# HG changeset patch
# User blanchet
# Date 1380703141 -7200
# Node ID 07ab4fd922c2ae1124f174bc175f303296650041
# Parent  cede3c1d2417fc9e2ff947dbdb3c7db6018c259a
strengthen tactic w.r.t. let

diff -r cede3c1d2417 -r 07ab4fd922c2 src/HOL/BNF/Tools/bnf_fp_rec_sugar_tactics.ML
--- a/src/HOL/BNF/Tools/bnf_fp_rec_sugar_tactics.ML	Wed Oct 02 10:34:13 2013 +0200
+++ b/src/HOL/BNF/Tools/bnf_fp_rec_sugar_tactics.ML	Wed Oct 02 10:39:01 2013 +0200
@@ -62,7 +62,8 @@
   end;
 
 fun mk_primcorec_prelude ctxt defs thm =
-  unfold_thms_tac ctxt defs THEN HEADGOAL (rtac thm) THEN unfold_thms_tac ctxt @{thms split};
+  unfold_thms_tac ctxt defs THEN HEADGOAL (rtac thm) THEN
+  unfold_thms_tac ctxt @{thms Let_def split};
 
 fun mk_primcorec_disc_tac ctxt defs disc_corec k m exclsss =
   mk_primcorec_prelude ctxt defs disc_corec THEN mk_primcorec_cases_tac ctxt k m exclsss;