--- a/src/HOL/Product_Type.thy Tue Sep 19 15:21:41 2006 +0200
+++ b/src/HOL/Product_Type.thy Tue Sep 19 15:21:42 2006 +0200
@@ -15,7 +15,7 @@
typedef unit = "{True}"
proof
- show "True : ?unit" by blast
+ show "True : ?unit" ..
qed
constdefs
@@ -761,6 +761,29 @@
subsection {* Code generator setup *}
+instance unit :: eq ..
+
+lemma [code func]:
+ "OperationalEquality.eq (u\<Colon>unit) v = True" unfolding eq_def unit_eq [of u] unit_eq [of v] by rule+
+
+code_instance unit :: eq
+ (Haskell -)
+
+instance * :: (eq, eq) eq ..
+
+lemma [code func]:
+ "OperationalEquality.eq (x1, y1) (x2, y2) = (OperationalEquality.eq x1 x2 \<and> OperationalEquality.eq y1 y2)"
+ unfolding eq_def by auto
+
+code_instance * :: eq
+ (Haskell -)
+
+code_const "OperationalEquality.eq \<Colon> unit \<Rightarrow> unit \<Rightarrow> bool"
+ (Haskell infixl 4 "==")
+
+code_const "OperationalEquality.eq \<Colon> 'a\<Colon>eq \<times> 'b\<Colon>eq \<Rightarrow> 'a \<times> 'b \<Rightarrow> bool"
+ (Haskell infixl 4 "==")
+
types_code
"*" ("(_ */ _)")
attach (term_of) {*