document X::Bind::NativeType

lib/X/Bind/NativeType.pod

@@ -11,4 +11,24 @@ run time. Thus it does not make sense to support both binding and assignment,
 and Perl 6 supports only assignment (which makes more sense, because native
 types are value types). So use assignment for natively typed variables.
 
+For example the code
+
+    my int $x := 3;
+
+dies with
+
+    Cannot bind to natively typed variable '$x'; use assignment instead
+
+and can be fixed by writing it as
+
+    my int $x = 3;
+
+=head1 Methods
+
+=head2 name
+
+    method name() returns Str:D
+
+Returns the name of the variable.
+
 =end pod