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(* Title: Provers/classical.ML 
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ID: $Id$ 
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Author: Lawrence C Paulson, Cambridge University Computer Laboratory 

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Copyright 1992 University of Cambridge 

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Theorem prover for classical reasoning, including predicate calculus, set 

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theory, etc. 

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Rules must be classified as intr, elim, safe, hazardous (unsafe). 
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A rule is unsafe unless it can be applied blindly without harmful results. 

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For a rule to be safe, its premises and conclusion should be logically 

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equivalent. There should be no variables in the premises that are not in 

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the conclusion. 

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*) 

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(*higher precedence than := facilitates use of references*) 
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infix 4 addSIs addSEs addSDs addIs addEs addDs delrules 
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addSWrapper delSWrapper addWrapper delWrapper 
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addSbefore addSaltern addbefore addaltern; 
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(*should be a type abbreviation in signature CLASSICAL*) 
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type netpair = (int * (bool * thm)) Net.net * (int * (bool * thm)) Net.net; 
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type wrapper = (int > tactic) > (int > tactic); 
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signature CLASET_THY_DATA = 
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sig 
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val clasetK: string 
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exception ClasetData of object ref 
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val thy_data: string * (object * (object > object) * 

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(object * object > object) * (Sign.sg > object > unit)) 
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val fix_methods: object * (object > object) * 
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(object * object > object) * (Sign.sg > object > unit) > unit 
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end; 
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signature CLASSICAL_DATA = 
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sig 
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val mp : thm (* [ P>Q; P ] ==> Q *) 
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val not_elim : thm (* [ ~P; P ] ==> R *) 
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val classical : thm (* (~P ==> P) ==> P *) 
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val sizef : thm > int (* size function for BEST_FIRST *) 
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val hyp_subst_tacs: (int > tactic) list 
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end; 
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signature CLASSICAL = 

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sig 
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type claset 
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val empty_cs: claset 
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val print_cs: claset > unit 
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val print_claset: theory > unit 
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val rep_cs: (* BLAST_DATA in blast.ML dependent on this *) 
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claset > {safeIs: thm list, safeEs: thm list, 
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hazIs: thm list, hazEs: thm list, 
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swrappers: (string * wrapper) list, 
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uwrappers: (string * wrapper) list, 

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safe0_netpair: netpair, safep_netpair: netpair, 
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haz_netpair: netpair, dup_netpair: netpair} 
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val merge_cs : claset * claset > claset 
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val addDs : claset * thm list > claset 
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val addEs : claset * thm list > claset 
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val addIs : claset * thm list > claset 
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val addSDs : claset * thm list > claset 
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val addSEs : claset * thm list > claset 
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val addSIs : claset * thm list > claset 
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val delrules : claset * thm list > claset 
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val addSWrapper : claset * (string * wrapper) > claset 
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val delSWrapper : claset * string > claset 

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val addWrapper : claset * (string * wrapper) > claset 

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val delWrapper : claset * string > claset 

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val addSbefore : claset * (string * (int > tactic)) > claset 

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val addSaltern : claset * (string * (int > tactic)) > claset 

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val addbefore : claset * (string * (int > tactic)) > claset 

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val addaltern : claset * (string * (int > tactic)) > claset 

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val appSWrappers : claset > wrapper 
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val appWrappers : claset > wrapper 
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val claset_ref_of_sg: Sign.sg > claset ref 
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val claset_ref_of: theory > claset ref 
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val claset_of_sg: Sign.sg > claset 
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val claset_of: theory > claset 
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val CLASET: (claset > tactic) > tactic 
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val CLASET': (claset > 'a > tactic) > 'a > tactic 
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val claset: unit > claset 
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val claset_ref: unit > claset ref 
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val fast_tac : claset > int > tactic 
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val slow_tac : claset > int > tactic 
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val weight_ASTAR : int ref 
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val astar_tac : claset > int > tactic 
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val slow_astar_tac : claset > int > tactic 
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val best_tac : claset > int > tactic 
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val slow_best_tac : claset > int > tactic 
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val depth_tac : claset > int > int > tactic 
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val deepen_tac : claset > int > int > tactic 
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val contr_tac : int > tactic 
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val dup_elim : thm > thm 
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val dup_intr : thm > thm 
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val dup_step_tac : claset > int > tactic 
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val eq_mp_tac : int > tactic 
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val haz_step_tac : claset > int > tactic 
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val joinrules : thm list * thm list > (bool * thm) list 
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val mp_tac : int > tactic 
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val safe_tac : claset > tactic 
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val safe_step_tac : claset > int > tactic 
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val clarify_tac : claset > int > tactic 
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val clarify_step_tac : claset > int > tactic 
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val step_tac : claset > int > tactic 
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val slow_step_tac : claset > int > tactic 
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val swap : thm (* ~P ==> (~Q ==> P) ==> Q *) 
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val swapify : thm list > thm list 
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val swap_res_tac : thm list > int > tactic 
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val inst_step_tac : claset > int > tactic 
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val inst0_step_tac : claset > int > tactic 
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val instp_step_tac : claset > int > tactic 
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val AddDs : thm list > unit 

