src/Pure/Isar/toplevel.ML
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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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    License:    GPL (GNU GENERAL PUBLIC LICENSE)
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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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  datatype node = Theory of theory | Proof of ProofHistory.T
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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 prompt_state_default: state -> string
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  val prompt_state_fn: (state -> string) ref
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  val print_state_context: state -> unit
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  val print_state_default: bool -> state -> unit
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  val print_state_fn: (bool -> state -> unit) ref
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  val print_state: bool -> state -> unit
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  val pretty_state: bool -> state -> Pretty.T list
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  exception UNDEF
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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: (theory -> 'a) -> (Proof.state -> 'a) -> state -> 'a
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  val theory_of: state -> theory
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  val sign_of: state -> Sign.sg
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  val context_of: state -> Proof.context
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  val proof_of: state -> Proof.state
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  val enter_forward_proof: state -> Proof.state
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  type transition
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  exception TERMINATE
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  exception RESTART
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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 no_timing: transition -> transition
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  val reset: transition -> transition
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  val init: (bool -> node) -> (node -> unit) -> (node -> unit) -> transition -> transition
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  val exit: transition -> transition
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  val kill: 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 history: (node History.T -> node History.T) -> transition -> transition
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  val imperative: (unit -> unit) -> 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 theory: (theory -> theory) -> transition -> transition
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  val theory': (bool -> theory -> theory) -> transition -> transition
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  val theory_to_proof: (bool -> theory -> ProofHistory.T) -> transition -> transition
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  val proof: (ProofHistory.T -> ProofHistory.T) -> transition -> transition
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  val proof': (bool -> ProofHistory.T -> ProofHistory.T) -> transition -> transition
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  val proof_to_theory: (ProofHistory.T -> theory) -> transition -> transition
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  val proof_to_theory': (bool -> ProofHistory.T -> theory) -> 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 quiet: bool ref
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  val exn_message: exn -> string
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  val apply: bool -> transition -> state -> (state * (exn * string) option) option
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  val excursion_result: ((transition * (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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  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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(* datatype node *)
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datatype node =
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  Theory of theory |
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  Proof of ProofHistory.T;
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fun str_of_node (Theory _) = "in theory mode"
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  | str_of_node (Proof _) = "in proof mode";
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fun pretty_context thy = [Pretty.block
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  [Pretty.str "theory", Pretty.brk 1, Pretty.str (PureThy.get_name thy),
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    Pretty.str " =", Pretty.brk 1, Display.pretty_theory thy]];
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fun pretty_prf prf = Proof.pretty_state (ProofHistory.position prf) (ProofHistory.current prf);
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fun pretty_node_context (Theory thy) = pretty_context thy
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  | pretty_node_context (Proof prf) = pretty_context (Proof.theory_of (ProofHistory.current prf));
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fun pretty_node prf_only (Theory thy) = if prf_only then [] else pretty_context thy
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  | pretty_node _ (Proof prf) = pretty_prf prf;
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(* datatype state *)
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datatype state = State of (node History.T * ((node -> unit) * (node -> unit))) option;
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val toplevel = State None;
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fun is_toplevel (State None) = true
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  | is_toplevel _ = false;
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fun str_of_state (State None) = "at top level"
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  | str_of_state (State (Some (node, _))) = str_of_node (History.current node);
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(* prompt_state hook *)
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fun prompt_state_default (State _) = Source.default_prompt;
