new tag syntax; preparing for Core patterns

new tag syntax; preparing for data names

examples/factorial.hs

@@ -1,6 +1,6 @@
 fac n = case (==#) n 0 of
-    { 1 -> 1
-    ; 0 -> (*#) n (fac ((-#) n 1))
+    { <1> -> 1
+    ; <0> -> (*#) n (fac ((-#) n 1))
     };
 
 main = fac 3;

examples/sumList.hs

@@ -2,8 +2,8 @@ nil = Pack{0 0};
 cons x y = Pack{1 2} x y;
 list = cons 1 (cons 2 (cons 3 nil));
 sum l = case l of
-    { 0      -> 0
-    ; 1 x xs -> (+#) x (sum xs)
+    { <0>      -> 0
+    ; <1> x xs -> (+#) x (sum xs)
     };
 main = sum list;