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val AddEs : thm list > unit 

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val AddIs : thm list > unit 

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val AddSDs : thm list > unit 

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val AddSEs : thm list > unit 

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val AddSIs : thm list > unit 

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val Delrules : thm list > unit 
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val Safe_tac : tactic 
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val Safe_step_tac : int > tactic 
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val Clarify_tac : int > tactic 
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val Clarify_step_tac : int > tactic 
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val Step_tac : int > tactic 
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val Fast_tac : int > tactic 
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val Best_tac : int > tactic 
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val Slow_tac : int > tactic 
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val Slow_best_tac : int > tactic 

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val Deepen_tac : int > int > tactic 
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end; 
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structure ClasetThyData: CLASET_THY_DATA = 
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struct 
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(* data kind claset  forward declaration *) 
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val clasetK = "claset"; 
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exception ClasetData of object ref; 
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local 
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fun undef _ = raise Match; 
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val empty_ref = ref ERROR; 
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val prep_ext_fn = ref (undef: object > object); 
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val merge_fn = ref (undef: object * object > object); 

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val print_fn = ref (undef: Sign.sg > object > unit); 
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val empty = ClasetData empty_ref; 
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fun prep_ext exn = ! prep_ext_fn exn; 
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fun merge exn = ! merge_fn exn; 
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fun print sg exn = ! print_fn sg exn; 
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in 
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val thy_data = (clasetK, (empty, prep_ext, merge, print)); 
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fun fix_methods (e, ext, mrg, prt) = 
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(empty_ref := e; prep_ext_fn := ext; merge_fn := mrg; print_fn := prt); 
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end; 
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end; 
0  166 

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functor ClassicalFun(Data: CLASSICAL_DATA): CLASSICAL = 

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struct 

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local open ClasetThyData Data in 
0  172 

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(*** Useful tactics for classical reasoning ***) 
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val imp_elim = (*cannot use bind_thm within a structure!*) 
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store_thm ("imp_elim", make_elim mp); 

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4392  178 
(*Prove goal that assumes both P and ~P. 
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No backtracking if it finds an equal assumption. Perhaps should call 

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ematch_tac instead of eresolve_tac, but then cannot prove ZF/cantor.*) 

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val contr_tac = eresolve_tac [not_elim] THEN' 

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(eq_assume_tac ORELSE' assume_tac); 

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(*Finds P>Q and P in the assumptions, replaces implication by Q. 
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Could do the same thing for P<>Q and P... *) 
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fun mp_tac i = eresolve_tac [not_elim, imp_elim] i THEN assume_tac i; 
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(*Like mp_tac but instantiates no variables*) 

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fun eq_mp_tac i = ematch_tac [not_elim, imp_elim] i THEN eq_assume_tac i; 
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1524  191 
val swap = 
192 
store_thm ("swap", rule_by_tactic (etac thin_rl 1) (not_elim RS classical)); 

0  193 

194 
(*Creates rules to eliminate ~A, from rules to introduce A*) 

195 
fun swapify intrs = intrs RLN (2, [swap]); 

196 

197 
(*Uses introduction rules in the normal way, or on negated assumptions, 

198 
trying rules in order. *) 

199 
fun swap_res_tac rls = 

54  200 
let fun addrl (rl,brls) = (false, rl) :: (true, rl RSN (2,swap)) :: brls 
201 
in assume_tac ORELSE' 

202 
contr_tac ORELSE' 

203 
biresolve_tac (foldr addrl (rls,[])) 

0  204 
end; 
205 

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(*Duplication of hazardous rules, for complete provers*) 
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fun dup_intr th = zero_var_indexes (th RS classical); 
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4646  209 
fun dup_elim th = 
210 
th RSN (2, revcut_rl) > assumption 2 > Seq.hd > 

211 
rule_by_tactic (TRYALL (etac revcut_rl)) 

212 
handle _ => error ("Bad format for elimination rule\n" ^ string_of_thm th); 

0  213 

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1800  215 
(**** Classical rule sets ****) 
0  216 

217 
datatype claset = 

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CS of {safeIs : thm list, (*safe introduction rules*) 
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safeEs : thm list, (*safe elimination rules*) 
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hazIs : thm list, (*unsafe introduction rules*) 
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hazEs : thm list, (*unsafe elimination rules*) 
4651  222 
swrappers : (string * wrapper) list, (*for transf. safe_step_tac*) 
223 
uwrappers : (string * wrapper) list, (*for transforming step_tac*) 

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safe0_netpair : netpair, (*nets for trivial cases*) 
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safep_netpair : netpair, (*nets for >0 subgoals*) 
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haz_netpair : netpair, (*nets for unsafe rules*) 
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dup_netpair : netpair}; (*nets for duplication*) 
0  228 

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(*Desired invariants are 
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safe0_netpair = build safe0_brls, 
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safep_netpair = build safep_brls, 
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haz_netpair = build (joinrules(hazIs, hazEs)), 
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dup_netpair = build (joinrules(map dup_intr hazIs, 
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map dup_elim hazEs))} 
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235 

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where build = build_netpair(Net.empty,Net.empty), 
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safe0_brls contains all brules that solve the subgoal, and 
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safep_brls contains all brules that generate 1 or more new subgoals. 
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The theorem lists are largely comments, though they are used in merge_cs and print_cs. 
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Nets must be built incrementally, to save space and time. 
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241 
*) 
0  242 

