wenzelm@9772
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(* Title: Provers/clasimp.ML
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oheimb@4652
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ID: $Id$
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oheimb@4652
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Author: David von Oheimb, TU Muenchen
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oheimb@4652
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wenzelm@5219
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Combination of classical reasoner and simplifier (depends on
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wenzelm@16019
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splitter.ML, classical.ML, blast.ML).
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oheimb@4652
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*)
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oheimb@4652
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wenzelm@9860
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infix 4 addSIs2 addSEs2 addSDs2 addIs2 addEs2 addDs2 addsimps2 delsimps2
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berghofe@13603
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addSss addss addss' addIffs delIffs;
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oheimb@4652
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wenzelm@5219
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signature CLASIMP_DATA =
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sig
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structure Simplifier: SIMPLIFIER
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wenzelm@8469
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structure Splitter: SPLITTER
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wenzelm@5219
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structure Classical: CLASSICAL
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wenzelm@5219
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structure Blast: BLAST
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wenzelm@5219
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sharing type Classical.claset = Blast.claset
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wenzelm@9860
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val notE: thm
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wenzelm@9860
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val iffD1: thm
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wenzelm@9860
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val iffD2: thm
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wenzelm@9860
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val cla_make_elim: thm -> thm
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end
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wenzelm@5219
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oheimb@4652
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signature CLASIMP =
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sig
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include CLASIMP_DATA
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type claset
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type simpset
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type clasimpset
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val clasimpset: unit -> clasimpset
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val addSIs2: clasimpset * thm list -> clasimpset
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wenzelm@9860
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val addSEs2: clasimpset * thm list -> clasimpset
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wenzelm@9860
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val addSDs2: clasimpset * thm list -> clasimpset
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wenzelm@9860
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val addIs2: clasimpset * thm list -> clasimpset
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wenzelm@9860
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val addEs2: clasimpset * thm list -> clasimpset
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val addDs2: clasimpset * thm list -> clasimpset
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wenzelm@9860
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val addsimps2: clasimpset * thm list -> clasimpset
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val delsimps2: clasimpset * thm list -> clasimpset
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val addSss: claset * simpset -> claset
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wenzelm@9860
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val addss: claset * simpset -> claset
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berghofe@13603
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val addss': claset * simpset -> claset
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wenzelm@9860
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val addIffs: clasimpset * thm list -> clasimpset
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val delIffs: clasimpset * thm list -> clasimpset
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val AddIffs: thm list -> unit
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val DelIffs: thm list -> unit
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val CLASIMPSET: (clasimpset -> tactic) -> tactic
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val CLASIMPSET': (clasimpset -> 'a -> tactic) -> 'a -> tactic
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oheimb@5483
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val clarsimp_tac: clasimpset -> int -> tactic
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wenzelm@9860
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val Clarsimp_tac: int -> tactic
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val mk_auto_tac: clasimpset -> int -> int -> tactic
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val auto_tac: clasimpset -> tactic
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val Auto_tac: tactic
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val auto: unit -> unit
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val force_tac: clasimpset -> int -> tactic
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val Force_tac: int -> tactic
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val force: int -> unit
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val fast_simp_tac: clasimpset -> int -> tactic
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val slow_simp_tac: clasimpset -> int -> tactic
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val best_simp_tac: clasimpset -> int -> tactic
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wenzelm@8639
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val change_global_css: (clasimpset * thm list -> clasimpset) -> theory attribute
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wenzelm@8639
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val change_local_css: (clasimpset * thm list -> clasimpset) -> Proof.context attribute
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wenzelm@9506
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val get_local_clasimpset: Proof.context -> clasimpset
