = map_current (fn _ =>
wenzelm@21007
   600
  (fn Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@21007
   601
    | SkipProof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE)
wenzelm@21007
   602
    | _ => raise UNDEF));
wenzelm@21007
   603
wenzelm@21177
   604
fun present_proof f = map_current (fn int =>
wenzelm@21177
   605
  (fn Proof (prf, x) => Proof (ProofHistory.apply I prf, x)
wenzelm@21177
   606
    | SkipProof (h, x) => SkipProof (History.apply I h, x)
wenzelm@21177
   607
    | _ => raise UNDEF) #> tap (f int));
wenzelm@21177
   608
wenzelm@17904
   609
fun proofs' f = map_current (fn int =>
wenzelm@21007
   610
  (fn Proof (prf, x) => Proof (ProofHistory.applys (f int) prf, x)
wenzelm@21007
   611
    | SkipProof (h, x) => SkipProof (History.apply I h, x)
wenzelm@16815
   612
    | _ => raise UNDEF));
wenzelm@15668
   613
wenzelm@17904
   614
fun proof' f = proofs' (Seq.single oo f);
wenzelm@17904
   615
val proofs = proofs' o K;
wenzelm@6689
   616
val proof = proof' o K;
wenzelm@16815
   617
wenzelm@16815
   618
fun actual_proof f = map_current (fn _ =>
wenzelm@21007
   619
  (fn Proof (prf, x) => Proof (f prf, x)
wenzelm@20963
   620
    | _ => raise UNDEF));
wenzelm@16815
   621
wenzelm@16815
   622
fun skip_proof f = map_current (fn _ =>
wenzelm@21007
   623
  (fn SkipProof (h, x) => SkipProof (f h, x)
wenzelm@18563
   624
    | _ => raise UNDEF));
wenzelm@18563
   625
wenzelm@16815
   626
fun skip_proof_to_theory p = map_current (fn _ =>
wenzelm@21007
   627
  (fn SkipProof (h, (gthy, _)) =>
wenzelm@21007
   628
    if p (History.current h) then Theory (gthy, NONE)
wenzelm@17904
   629
    else raise UNDEF
wenzelm@17904
   630
  | _ => raise UNDEF));
wenzelm@5828
   631
wenzelm@5828
   632
wenzelm@5828
   633
wenzelm@5828
   634
(** toplevel transactions **)
wenzelm@5828
   635
wenzelm@5828
   636
(* apply transitions *)
wenzelm@5828
   637
wenzelm@6664
   638
local
wenzelm@6664
   639
wenzelm@23363
   640
fun app int (tr as Transition {trans, pos, int_only, print, no_timing, ...}) state =
wenzelm@5828
   641
  let
wenzelm@21962
   642
    val _ =
wenzelm@21962
   643
      if not int andalso int_only then warning (command_msg "Interactive-only " tr)
wenzelm@21962
   644
      else ();
wenzelm@16682
   645
wenzelm@22588
   646
    fun do_timing f x = (warning (command_msg "" tr); timeap f x);
wenzelm@16682
   647
    fun do_profiling f x = profile (! profiling) f x;
wenzelm@16682
   648
wenzelm@6689
   649
    val (result, opt_exn) =
wenzelm@23363
   650
       state |> (apply_trans int pos trans
wenzelm@23428
   651
        |> (if ! profiling > 0 andalso not no_timing then do_profiling else I)
wenzelm@16729
   652
        |> (if ! profiling > 0 orelse ! timing andalso not no_timing then do_timing else I));
wenzelm@21962
   653
    val _ =
wenzelm@21962
   654
      if int andalso not (! quiet) andalso exists (member (op =) print) ("" :: ! print_mode)
wenzelm@21962
   655
      then print_state false result else ();
skalberg@15570
   656
  in (result, Option.map (fn UNDEF => type_error tr state | exn => exn) opt_exn) end;
wenzelm@6664
   657
wenzelm@6664
   658
in
wenzelm@5828
   659
wenzelm@6689
   660
fun apply int tr st =
wenzelm@6965
   661
  (case app int tr st of
skalberg@15531
   662
    (_, SOME TERMINATE) => NONE
skalberg@15531
   663
  | (_, SOME RESTART) => SOME (toplevel, NONE)
skalberg@15531
   664
  | (state', SOME (EXCURSION_FAIL exn_info)) => SOME (state', SOME exn_info)
skalberg@15531
   665
  | (state', SOME exn) => SOME (state', SOME (exn, at_command tr))
skalberg@15531
   666
  | (state', NONE) => SOME (state', NONE));
wenzelm@6664
   667
wenzelm@6664
   668
end;
wenzelm@5828
   669
wenzelm@5828
   670
wenzelm@17076
   671
(* excursion: toplevel -- apply transformers/presentation -- toplevel *)
wenzelm@5828
   672
wenzelm@6664
   673
local
wenzelm@6664
   674
wenzelm@5828
   675
fun excur [] x = x
wenzelm@17076
   676
  | excur ((tr, pr) :: trs) (st, res) =
wenzelm@17321
   677