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val empty_cs = 
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CS{safeIs = [], 
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safeEs = [], 
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hazIs = [], 
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hazEs = [], 
4651  248 
swrappers = [], 
249 
uwrappers = [], 

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safe0_netpair = (Net.empty,Net.empty), 
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safep_netpair = (Net.empty,Net.empty), 
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haz_netpair = (Net.empty,Net.empty), 
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dup_netpair = (Net.empty,Net.empty)}; 
0  254 

3546  255 
fun print_cs (CS {safeIs, safeEs, hazIs, hazEs, ...}) = 
256 
let val pretty_thms = map Display.pretty_thm in 

257 
Pretty.writeln (Pretty.big_list "safe introduction rules:" (pretty_thms safeIs)); 

4624  258 
Pretty.writeln (Pretty.big_list "unsafe introduction rules:" (pretty_thms hazIs)); 
4625  259 
Pretty.writeln (Pretty.big_list "safe elimination rules:" (pretty_thms safeEs)); 
260 
Pretty.writeln (Pretty.big_list "unsafe elimination rules:" (pretty_thms hazEs)) 

3546  261 
end; 
0  262 

4653  263 
fun rep_cs (CS args) = args; 
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4651  265 
local 
266 
fun calc_wrap l tac = foldr (fn ((name,tacf),w) => tacf w) (l, tac); 

267 
in 

268 
fun appSWrappers (CS{swrappers,...}) = calc_wrap swrappers; 

269 
fun appWrappers (CS{uwrappers,...}) = calc_wrap uwrappers; 

270 
end; 

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271 

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1800  273 
(*** Adding (un)safe introduction or elimination rules. 
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In case of overlap, new rules are tried BEFORE old ones!! 
1800  276 
***) 
0  277 

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(*For use with biresolve_tac. Combines intr rules with swap to handle negated 
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assumptions. Pairs elim rules with true. *) 
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fun joinrules (intrs,elims) = 
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(map (pair true) (elims @ swapify intrs) @ 
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map (pair false) intrs); 
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283 

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(*Priority: prefer rules with fewest subgoals, 
1231  285 
then rules added most recently (preferring the head of the list).*) 
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fun tag_brls k [] = [] 
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 tag_brls k (brl::brls) = 
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(1000000*subgoals_of_brl brl + k, brl) :: 
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tag_brls (k+1) brls; 
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290 

1800  291 
fun insert_tagged_list kbrls netpr = foldr insert_tagged_brl (kbrls, netpr); 
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292 

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(*Insert into netpair that already has nI intr rules and nE elim rules. 
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Count the intr rules double (to account for swapify). Negate to give the 
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295 
new insertions the lowest priority.*) 
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fun insert (nI,nE) = insert_tagged_list o (tag_brls (~(2*nI+nE))) o joinrules; 
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297 

1800  298 
fun delete_tagged_list brls netpr = foldr delete_tagged_brl (brls, netpr); 
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299 

1800  300 
val delete = delete_tagged_list o joinrules; 
301 

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val mem_thm = gen_mem eq_thm 
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and rem_thm = gen_rem eq_thm; 
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304 

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(*Warn if the rule is already present ELSEWHERE in the claset. The addition 
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306 
is still allowed.*) 
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fun warn_dup th (CS{safeIs, safeEs, hazIs, hazEs, ...}) = 
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308 
if mem_thm (th, safeIs) then 
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warning ("Rule already in claset as Safe Intr\n" ^ string_of_thm th) 
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else if mem_thm (th, safeEs) then 
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warning ("Rule already in claset as Safe Elim\n" ^ string_of_thm th) 
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else if mem_thm (th, hazIs) then 
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warning ("Rule already in claset as unsafe Intr\n" ^ string_of_thm th) 
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else if mem_thm (th, hazEs) then 
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warning ("Rule already in claset as unsafe Elim\n" ^ string_of_thm th) 
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else (); 
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317 

1800  318 
(*** Safe rules ***) 
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4651  320 
fun addSI (cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
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safe0_netpair, safep_netpair, haz_netpair, dup_netpair}, 
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th) = 
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if mem_thm (th, safeIs) then 
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(warning ("Ignoring duplicate Safe Intr\n" ^ string_of_thm th); 
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cs) 
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else 
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let val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*) 
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partition (fn rl => nprems_of rl=0) [th] 
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val nI = length safeIs + 1 
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and nE = length safeEs 
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in warn_dup th cs; 
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CS{safeIs = th::safeIs, 
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safe0_netpair = insert (nI,nE) (safe0_rls, []) safe0_netpair, 
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safep_netpair = insert (nI,nE) (safep_rls, []) safep_netpair, 
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safeEs = safeEs, 
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hazIs = hazIs, 
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hazEs = hazEs, 
4651  338 
swrappers = swrappers, 
339 
uwrappers = uwrappers, 

2630  340 
haz_netpair = haz_netpair, 
341 
dup_netpair = dup_netpair} 

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end; 
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343 

