modelize_classes: warn on parameter types bounded on final classes

Signed-off-by: Jean Privat <jean@pryen.org>

diff --git a/src/modelize_class.nit b/src/modelize_class.nit
index 09b7081..b00508b 100644 (file)
--- a/src/modelize_class.nit
+++ b/src/modelize_class.nit
@@ -154,6 +154,9 @@ redef class ModelBuilder
                                                bounds.add(bound)
                                                nfd.bound = bound
                                        end
+                                       if bound isa MClassType and bound.mclass.kind == enum_kind then
+                                               warning(nfdt, "Warning: Useless formal parameter type since `{bound}` cannnot have subclasses.")
+                                       end
                                else if mclass.mclassdefs.is_empty then
                                        # No bound, then implicitely bound by nullable Object
                                        var bound = objectclass.mclass_type.as_nullable