author | wenzelm |
Mon, 14 Jul 2008 11:19:41 +0200 | |
changeset 27564 | fc6d34e49e17 |
parent 27500 | f1c18ec9f2d7 |
child 27576 | 7afff36043e6 |
permissions | -rw-r--r-- |
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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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Isabelle/Isar toplevel transactions. |
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*) |
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signature TOPLEVEL = |
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sig |
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exception UNDEF |
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type 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 -> ProofNode.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 toplevel: state |
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val is_toplevel: state -> bool |
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val is_theory: state -> bool |
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val is_proof: state -> bool |
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val 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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exception CONTEXT of Proof.context * exn |
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exception TOPLEVEL_ERROR |
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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 init_of: transition -> string option |
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val name_of: transition -> string |
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val str_of: transition -> string |
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val name: string -> transition -> transition |
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val position: Position.T -> transition -> transition |
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val interactive: bool -> transition -> transition |
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val print: transition -> transition |
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val no_timing: transition -> transition |
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val init_theory: string -> (bool -> theory) -> (theory -> unit) -> (theory -> unit) -> |
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transition -> transition |
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val init_empty: (state -> bool) -> (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 generic_theory: (generic_theory -> generic_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 -> (bool -> local_theory -> Proof.state) -> |
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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: (ProofNode.T -> ProofNode.T) -> transition -> transition |
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val skip_proof: (int -> int) -> transition -> transition |
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val skip_proof_to_theory: (int -> bool) -> transition -> transition |
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val get_id: transition -> string option |
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val put_id: string -> transition -> transition |
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val unknown_theory: transition -> transition |
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val unknown_proof: transition -> transition |
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val unknown_context: transition -> transition |
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parents:
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val error_msg: transition -> exn * string -> unit |
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val transition: bool -> transition -> state -> (state * (exn * string) option) option |
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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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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.context; |
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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 (the_default "-" loc) thy |
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| loc_begin NONE (Context.Proof lthy) = lthy |
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| loc_begin (SOME 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) = fn lthy' => |
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Context.Proof (LocalTheory.reinit (LocalTheory.raw_theory (K (loc_exit lthy')) lthy)); |
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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 ProofNode.T * ((Proof.context -> generic_theory) * generic_theory) | |
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(*proof node, finish, original theory*) |
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SkipProof of int * (generic_theory * generic_theory); |