4651  344 
fun addSE (cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
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safe0_netpair, safep_netpair, haz_netpair, dup_netpair}, 
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th) = 
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347 
if mem_thm (th, safeEs) then 
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(warning ("Ignoring duplicate Safe Elim\n" ^ string_of_thm th); 
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cs) 
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else 
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let val (safe0_rls, safep_rls) = (*0 subgoals vs 1 or more*) 
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partition (fn rl => nprems_of rl=1) [th] 
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val nI = length safeIs 
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and nE = length safeEs + 1 
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in warn_dup th cs; 
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CS{safeEs = th::safeEs, 
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safe0_netpair = insert (nI,nE) ([], safe0_rls) safe0_netpair, 
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safep_netpair = insert (nI,nE) ([], safep_rls) safep_netpair, 
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safeIs = safeIs, 
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hazIs = hazIs, 
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361 
hazEs = hazEs, 
4651  362 
swrappers = swrappers, 
363 
uwrappers = uwrappers, 

2630  364 
haz_netpair = haz_netpair, 
365 
dup_netpair = dup_netpair} 

1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

366 
end; 
0  367 

1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

368 
fun rev_foldl f (e, l) = foldl f (e, rev l); 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

369 

6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

370 
val op addSIs = rev_foldl addSI; 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

371 
val op addSEs = rev_foldl addSE; 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

372 

0  373 
fun cs addSDs ths = cs addSEs (map make_elim ths); 
374 

1073
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Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

375 

1800  376 
(*** Hazardous (unsafe) rules ***) 
0  377 

4651  378 
fun addI (cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

379 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}, 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

380 
th)= 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

381 
if mem_thm (th, hazIs) then 
4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

382 
(warning ("Ignoring duplicate unsafe Intr\n" ^ string_of_thm th); 
1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

383 
cs) 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

384 
else 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

385 
let val nI = length hazIs + 1 
1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

386 
and nE = length hazEs 
1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

387 
in warn_dup th cs; 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

388 
CS{hazIs = th::hazIs, 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

389 
haz_netpair = insert (nI,nE) ([th], []) haz_netpair, 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

390 
dup_netpair = insert (nI,nE) (map dup_intr [th], []) dup_netpair, 
1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

391 
safeIs = safeIs, 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

392 
safeEs = safeEs, 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

393 
hazEs = hazEs, 
4651  394 
swrappers = swrappers, 
395 
uwrappers = uwrappers, 

1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

396 
safe0_netpair = safe0_netpair, 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

397 
safep_netpair = safep_netpair} 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

398 
end; 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

399 

4651  400 
fun addE (cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

401 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}, 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

402 
th) = 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

403 
if mem_thm (th, hazEs) then 
4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

404 
(warning ("Ignoring duplicate unsafe Elim\n" ^ string_of_thm th); 
1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

405 
cs) 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

406 
else 
1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

407 
let val nI = length hazIs 
1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

408 
and nE = length hazEs + 1 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

409 
in warn_dup th cs; 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

410 
CS{hazEs = th::hazEs, 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

411 
haz_netpair = insert (nI,nE) ([], [th]) haz_netpair, 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

412 
dup_netpair = insert (nI,nE) ([], map dup_elim [th]) dup_netpair, 
1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

413 
safeIs = safeIs, 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

414 
safeEs = safeEs, 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

415 
hazIs = hazIs, 
4651  416 
swrappers = swrappers, 
417 
uwrappers = uwrappers, 

1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

418 
safe0_netpair = safe0_netpair, 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

419 
safep_netpair = safep_netpair} 
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

420 
end; 
0  421 

1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

422 
val op addIs = rev_foldl addI; 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

423 
val op addEs = rev_foldl addE; 
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

424 

0  425 
fun cs addDs ths = cs addEs (map make_elim ths); 
426 

1073
b3f190995bc9
Recoded addSIs, etc., so that nets are built incrementally
lcp
parents:
1010
diff
changeset

427 

1800  428 
(*** Deletion of rules 
429 
Working out what to delete, requires repeating much of the code used 

430 
to insert. 

1927
6f97cb16e453
New classical reasoner: warns of, and ignores, redundant rules.
paulson
parents:
1814
diff
changeset

431 
Separate functions delSI, etc., are not exported; instead delrules 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

432 
searches in all the lists and chooses the relevant delXX functions. 
1800  433 
***) 
434 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

435 
fun delSI th 
4651  436 
(cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

437 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) = 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

438 
if mem_thm (th, safeIs) then 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

439 
let val (safe0_rls, safep_rls) = partition (fn rl => nprems_of rl=0) [th] 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

440 
in CS{safe0_netpair = delete (safe0_rls, []) safe0_netpair, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

441 
safep_netpair = delete (safep_rls, []) safep_netpair, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

442 
safeIs = rem_thm (safeIs,th), 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

443 
safeEs = safeEs, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

444 
hazIs = hazIs, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

445 
hazEs = hazEs, 
4651  446 
swrappers = swrappers, 
447 
uwrappers = uwrappers, 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

448 
haz_netpair = haz_netpair, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

449 
dup_netpair = dup_netpair} 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

450 
end 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

451 
else cs; 
1800  452 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

453 
fun delSE th 
4651  454 
(cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

