Re: [DOTNET-ROTOR] Small Gyro bug

[Dave Berry (Independent Contractor)]

Sorry, multiple constraints aren't supported yet.  This is something
we're working on -- you'll notice that the syntax allows it.  Full
support requires a change in the metadata format for constraints (among
other things).

Dave.


-----Original Message-----
From: Jeroen Frijters [mailto:[EMAIL PROTECTED]] 
Sent: 05 September 2002 10:32
To: [EMAIL PROTECTED]
Subject: Re: [DOTNET-ROTOR] Small Gyro bug

When I specify multiple constraints for the same identifier, it doesn't
work nor does the compiler give an error message.

For example:
class Test
{
  public static int GetIt<T>(T v) where T : System.IConvertible, T :
System.IFormattable
  {
    return v.ToInt32();
  }
  public static void Main()
  {
    GetIt<int>(2);
  }
}

Gives the compilation error:
error CS0117: 'T' does not contain a definition for 'ToInt32'

I had really hoped that this would be possible, so if it isn't valid to
supply multiple constraints for the same type argument, read this as a
request for enhancement ;-)

Regards,
Jeroen
P.S. I'd love to receive a copy of csharp.htm

> -----Original Message-----
> From: Discussion of the Rotor Shared Source CLI
> implementation [mailto:[EMAIL PROTECTED]] On
> Behalf Of Dave Berry (Independent Contractor)
> Sent: Thursday, September 05, 2002 11:10
> To: [EMAIL PROTECTED]
> Subject: Re: [DOTNET-ROTOR] Small Gyro bug
>
>
> Thanks for the report.  Regarding documentation, there's a doc file
> (csharp.html) missing in the tarball.  I'll add this to the tarball on
> the download site, and post a message here when it's ready.  If anyone
> has already downloaded the release and would like a copy of this file,
> please mail me directly.
>
> Dave.
>
>
> -----Original Message-----
> From: Jeroen Frijters [mailto:[EMAIL PROTECTED]]
> Sent: 05 September 2002 09:55
> To: [EMAIL PROTECTED]
> Subject: [DOTNET-ROTOR] Small Gyro bug
>
> When I was trying to figure out the constraint syntax (is there any
> documentation that I missed?), I ran into the following:
>
> class test
> {
>   public static T Func<System.IConvertible : T>(T v) { return v; }
> }
>
> When you try to compile this, the compiler exits without any error
> messages.
>
> BTW, for those who are interested, the correct syntax is:
>
> class test
> {
>   public static T Func<T>(T v) where T : System.IConvertible
> { return v;
> }
> }
>
> Regards,
> Jeroen
>