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(*proof depth, 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 (ProofNode.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 loc (cases_node Context.theory_of Proof.theory_of node) |
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| presentation_context NONE _ = raise UNDEF; |
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fun reset_presentation (Theory (gthy, _)) = Theory (gthy, NONE) |
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| reset_presentation node = node; |
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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 (ProofNode.current prf) |
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| SkipProof (d, _) => d + 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, _) => ProofNode.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 (TheoryTarget.init NONE) I; |
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fun print_state_context state = |
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(case try node_of state of |
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NONE => [] |
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| SOME (Theory (gthy, _)) => pretty_context gthy |
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| SOME (Proof (_, (_, gthy))) => pretty_context gthy |
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| SOME (SkipProof (_, (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 |
|
223 |
| SOME (Proof (prf, _)) => |
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Proof.pretty_state (ProofNode.position prf) (ProofNode.current prf) |
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| SOME (SkipProof (d, _)) => [Pretty.str ("skipped proof: depth " ^ string_of_int d)]) |
23701 | 226 |
|> Pretty.markup_chunks Markup.state |> Pretty.writeln; |
16815 | 227 |
|
228 |
||
15668 | 229 |
|
5828 | 230 |
(** toplevel transitions **) |
231 |
||
16682 | 232 |
val quiet = ref false; |
22135 | 233 |
val debug = Output.debugging; |
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234 |
val interact = ref false; |
16682 | 235 |
val timing = Output.timing; |
236 |
val profiling = ref 0; |
|
16815 | 237 |
val skip_proofs = ref false; |
16682 | 238 |
|
5828 | 239 |
exception TERMINATE; |
5990 | 240 |
exception RESTART; |
7022 | 241 |
exception EXCURSION_FAIL of exn * string; |
6689 | 242 |
exception FAILURE of state * exn; |
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243 |
exception TOPLEVEL_ERROR; |
5828 | 244 |
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245 |
|
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246 |
(* print exceptions *) |
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247 |
|
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exception CONTEXT of Proof.context * exn; |
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249 |
|
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fun exn_context NONE exn = exn |
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| exn_context (SOME ctxt) exn = CONTEXT (ctxt, exn); |
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252 |
|
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253 |
local |
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254 |
|
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fun if_context NONE _ _ = [] |
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256 |
| if_context (SOME ctxt) f xs = map (f ctxt) xs; |
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257 |
|
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258 |
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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261 |
|
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262 |
in |
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263 |
|
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264 |
fun exn_message e = |
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265 |
let |
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266 |
val detailed = ! debug; |
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267 |
|
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268 |
fun exn_msg _ (CONTEXT (ctxt, exn)) = exn_msg (SOME ctxt) exn |
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| exn_msg ctxt (Exn.EXCEPTIONS (exns, "")) = cat_lines (map (exn_msg ctxt) exns) |
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| exn_msg ctxt (Exn.EXCEPTIONS (exns, msg)) = cat_lines (map (exn_msg ctxt) exns @ [msg]) |
26293 | 271 |
| exn_msg ctxt (EXCURSION_FAIL (exn, loc)) = |
272 |
exn_msg ctxt exn ^ Markup.markup Markup.location ("\n" ^ loc) |
|
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273 |
| exn_msg _ TERMINATE = "Exit." |
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274 |
| exn_msg _ RESTART = "Restart." |
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275 |
| exn_msg _ Interrupt = "Interrupt." |
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276 |
| exn_msg _ TimeLimit.TimeOut = "Timeout." |
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277 |
| exn_msg _ TOPLEVEL_ERROR = "Error." |