455 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) = 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

456 
if mem_thm (th, safeEs) then 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

457 
let val (safe0_rls, safep_rls) = partition (fn rl => nprems_of rl=1) [th] 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

458 
in CS{safe0_netpair = delete ([], safe0_rls) safe0_netpair, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

459 
safep_netpair = delete ([], safep_rls) safep_netpair, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

460 
safeIs = safeIs, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

461 
safeEs = rem_thm (safeEs,th), 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

462 
hazIs = hazIs, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

463 
hazEs = hazEs, 
4651  464 
swrappers = swrappers, 
465 
uwrappers = uwrappers, 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

466 
haz_netpair = haz_netpair, 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

467 
dup_netpair = dup_netpair} 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

468 
end 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

469 
else cs; 
1800  470 

471 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

472 
fun delI th 
4651  473 
(cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

474 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) = 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

475 
if mem_thm (th, hazIs) then 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

476 
CS{haz_netpair = delete ([th], []) haz_netpair, 
1800  477 
dup_netpair = delete ([dup_intr th], []) dup_netpair, 
478 
safeIs = safeIs, 

479 
safeEs = safeEs, 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

480 
hazIs = rem_thm (hazIs,th), 
1800  481 
hazEs = hazEs, 
4651  482 
swrappers = swrappers, 
483 
uwrappers = uwrappers, 

1800  484 
safe0_netpair = safe0_netpair, 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

485 
safep_netpair = safep_netpair} 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

486 
else cs; 
1800  487 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

488 
fun delE th 
4651  489 
(cs as CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

490 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) = 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

491 
if mem_thm (th, hazEs) then 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

492 
CS{haz_netpair = delete ([], [th]) haz_netpair, 
1800  493 
dup_netpair = delete ([], [dup_elim th]) dup_netpair, 
494 
safeIs = safeIs, 

495 
safeEs = safeEs, 

496 
hazIs = hazIs, 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

497 
hazEs = rem_thm (hazEs,th), 
4651  498 
swrappers = swrappers, 
499 
uwrappers = uwrappers, 

1800  500 
safe0_netpair = safe0_netpair, 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

501 
safep_netpair = safep_netpair} 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

502 
else cs; 
1800  503 

2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

504 
(*Delete ALL occurrences of "th" in the claset (perhaps from several lists)*) 
1800  505 
fun delrule (cs as CS{safeIs, safeEs, hazIs, hazEs, ...}, th) = 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

506 
if mem_thm (th, safeIs) orelse mem_thm (th, safeEs) orelse 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

507 
mem_thm (th, hazIs) orelse mem_thm (th, hazEs) 
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

508 
then delSI th (delSE th (delI th (delE th cs))) 
4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

509 
else (warning ("Rule not in claset\n" ^ (string_of_thm th)); 
2813
cc4c816dafdc
delrules now deletes ALL occurrences of a rule, since it may appear in any of
paulson
parents:
2689
diff
changeset

510 
cs); 
1800  511 

512 
val op delrules = foldl delrule; 

513 

514 

4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

515 
(*** Modifying the wrapper tacticals ***) 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

516 
fun update_swrappers 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

517 
(CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

518 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) f = 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

519 
CS{safeIs = safeIs, safeEs = safeEs, hazIs = hazIs, hazEs = hazEs, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

520 
swrappers = f swrappers, uwrappers = uwrappers, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

521 
safe0_netpair = safe0_netpair, safep_netpair = safep_netpair, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

522 
haz_netpair = haz_netpair, dup_netpair = dup_netpair}; 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

523 

b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

524 
fun update_uwrappers 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

525 
(CS{safeIs, safeEs, hazIs, hazEs, swrappers, uwrappers, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

526 
safe0_netpair, safep_netpair, haz_netpair, dup_netpair}) f = 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

527 
CS{safeIs = safeIs, safeEs = safeEs, hazIs = hazIs, hazEs = hazEs, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

528 
swrappers = swrappers, uwrappers = f uwrappers, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

529 
safe0_netpair = safe0_netpair, safep_netpair = safep_netpair, 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

530 
haz_netpair = haz_netpair, dup_netpair = dup_netpair}; 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

531 

982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

532 

4651  533 
(*Add/replace a safe wrapper*) 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

534 
fun cs addSWrapper new_swrapper = update_swrappers cs (fn swrappers => 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

535 
(case assoc_string (swrappers,(fst new_swrapper)) of None =>() 
4651  536 
 Some x => warning("overwriting safe wrapper "^fst new_swrapper); 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

537 
overwrite (swrappers, new_swrapper))); 
4651  538 

539 
(*Add/replace an unsafe wrapper*) 

4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

540 
fun cs addWrapper new_uwrapper = update_uwrappers cs (fn uwrappers => 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

541 
(case assoc_string (uwrappers,(fst new_uwrapper)) of None =>() 
4651  542 
 Some x => warning ("overwriting unsafe wrapper "^fst new_uwrapper); 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

543 
overwrite (uwrappers, new_uwrapper))); 
982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

544 

4651  545 
(*Remove a safe wrapper*) 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

546 
fun cs delSWrapper name = update_swrappers cs (fn swrappers => 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