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val prompt_state_fn = ref prompt_state_default;
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fun prompt_state state = ! prompt_state_fn state;
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(* print state *)
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fun pretty_current_node _ (State None) = []
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  | pretty_current_node prt (State (Some (node, _))) = prt (History.current node);
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val print_state_context =
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  Pretty.writeln o Pretty.chunks o pretty_current_node pretty_node_context;
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fun pretty_state prf_only state =
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  let val ref (begin_state, end_state, _) = Display.current_goals_markers in
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    (case pretty_current_node (pretty_node prf_only) state of [] => []
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    | prts =>
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        (if begin_state = "" then [] else [Pretty.str begin_state]) @ prts @
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        (if end_state = "" then [] else [Pretty.str end_state]))
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  end;
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fun print_state_default prf_only state = Pretty.writelns (pretty_state prf_only state);
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val print_state_fn = ref print_state_default;
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fun print_state state = ! print_state_fn state;
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(* top node *)
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exception UNDEF;
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fun node_history_of (State None) = raise UNDEF
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  | node_history_of (State (Some (node, _))) = node;
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val node_of = History.current o node_history_of;
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fun node_case f g state =
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  (case node_of state of
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    Theory thy => f thy
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  | Proof prf => g (ProofHistory.current prf));
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val theory_of = node_case I Proof.theory_of;
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val context_of = node_case ProofContext.init Proof.context_of;
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val sign_of = Theory.sign_of o theory_of;
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val proof_of = node_case (fn _ => raise UNDEF) I;
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val enter_forward_proof = node_case Proof.init_state Proof.enter_forward;
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(** toplevel transitions **)
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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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(* recovery from stale signatures *)
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(*note: proof commands should be non-destructive!*)
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local
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fun is_stale state = Sign.is_stale (sign_of state) handle UNDEF => false;
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fun checkpoint_node true (Theory thy) = Theory (PureThy.checkpoint thy)
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  | checkpoint_node _ node = node;
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fun copy_node true (Theory thy) = Theory (Theory.copy thy)
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  | copy_node _ node = node;
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fun interruptible f x =
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  let val y = ref (None: node History.T option);
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  in raise_interrupt (fn () => y := Some (f x)) (); the (! y) end;
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val rollback = ERROR_MESSAGE "Stale signature encountered after succesful execution!";
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fun return (result, None) = result
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  | return (result, Some exn) = raise FAILURE (result, exn);
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in
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fun node_trans _ _ _ (State None) = raise UNDEF
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  | node_trans int hist f (State (Some (node, term))) =
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      let
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        fun mk_state nd = State (Some (nd, term));
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        val cont_node = History.map (checkpoint_node int) node;
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        val back_node = History.map (copy_node int) cont_node;
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        val trans = if hist then History.apply_copy (copy_node int) else History.map;
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        val (result, opt_exn) =
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          (mk_state (transform_error (interruptible (trans (f int))) cont_node), None)
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            handle exn => (mk_state cont_node, Some exn);
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      in
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        if is_stale result then return (mk_state back_node, Some (if_none opt_exn rollback))
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        else return (result, opt_exn)
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      end;
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fun check_stale state =
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  if not (is_stale state) then ()
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  else warning "Stale signature encountered!  Should restart current theory.";
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end;
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(* primitive transitions *)