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wenzelm@15032
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val local_clasimpset_of: Proof.context -> clasimpset
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wenzelm@9860
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val iff_add_global: theory attribute
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wenzelm@10033
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val iff_add_global': theory attribute
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wenzelm@9860
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val iff_del_global: theory attribute
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val iff_add_local: Proof.context attribute
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wenzelm@10033
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val iff_add_local': Proof.context attribute
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val iff_del_local: Proof.context attribute
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wenzelm@9860
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val iff_modifiers: (Args.T list -> (Method.modifier * Args.T list)) list
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wenzelm@9506
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val clasimp_modifiers: (Args.T list -> (Method.modifier * Args.T list)) list
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wenzelm@9860
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val setup: (theory -> theory) list
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oheimb@4652
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end;
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oheimb@4652
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wenzelm@5219
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functor ClasimpFun(Data: CLASIMP_DATA): CLASIMP =
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struct
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open Data;
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type claset = Classical.claset;
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type simpset = Simplifier.simpset;
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type clasimpset = claset * simpset;
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wenzelm@5219
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wenzelm@10317
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fun clasimpset () = (Classical.claset (), Simplifier.simpset ());
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(* clasimpset operations *)
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(*this interface for updating a clasimpset is rudimentary and just for
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wenzelm@5219
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convenience for the most common cases*)
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wenzelm@5219
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wenzelm@5219
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fun pair_upd1 f ((a,b),x) = (f(a,x), b);
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fun pair_upd2 f ((a,b),x) = (a, f(b,x));
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fun op addSIs2 arg = pair_upd1 Classical.addSIs arg;
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fun op addSEs2 arg = pair_upd1 Classical.addSEs arg;
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fun op addSDs2 arg = pair_upd1 Classical.addSDs arg;
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wenzelm@5219
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fun op addIs2 arg = pair_upd1 Classical.addIs arg;
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fun op addEs2 arg = pair_upd1 Classical.addEs arg;
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fun op addDs2 arg = pair_upd1 Classical.addDs arg;
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wenzelm@5219
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fun op addsimps2 arg = pair_upd2 Simplifier.addsimps arg;
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wenzelm@5219
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fun op delsimps2 arg = pair_upd2 Simplifier.delsimps arg;
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oheimb@4652
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oheimb@9402
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(*not totally safe: may instantiate unknowns that appear also in other subgoals*)
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oheimb@9402
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val safe_asm_full_simp_tac = Simplifier.generic_simp_tac true (true,true,true);
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oheimb@9402
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oheimb@4652
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(*Add a simpset to a classical set!*)
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oheimb@4652
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(*Caution: only one simpset added can be added by each of addSss and addss*)
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oheimb@11181
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fun cs addSss ss = Classical.addSafter (cs, ("safe_asm_full_simp_tac",
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wenzelm@9772
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CHANGED o safe_asm_full_simp_tac ss));
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fun cs addss ss = Classical.addbefore (cs, ("asm_full_simp_tac",
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CHANGED o Simplifier.asm_full_simp_tac ss));
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berghofe@13603
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fun cs addss' ss = Classical.addbefore (cs, ("asm_full_simp_tac",
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berghofe@13603
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CHANGED o Simplifier.asm_lr_simp_tac ss));
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oheimb@4652
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paulson@17084
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(*Attach a suffix, provided we have a name to start with.*)
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paulson@17084
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fun suffix_thm "" _ th = th
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paulson@17084
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| suffix_thm a b th = Thm.name_thm (a^b, th);
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wenzelm@9860
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wenzelm@9860
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(* iffs: addition of rules to simpsets and clasets simultaneously *)
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wenzelm@9860
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oheimb@11344
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(*Takes (possibly conditional) theorems of the form A<->B to
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wenzelm@9860
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the Safe Intr rule B==>A and
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wenzelm@9860
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the Safe Destruct rule A==>B.
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wenzelm@9860
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Also ~A goes to the Safe Elim rule A ==> ?R
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paulson@11462
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Failing other cases, A is added as a Safe Intr rule*)
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wenzelm@9860
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local
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wenzelm@9860
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wenzelm@13026
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fun addIff decls1 decls2 simp ((cs, ss), th) =
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wenzelm@13026
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let
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paulson@17084
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val name = Thm.name_of_thm th;
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wenzelm@13026
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val n = nprems_of th;
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paulson@17084
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val (elim, intro) = if n = 0 then decls1 else decls2;
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wenzelm@13026
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val zero_rotate = zero_var_indexes o rotate_prems n;
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wenzelm@13026
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in
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paulson@17084
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(elim (intro (cs, [suffix_thm name "_iff2" (zero_rotate (th RS Data.iffD2))]),
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paulson@17084
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[suffix_thm name "_iff1" (Data.cla_make_elim (zero_rotate (th RS Data.iffD1)))])
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paulson@17084
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handle THM _ => (elim (cs, [suffix_thm name "_iff" (zero_rotate (th RS Data.notE))])
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wenzelm@11902
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handle THM _ => intro (cs, [th])),
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wenzelm@11902
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simp (ss, [th]))
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wenzelm@11902
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end;
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wenzelm@9860
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wenzelm@12375
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fun delIff delcs delss ((cs, ss), th) =
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wenzelm@11902
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let val zero_rotate = zero_var_indexes o rotate_prems (nprems_of th) in
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wenzelm@12375
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(delcs (cs, [zero_rotate (th RS Data.iffD2),
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wenzelm@11902
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Data.cla_make_elim (zero_rotate (th RS Data.iffD1))])
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wenzelm@12375
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handle THM _ => (delcs (cs, [zero_rotate (th RS Data.notE)])
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wenzelm@12375
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handle THM _ => delcs (cs, [th])),
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delss (ss, [th]))
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wenzelm@11902
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end;
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wenzelm@9860
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wenzelm@10033
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fun store_clasimp (cs, ss) =
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(Classical.claset_ref () := cs; Simplifier.simpset_ref () := ss);
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in
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wenzelm@9860
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wenzelm@10033
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val op addIffs =
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paulson@17084
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Library.foldl
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paulson@17084
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(addIff (Classical.addSEs, Classical.addSIs)
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paulson@17084
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(Classical.addEs, Classical.addIs)
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Simplifier.addsimps);
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skalberg@15570
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val op delIffs = Library.foldl (delIff Classical.delrules Simplifier.delsimps);
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wenzelm@10033
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wenzelm@10317
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fun AddIffs thms = store_clasimp (clasimpset () addIffs thms);
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wenzelm@10317
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fun DelIffs thms = store_clasimp (clasimpset () delIffs thms);
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wenzelm@9860
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wenzelm@12375
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fun addIffs_global (thy, ths) =
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skalberg@15570
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Library.foldl (addIff
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paulson@17084
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(ContextRules.addXEs_global, ContextRules.addXIs_global)
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paulson@17084
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(ContextRules.addXEs_global, ContextRules.addXIs_global) #1)
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wenzelm@13026
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((thy, ()), ths) |> #1;
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wenzelm@12375
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wenzelm@12375
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fun addIffs_local (ctxt, ths) =
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skalberg@15570
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Library.foldl (addIff
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paulson@17084
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(ContextRules.addXEs_local, ContextRules.addXIs_local)
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paulson@17084
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(ContextRules.addXEs_local, ContextRules.addXIs_local) #1)
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wenzelm@13026
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((ctxt, ()), ths) |> #1;
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wenzelm@12375
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wenzelm@12375
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fun delIffs_global (thy, ths) =
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skalberg@15570
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Library.foldl (delIff ContextRules.delrules_global #1) ((thy, ()), ths) |> #1;
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wenzelm@12375
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wenzelm@12375
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fun delIffs_local (ctxt, ths) =
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skalberg@15570
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Library.foldl (delIff ContextRules.delrules_local #1) ((ctxt, ()), ths) |> #1;
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wenzelm@12375
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wenzelm@9860
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end;
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wenzelm@9860
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wenzelm@5219
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(* tacticals *)
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wenzelm@4888
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wenzelm@5219
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fun CLASIMPSET tacf state =
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wenzelm@5219
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Classical.CLASET (fn cs => Simplifier.SIMPSET (fn ss => tacf (cs, ss))) state;
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wenzelm@4888
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wenzelm@5219
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fun CLASIMPSET' tacf i state =
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wenzelm@5219
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Classical.CLASET (fn cs => Simplifier.SIMPSET (fn ss => tacf (cs, ss) i)) state;
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oheimb@4652
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oheimb@4652
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wenzelm@12375
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fun clarsimp_tac (cs, ss) =
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wenzelm@12375
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safe_asm_full_simp_tac ss THEN_ALL_NEW
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wenzelm@12375
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Classical.clarify_tac (cs addSss ss);
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wenzelm@12375
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wenzelm@10317
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fun Clarsimp_tac i = clarsimp_tac (clasimpset ()) i;
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oheimb@5483
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oheimb@5483
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wenzelm@5219
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(* auto_tac *)
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oheimb@4652
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wenzelm@5219
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fun blast_depth_tac cs m i thm =
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wenzelm@9772
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Blast.depth_tac cs m i thm
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oheimb@5554
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handle Blast.TRANS s => (warning ("Blast_tac: " ^ s); Seq.empty);
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wenzelm@9772
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wenzelm@9772
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(* a variant of depth_tac that avoids interference of the simplifier
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wenzelm@5219
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with dup_step_tac when they are combined by auto_tac *)
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oheimb@5756
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local
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wenzelm@9772
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fun slow_step_tac' cs = Classical.appWrappers cs
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wenzelm@9772
