[Mono-bugs] [Bug 529691] New: gmcs requires extra type arguments for nested generic types.

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Mon Aug 10 11:09:47 EDT 2009


           Summary: gmcs requires extra type arguments for nested generic
    Classification: Mono
           Product: Mono: Compilers
           Version: SVN
          Platform: i586
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: C#
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: aenomoto at novell.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

The following types are simplified version of how Silverlight WCF custom client
proxies constitutes, which are based on ClientBase<TChannel> and

There is a nested generic type Bar<V> inside a generic type Foo<T>. Then there
is a derived type of generic Foo with derived type of Bar as its nested type.

public class Foo<T>
        protected class Bar<V>

public interface IBaz

public class FooImpl : Foo<IBaz>
        private class BarImpl : Bar<IBaz>


gmcs fails to compile it as:
test.cs(14,33): error CS0305: Using the generic type `Foo<T>.Bar<V>' requires
`2' type argument(s)
test.cs(3,25): (Location of the symbol related to previous error)
Compilation failed: 1 error(s), 0 warnings

csc does not result in it.

I know that generic nested types in general requires type arguments for parent
types, but in this "derived and nested" case it does not seem to be required.

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