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278 |
| exn_msg _ (SYS_ERROR msg) = "## SYSTEM ERROR ##\n" ^ msg |
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279 |
| exn_msg _ (ERROR msg) = msg |
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280 |
| exn_msg _ (Fail msg) = raised "Fail" [msg] |
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281 |
| exn_msg _ (THEORY (msg, thys)) = |
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282 |
raised "THEORY" (msg :: (if detailed then map Context.str_of_thy thys else [])) |
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283 |
| exn_msg _ (Syntax.AST (msg, asts)) = raised "AST" (msg :: |
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284 |
(if detailed then map (Pretty.string_of o Syntax.pretty_ast) asts else [])) |
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285 |
| exn_msg ctxt (TYPE (msg, Ts, ts)) = raised "TYPE" (msg :: |
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286 |
(if detailed then |
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287 |
if_context ctxt Syntax.string_of_typ Ts @ if_context ctxt Syntax.string_of_term ts |
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288 |
else [])) |
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289 |
| exn_msg ctxt (TERM (msg, ts)) = raised "TERM" (msg :: |
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(if detailed then if_context ctxt Syntax.string_of_term ts else [])) |
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291 |
| exn_msg ctxt (THM (msg, i, thms)) = raised ("THM " ^ string_of_int i) (msg :: |
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292 |
(if detailed then if_context ctxt ProofContext.string_of_thm thms else [])) |
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293 |
| exn_msg _ exn = raised (General.exnMessage exn) [] |
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294 |
in exn_msg NONE e end; |
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295 |
|
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296 |
end; |
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|
297 |
|
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298 |
|
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299 |
(* controlled execution *) |
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300 |
|
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301 |
local |
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302 |
|
18685 | 303 |
fun debugging f x = |
23940 | 304 |
if ! debug then exception_trace (fn () => f x) |
18685 | 305 |
else f x; |
306 |
||
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307 |
fun toplevel_error f x = |
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308 |
let val ctxt = try ML_Context.the_local_context () in |
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309 |
f x handle exn => |
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310 |
(Output.error_msg (exn_message (exn_context ctxt exn)); raise TOPLEVEL_ERROR) |
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311 |
end; |
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312 |
|
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313 |
in |
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314 |
|
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315 |
fun controlled_execution f = |
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316 |
f |
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317 |
|> debugging |
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318 |
|> interruptible; |
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319 |
|
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320 |
fun program f = |
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|
321 |
(f |
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|
322 |
|> debugging |
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323 |
|> toplevel_error) (); |
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324 |
|
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325 |
end; |
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326 |
|
5828 | 327 |
|
16815 | 328 |
(* node transactions and recovery from stale theories *) |
6689 | 329 |
|
16815 | 330 |
(*NB: proof commands should be non-destructive!*) |
7022 | 331 |
|
6689 | 332 |
local |
333 |
||
16452 | 334 |
fun is_stale state = Context.is_stale (theory_of state) handle UNDEF => false; |
6689 | 335 |
|
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336 |
fun is_draft_theory (Theory (gthy, _)) = Context.is_draft (Context.theory_of gthy) |
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337 |
| is_draft_theory _ = false; |
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338 |
|
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339 |
fun stale_error NONE = SOME (ERROR "Stale theory encountered after successful execution!") |
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340 |
| stale_error some = some; |
16815 | 341 |
|
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342 |
fun map_theory f = History.map_current |
