Cross-posting to mono-dev and ironruby-core. System.Action delegate types (and its generic versions) were newly introduced in .NET 3.5, and they live inside System.Core.dll.
Dynamic Language Runtime wants to run on .NET 2.0, so it has its own version of these simple classes as Microsoft.Scripting.Utils.Action (and its generic versions). Now Mono 1.9's C# compiler defaults to C# 3.0 mode, and to quote, "the System.Core.dll assembly is now referenced and this might cause some type ambiguities, in particular with the "Action" type (System.Action from System.Core vs Gtk.Action for example). The fix is to either use fully qualified names for Gtk.Action, or to use namespace aliases." (See Mono release note.) Many IronRuby source files do both "using System" and "using Microsoft.Scripting.Utils", and name collision happens. Now Gtk.Action is annoying, but using fully qualified Microsoft.Scripting.Utils.Action is horrifying. Using "using alias directive" won't work with generics. C# Language Specification ECMA-334 25.5.7 specifically disallows this. This is logged as Microsoft Connect Feedback 93520 which is closed as "postponed" since 2004. http://connect.microsoft.com/VisualStudio/feedback/ViewFeedback.aspx?FeedbackID=93520 I can live with substituting all occurences of Action class, but I wonder if any of you have better idea. -- Seo Sanghyeon _______________________________________________ Ironruby-core mailing list Ironruby-core@rubyforge.org http://rubyforge.org/mailman/listinfo/ironruby-core
