src/FOLP/ex/If.thy
changeset 69593 3dda49e08b9d
parent 61337 4645502c3c64
--- a/src/FOLP/ex/If.thy	Fri Jan 04 21:49:06 2019 +0100
+++ b/src/FOLP/ex/If.thy	Fri Jan 04 23:22:53 2019 +0100
@@ -9,7 +9,7 @@
   assumes "!!x. x : P ==> f(x) : Q"  "!!x. x : ~P ==> g(x) : R"
   shows "?p : if(P,Q,R)"
 apply (unfold if_def)
-apply (tactic \<open>fast_tac @{context} (FOLP_cs addIs @{thms assms}) 1\<close>)
+apply (tactic \<open>fast_tac \<^context> (FOLP_cs addIs @{thms assms}) 1\<close>)
 done
 
 schematic_goal ifE:
@@ -19,7 +19,7 @@
   shows "?p : S"
 apply (insert 1)
 apply (unfold if_def)
-apply (tactic \<open>fast_tac @{context} (FOLP_cs addIs [@{thm 2}, @{thm 3}]) 1\<close>)
+apply (tactic \<open>fast_tac \<^context> (FOLP_cs addIs [@{thm 2}, @{thm 3}]) 1\<close>)
 done
 
 schematic_goal if_commute: "?p : if(P, if(Q,A,B), if(Q,C,D)) <-> if(Q, if(P,A,C), if(P,B,D))"
@@ -33,11 +33,11 @@
 ML \<open>val if_cs = FOLP_cs addSIs [@{thm ifI}] addSEs [@{thm ifE}]\<close>
 
 schematic_goal if_commute: "?p : if(P, if(Q,A,B), if(Q,C,D)) <-> if(Q, if(P,A,C), if(P,B,D))"
-apply (tactic \<open>fast_tac @{context} if_cs 1\<close>)
+apply (tactic \<open>fast_tac \<^context> if_cs 1\<close>)
 done
 
 schematic_goal nested_ifs: "?p : if(if(P,Q,R), A, B) <-> if(P, if(Q,A,B), if(R,A,B))"
-apply (tactic \<open>fast_tac @{context} if_cs 1\<close>)
+apply (tactic \<open>fast_tac \<^context> if_cs 1\<close>)
 done
 
 end