      (case apply (! interact) tr st of
skalberg@15531
   678
        SOME (st', NONE) =>
wenzelm@18685
   679
          excur trs (st', pr st st' res handle exn =>
wenzelm@10324
   680
            raise EXCURSION_FAIL (exn, "Presentation failed\n" ^ at_command tr))
skalberg@15531
   681
      | SOME (st', SOME exn_info) => raise EXCURSION_FAIL exn_info
skalberg@15531
   682
      | NONE => raise EXCURSION_FAIL (TERMINATE, at_command tr));
wenzelm@5828
   683
wenzelm@17076
   684
fun no_pr _ _ _ = ();
wenzelm@17076
   685
wenzelm@6664
   686
in
wenzelm@6664
   687
wenzelm@17076
   688
fun present_excursion trs res =
wenzelm@21958
   689
  (case excur trs (toplevel, res) of
wenzelm@22056
   690
    (state as Toplevel _, res') => (safe_exit state; res')
wenzelm@18685
   691
  | _ => error "Unfinished development at end of input")
wenzelm@9134
   692
  handle exn => error (exn_message exn);
wenzelm@9134
   693
wenzelm@17076
   694
fun excursion trs = present_excursion (map (rpair no_pr) trs) ();
wenzelm@7062
   695
wenzelm@6664
   696
end;
wenzelm@6664
   697
wenzelm@5828
   698
wenzelm@5828
   699
wenzelm@5828
   700
(** interactive transformations **)
wenzelm@5828
   701
wenzelm@5828
   702
(* the global state reference *)
wenzelm@5828
   703
skalberg@15531
   704
val global_state = ref (toplevel, NONE: (exn * string) option);
wenzelm@5828
   705
skalberg@15531
   706
fun set_state state = global_state := (state, NONE);
wenzelm@5828
   707
fun get_state () = fst (! global_state);
wenzelm@5828
   708
fun exn () = snd (! global_state);
wenzelm@5828
   709
wenzelm@5828
   710
wenzelm@5828
   711
(* apply transformers to global state *)
wenzelm@5828
   712
wenzelm@14985
   713
nonfix >> >>>;
wenzelm@5828
   714
wenzelm@23940
   715
fun >> tr = CRITICAL (fn () =>
wenzelm@5828
   716
  (case apply true tr (get_state ()) of
skalberg@15531
   717
    NONE => false
skalberg@15531
   718
  | SOME (state', exn_info) =>
wenzelm@5828
   719
      (global_state := (state', exn_info);
wenzelm@22014
   720
        print_exn exn_info;
wenzelm@23940
   721
        true)));
wenzelm@5828
   722
wenzelm@14985
   723
fun >>> [] = ()
wenzelm@14985
   724
  | >>> (tr :: trs) = if >> tr then >>> trs else ();
wenzelm@14985
   725
wenzelm@21958
   726
fun init_state () = (>> (init_empty (K ()) empty); ());
wenzelm@21958
   727
wenzelm@21958
   728
wenzelm@21958
   729
(* the Isar source of transitions *)
wenzelm@21958
   730
wenzelm@21958
   731
type 'a isar =
wenzelm@21958
   732
  (transition, (transition option,
wenzelm@21958
   733
    (OuterLex.token, (OuterLex.token option, (OuterLex.token, (OuterLex.token,
wenzelm@21958
   734
      Position.T * (Symbol.symbol, (string, 'a) Source.source) Source.source)
wenzelm@21958
   735
          Source.source) Source.source) Source.source) Source.source) Source.source) Source.source;
wenzelm@21958
   736
wenzelm@17513
   737
(*Spurious interrupts ahead!  Race condition?*)
wenzelm@17513
   738
fun get_interrupt src = SOME (Source.get_single src) handle Interrupt => NONE;
wenzelm@7602
   739
wenzelm@20928
   740
fun warn_secure () =
wenzelm@20928
   741
  let val secure = Secure.is_secure ()
wenzelm@20928
   742
  in if secure then warning "Cannot exit to ML in secure mode" else (); secure end;
wenzelm@20928
   743
wenzelm@5828
   744
fun raw_loop src =
wenzelm@23720
   745
  let val prompt = Output.escape (Markup.enclose Markup.prompt Source.default_prompt) in
wenzelm@23640
   746
    (case get_interrupt (Source.set_prompt prompt src) of
wenzelm@23640
   747
      NONE => (writeln "\nInterrupt."; raw_loop src)
wenzelm@23640
   748
    | SOME NONE => if warn_secure () then quit () else ()
wenzelm@23640
   749
    | SOME (SOME (tr, src')) =>
wenzelm@23640
   750
        if >> tr orelse warn_secure () then raw_loop src'
wenzelm@23640
   751
        else ())
wenzelm@23640
   752
  end;
wenzelm@5828
   753
wenzelm@12987
   754
fun loop src = ignore_interrupt raw_loop src;
wenzelm@5828
   755
wenzelm@5828
   756
end;