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343 |
(fn Theory (gthy, ctxt) => Theory (Context.mapping f (LocalTheory.raw_theory f) gthy, ctxt) |
21177 | 344 |
| node => node); |
6689 | 345 |
|
346 |
in |
|
347 |
||
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348 |
fun transaction hist pos f (node, term) = |
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349 |
let |
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350 |
val _ = is_draft_theory (History.current node) andalso |
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351 |
error "Illegal draft theory in toplevel state"; |
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352 |
val cont_node = node |> History.map_current reset_presentation; |
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353 |
val back_node = cont_node |> map_theory Theory.copy |> map_theory Theory.checkpoint; |
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354 |
fun state_error e nd = (State (nd, term), e); |
6689 | 355 |
|
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356 |
val (result, err) = |
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357 |
cont_node |
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358 |
|> (f |
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359 |
|> (if hist then History.apply' (History.current back_node) else History.map_current) |
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360 |
|> controlled_execution) |
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361 |
|> map_theory Theory.checkpoint |
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362 |
|> state_error NONE |
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363 |
handle exn => state_error (SOME exn) cont_node; |
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364 |
|
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365 |
val (result', err') = |
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366 |
if is_stale result then state_error (stale_error err) back_node |
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367 |
else (result, err); |
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368 |
in |
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369 |
(case err' of |
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370 |
NONE => result' |
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371 |
| SOME exn => raise FAILURE (result', exn)) |
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|
372 |
end; |
6689 | 373 |
|
374 |
end; |
|
375 |
||
376 |
||
377 |
(* primitive transitions *) |
|
378 |
||
18563 | 379 |
(*Note: Recovery from stale theories is provided only for theory-level |
18589 | 380 |
operations via Transaction. Other node or state operations should |
381 |
not touch theories at all. Interrupts are enabled only for Keep and |
|
382 |
Transaction.*) |
|
5828 | 383 |
|
384 |
datatype trans = |
|
27441 | 385 |
Init of string * (bool -> theory) * ((theory -> unit) * (theory -> unit)) | |
386 |
(*name; init node; with exit/kill operation*) |
|
25441
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|
387 |
InitEmpty of (state -> bool) * (unit -> unit) | (*init empty toplevel*) |
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refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
388 |
Exit | (*conclude node -- deferred until init*) |
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
389 |
UndoExit | (*continue after conclusion*) |
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
390 |
Kill | (*abort node*) |
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
391 |
History of node History.T -> node History.T | (*history operation (undo etc.)*) |
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
392 |
Keep of bool -> state -> unit | (*peek at state*) |
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
393 |
Transaction of bool * (bool -> node -> node); (*node transaction*) |
6689 | 394 |
|
15531 | 395 |
fun undo_limit int = if int then NONE else SOME 0; |
6689 | 396 |
|
22056 | 397 |
fun safe_exit (Toplevel (SOME (node, (exit, _)))) = |
398 |
(case try the_global_theory (History.current node) of |
|
25219 | 399 |
SOME thy => controlled_execution exit thy |
22056 | 400 |
| NONE => ()) |
401 |
| safe_exit _ = (); |
|
21958
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
402 |
|
6689 | 403 |
local |
5828 | 404 |
|
21958
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
405 |
fun keep_state int f = controlled_execution (fn x => tap (f int) x); |
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
406 |
|
27441 | 407 |
fun apply_tr int _ (Init (_, f, term)) (state as Toplevel _) = |
26624
770265032999
transaction/init: ensure stable theory (non-draft);
wenzelm
parents:
26621
diff
changeset
|
408 |
let val node = Theory (Context.Theory (Theory.checkpoint (f int)), NONE) |
22056 | 409 |
in safe_exit state; State (History.init (undo_limit int) node, term) end |
25441
4028958d19ff
init_empty: check before change (avoids non-linear update);
wenzelm
parents:
25292
diff
changeset
|
410 |
| apply_tr int _ (InitEmpty (check, f)) (state as Toplevel _) = |
4028958d19ff