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(*Important note: recovery from stale signatures is provided only for
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  theory-level operations via MapCurrent and AppCurrent.  Other node
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  or state operations should not touch signatures at all.
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  Also note that interrupts are enabled for Keep, MapCurrent, and
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  AppCurrent only.*)
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datatype trans =
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  Reset |                                       (*empty toplevel*)
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  Init of (bool -> node) * ((node -> unit) * (node -> unit)) |
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    (*init node; provide exit/kill operation*)
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  Exit |                                        (*conclude node*)
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  Kill |                                        (*abort node*)
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  Keep of bool -> state -> unit |               (*peek at state*)
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  History of node History.T -> node History.T | (*history operation (undo etc.)*)
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  MapCurrent of bool -> node -> node |          (*change node, bypassing history*)
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  AppCurrent of bool -> node -> node;           (*change node, recording history*)
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fun undo_limit int = if int then None else Some 0;
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local
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fun apply_tr _ Reset _ = toplevel
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  | apply_tr int (Init (f, term)) (State None) =
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      State (Some (History.init (undo_limit int) (f int), term))
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  | apply_tr _ (Init _ ) (State (Some _)) = raise UNDEF
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  | apply_tr _ Exit (State None) = raise UNDEF
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  | apply_tr _ Exit (State (Some (node, (exit, _)))) =
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      (exit (History.current node); State None)
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  | apply_tr _ Kill (State None) = raise UNDEF
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  | apply_tr _ Kill (State (Some (node, (_, kill)))) =
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      (kill (History.current node); State None)
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  | apply_tr int (Keep f) state = (raise_interrupt (f int) state; state)
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  | apply_tr _ (History _) (State None) = raise UNDEF
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  | apply_tr _ (History f) (State (Some (node, term))) = State (Some (f node, term))
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  | apply_tr int (MapCurrent f) state = node_trans int false f state
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  | apply_tr int (AppCurrent f) state = node_trans int true f state;
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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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      transform_error (apply_tr int tr) state
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        handle UNDEF => apply_union int trs state
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          | FAILURE (alt_state, UNDEF) => apply_union int trs alt_state
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          | exn as FAILURE _ => raise exn
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          | exn => raise FAILURE (state, exn);
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in
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fun apply_trans int trs state = (apply_union int trs state, None)
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  handle FAILURE (alt_state, exn) => (alt_state, Some exn) | exn => (state, Some exn);
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end;
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(* datatype transition *)
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datatype transition = Transition of
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 {name: string,
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  pos: Position.T,
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  source: OuterLex.token list option,
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  int_only: bool,
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  print: bool,
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  no_timing: bool,
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  trans: trans list};
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fun make_transition (name, pos, source, int_only, print, no_timing, trans) =
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  Transition {name = name, pos = pos, source = source,
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    int_only = int_only, print = print, no_timing = no_timing, trans = trans};
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fun map_transition f (Transition {name, pos, source, int_only, print, no_timing, trans}) =
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  make_transition (f (name, pos, source, int_only, print, no_timing, trans));
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val empty = make_transition ("<unknown>", Position.none, None, false, false, false, []);
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fun name_of (Transition {name, ...}) = name;
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fun source_of (Transition {source, ...}) = source;
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(* diagnostics *)
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fun str_of_transition (Transition {name, pos, ...}) = quote name ^ Position.str_of pos;
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fun command_msg msg tr = msg ^ "command " ^ str_of_transition tr;
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fun at_command tr = command_msg "At " tr ^ ".";