547 
let val (del,rest) = partition (fn (n,_) => n=name) swrappers 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

548 
in if null del then (warning ("No such safe wrapper in claset: "^ name); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

549 
swrappers) else rest end); 
982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

550 

4651  551 
(*Remove an unsafe wrapper*) 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

552 
fun cs delWrapper name = update_uwrappers cs (fn uwrappers => 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

553 
let val (del,rest) = partition (fn (n,_) => n=name) uwrappers 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

554 
in if null del then (warning ("No such unsafe wrapper in claset: " ^ name); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

555 
uwrappers) else rest end); 
982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

556 

2630  557 
(*compose a safe tactic sequentially before/alternatively after safe_step_tac*) 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

558 
fun cs addSbefore (name, tac1) = 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

559 
cs addSWrapper (name, fn tac2 => tac1 THEN_MAYBE' tac2); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

560 
fun cs addSaltern (name, tac2) = 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

561 
cs addSWrapper (name, fn tac1 => tac1 ORELSE' tac2); 
982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

562 

2630  563 
(*compose a tactic sequentially before/alternatively after the step tactic*) 
4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

564 
fun cs addbefore (name, tac1) = 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

565 
cs addWrapper (name, fn tac2 => tac1 THEN_MAYBE' tac2); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

566 
fun cs addaltern (name, tac2) = 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

567 
cs addWrapper (name, fn tac1 => tac1 APPEND' tac2); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

568 

982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

569 

1711  570 
(*Merge works by adding all new rules of the 2nd claset into the 1st claset. 
571 
Merging the term nets may look more efficient, but the rather delicate 

572 
treatment of priority might get muddled up.*) 

573 
fun merge_cs 

2630  574 
(cs as CS{safeIs, safeEs, hazIs, hazEs, ...}, 
4765  575 
CS{safeIs=safeIs2, safeEs=safeEs2, hazIs=hazIs2, hazEs=hazEs2, 
576 
swrappers, uwrappers, ...}) = 

1711  577 
let val safeIs' = gen_rems eq_thm (safeIs2,safeIs) 
578 
val safeEs' = gen_rems eq_thm (safeEs2,safeEs) 

2630  579 
val hazIs' = gen_rems eq_thm ( hazIs2, hazIs) 
580 
val hazEs' = gen_rems eq_thm ( hazEs2, hazEs) 

4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

581 
val cs1 = cs addSIs safeIs' 
4765  582 
addSEs safeEs' 
583 
addIs hazIs' 

584 
addEs hazEs' 

4767
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

585 
val cs2 = update_swrappers cs1 (fn ws => merge_alists ws swrappers); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

586 
val cs3 = update_uwrappers cs2 (fn ws => merge_alists ws uwrappers); 
b9f3468c6ee2
introduced functions for updating the wrapper lists
oheimb
parents:
4765
diff
changeset

587 
in cs3 
1711  588 
end; 
589 

982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

590 

1800  591 
(**** Simple tactics for theorem proving ****) 
0  592 

593 
(*Attack subgoals using safe inferences  matching, not resolution*) 

2630  594 
fun safe_step_tac (cs as CS{safe0_netpair,safep_netpair,...}) = 
4651  595 
appSWrappers cs (FIRST' [ 
2630  596 
eq_assume_tac, 
597 
eq_mp_tac, 

598 
bimatch_from_nets_tac safe0_netpair, 

599 
FIRST' hyp_subst_tacs, 

600 
bimatch_from_nets_tac safep_netpair]); 

0  601 

602 
(*Repeatedly attack subgoals using safe inferences  it's deterministic!*) 

2630  603 
fun safe_tac cs = REPEAT_DETERM_FIRST 
604 
(fn i => COND (has_fewer_prems i) no_tac (safe_step_tac cs i)); 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

605 

3705
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

606 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

607 
(*** Clarify_tac: do safe steps without causing branching ***) 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

608 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

609 
fun nsubgoalsP n (k,brl) = (subgoals_of_brl brl = n); 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

610 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

611 
(*version of bimatch_from_nets_tac that only applies rules that 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

612 
create precisely n subgoals.*) 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

613 
fun n_bimatch_from_nets_tac n = 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

614 
biresolution_from_nets_tac (orderlist o filter (nsubgoalsP n)) true; 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

615 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

616 
fun eq_contr_tac i = ematch_tac [not_elim] i THEN eq_assume_tac i; 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

617 
val eq_assume_contr_tac = eq_assume_tac ORELSE' eq_contr_tac; 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

618 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

619 
(*Twoway branching is allowed only if one of the branches immediately closes*) 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

620 
fun bimatch2_tac netpair i = 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

621 
n_bimatch_from_nets_tac 2 netpair i THEN 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

622 
(eq_assume_contr_tac i ORELSE eq_assume_contr_tac (i+1)); 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

623 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

624 
(*Attack subgoals using safe inferences  matching, not resolution*) 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

625 
fun clarify_step_tac (cs as CS{safe0_netpair,safep_netpair,...}) = 
4651  626 
appSWrappers cs (FIRST' [ 
3705
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

627 
eq_assume_contr_tac, 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

628 
bimatch_from_nets_tac safe0_netpair, 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