init_empty: check before change (avoids non-linear update);
wenzelm
parents:
25292
diff
changeset
|
411 |
if check state then (safe_exit state; keep_state int (fn _ => fn _ => f ()) toplevel) |
4028958d19ff
init_empty: check before change (avoids non-linear update);
wenzelm
parents:
25292
diff
changeset
|
412 |
else raise UNDEF |
23363
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
413 |
| apply_tr _ _ Exit (State (node, term)) = |
22056 | 414 |
(the_global_theory (History.current node); Toplevel (SOME (node, term))) |
23363
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
415 |
| apply_tr _ _ UndoExit (Toplevel (SOME state_info)) = State state_info |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
416 |
| apply_tr _ _ Kill (State (node, (_, kill))) = |
22056 | 417 |
(kill (the_global_theory (History.current node)); toplevel) |
23363
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
418 |
| apply_tr _ _ (History f) (State (node, term)) = State (f node, term) |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
419 |
| apply_tr int _ (Keep f) state = keep_state int f state |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
420 |
| apply_tr int pos (Transaction (hist, f)) (State state) = |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
421 |
transaction hist pos (fn x => f int x) state |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
422 |
| apply_tr _ _ _ _ = raise UNDEF; |
5828 | 423 |
|
23363
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
424 |
fun apply_union _ _ [] state = raise FAILURE (state, UNDEF) |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
425 |
| apply_union int pos (tr :: trs) state = |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
426 |
apply_tr int pos tr state |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
427 |
handle UNDEF => apply_union int pos trs state |
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
428 |
| FAILURE (alt_state, UNDEF) => apply_union int pos trs alt_state |
6689 | 429 |
| exn as FAILURE _ => raise exn |
430 |
| exn => raise FAILURE (state, exn); |
|
431 |
||
432 |
in |
|
433 |
||
23363
9981199bf865
transaction: context_position (non-destructive only);
wenzelm
parents:
22588
diff
changeset
|
434 |
fun apply_trans int pos trs state = (apply_union int pos trs state, NONE) |
15531 | 435 |
handle FAILURE (alt_state, exn) => (alt_state, SOME exn) | exn => (state, SOME exn); |
6689 | 436 |
|
437 |
end; |
|
5828 | 438 |
|
439 |
||
440 |
(* datatype transition *) |
|
441 |
||
442 |
datatype transition = Transition of |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
443 |
{name: string, (*command name*) |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
444 |
pos: Position.T, (*source position*) |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
445 |
int_only: bool, (*interactive-only*) |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
446 |
print: bool, (*print result state*) |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
447 |
no_timing: bool, (*suppress timing*) |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
448 |
trans: trans list}; (*primitive transitions (union)*) |
5828 | 449 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
450 |
fun make_transition (name, pos, int_only, print, no_timing, trans) = |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
451 |
Transition {name = name, pos = pos, int_only = int_only, print = print, no_timing = no_timing, |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
452 |
trans = trans}; |
5828 | 453 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
454 |
fun map_transition f (Transition {name, pos, int_only, print, no_timing, trans}) = |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
455 |
make_transition (f (name, pos, int_only, print, no_timing, trans)); |
5828 | 456 |
|
27441 | 457 |
val empty = make_transition ("", Position.none, false, false, false, []); |
5828 | 458 |
|
459 |
||
460 |
(* diagnostics *) |
|
461 |
||
27441 | 462 |
fun init_of (Transition {trans = [Init (name, _, _)], ...}) = SOME name |
463 |
| init_of _ = NONE; |
|
464 |
||
27427 | 465 |
fun name_of (Transition {name, ...}) = name; |
466 |
fun str_of (Transition {name, pos, ...}) = quote name ^ Position.str_of pos; |
|
5828 | 467 |
|
27427 | 468 |
fun command_msg msg tr = msg ^ "command " ^ str_of tr; |
5828 | 469 |
fun at_command tr = command_msg "At " tr ^ "."; |
470 |
||
471 |
fun type_error tr state = |
|
18685 | 472 |
ERROR (command_msg "Illegal application of " tr ^ " " ^ str_of_state state); |
5828 | 473 |
|
474 |
||
475 |
(* modify transitions *) |
|
476 |
||
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
477 |
fun name nm = map_transition (fn (_, pos, int_only, print, no_timing, trans) => |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
478 |
(nm, pos, int_only, print, no_timing, trans)); |
9010 | 479 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
480 |
fun position pos = map_transition (fn (name, _, int_only, print, no_timing, trans) => |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
481 |
