Philippe Leybaert wrote: > But I personally think this behavior is completely wrong. Calling .new from > IronRuby should always call the constructor, not a static method named > .New() that happens to exist somewhere in the class hierarchy. (if the > .New() method is defined in a base class, you get the same problem).
"new" is just a Ruby method on the Class object, which Ruby happens to call to construct an object. Because it's just a method, it can be overridden. For example, a Ruby class's #new can be overridden to return ANY object. >>> class Foo ... def self.new ... 42 ... end ... end => nil >>> Foo.new => 42 >>> Foo.new.class => Fixnum >>> So, anywhere in the class hierarchy, #new can be overridden. For example, if a base class overrides new, it does so for all its subclasses also, just as normal inheritance tells it do: >>> class Bar < Foo ... end => nil >>> Bar.new => 42 At a high-level, the way IronRuby's .NET interop works is by treating any .NET-based code as if it were Ruby code, so a CLR Type will be shown as a Ruby Class. Therefore, defining a "New" method in C# is the moral equivalent of defining "new" on any Ruby class, which will override Class#new, which in turn overrides the CLR .ctor. Which is why "clr_new" is provided. ~js > -----Original Message----- > From: ironruby-core-boun...@rubyforge.org [mailto:ironruby-core- > boun...@rubyforge.org] On Behalf Of Tomas Matousek > Sent: dinsdag 29 juni 2010 19:24 > To: ironruby-core@rubyforge.org > Subject: Re: [Ironruby-core] Calling constructor when static .New() method is > defined > > You can call CLR constructor using "clr_new" method: > > Tester.clr_new > > Tomas > > -----Original Message----- > From: ironruby-core-boun...@rubyforge.org [mailto:ironruby-core- > boun...@rubyforge.org] On Behalf Of Philippe Leybaert > Sent: Tuesday, June 29, 2010 9:57 AM > To: ironruby-core@rubyforge.org > Subject: [Ironruby-core] Calling constructor when static .New() method is > defined > > Shay Friedman suggested I'd post this to the mailing list, as it may be a bug > in > IronRuby: > > It seems impossible to call a constructor when there is a static .New() > method defined on a class. > > This is a minimal test case demonstrating the problem: > > .NET (C#) class: > > public class Tester > { > public static void New() > { > Console.WriteLine("In Tester.New()"); > } > > public Tester() > { > Console.WriteLine("In constructor"); > } > } > > IronRuby code: > > Tester.new > Tester.New > > The ruby code above calls Tester.New() in both cases. There seems to be no > way to call the regular constructor of this class. > > _______________________________________________ > Ironruby-core mailing list > Ironruby-core@rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core > > _______________________________________________ > Ironruby-core mailing list > Ironruby-core@rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core > _______________________________________________ > Ironruby-core mailing list > Ironruby-core@rubyforge.org > http://rubyforge.org/mailman/listinfo/ironruby-core _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core
