[Mono-dev] Constructor implementation obligation via interface?
I have a question about C# 2.0: If I want the compiler to show an error if a class A does not implement the function void B(), I can make an interface that contains this method and make class A inherit from that interface. But, how can I do it if I want the compiler to show an error if class A doesn't have an empty constructor. Can this be controlled statically? Thanks in advance. -- ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Constructor implementation obligation via interface?
You can't force a constructor via an interface... Write an abstract class with the constructor definition that you want, specify that the interface inherits the abstract class and then make your class implement the interface. Think that's right, might be a better way... On 5/24/06, Ympostor [EMAIL PROTECTED] wrote: I have a question about C# 2.0: If I want the compiler to show an error if a class A does not implement the function void B(), I can make an interface that contains this method and make class A inherit from that interface. But, how can I do it if I want the compiler to show an error if class A doesn't have an empty constructor. Can this be controlled statically? Thanks in advance. -- ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list -- Martin Hinks http://www.m-s-d.net ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Constructor implementation obligation via interface?
There is a slight problem. In C# empty constructors are added automatically, so you can't define a class without empty constructor. What you can do is to define a class with private empty constructor, which will prevent user from instanciating it directly. I guess there is not way to forbid this. 2006/5/24, Ympostor [EMAIL PROTECTED]: I have a question about C# 2.0: If I want the compiler to show an error if a class A does not implement the function void B(), I can make an interface that contains this method and make class A inherit from that interface. But, how can I do it if I want the compiler to show an error if class A doesn't have an empty constructor. Can this be controlled statically? Thanks in advance. -- ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list -- Kamil Skalski http://nazgul.omega.pl ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
Re: [Mono-dev] Constructor implementation obligation via interface?
so you can't define a class without empty constructor. Well, in an abstract class you could tag the empty constructor mustoverride so that all derivative classes must explicitly override the emtpy constructor... Martin On 5/24/06, Kamil Skalski [EMAIL PROTECTED] wrote: There is a slight problem. In C# empty constructors are added automatically, so you can't define a class without empty constructor. What you can do is to define a class with private empty constructor, which will prevent user from instanciating it directly. I guess there is not way to forbid this. 2006/5/24, Ympostor [EMAIL PROTECTED]: I have a question about C# 2.0: If I want the compiler to show an error if a class A does not implement the function void B(), I can make an interface that contains this method and make class A inherit from that interface. But, how can I do it if I want the compiler to show an error if class A doesn't have an empty constructor. Can this be controlled statically? Thanks in advance. -- ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list -- Kamil Skalski http://nazgul.omega.pl ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list -- Martin Hinks http://www.m-s-d.net ___ Mono-devel-list mailing list Mono-devel-list@lists.ximian.com http://lists.ximian.com/mailman/listinfo/mono-devel-list
