[Mono-bugs] [Bug 523899] New: GMCS fails to resolve generic types when using Nullable enums - regression
bugzilla_noreply at novell.com
bugzilla_noreply at novell.com
Tue Jul 21 12:06:37 EDT 2009
http://bugzilla.novell.com/show_bug.cgi?id=523899
Summary: GMCS fails to resolve generic types when using
Nullable enums - regression
Classification: Mono
Product: Mono: Compilers
Version: SVN
Platform: Macintosh
OS/Version: Mac OS X 10.5
Status: NEW
Severity: Normal
Priority: P5 - None
Component: C#
AssignedTo: mono-bugs at lists.ximian.com
ReportedBy: tom.philpot at logos.com
QAContact: mono-bugs at lists.ximian.com
Found By: ---
User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US;
rv:1.9.1.1) Gecko/20090715 Firefox/3.5.1
using System;
using System.Collections.Generic;
namespace Test
{
public enum Enum
{
One,
Two
}
class CompilerTest
{
public static void Main(string[] s) {
ThisDoesNotWork();
}
protected static int DoSomething<T>(string s, T t, ref T t2)
{
Console.WriteLine("s={0}", s);
Console.WriteLine("t={0}", t.ToString());
Console.WriteLine("t2={0}", t2.ToString());
t2 = default(T);
return 0;
}
// .NET 3.5 infers Enum? from T, Mono is confused
public static void ThisDoesNotWork()
{
// Nullable does not work
Enum? e = Enum.One;
DoSomething("abc", Enum.Two, ref e);
}
public static void ThisWorksFine()
{
Enum e = Enum.Two;
DoSomething("abc", Enum.Two, ref e);
Console.WriteLine("e={0}", e.ToString());
}
}
}
Reproducible: Always
Steps to Reproduce:
1. Try to compile the above code with gmcs (r138189)
Actual Results:
CompilerTest2.cs(35,10): error CS0411: The type arguments for method
`Test.CompilerTest.DoSomething<T>(string, T, ref T)' cannot be inferred from
the usage. Try specifying the type arguments explicitly
Expected Results:
Should compile.
This can be worked around by explictly specifying <Enum?> as the type.
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