(name, pos, int_only, print, no_timing, trans)); |
5828 | 482 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
483 |
fun interactive int_only = map_transition (fn (name, pos, _, print, no_timing, trans) => |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
484 |
(name, pos, int_only, print, no_timing, trans)); |
14923 | 485 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
486 |
val no_timing = map_transition (fn (name, pos, int_only, print, _, trans) => |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
487 |
(name, pos, int_only, print, true, trans)); |
17363 | 488 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
489 |
fun add_trans tr = map_transition (fn (name, pos, int_only, print, no_timing, trans) => |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
490 |
(name, pos, int_only, print, no_timing, trans @ [tr])); |
16607 | 491 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
492 |
val print = map_transition (fn (name, pos, int_only, _, no_timing, trans) => |
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
493 |
(name, pos, int_only, true, no_timing, trans)); |
5828 | 494 |
|
495 |
||
21007 | 496 |
(* basic transitions *) |
5828 | 497 |
|
27441 | 498 |
fun init_theory name f exit kill = add_trans (Init (name, f, (exit, kill))); |
25441
4028958d19ff
init_empty: check before change (avoids non-linear update);
wenzelm
parents:
25292
diff
changeset
|
499 |
fun init_empty check f = add_trans (InitEmpty (check, f)); |
6689 | 500 |
val exit = add_trans Exit; |
21958
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
501 |
val undo_exit = add_trans UndoExit; |
6689 | 502 |
val kill = add_trans Kill; |
20128
8f0e07d7cf92
keep/transaction: unified execution model (with debugging etc.);
wenzelm
parents:
19996
diff
changeset
|
503 |
val history = add_trans o History; |
7612 | 504 |
val keep' = add_trans o Keep; |
18592
451d622bb4a9
transactions now always see quasi-functional intermediate checkpoint;
wenzelm
parents:
18589
diff
changeset
|
505 |
fun map_current f = add_trans (Transaction (false, f)); |
451d622bb4a9
transactions now always see quasi-functional intermediate checkpoint;
wenzelm
parents:
18589
diff
changeset
|
506 |
fun app_current f = add_trans (Transaction (true, f)); |
5828 | 507 |
|
7612 | 508 |
fun keep f = add_trans (Keep (fn _ => f)); |
5828 | 509 |
fun imperative f = keep (fn _ => f ()); |
510 |
||
21007 | 511 |
val unknown_theory = imperative (fn () => warning "Unknown theory context"); |
512 |
val unknown_proof = imperative (fn () => warning "Unknown proof context"); |
|
513 |
val unknown_context = imperative (fn () => warning "Unknown context"); |
|
15668 | 514 |
|
21007 | 515 |
|
516 |
(* theory transitions *) |
|
15668 | 517 |
|
26491 | 518 |
fun generic_theory f = app_current (fn _ => |
519 |
(fn Theory (gthy, _) => Theory (f gthy, NONE) |
|
520 |
| _ => raise UNDEF)); |
|
521 |
||
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
522 |
fun theory' f = app_current (fn int => |
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
523 |
(fn Theory (Context.Theory thy, _) => Theory (Context.Theory (f int thy), NONE) |
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
524 |
| _ => raise UNDEF)); |
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
525 |
|
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
526 |
fun theory f = theory' (K f); |
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
527 |
|
21294 | 528 |
fun begin_local_theory begin f = app_current (fn _ => |
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
529 |
(fn Theory (Context.Theory thy, _) => |
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
530 |
let |
20985 | 531 |
val lthy = f thy; |
21294 | 532 |
val gthy = if begin then Context.Proof lthy else Context.Theory (loc_exit lthy); |
533 |
in Theory (gthy, SOME lthy) end |
|
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
534 |
| _ => raise UNDEF)); |
17076 | 535 |
|
21294 | 536 |
val end_local_theory = app_current (fn _ => |
537 |
(fn Theory (Context.Proof lthy, _) => Theory (Context.Theory (loc_exit lthy), SOME lthy) |
|
21007 | 538 |
| _ => raise UNDEF)); |
539 |
||
540 |
local |
|
541 |
||
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
542 |
fun local_theory_presentation loc f g = app_current (fn int => |
21294 | 543 |
(fn Theory (gthy, _) => |
544 |
let |
|
545 |
val finish = loc_finish loc gthy; |
|
25960 | 546 |
val lthy' = f (loc_begin loc gthy); |
21294 | 547 |
in Theory (finish lthy', SOME lthy') end |
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
548 |
| _ => raise UNDEF) #> tap (g int)); |
15668 | 549 |
|
21007 | 550 |
in |
551 |
||
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
552 |
fun local_theory loc f = local_theory_presentation loc f (K I); |
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
553 |
fun present_local_theory loc g = local_theory_presentation loc I g; |
18955 | 554 |
|
21007 | 555 |
end; |
556 |
||
557 |
||
558 |
(* proof transitions *) |
|
559 |
||
560 |
fun end_proof f = map_current (fn int => |
|
24795
6f5cb7885fd7
print_state_context: local theory context, not proof context;
