+++ /dev/null
-(* Copyright (C) 2002, HELM Team.
- *
- * This file is part of HELM, an Hypertextual, Electronic
- * Library of Mathematics, developed at the Computer Science
- * Department, University of Bologna, Italy.
- *
- * HELM is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2
- * of the License, or (at your option) any later version.
- *
- * HELM is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with HELM; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
- * MA 02111-1307, USA.
- *
- * For details, see the HELM World-Wide-Web page,
- * http://cs.unibo.it/helm/.
- *)
-
-open CicReduction
-open ProofEngineTypes
-open UriManager
-
-(** DEBUGGING *)
-
- (** perform debugging output? *)
-let debug = false
-
- (** debugging print *)
-let warn s =
- if debug then
- prerr_endline ("TACTICALS WARNING: " ^ s)
-
-
-(** TACTIC{,AL}S *)
-
- (* not a tactical, but it's used only here (?) *)
-
-let id_tac ~status:(proof,goal) =
- (proof,[goal])
-
-
- (**
- naive implementation of ORELSE tactical, try a sequence of tactics in turn:
- if one fails pass to the next one and so on, eventually raises (failure "no
- tactics left")
- TODO warning: not tail recursive due to "try .. with" boxing
-
- Galla: is this exactly Coq's "First"?
-
- *)
-let rec try_tactics ~(tactics: (string * tactic) list) ~status =
- warn "in Tacticals.try_tactics";
- match tactics with
- | (descr, tac)::tactics ->
- warn ("Tacticals.try_tactics IS TRYING " ^ descr);
- (try
- let res = tac ~status in
- warn ("Tacticals.try_tactics: " ^ descr ^ " succedeed!!!");
- res
- with
- e ->
- match e with
- (Fail _)
- | (CicTypeChecker.TypeCheckerFailure (CicTypeChecker.NotWellTyped _))
- | (CicUnification.UnificationFailed) ->
- warn (
- "Tacticals.try_tactics failed with exn: " ^
- Printexc.to_string e);
- try_tactics ~tactics ~status
- | _ -> raise e (* [e] must not be caught ; let's re-raise it *)
- )
- | [] -> raise (Fail "try_tactics: no tactics left")
-
-
-
-let thens ~start ~continuations ~status =
- let (proof,new_goals) = start ~status in
- try
- List.fold_left2
- (fun (proof,goals) goal tactic ->
- let (proof',new_goals') = tactic ~status:(proof,goal) in
- (proof',goals@new_goals')
- ) (proof,[]) new_goals continuations
- with
- Invalid_argument _ -> raise (Fail "thens: wrong number of new goals")
-
-
-
-let then_ ~start ~continuation ~status =
- let (proof,new_goals) = start ~status in
- List.fold_left
- (fun (proof,goals) goal ->
- let (proof',new_goals') = continuation ~status:(proof,goal) in
- (proof',goals@new_goals')
- ) (proof,[]) new_goals
-
-
-(* Galla *)
-(* si suppone che tutte le tattiche sollevino solamente Fail? *)
-
-
-(* TODO: x debug: i due tatticali seguenti non contano quante volte hanno applicato la tattica *)
-
-(* This keep on appling tactic until it fails *)
-(* When <tactic> generates more than one goal, you have a tree of
- application on the tactic, repeat_tactic works in depth on this tree *)
-
-let rec repeat_tactic ~tactic ~status =
- warn "in repeat_tactic";
- try let (proof, goallist) = tactic ~status in
- let rec step proof goallist =
- match goallist with
- [] -> (proof, [])
- | head::tail ->
- let (proof', goallist') = repeat_tactic ~tactic ~status:(proof, head) in
- let (proof'', goallist'') = step proof' tail in
- proof'', goallist'@goallist''
- in
- step proof goallist
- with
- (Fail _) as e ->