629 
FIRST' hyp_subst_tacs, 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

630 
n_bimatch_from_nets_tac 1 safep_netpair, 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

631 
bimatch2_tac safep_netpair]); 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

632 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

633 
fun clarify_tac cs = SELECT_GOAL (REPEAT_DETERM (clarify_step_tac cs 1)); 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

634 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

635 

76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

636 
(*** Unsafe steps instantiate variables or lose information ***) 
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

637 

4066  638 
(*Backtracking is allowed among the various these unsafe ways of 
639 
proving a subgoal. *) 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

640 
fun inst0_step_tac (CS{safe0_netpair,safep_netpair,...}) = 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

641 
assume_tac APPEND' 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

642 
contr_tac APPEND' 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

643 
biresolve_from_nets_tac safe0_netpair; 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

644 

4066  645 
(*These unsafe steps could generate more subgoals.*) 
747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

646 
fun instp_step_tac (CS{safep_netpair,...}) = 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

647 
biresolve_from_nets_tac safep_netpair; 
0  648 

649 
(*These steps could instantiate variables and are therefore unsafe.*) 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

650 
fun inst_step_tac cs = inst0_step_tac cs APPEND' instp_step_tac cs; 
0  651 

982
4fe0b642b7d5
Addition of wrappers for integration with the simplifier.
lcp
parents:
747
diff
changeset

652 
fun haz_step_tac (CS{haz_netpair,...}) = 
681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

653 
biresolve_from_nets_tac haz_netpair; 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

654 

0  655 
(*Single step for the prover. FAILS unless it makes progress. *) 
4651  656 
fun step_tac cs i = appWrappers cs 
2630  657 
(K (safe_tac cs) ORELSE' (inst_step_tac cs ORELSE' haz_step_tac cs)) i; 
0  658 

659 
(*Using a "safe" rule to instantiate variables is unsafe. This tactic 

660 
allows backtracking from "safe" rules to "unsafe" rules here.*) 

4651  661 
fun slow_step_tac cs i = appWrappers cs 
2630  662 
(K (safe_tac cs) ORELSE' (inst_step_tac cs APPEND' haz_step_tac cs)) i; 
0  663 

1800  664 
(**** The following tactics all fail unless they solve one goal ****) 
0  665 

666 
(*Dumb but fast*) 

667 
fun fast_tac cs = SELECT_GOAL (DEPTH_SOLVE (step_tac cs 1)); 

668 

669 
(*Slower but smarter than fast_tac*) 

670 
fun best_tac cs = 

671 
SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, sizef) (step_tac cs 1)); 

672 

673 
fun slow_tac cs = SELECT_GOAL (DEPTH_SOLVE (slow_step_tac cs 1)); 

674 

675 
fun slow_best_tac cs = 

676 
SELECT_GOAL (BEST_FIRST (has_fewer_prems 1, sizef) (slow_step_tac cs 1)); 

677 

681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

678 

1800  679 
(***ASTAR with weight weight_ASTAR, by Norbert Voelker*) 
1587
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

680 
val weight_ASTAR = ref 5; 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

681 

e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

682 
fun astar_tac cs = 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

683 
SELECT_GOAL ( ASTAR (has_fewer_prems 1 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

684 
, fn level =>(fn thm =>size_of_thm thm + !weight_ASTAR *level)) 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

685 
(step_tac cs 1)); 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

686 

e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

687 
fun slow_astar_tac cs = 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

688 
SELECT_GOAL ( ASTAR (has_fewer_prems 1 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

689 
, fn level =>(fn thm =>size_of_thm thm + !weight_ASTAR *level)) 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

690 
(slow_step_tac cs 1)); 
e7d8a4957bac
Now provides astar versions (thanks to Norbert Voelker)
paulson
parents:
1524
diff
changeset

691 

1800  692 
(**** Complete tactic, loosely based upon LeanTaP. This tactic is the outcome 
747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

693 
of much experimentation! Changing APPEND to ORELSE below would prove 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

694 
easy theorems faster, but loses completeness  and many of the harder 
1800  695 
theorems such as 43. ****) 
681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

696 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

697 
(*Nondeterministic! Could always expand the first unsafe connective. 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

698 
That's hard to implement and did not perform better in experiments, due to 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

699 
greater search depth required.*) 
681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

700 
fun dup_step_tac (cs as (CS{dup_netpair,...})) = 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

701 
biresolve_from_nets_tac dup_netpair; 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

702 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

703 
(*Searching to depth m.*) 
3537  704 
fun depth_tac cs m i state = 
747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

705 
SELECT_GOAL 
4651  706 
(appWrappers cs 
3204
c1653e2e146d
corrected depth_tac: no call for safe_step_tac if subgoal not present
oheimb
parents:
2868
diff
changeset

707 
(fn i => REPEAT_DETERM1 (COND (has_fewer_prems i) no_tac 
c1653e2e146d
corrected depth_tac: no call for safe_step_tac if subgoal not present
oheimb
parents:
2868
diff
changeset

708 
(safe_step_tac cs i)) THEN_ELSE 
2630  709 
(DEPTH_SOLVE (depth_tac cs m i), 
710 
inst0_step_tac cs i APPEND 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

