[Mono-bugs] [Bug 488960] New: Invalid CS0663 error with generics ('overloaded function cannot differ on use of parameter modifiers only')

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https://bugzilla.novell.com/show_bug.cgi?id=488960


           Summary: Invalid CS0663 error with generics ('overloaded
                    function cannot differ on use of parameter modifiers
                    only')
    Classification: Mono
           Product: Mono: Compilers
           Version: 2.2.x
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: C#
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: stapostol at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


User-Agent:       Opera/9.64 (X11; Linux x86_64; U; el) Presto/2.1.1

Gmcs thinks "ref T" and "T[]" refer to the same type, but correctly
distinguishes "ref int" and "int[]" as different types.

The following code illustrates the issue:

class Test
{
    static void Main() { }

    // Error CS0663 on gmcs, works on csc
    static void Foo<T>(ref T t) { }
    static void Foo<T>(T[] t) { }
    static void Foo<T>(T[,] t) { }
    static void Foo<T>(T[,,] t) { }

    // Works fine on both
    static void Bar(ref int t) { }
    static void Bar(int[] t) { }
    static void Bar(int[,] t) { }
    static void Bar(int[,,] t) { }
}

Reproducible: Always

Steps to Reproduce:
1. Compile the above code with gmcs.

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