walther@59908: (* Title: TODO/state-step.sml
walther@59908:    Author: Walther Neuper
walther@59908:    (c) due to copyright terms
walther@59908: 
walther@59908: Deprecated; the idea was to hold steps complete such, that they can be replayed.
walther@59908: *)
walther@59908: 
walther@59908: signature STATE_STEPS =
walther@59908: sig
walther@59908:   type single
walther@59908:   val single_empty : single
walther@59908:   type T
walther@59908:   val to_string : T -> string
walther@59908:   val result : single -> (term * term list)
Walther@60509:   val make_single: Rewrite_Ord.id * 'a -> Rule_Set.T -> term * Rule.rule * (term * term list) ->
walther@59931:     single
walther@59908:   val insert_pos : Pos.pos -> T -> T
walther@59908: end
walther@59908: 
walther@59908: (**)
walther@59908: structure State_Steps(**): STATE_STEPS(**) =
walther@59908: struct
walther@59908: (**)
walther@59908: 
walther@59908: (* a single holds alle information required to build a node in the calc-tree;
walther@59908:    a single is assumed to be used efficiently such that the calc-tree
walther@59908:    resulting from applying a single need not be stored separately;
walther@59981:    see "type Calc.state_pre" *)
walther@59908: (*TODO.WN0504 redesign ??? or redesign generate ?? see "fun generate"
walther@59908:   TODO.WN0512 ? redesign this _list_:
walther@59908:   # only used for [Apply_Method + (Take or Subproblem)], i.e. for initacs
walther@59908:   # the latter problem may be resolved automatically if "fun autocalc" is 
walther@59908:     not any more used for the specify-phase and for changing the phases*)
walther@59908: type single = 
walther@59908:   (Tactic.input *                     (* for comparison with input tac             *)      
walther@59908:    Tactic.T *                         (* for ctree generation                      *)
walther@59908:    (Pos.pos' *                            (* after applying tac_, for ctree generation *)
walther@59908:     (Istate_Def.T * Proof.context)))  (* after applying tac_, for ctree generation *)
walther@59908: val single_empty = (Tactic.Empty_Tac, Tactic.Empty_Tac_, (Pos.e_pos', (Istate_Def.empty, ContextC.empty))): single
walther@59908: fun taci2str ((tac, tac_, (pos', (istate, _))):single) =
walther@59908:   "( " ^ Tactic.input_to_string tac ^ ", " ^ Tactic.string_of tac_ ^ ", ( " ^ Pos.pos'2str pos' ^ ", " ^
walther@59908:   Istate_Def.string_of istate ^ " ))"
walther@59908: 
walther@59908: type T = single list;
walther@59908: 
walther@59908: fun to_string tacis = (strs2str o (map (linefeed o taci2str))) tacis
walther@59908: fun result (_, Tactic.Rewrite' (_, _, _, _, _, _,(res, asm)), _) = (res, asm)
walther@59908:   | result (_, Tactic.Rewrite_Set' (_, _, _, _, (res, asm)), _) = (res, asm)
walther@59962:   | result (_, tac_, _) = raise ERROR ("result: called with" ^ Tactic.string_of tac_)
walther@59914: 
walther@59908: fun make_single ro erls (t, r as Rule.Thm (id, thm), (t', a)) = 
walther@59908:       (Tactic.Rewrite (id, thm), 
walther@59908:         Tactic.Rewrite' ("Isac_Knowledge", fst ro, erls, false, ThmC.from_rule r, t, (t', a)),
walther@59908:        (Pos.e_pos'(*to be updated before generate tacis!!!*), (Istate_Def.Uistate, ContextC.empty)))
walther@59908:   | make_single _ _ (t, r as Rule.Rls_ rls, (t', a)) = 
walther@59908:       (Tactic.Rewrite_Set (Rule_Set.id_from_rule r), 
walther@59908:         Tactic.Rewrite_Set' ("Isac_Knowledge", false, rls, t, (t', a)),
walther@59908:        (Pos.e_pos'(*to be updated before generate tacis!!!*), (Istate_Def.Uistate, ContextC.empty)))
walther@59962:   | make_single _ _ (t, r, _) = raise ERROR ("make_single: not impl. for " ^ Rule.to_string r ^ " at " ^ UnparseC.term t)
walther@59908: 
walther@59908: (* update pos in tacis for embedding by generate *)
walther@59908: fun insert_pos (_: Pos.pos) [] = []
walther@59908:   | insert_pos (p: Pos.pos) (((tac, tac_, (_, ist)): single) :: tacis) = 
walther@59908:     ((tac, tac_, ((p, Pos.Res), ist)): single) :: (insert_pos (Pos.lev_on p) tacis)
walther@59908: 
walther@59908: (**)end(**)
walther@59908: