--- a/src/HOL/Codatatype/Tools/bnf_fp_sugar_tactics.ML Tue Sep 04 14:21:11 2012 +0200
+++ b/src/HOL/Codatatype/Tools/bnf_fp_sugar_tactics.ML Tue Sep 04 15:51:32 2012 +0200
@@ -7,6 +7,7 @@
signature BNF_FP_SUGAR_TACTICS =
sig
+ val mk_exhaust_tac: Proof.context -> int -> int list -> thm list -> thm -> thm -> tactic
val mk_fld_iff_unf_tac: Proof.context -> ctyp option list -> cterm -> cterm -> thm -> thm
-> tactic
end;
@@ -14,8 +15,17 @@
structure BNF_FP_Sugar_Tactics : BNF_FP_SUGAR_TACTICS =
struct
+open BNF_Tactics
open BNF_Util
+fun mk_exhaust_tac ctxt n ms ctr_defs fld_iff_unf sumEN' =
+ Local_Defs.unfold_tac ctxt (fld_iff_unf :: ctr_defs) THEN
+ rtac sumEN' 1 THEN
+ Local_Defs.unfold_tac ctxt @{thms all_prod_eq} THEN
+ EVERY' (map2 (fn k => fn m =>
+ select_prem_tac n (REPEAT_DETERM_N m o dtac @{thm meta_spec} THEN' etac @{thm meta_mp}) k THEN'
+ atac) (1 upto n) ms) 1;
+
fun mk_fld_iff_unf_tac ctxt cTs cfld cunf fld_unf unf_fld =
(rtac iffI THEN'
EVERY' (map3 (fn cTs => fn cx => fn th =>