711 
COND (K(m=0)) no_tac 
2630  712 
((instp_step_tac cs i APPEND dup_step_tac cs i) 
713 
THEN DEPTH_SOLVE (depth_tac cs (m1) i)))) 1) 

3537  714 
i state; 
747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

715 

2173  716 
(*Search, with depth bound m. 
717 
This is the "entry point", which does safe inferences first.*) 

747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

718 
fun safe_depth_tac cs m = 
681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

719 
SUBGOAL 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

720 
(fn (prem,i) => 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

721 
let val deti = 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

722 
(*No Vars in the goal? No need to backtrack between goals.*) 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

723 
case term_vars prem of 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

724 
[] => DETERM 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

725 
 _::_ => I 
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

726 
in SELECT_GOAL (TRY (safe_tac cs) THEN 
747
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

727 
DEPTH_SOLVE (deti (depth_tac cs m 1))) i 
bdc066781063
deepen_tac: modified due to outcome of experiments. Its
lcp
parents:
681
diff
changeset

728 
end); 
681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

729 

2868
17a23a62f82a
New DEEPEN allows giving an upper bound for deepen_tac
paulson
parents:
2813
diff
changeset

730 
fun deepen_tac cs = DEEPEN (2,10) (safe_depth_tac cs); 
681
9b02474744ca
Provers/classical: now takes theorem "classical" as argument, proves "swap"
lcp
parents:
469
diff
changeset

731 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

732 

1724  733 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

734 
(** claset theory data **) 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

735 

9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

736 
(* init data kind claset *) 
1724  737 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

738 
exception CSData of claset ref; 
1724  739 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

740 
local 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

741 
val empty = CSData (ref empty_cs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

742 

9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

743 
(*create new references*) 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

744 
fun prep_ext (ClasetData (ref (CSData (ref cs)))) = 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

745 
ClasetData (ref (CSData (ref cs))); 
1724  746 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

747 
fun merge (ClasetData (ref (CSData (ref cs1))), ClasetData (ref (CSData (ref cs2)))) = 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

748 
ClasetData (ref (CSData (ref (merge_cs (cs1, cs2))))); 
1724  749 

4259  750 
fun print (_: Sign.sg) (ClasetData (ref (CSData (ref cs)))) = print_cs cs; 
4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

751 
in 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

752 
val _ = fix_methods (empty, prep_ext, merge, print); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

753 
end; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

754 

1724  755 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

756 
(* access claset *) 
1724  757 

4380  758 
fun print_claset thy = Display.print_data thy clasetK; 
759 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

760 
fun claset_ref_of_sg sg = 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

761 
(case Sign.get_data sg clasetK of 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

762 
ClasetData (ref (CSData r)) => r 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

763 
 _ => sys_error "claset_ref_of_sg"); 
1807  764 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

765 
val claset_ref_of = claset_ref_of_sg o sign_of; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

766 
val claset_of_sg = ! o claset_ref_of_sg; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

767 
val claset_of = claset_of_sg o sign_of; 
1800  768 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

769 
fun CLASET tacf state = tacf (claset_of_sg (sign_of_thm state)) state; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

770 
fun CLASET' tacf i state = tacf (claset_of_sg (sign_of_thm state)) i state; 
3705
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

771 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

772 
val claset = claset_of o Context.get_context; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

773 
val claset_ref = claset_ref_of_sg o sign_of o Context.get_context; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

774 

3705
76f3b2803982
Addition of clarify_tac, clarify_step_tac, Clarify_tac, Clarify_step_tac
paulson
parents:
3546
diff
changeset

775 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

776 
(* change claset *) 
1800  777 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

778 
fun change_claset f x = claset_ref () := (f (claset (), x)); 
1724  779 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

780 
val AddDs = change_claset (op addDs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

781 
val AddEs = change_claset (op addEs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

782 
val AddIs = change_claset (op addIs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

783 
val AddSDs = change_claset (op addSDs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

784 
val AddSEs = change_claset (op addSEs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

785 
val AddSIs = change_claset (op addSIs); 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

786 
val Delrules = change_claset (op delrules); 
3727
ed63c05d7992
Added Safe_tac; all other default claset tactics now dereference "claset"
paulson
parents:
3705
diff
changeset

787 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

788 

9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

789 
(* tactics referring to the implicit claset *) 
1800  790 

4079
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

791 
(*the abstraction over the proof state delays the dereferencing*) 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

792 
fun Safe_tac st = safe_tac (claset()) st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

793 
fun Safe_step_tac i st = safe_step_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

794 
fun Clarify_step_tac i st = clarify_step_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

795 
fun Clarify_tac i st = clarify_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

796 
fun Step_tac i st = step_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

797 
fun Fast_tac i st = fast_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

798 
fun Best_tac i st = best_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

799 
fun Slow_tac i st = slow_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

800 
fun Slow_best_tac i st = slow_best_tac (claset()) i st; 
9df5e4f22d96
new implicit claset mechanism based on Sign.sg anytype data;
wenzelm
parents:
4066
diff
changeset

801 
fun Deepen_tac m = deepen_tac (claset()) m; 
2066  802 

1800  803 

0  804 
end; 
805 
end; 