model: protect MClassDef.is_intro and provide MClass.try_intro

[nit.git] / tests / sav / error_class_generic_alt2.res

alt/error_class_generic_alt2.nit:18,22--26: Warning: Useless formal parameter type since `Float` cannnot have subclasses.
alt/error_class_generic_alt2.nit:25,8--12: Type error: 'Array' is a generic class.