- warn ("Tacticals.repeat_tactic failed after nth time with exception: " ^ Printexc.to_string e) ;
- id_tac ~status
-;;
-
-
-
-(* This tries to apply tactic n times *)
-
-let rec do_tactic ~n ~tactic ~status =
- warn "in do_tactic";
- try
- let (proof, goallist) =
- if (n>0) then tactic ~status
- else id_tac ~status in
-(* else (proof, []) in *)(* perche' non va bene questo? stessa questione di ##### ? *)
- let rec step proof goallist =
- match goallist with
- [] -> (proof, [])
- | head::tail ->
- let (proof', goallist') = do_tactic ~n:(n-1) ~tactic ~status:(proof, head) in
- let (proof'', goallist'') = step proof' tail in
- proof'', goallist'@goallist''
- in
- step proof goallist
- with
- (Fail _) as e ->
- warn ("Tacticals.do_tactic failed after nth time with exception: " ^ Printexc.to_string e) ;
- id_tac ~status
-;;
-
-
-
-(* This applies tactic and catches its possible failure *)
-
-let rec try_tactic ~tactic ~status =
- warn "in Tacticals.try_tactic";
- try
- tactic ~status
- with
- (Fail _) as e ->
- warn ( "Tacticals.try_tactic failed with exn: " ^ Printexc.to_string e);
- id_tac ~status
-;;
-
-
-(* This tries tactics until one of them doesn't _solve_ the goal *)
-(* TODO: si puo' unificare le 2(due) chiamate ricorsive? *)
-
-let rec solve_tactics ~(tactics: (string * tactic) list) ~status =
- warn "in Tacticals.solve_tactics";
- match tactics with
- | (descr, currenttactic)::moretactics ->
- warn ("Tacticals.solve_tactics is trying " ^ descr);
- (try
- let (proof, goallist) = currenttactic ~status in
- match goallist with
- [] -> warn ("Tacticals.solve_tactics: " ^ descr ^ " solved the goal!!!");
-(* questo significa che non ci sono piu' goal, o che current_tactic non ne ha aperti di nuovi? (la 2a!) ##### *)
-(* nel secondo caso basta per dire che solve_tactics has solved the goal? (si!) *)
- (proof, goallist)
- | _ -> warn ("Tacticals.solve_tactics: try the next tactic");
- solve_tactics ~tactics:(moretactics) ~status
- with
- (Fail _) as e ->
- warn ("Tacticals.solve_tactics: current tactic failed with exn: " ^ Printexc.to_string e);
- solve_tactics ~tactics ~status
- )
- | [] -> raise (Fail "solve_tactics cannot solve the goal");
- id_tac ~status
-;;
-
-
-
-
-
-
-
-
-
-
- (** tattica di prova per debuggare i tatticali *)
-(*
-let thens' ~start ~continuations ~status =
- let (proof,new_goals) = start ~status in
- try
- List.fold_left2
- (fun (proof,goals) goal tactic ->
- let (proof',new_goals') = tactic ~status:(proof,goal) in
- (proof',goals@new_goals')
- ) (proof,[]) new_goals continuations
- with
- Invalid_argument _ -> raise (Fail "thens: wrong number of new goals")
-
-let prova_tac =
- let apply_T_tac ~status:((proof,goal) as status) =
- let curi,metasenv,pbo,pty = proof in
- let metano,context,gty = List.find (function (m,_,_) -> m=goal) metasenv in
- let rel =
- let rec find n =
- function
- [] -> assert false
- | (Some (Cic.Name name,_))::_ when name = "T" -> n
- | _::tl -> find (n+1) tl
- in
- prerr_endline ("eseguo find");
- find 1 context
- in
- prerr_endline ("eseguo apply");
- apply_tac ~term:(Cic.Rel rel) ~status
- in
-(* do_tactic ~n:2 *)
- repeat_tactic
- ~tactic:
- (then_
- ~start:(intros_tac ~name:"pippo")
- ~continuation:(thens' ~start:apply_T_tac ~continuations:[id_tac ; apply_tac ~term:(Cic.Rel 1)]))
-(* id_tac *)
-;;
-*)
-
-
projects / helm.git / blobdiff