src/HOL/Codatatype/Tools/bnf_fp_sugar_tactics.ML
changeset 49147 0da8120bd2aa
parent 49135 de13b454fa31
child 49149 166f19b4677b
--- a/src/HOL/Codatatype/Tools/bnf_fp_sugar_tactics.ML	Wed Sep 05 11:08:18 2012 +0200
+++ b/src/HOL/Codatatype/Tools/bnf_fp_sugar_tactics.ML	Wed Sep 05 11:08:18 2012 +0200
@@ -30,8 +30,9 @@
 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;
+  EVERY' (map2 (fn k => fn m =>
+    select_prem_tac n (REPEAT_DETERM_N m o dtac @{thm meta_spec} THEN' rotate_tac ~1 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'