wenzelm
parents:
24780
diff
changeset
|
561 |
(fn Proof (prf, (finish, _)) => |
27564
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
562 |
let val state = ProofNode.current prf in |
21007 | 563 |
if can (Proof.assert_bottom true) state then |
564 |
let |
|
565 |
val ctxt' = f int state; |
|
566 |
val gthy' = finish ctxt'; |
|
567 |
in Theory (gthy', SOME ctxt') end |
|
568 |
else raise UNDEF |
|
569 |
end |
|
27564
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
570 |
| SkipProof (0, (gthy, _)) => Theory (gthy, NONE) |
21007 | 571 |
| _ => raise UNDEF)); |
572 |
||
21294 | 573 |
local |
574 |
||
575 |
fun begin_proof init finish = app_current (fn int => |
|
576 |
(fn Theory (gthy, _) => |
|
577 |
let |
|
24453 | 578 |
val prf = init int gthy; |
21294 | 579 |
val schematic = Proof.schematic_goal prf; |
580 |
in |
|
581 |
if ! skip_proofs andalso schematic then |
|
582 |
warning "Cannot skip proof of schematic goal statement" |
|
583 |
else (); |
|
584 |
if ! skip_proofs andalso not schematic then |
|
27564
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
585 |
SkipProof (0, (finish gthy (Proof.global_skip_proof int prf), gthy)) |
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
586 |
else Proof (ProofNode.init prf, (finish gthy, gthy)) |
21294 | 587 |
end |
588 |
| _ => raise UNDEF)); |
|
589 |
||
590 |
in |
|
591 |
||
24780
47bb1e380d83
local_theory transactions: more careful treatment of context position;
wenzelm
parents:
24634
diff
changeset
|
592 |
fun local_theory_to_proof' loc f = begin_proof |
25960 | 593 |
(fn int => fn gthy => f int (loc_begin loc gthy)) |
24780
47bb1e380d83
local_theory transactions: more careful treatment of context position;
wenzelm
parents:
24634
diff
changeset
|
594 |
(loc_finish loc); |
47bb1e380d83
local_theory transactions: more careful treatment of context position;
wenzelm
parents:
24634
diff
changeset
|
595 |
|
24453 | 596 |
fun local_theory_to_proof loc f = local_theory_to_proof' loc (K f); |
21294 | 597 |
|
598 |
fun theory_to_proof f = begin_proof |
|
24780
47bb1e380d83
local_theory transactions: more careful treatment of context position;
wenzelm
parents:
24634
diff
changeset
|
599 |
(K (fn Context.Theory thy => f thy | _ => raise UNDEF)) |
47bb1e380d83
local_theory transactions: more careful treatment of context position;
wenzelm
parents:
24634
diff
changeset
|
600 |
(K (Context.Theory o ProofContext.theory_of)); |
21294 | 601 |
|
602 |
end; |
|
603 |
||
21007 | 604 |
val forget_proof = map_current (fn _ => |
605 |
(fn Proof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE) |
|
606 |
| SkipProof (_, (_, orig_gthy)) => Theory (orig_gthy, NONE) |
|
607 |
| _ => raise UNDEF)); |
|
608 |
||
21177 | 609 |
fun present_proof f = map_current (fn int => |
27564
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
610 |
(fn Proof (prf, x) => Proof (ProofNode.apply I prf, x) |
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
611 |
| skip as SkipProof _ => skip |
21177 | 612 |
| _ => raise UNDEF) #> tap (f int)); |
613 |
||
17904
21c6894b5998
simplified interfaces proof/proof' etc.: perform ProofHistory.apply(s)/current internally;
wenzelm
parents:
17513
diff
changeset
|
614 |
fun proofs' f = map_current (fn int => |
27564
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
615 |
(fn Proof (prf, x) => Proof (ProofNode.applys (f int) prf, x) |
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
616 |
| skip as SkipProof _ => skip |
16815 | 617 |
| _ => raise UNDEF)); |
15668 | 618 |
|
17904
21c6894b5998
simplified interfaces proof/proof' etc.: perform ProofHistory.apply(s)/current internally;
wenzelm
parents:
17513
diff
changeset
|
619 |
fun proof' f = proofs' (Seq.single oo f); |
21c6894b5998
simplified interfaces proof/proof' etc.: perform ProofHistory.apply(s)/current internally;
wenzelm
parents:
17513
diff
changeset
|
620 |
val proofs = proofs' o K; |
6689 | 621 |
val proof = proof' o K; |
16815 | 622 |
|
623 |
fun actual_proof f = map_current (fn _ => |
|
21007 | 624 |
(fn Proof (prf, x) => Proof (f prf, x) |
20963
a7fd8f05a2be
added type global_theory -- theory or local_theory;
wenzelm
parents:
20928
diff
changeset
|
625 |
| _ => raise UNDEF)); |
16815 | 626 |
|
627 |
fun skip_proof f = map_current (fn _ => |
|
21007 | 628 |
(fn SkipProof (h, x) => SkipProof (f h, x) |
18563 | 629 |
| _ => raise UNDEF)); |
630 |
||
27564
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
631 |
fun skip_proof_to_theory pred = map_current (fn _ => |
fc6d34e49e17
replaced obsolete ProofHistory by ProofNode (backtracking only);
wenzelm
parents:
27500
diff
changeset
|
632 |
(fn SkipProof (d, (gthy, _)) => if pred d then Theory (gthy, NONE) else raise UNDEF |
17904
21c6894b5998
simplified interfaces proof/proof' etc.: perform ProofHistory.apply(s)/current internally;
wenzelm
parents:
17513
diff
changeset
|
633 |
| _ => raise UNDEF)); |
5828 | 634 |
|
635 |
||
636 |
||
637 |
(** toplevel transactions **) |
|
638 |
||
27427 | 639 |
(* identification *) |
640 |
||
641 |
fun get_id (Transition {pos, ...}) = Position.get_id pos; |
|
642 |