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fun type_error tr state =
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  ERROR_MESSAGE (command_msg "Illegal application of " tr ^ " " ^ str_of_state state);
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(* modify transitions *)
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fun name nm = map_transition (fn (_, pos, source, int_only, print, no_timing, trans) =>
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  (nm, pos, source, int_only, print, no_timing, trans));
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fun position pos = map_transition (fn (name, _, source, int_only, print, no_timing, trans) =>
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  (name, pos, source, int_only, print, no_timing, trans));
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fun source src = map_transition (fn (name, pos, _, int_only, print, no_timing, trans) =>
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  (name, pos, Some src, int_only, print, no_timing, trans));
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fun interactive int_only = map_transition (fn (name, pos, source, _, print, no_timing, trans) =>
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  (name, pos, source, int_only, print, no_timing, trans));
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val print = map_transition (fn (name, pos, source, int_only, _, no_timing, trans) =>
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  (name, pos, source, int_only, true, no_timing, trans));
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val no_timing = map_transition (fn (name, pos, source, int_only, print, _, trans) =>
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  (name, pos, source, int_only, print, true, trans));
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fun add_trans tr = map_transition (fn (name, pos, source, int_only, print, no_timing, trans) =>
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  (name, pos, source, int_only, print, no_timing, trans @ [tr]));
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(* build transitions *)
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val reset = add_trans Reset;
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fun init f exit kill = add_trans (Init (f, (exit, kill)));
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val exit = add_trans Exit;
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val kill = add_trans Kill;
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   347
val keep' = add_trans o Keep;
6689
wenzelm
parents: 6664
diff changeset
   348
val history = add_trans o History;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   349
val map_current = add_trans o MapCurrent;
6689
wenzelm
parents: 6664
diff changeset
   350
val app_current = add_trans o AppCurrent;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   351
7612
ba11b5db431a added keep', theory';
wenzelm
parents: 7602
diff changeset
   352
fun keep f = add_trans (Keep (fn _ => f));
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   353
fun imperative f = keep (fn _ => f ());
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   354
6689
wenzelm
parents: 6664
diff changeset
   355
fun init_theory f exit kill =
8465
df6549f5a01f eliminated toplevel stack;
wenzelm
parents: 7732
diff changeset
   356
  init (fn int => Theory (f int))
6689
wenzelm
parents: 6664
diff changeset
   357
    (fn Theory thy => exit thy | _ => raise UNDEF)
wenzelm
parents: 6664
diff changeset
   358
    (fn Theory thy => kill thy | _ => raise UNDEF);
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   359
6689
wenzelm
parents: 6664
diff changeset
   360
fun theory f = app_current (fn _ => (fn Theory thy => Theory (f thy) | _ => raise UNDEF));
7612
ba11b5db431a added keep', theory';
wenzelm
parents: 7602
diff changeset
   361
fun theory' f = app_current (fn int => (fn Theory thy => Theory (f int thy) | _ => raise UNDEF));
6689
wenzelm
parents: 6664
diff changeset
   362
fun theory_to_proof f =
wenzelm
parents: 6664
diff changeset
   363
  app_current (fn int => (fn Theory thy => Proof (f int thy) | _ => raise UNDEF));
wenzelm
parents: 6664
diff changeset
   364
fun proof' f = map_current (fn int => (fn Proof prf => Proof (f int prf) | _ => raise UNDEF));
wenzelm
parents: 6664
diff changeset
   365
val proof = proof' o K;
12315
edeb1bbcd479 added proof_to_theory';
wenzelm
parents: 12049
diff changeset
   366
fun proof_to_theory' f =
edeb1bbcd479 added proof_to_theory';
wenzelm
parents: 12049
diff changeset
   367
  map_current (fn int => (fn Proof prf => Theory (f int prf) | _ => raise UNDEF));
edeb1bbcd479 added proof_to_theory';
wenzelm
parents: 12049
diff changeset
   368
val proof_to_theory = proof_to_theory' o K;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   369
9512
c30f6d0f81d2 added unknown_theory/proof/context;
wenzelm
parents: 9453
diff changeset
   370
val unknown_theory = imperative (fn () => warning "Unknown theory context");
c30f6d0f81d2 added unknown_theory/proof/context;
wenzelm
parents: 9453
diff changeset
   371
val unknown_proof = imperative (fn () => warning "Unknown proof context");
c30f6d0f81d2 added unknown_theory/proof/context;
wenzelm
parents: 9453
diff changeset
   372
val unknown_context = imperative (fn () => warning "Unknown context");
c30f6d0f81d2 added unknown_theory/proof/context;
wenzelm
parents: 9453
diff changeset
   373
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   374
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   375
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   376
(** toplevel transactions **)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   377
7198
680d43e41b0d tuned print_state;
wenzelm
parents: 7105
diff changeset
   378
val quiet = ref false;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   379
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   380
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   381
(* print exceptions *)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   382
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   383
fun raised name = "exception " ^ name ^ " raised";
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   384
fun raised_msg name msg = raised name ^ ": " ^ msg;
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   385
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   386
fun exn_message TERMINATE = "Exit."
5990
8b6de9bd7d72 added exception RESTART;
wenzelm
parents: 5946
diff changeset
   387
  | exn_message RESTART = "Restart."
