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|
(***********************************************************************)
(* v * The Coq Proof Assistant / The Coq Development Team *)
(* <O___,, * INRIA-Rocquencourt & LRI-CNRS-Orsay *)
(* \VV/ *************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(***********************************************************************)
(*i camlp4deps: "parsing/grammar.cma" i*)
(* $Id$ *)
open Formula
open Sequent
open Rules
open Instances
open Term
open Tacmach
open Tactics
open Tacticals
open Libnames
open Util
open Goptions
(* declaring search depth as a global option *)
let ground_depth=ref 5
let set_qflag b= qflag:=b
let _=
let gdopt=
{ optsync=false;
optname="ground_depth";
optkey=SecondaryTable("Ground","Depth");
optread=(fun ()->Some !ground_depth);
optwrite=
(function
None->ground_depth:=5
| Some i->ground_depth:=(max i 0))}
in
declare_int_option gdopt
let ground_tac solver startseq gl=
let rec toptac ctx seq gl=
if Tacinterp.get_debug()=Tactic_debug.DebugOn 0
then Pp.msgnl (Proof_trees.pr_goal (sig_it gl));
tclORELSE (axiom_tac seq.gl seq)
begin
try
let (hd,seq1)=take_formula seq
and re_add s=re_add_formula_list ctx s in
let continue=toptac []
and backtrack=toptac (hd::ctx) seq1 in
match hd.pat with
Right rpat->
begin
match rpat with
Rand->
and_tac continue seq1
| Rforall->
forall_tac continue seq1
| Rarrow->
arrow_tac continue seq1
| Revaluable egr->
evaluable_tac egr continue seq1
| Ror->
tclORELSE
(or_tac continue (re_add seq1))
backtrack
| Rfalse->backtrack
| Rexists(i,dom,triv)->
let (lfp,seq2)=collect_quantified seq in
tclORELSE
(if seq.depth<=0 || not !qflag then
tclFAIL 0 "max depth"
else
quantified_tac lfp continue (re_add seq))
(toptac (lfp@ctx) seq2)
(* need special backtracking *)
end
| Left lpat->
begin
match lpat with
Lfalse->
left_false_tac hd.id
| Land ind->
left_and_tac ind hd.id continue (re_add seq1)
| Lor ind->
left_or_tac ind hd.id continue (re_add seq1)
| Lforall (_,_,_)->
let (lfp,seq2)=collect_quantified seq in
tclORELSE
(if seq.depth<=0 || not !qflag then
tclFAIL 0 "max depth"
else
quantified_tac lfp continue (re_add seq))
(toptac (lfp@ctx) seq2)
(* need special backtracking *)
| Lexists ind ->
if !qflag then
left_exists_tac ind hd.id continue (re_add seq1)
else backtrack
| Levaluable egr->
left_evaluable_tac egr hd.id continue (re_add seq1)
| LA (typ,lap)->
tclORELSE
(ll_atom_tac typ hd.id continue (re_add seq1))
begin
match lap with
LLatom -> backtrack
| LLand (ind,largs) | LLor(ind,largs)
| LLfalse (ind,largs)->
ll_ind_tac ind largs hd.id continue
(re_add seq1)
| LLforall p ->
tclORELSE
(if seq.depth<=0 || not !qflag then
tclFAIL 0 "max depth"
else
ll_forall_tac p hd.id continue
(re_add seq1))
backtrack
| LLexists (ind,l) ->
if !qflag then
ll_ind_tac ind l hd.id continue
(re_add seq1)
else
backtrack
| LLarrow (a,b,c) ->
tclORELSE
(ll_arrow_tac a b c hd.id continue
(re_add seq1))
backtrack
| LLevaluable egr->
left_evaluable_tac egr hd.id continue
(re_add seq1)
end
end
with Heap.EmptyHeap->solver
end gl in
wrap (List.length (pf_hyps gl)) true (toptac []) (startseq gl) gl
let default_solver=(Tacinterp.interp <:tactic<Auto with *>>)
let fail_solver=tclFAIL 0 "GroundTauto failed"
let gen_ground_tac flag taco l gl=
let backup= !qflag in
try
set_qflag flag;
let solver=
match taco with
Some tac->tac
| None-> default_solver in
let startseq=create_with_ref_list l !ground_depth in
let result=ground_tac solver startseq gl in
set_qflag backup;result
with e -> set_qflag backup;raise e
TACTIC EXTEND Ground
| [ "Ground" tactic(t) "with" ne_reference_list(l) ] ->
[ gen_ground_tac true (Some (snd t)) l ]
| [ "Ground" tactic(t) ] ->
[ gen_ground_tac true (Some (snd t)) [] ]
| [ "Ground" "with" ne_reference_list(l) ] ->
[ gen_ground_tac true None l ]
| [ "Ground" ] ->
[ gen_ground_tac true None [] ]
END
TACTIC EXTEND GTauto
[ "GTauto" ] ->
[ gen_ground_tac false (Some fail_solver) [] ]
END
TACTIC EXTEND GIntuition
["GIntuition" tactic(t)] ->
[ gen_ground_tac false
(Some(tclTHEN normalize_evaluables (snd t))) [] ]
| [ "GIntuition" ] ->
[ gen_ground_tac false
(Some (tclTHEN normalize_evaluables default_solver)) [] ]
END
|