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(Classical.instp_step_tac cs APPEND' Classical.haz_step_tac cs);
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wenzelm@9772
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in fun nodup_depth_tac cs m i state = SELECT_GOAL
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wenzelm@9772
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(Classical.safe_steps_tac cs 1 THEN_ELSE
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wenzelm@9772
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(DEPTH_SOLVE (nodup_depth_tac cs m 1),
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wenzelm@9772
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Classical.inst0_step_tac cs 1 APPEND COND (K (m=0)) no_tac
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wenzelm@9772
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(slow_step_tac' cs 1 THEN DEPTH_SOLVE (nodup_depth_tac cs (m-1) 1))
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oheimb@5756
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)) i state;
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oheimb@5756
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end;
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oheimb@4652
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oheimb@9402
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(*Designed to be idempotent, except if blast_depth_tac instantiates variables
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oheimb@4652
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in some of the subgoals*)
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oheimb@4652
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fun mk_auto_tac (cs, ss) m n =
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wenzelm@5219
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let val cs' = cs addss ss
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wenzelm@9772
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val maintac =
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wenzelm@9772
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blast_depth_tac cs m (* fast but can't use wrappers *)
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oheimb@4652
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ORELSE'
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oheimb@5756
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(CHANGED o nodup_depth_tac cs' n); (* slower but more general *)
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wenzelm@5219
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in EVERY [ALLGOALS (Simplifier.asm_full_simp_tac ss),
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wenzelm@9772
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TRY (Classical.safe_tac cs),
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wenzelm@9772
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REPEAT (FIRSTGOAL maintac),
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wenzelm@5219
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TRY (Classical.safe_tac (cs addSss ss)),
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wenzelm@9772
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prune_params_tac]
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oheimb@4652
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end;
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oheimb@4652
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wenzelm@9772
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fun auto_tac css = mk_auto_tac css 4 2;
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wenzelm@10317
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fun Auto_tac st = auto_tac (clasimpset ()) st;
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oheimb@4652
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fun auto () = by Auto_tac;
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oheimb@4652
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wenzelm@9772
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wenzelm@5219
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(* force_tac *)
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wenzelm@5219
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oheimb@4659
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(* aimed to solve the given subgoal totally, using whatever tools possible *)
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oheimb@4717
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fun force_tac (cs,ss) = let val cs' = cs addss ss in SELECT_GOAL (EVERY [
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wenzelm@9772
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Classical.clarify_tac cs' 1,
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wenzelm@9772
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IF_UNSOLVED (Simplifier.asm_full_simp_tac ss 1),
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wenzelm@9772
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ALLGOALS (Classical.first_best_tac cs')]) end;
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wenzelm@10317
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fun Force_tac i = force_tac (clasimpset ()) i;
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oheimb@4717
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fun force i = by (Force_tac i);
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oheimb@4659
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wenzelm@5219
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wenzelm@9805
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(* basic combinations *)
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wenzelm@9591
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wenzelm@9805