7022
abf9d5e2fb6e removed BREAK, ROLLBACK;
wenzelm
parents: 6971
diff changeset
   388
  | exn_message (EXCURSION_FAIL (exn, msg)) = cat_lines [exn_message exn, msg]
6971
4a13e098ee86 tuned Interrupt msgs;
wenzelm
parents: 6965
diff changeset
   389
  | exn_message Interrupt = "Interrupt."
6002
c1f28f8ec72c excursion: ERROR_MESSAGE;
wenzelm
parents: 5990
diff changeset
   390
  | exn_message ERROR = "ERROR."
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   391
  | exn_message (ERROR_MESSAGE msg) = msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   392
  | exn_message (THEORY (msg, _)) = msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   393
  | exn_message (ProofContext.CONTEXT (msg, _)) = msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   394
  | exn_message (Proof.STATE (msg, _)) = msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   395
  | exn_message (ProofHistory.FAIL msg) = msg
13486
54464ea94d6f exception SIMPROC_FAIL: solid error reporting of simprocs;
wenzelm
parents: 12987
diff changeset
   396
  | exn_message (MetaSimplifier.SIMPROC_FAIL (name, exn)) =
54464ea94d6f exception SIMPROC_FAIL: solid error reporting of simprocs;
wenzelm
parents: 12987
diff changeset
   397
      fail_message "simproc" ((name, Position.none), exn)
5920
d7e35f45b72c BREAK: include state;
wenzelm
parents: 5828
diff changeset
   398
  | exn_message (Attrib.ATTRIB_FAIL info) = fail_message "attribute" info
d7e35f45b72c BREAK: include state;
wenzelm
parents: 5828
diff changeset
   399
  | exn_message (Method.METHOD_FAIL info) = fail_message "method" info
12881
eeb36b66480e ANTIQUOTE_FAIL;
wenzelm
parents: 12423
diff changeset
   400
  | exn_message (Antiquote.ANTIQUOTE_FAIL info) = fail_message "antiquotation" info
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   401
  | exn_message (Syntax.AST (msg, _)) = raised_msg "AST" msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   402
  | exn_message (TYPE (msg, _, _)) = raised_msg "TYPE" msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   403
  | exn_message (TERM (msg, _)) = raised_msg "TERM" msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   404
  | exn_message (THM (msg, _, _)) = raised_msg "THM" msg
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   405
  | exn_message Library.OPTION = raised "Library.OPTION"
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   406
  | exn_message (Library.LIST msg) = raised_msg "Library.LIST" msg
5920
d7e35f45b72c BREAK: include state;
wenzelm
parents: 5828
diff changeset
   407
  | exn_message exn = General.exnMessage exn
d7e35f45b72c BREAK: include state;
wenzelm
parents: 5828
diff changeset
   408
and fail_message kind ((name, pos), exn) =
9152
034cb4ac78b8 tuned msg;
wenzelm
parents: 9134
diff changeset
   409
  "Error in " ^ kind ^ " " ^ quote name ^ Position.str_of pos ^ ":\n" ^ exn_message exn;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   410
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   411
fun print_exn None = ()
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   412
  | print_exn (Some (exn, s)) = error_msg (cat_lines [exn_message exn, s]);
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   413
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   414
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   415
(* apply transitions *)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   416
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   417
local
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   418
9010
ce78dc5e1a73 Toplevel.no_timing;
wenzelm
parents: 8999
diff changeset
   419
fun app int (tr as Transition {trans, int_only, print, no_timing, ...}) state =
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   420
  let
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   421
    val _ =
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   422
      if int orelse not int_only then ()
8722
f745b34dcde3 tuned msg;
wenzelm
parents: 8561
diff changeset
   423
      else warning (command_msg "Interactive-only " tr);
6689
wenzelm
parents: 6664
diff changeset
   424
    val (result, opt_exn) =
14825
8cdf5a813cec Output.timing;
wenzelm
parents: 14091
diff changeset
   425
      (if ! Output.timing andalso not no_timing then (warning (command_msg "" tr); timeap) else I)
9010
ce78dc5e1a73 Toplevel.no_timing;
wenzelm
parents: 8999
diff changeset
   426
        (apply_trans int trans) state;
8886
111476895bf2 print_state: flag for proof only;
wenzelm
parents: 8807
diff changeset
   427
    val _ = if int andalso print andalso not (! quiet) then print_state false result else ();
6689
wenzelm
parents: 6664
diff changeset
   428
  in (result, apsome (fn UNDEF => type_error tr state | exn => exn) opt_exn) end;
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   429
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   430
in
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   431
6689
wenzelm
parents: 6664
diff changeset
   432
fun apply int tr st =
6965
a766de752996 fixed interrupts (eliminated races);
wenzelm
parents: 6689
diff changeset
   433
  (case app int tr st of
6689
wenzelm
parents: 6664
diff changeset
   434
    (_, Some TERMINATE) => None
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   435
  | (_, Some RESTART) => Some (toplevel, None)
7022
abf9d5e2fb6e removed BREAK, ROLLBACK;
wenzelm
parents: 6971
diff changeset
   436
  | (state', Some (EXCURSION_FAIL exn_info)) => Some (state', Some exn_info)
6689
wenzelm
parents: 6664
diff changeset
   437
  | (state', Some exn) => Some (state', Some (exn, at_command tr))
wenzelm
parents: 6664
diff changeset
   438
  | (state', None) => Some (state', None));
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   439
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   440
end;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   441
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   442
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   443
(* excursion: toplevel -- apply transformers -- toplevel *)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   444
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   445
local
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   446
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   447
fun excur [] x = x
9134
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   448
  | excur ((tr, f) :: trs) (st, res) =
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   449
      (case apply false tr st of
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   450