fun put_id id (tr as Transition {pos, ...}) = position (Position.put_id id pos) tr; |
|
643 |
||
644 |
||
25960 | 645 |
(* thread position *) |
25799 | 646 |
|
25960 | 647 |
fun setmp_thread_position (Transition {pos, ...}) f x = |
25819
e6feb08b7f4b
replaced thread_properties by simplified version in position.ML;
wenzelm
parents:
25809
diff
changeset
|
648 |
Position.setmp_thread_data pos f x; |
25799 | 649 |
|
26602
5534b6a6b810
made purely value-oriented, moved global state to structure Isar (cf. isar.ML);
wenzelm
parents:
26491
diff
changeset
|
650 |
fun error_msg tr exn_info = |
5534b6a6b810
made purely value-oriented, moved global state to structure Isar (cf. isar.ML);
wenzelm
parents:
26491
diff
changeset
|
651 |
setmp_thread_position tr (fn () => Output.error_msg (exn_message (EXCURSION_FAIL exn_info))) (); |
5534b6a6b810
made purely value-oriented, moved global state to structure Isar (cf. isar.ML);
wenzelm
parents:
26491
diff
changeset
|
652 |
|
25799 | 653 |
|
5828 | 654 |
(* apply transitions *) |
655 |
||
6664 | 656 |
local |
657 |
||
25799 | 658 |
fun app int (tr as Transition {trans, pos, int_only, print, no_timing, ...}) = |
25819
e6feb08b7f4b
replaced thread_properties by simplified version in position.ML;
wenzelm
parents:
25809
diff
changeset
|
659 |
setmp_thread_position tr (fn state => |
25799 | 660 |
let |
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
661 |
val _ = if not int andalso int_only then warning (command_msg "Interactive-only " tr) else (); |
16682 | 662 |
|
25799 | 663 |
fun do_timing f x = (warning (command_msg "" tr); timeap f x); |
664 |
fun do_profiling f x = profile (! profiling) f x; |
|
665 |
||
26256
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
666 |
val (result, status) = |
25799 | 667 |
state |> (apply_trans int pos trans |
668 |
|> (if ! profiling > 0 andalso not no_timing then do_profiling else I) |
|
669 |
|> (if ! profiling > 0 orelse ! timing andalso not no_timing then do_timing else I)); |
|
26256
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
670 |
|
26621
78b3ad7af5d5
eliminated unused name_of, source, source_of, print', print3, three_buffersN;
wenzelm
parents:
26602
diff
changeset
|
671 |
val _ = if int andalso not (! quiet) andalso print then print_state false result else (); |
26256
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
672 |
in (result, Option.map (fn UNDEF => type_error tr state | exn => exn) status) end); |
6664 | 673 |
|
674 |
in |
|
5828 | 675 |
|
26602
5534b6a6b810
made purely value-oriented, moved global state to structure Isar (cf. isar.ML);
wenzelm
parents:
26491
diff
changeset
|
676 |
fun transition int tr st = |
26256
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
677 |
let val ctxt = try context_of st in |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
678 |
(case app int tr st of |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
679 |
(_, SOME TERMINATE) => NONE |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
680 |
| (_, SOME RESTART) => SOME (toplevel, NONE) |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
681 |
| (state', SOME (EXCURSION_FAIL exn_info)) => SOME (state', SOME exn_info) |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
682 |
| (state', SOME exn) => SOME (state', SOME (exn_context ctxt exn, at_command tr)) |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
683 |
| (state', NONE) => SOME (state', NONE)) |
3e7939e978c6
added exception CONTEXT, indicating context of another exception;
wenzelm
parents:
26081
diff
changeset
|
684 |
end; |
6664 | 685 |
|
686 |
end; |
|
5828 | 687 |
|
688 |
||
17076 | 689 |
(* excursion: toplevel -- apply transformers/presentation -- toplevel *) |
5828 | 690 |
|
6664 | 691 |
local |
692 |
||
5828 | 693 |
fun excur [] x = x |
17076 | 694 |
| excur ((tr, pr) :: trs) (st, res) = |
26602
5534b6a6b810
made purely value-oriented, moved global state to structure Isar (cf. isar.ML);
wenzelm
parents:
26491
diff
changeset
|
695 |
(case transition (! interact) tr st of |
15531 | 696 |
SOME (st', NONE) => |
26982
de7738deadfb
present_excursion: setmp_thread_position during presentation;
wenzelm
parents:
26624
diff
changeset
|
697 |
excur trs (st', setmp_thread_position tr (fn () => pr st st' res) () handle exn => |
10324 | 698 |
raise EXCURSION_FAIL (exn, "Presentation failed\n" ^ at_command tr)) |
15531 | 699 |
| SOME (st', SOME exn_info) => raise EXCURSION_FAIL exn_info |
700 |
| NONE => raise EXCURSION_FAIL (TERMINATE, at_command tr)); |
|
5828 | 701 |
|
17076 | 702 |
fun no_pr _ _ _ = (); |
703 |
||
6664 | 704 |
in |
705 |
||
17076 | 706 |
fun present_excursion trs res = |
21958
9dfd1ca4c0a0
refined notion of empty toplevel, admits undo of 'end';
wenzelm
parents:
21861
diff
changeset
|
707 |
(case excur trs (toplevel, res) of |
22056 | 708 |
(state as Toplevel _, res') => (safe_exit state; res') |
18685 | 709 |
| _ => error "Unfinished development at end of input") |
9134 | 710 |
handle exn => error (exn_message exn); |
711 |
||
17076 | 712 |
fun excursion trs = present_excursion (map (rpair no_pr) trs) (); |
7062 | 713 |
|
6664 | 714 |
end; |
715 |
||
5828 | 716 |
end; |