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fun ADDSS tac (cs, ss) = let val cs' = cs addss ss in tac cs' end;
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wenzelm@9805
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wenzelm@9805
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val fast_simp_tac = ADDSS Classical.fast_tac;
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wenzelm@9805
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260 |
val slow_simp_tac = ADDSS Classical.slow_tac;
|
wenzelm@9805
|
261 |
val best_simp_tac = ADDSS Classical.best_tac;
|
wenzelm@9591
|
262 |
|
wenzelm@9591
|
263 |
|
wenzelm@9860
|
264 |
(* access clasimpset *)
|
wenzelm@8639
|
265 |
|
wenzelm@8639
|
266 |
fun change_global_css f (thy, th) =
|
wenzelm@8639
|
267 |
let
|
wenzelm@8639
|
268 |
val cs_ref = Classical.claset_ref_of thy;
|
wenzelm@8639
|
269 |
val ss_ref = Simplifier.simpset_ref_of thy;
|
wenzelm@8639
|
270 |
val (cs', ss') = f ((! cs_ref, ! ss_ref), [th]);
|
wenzelm@8639
|
271 |
in cs_ref := cs'; ss_ref := ss'; (thy, th) end;
|
wenzelm@8639
|
272 |
|
wenzelm@8639
|
273 |
fun change_local_css f (ctxt, th) =
|
wenzelm@8639
|
274 |
let
|
wenzelm@8639
|
275 |
val cs = Classical.get_local_claset ctxt;
|
wenzelm@8639
|
276 |
val ss = Simplifier.get_local_simpset ctxt;
|
wenzelm@8639
|
277 |
val (cs', ss') = f ((cs, ss), [th]);
|
wenzelm@8639
|
278 |
val ctxt' =
|
wenzelm@8639
|
279 |
ctxt
|
wenzelm@8639
|
280 |
|> Classical.put_local_claset cs'
|
wenzelm@8639
|
281 |
|> Simplifier.put_local_simpset ss';
|
wenzelm@8639
|
282 |
in (ctxt', th) end;
|
wenzelm@8639
|
283 |
|
wenzelm@7153
|
284 |
fun get_local_clasimpset ctxt =
|
wenzelm@7153
|
285 |
(Classical.get_local_claset ctxt, Simplifier.get_local_simpset ctxt);
|
wenzelm@5926
|
286 |
|
wenzelm@15032
|
287 |
fun local_clasimpset_of ctxt =
|
wenzelm@15032
|
288 |
(Classical.local_claset_of ctxt, Simplifier.local_simpset_of ctxt);
|
wenzelm@15032
|
289 |
|
wenzelm@9860
|
290 |
|
wenzelm@9860
|
291 |
(* attributes *)
|
wenzelm@9860
|
292 |
|
wenzelm@12375
|
293 |
fun change_rules f (x, th) = (f (x, [th]), th);
|
wenzelm@12375
|
294 |
|
wenzelm@9860
|
295 |
val iff_add_global = change_global_css (op addIffs);
|
wenzelm@12375
|
296 |
val iff_add_global' = change_rules addIffs_global;
|
wenzelm@12375
|
297 |
val iff_del_global = change_global_css (op delIffs) o change_rules delIffs_global;
|
wenzelm@9860
|
298 |
val iff_add_local = change_local_css (op addIffs);
|
wenzelm@12375
|
299 |
val iff_add_local' = change_rules addIffs_local;
|
wenzelm@12375
|
300 |
val iff_del_local = change_local_css (op delIffs) o change_rules delIffs_local;
|
wenzelm@9860
|
301 |
|
wenzelm@10033
|
302 |
fun iff_att add add' del = Attrib.syntax (Scan.lift
|
wenzelm@10033
|
303 |
(Args.del >> K del ||
|
wenzelm@10033
|
304 |
Scan.option Args.add -- Args.query >> K add' ||
|
wenzelm@10033
|
305 |
Scan.option Args.add >> K add));
|
wenzelm@10033
|
306 |
|
wenzelm@9860
|
307 |
val iff_attr =
|
wenzelm@10033
|
308 |
(iff_att iff_add_global iff_add_global' iff_del_global,
|
wenzelm@10033
|
309 |
iff_att iff_add_local iff_add_local' iff_del_local);
|
wenzelm@9860
|
310 |
|
wenzelm@9860
|
311 |
|
wenzelm@9860
|
312 |
(* method modifiers *)
|
wenzelm@9860
|
313 |
|
wenzelm@9860
|
314 |
val iffN = "iff";
|
wenzelm@9860
|
315 |
|
wenzelm@9860
|
316 |
val iff_modifiers =
|
wenzelm@10033
|
317 |
[Args.$$$ iffN -- Scan.option Args.add -- Args.colon >> K ((I, iff_add_local): Method.modifier),
|
wenzelm@10033
|
318 |
Args.$$$ iffN -- Scan.option Args.add -- Args.query_colon >> K (I, iff_add_local'),
|
wenzelm@10033
|
319 |
Args.$$$ iffN -- Args.del -- Args.colon >> K (I, iff_del_local)];
|
wenzelm@9860
|
320 |
|
wenzelm@8469
|
321 |
val clasimp_modifiers =
|
wenzelm@9860
|
322 |
Simplifier.simp_modifiers @ Splitter.split_modifiers @
|
wenzelm@9860
|
323 |
Classical.cla_modifiers @ iff_modifiers;
|
wenzelm@9860
|
324 |
|
wenzelm@9860
|
325 |
|
wenzelm@9860
|
326 |
(* methods *)
|
wenzelm@5926
|
327 |
|
wenzelm@7559
|
328 |
fun clasimp_meth tac prems ctxt = Method.METHOD (fn facts =>
|
wenzelm@15032
|
329 |
ALLGOALS (Method.insert_tac (prems @ facts)) THEN tac (local_clasimpset_of ctxt));
|
wenzelm@7132
|
330 |
|
wenzelm@7559
|
331 |
fun clasimp_meth' tac prems ctxt = Method.METHOD (fn facts =>
|
wenzelm@15032
|
332 |
HEADGOAL (Method.insert_tac (prems @ facts) THEN' tac (local_clasimpset_of ctxt)));
|
wenzelm@5926
|
333 |
|
wenzelm@7559
|
334 |
val clasimp_method = Method.bang_sectioned_args clasimp_modifiers o clasimp_meth;
|
wenzelm@7559
|
335 |
val clasimp_method' = Method.bang_sectioned_args clasimp_modifiers o clasimp_meth';
|
wenzelm@5926
|
336 |
|
wenzelm@5926
|
337 |
|
wenzelm@9772
|
338 |
fun auto_args m =
|
wenzelm@9772
|
339 |
Method.bang_sectioned_args' clasimp_modifiers (Scan.lift (Scan.option (Args.nat -- Args.nat))) m;
|
wenzelm@9772
|
340 |
|
skalberg@15531
|
341 |
fun auto_meth NONE = clasimp_meth (CHANGED_PROP o auto_tac)
|
skalberg@15531
|
342 |
| auto_meth (SOME (m, n)) = clasimp_meth (CHANGED_PROP o (fn css => mk_auto_tac css m n));
|
wenzelm@9772
|
343 |
|
wenzelm@9772
|
344 |
|
wenzelm@9772
|
345 |
(* theory setup *)
|
wenzelm@9772
|
346 |
|
wenzelm@5926
|
347 |
val setup =
|
wenzelm@9860
|
348 |
[Attrib.add_attributes
|
wenzelm@9893
|
349 |
[("iff", iff_attr, "declaration of Simplifier / Classical rules")],
|
wenzelm@9860
|
350 |
Method.add_methods
|
wenzelm@9591
|
351 |
[("fastsimp", clasimp_method' fast_simp_tac, "combined fast and simp"),
|
wenzelm@9805
|
352 |
("slowsimp", clasimp_method' slow_simp_tac, "combined slow and simp"),
|
wenzelm@9805
|
353 |
("bestsimp", clasimp_method' best_simp_tac, "combined best and simp"),
|
wenzelm@9591
|
354 |
("force", clasimp_method' force_tac, "force"),
|
wenzelm@9772
|
355 |
("auto", auto_args auto_meth, "auto"),
|
wenzelm@10821
|
356 |
("clarsimp", clasimp_method' (CHANGED_PROP oo clarsimp_tac), "clarify simplified goal")]];
|
wenzelm@5926
|
357 |
|
oheimb@4652
|
358 |
end;
|