        Some (st', None) =>
9154
e71460b18988 excursion_result: transform_error;
wenzelm
parents: 9152
diff changeset
   451
          excur trs (st', transform_error (fn () => f st' res) () handle exn =>
10324
498999fd7c37 tuned msg;
wenzelm
parents: 9512
diff changeset
   452
            raise EXCURSION_FAIL (exn, "Presentation failed\n" ^ at_command tr))
9134
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   453
      | Some (st', Some exn_info) => raise EXCURSION_FAIL exn_info
7022
abf9d5e2fb6e removed BREAK, ROLLBACK;
wenzelm
parents: 6971
diff changeset
   454
      | None => raise EXCURSION_FAIL (TERMINATE, at_command tr));
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   455
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   456
in
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   457
9134
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   458
fun excursion_result (trs, res) =
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   459
  (case excur trs (State None, res) of
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   460
    (State None, res') => res'
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   461
  | _ => raise ERROR_MESSAGE "Unfinished development at end of input")
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   462
  handle exn => error (exn_message exn);
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   463
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   464
fun excursion trs =
9134
b38e94631f19 excursion_result;
wenzelm
parents: 9010
diff changeset
   465
  excursion_result (map (fn tr => (tr, fn _ => fn _ => ())) trs, ());
7062
e992884b256d Toplevel.excursion_error;
wenzelm
parents: 7022
diff changeset
   466
6664
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   467
end;
f679ddd1ddd8 cleaned comments;
wenzelm
parents: 6244
diff changeset
   468
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   469
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   470
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   471
(** interactive transformations **)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   472
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   473
(* the global state reference *)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   474
6689
wenzelm
parents: 6664
diff changeset
   475
val global_state = ref (toplevel, None: (exn * string) option);
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   476
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   477
fun set_state state = global_state := (state, None);
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   478
fun get_state () = fst (! global_state);
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   479
fun exn () = snd (! global_state);
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   480
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   481
6965
a766de752996 fixed interrupts (eliminated races);
wenzelm
parents: 6689
diff changeset
   482
(* the Isar source of transitions *)
a766de752996 fixed interrupts (eliminated races);
wenzelm
parents: 6689
diff changeset
   483
14091
ad6ba9c55190 A patch by david aspinall
nipkow
parents: 13486
diff changeset
   484
type 'a isar =
6965
a766de752996 fixed interrupts (eliminated races);
wenzelm
parents: 6689
diff changeset
   485
  (transition, (transition option,
12881
eeb36b66480e ANTIQUOTE_FAIL;
wenzelm
parents: 12423
diff changeset
   486
    (OuterLex.token, (OuterLex.token option, (OuterLex.token, (OuterLex.token,
14091
ad6ba9c55190 A patch by david aspinall
nipkow
parents: 13486
diff changeset
   487
      Position.T * (Symbol.symbol, (string, 'a) Source.source) Source.source)
12881
eeb36b66480e ANTIQUOTE_FAIL;
wenzelm
parents: 12423
diff changeset
   488
          Source.source) Source.source) Source.source) Source.source) Source.source) Source.source;
6965
a766de752996 fixed interrupts (eliminated races);
wenzelm
parents: 6689
diff changeset
   489
a766de752996 fixed interrupts (eliminated races);
wenzelm
parents: 6689
diff changeset
   490
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   491
(* apply transformers to global state *)
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   492
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   493
nonfix >>;
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   494
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   495
fun >> tr =
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   496
  (case apply true tr (get_state ()) of
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   497
    None => false
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   498
  | Some (state', exn_info) =>
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   499
      (global_state := (state', exn_info);
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   500
        check_stale state'; print_exn exn_info;
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   501
        true));
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   502
7602
2c0f407f80ce avoid interrupts of read loop;
wenzelm
parents: 7501
diff changeset
   503
(*Note: this is for Poly/ML only, we really do not intend to exhibit
2c0f407f80ce avoid interrupts of read loop;
wenzelm
parents: 7501
diff changeset
   504
  interrupts here*)
2c0f407f80ce avoid interrupts of read loop;
wenzelm
parents: 7501
diff changeset
   505
fun get_interrupt src = Some (Source.get_single src) handle Interrupt => None;
2c0f407f80ce avoid interrupts of read loop;
wenzelm
parents: 7501
diff changeset
   506
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   507
fun raw_loop src =
7602
2c0f407f80ce avoid interrupts of read loop;
wenzelm
parents: 7501
diff changeset
   508
  (case get_interrupt (Source.set_prompt (prompt_state (get_state ())) src) of
6971
4a13e098ee86 tuned Interrupt msgs;
wenzelm
parents: 6965
diff changeset
   509
    None => (writeln "\nInterrupt."; raw_loop src)
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   510
  | Some None => ()
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   511
  | Some (Some (tr, src')) => if >> tr then raw_loop src' else ());
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   512
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   513
12987
b6db96775e52 use ignore_interrupt, raise_interrupt;
wenzelm
parents: 12881
diff changeset
   514
fun loop src = ignore_interrupt raw_loop src;
5828
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   515
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   516
1feeadaad6a9 The Isabelle/Isar toplevel.
wenzelm
parents:
diff changeset
   517
end;