Routine arity disambiguation, slash syntax (add/2, add/3)

examples/arities.csn

@@ -0,0 +1,48 @@
+(
+    (call slash 1)
+    (cmp res0 1 (ne? (fault)))
+
+    (call named 2)
+    (cmp res0 2 (ne? (fault)))
+
+    (call both 3)
+    (cmp res0 3 (ne? (fault)))
+
+    (call slash 1 2)
+    (cmp res0 1 (ne? (fault)))
+    (cmp res1 2 (ne? (fault)))
+
+    (call named 2 3)
+    (cmp res0 2 (ne? (fault)))
+    (cmp res1 3 (ne? (fault)))
+
+    (call both 3 4)
+    (cmp res0 3 (ne? (fault)))
+    (cmp res1 4 (ne? (fault)))
+
+    (halt)
+
+    (proc slash/1
+        (ret arg0)
+    )
+
+    (proc slash/2
+        (ret arg0 arg1)
+    )
+
+    (proc named a
+        (ret a)
+    )
+
+    (proc named a b
+        (ret a b)
+    )
+
+    (proc both/1 a
+        (ret a)
+    )
+
+    (proc both/2 a b
+        (ret a b)
+    )
+)

examples/factorial.csn

@@ -3,7 +3,7 @@
     (ld r0 res0)
     (halt)
 
-    (proc fac
+    (proc fac/1
         (cmp arg0 2
             (eq? (ret 2)))
         (sub r0 arg0 1)