Re: Why properties cannot be used as ref or out arguments

Can you apply a generic 10 times to the same class to apply to 10
different property pairs?

-----Original Message-----
From: Discussion of development on the .NET platform using any managed
language [mailto:[email protected]] On Behalf Of Richard
Howells
Sent: Tuesday, 11 March 2008 00:14
To: [email protected]
Subject: Re: [DOTNET-CLR] Why properties cannot be used as ref or out
arguments

Can you use a generic interface?

    interface IWhatever<T, U, V>
    {
        T MyProp1 { get; set; }
        U MyProp2 { get; set; }
        V MyProp3 { get; set; }
    }

    class Blah<T, U, V> : IWhatever<T, U, V>
    {
        #region IWhatever<T,U,V> Members

        public T MyProp1
        {
            get
            {
                throw new NotImplementedException();
            }
            set
            {
                throw new NotImplementedException();
            }
        }

        public U MyProp2
        {
            get
            {
                throw new NotImplementedException();
            }
            set
            {
                throw new NotImplementedException();
            }
        }

        public V MyProp3
        {
            get
            {
                throw new NotImplementedException();
            }
            set
            {
                throw new NotImplementedException();
            }
        }

        #endregion
    }

    class Program
    {
        static void Main(string[] args)
        {
            Blah<string, int, bool> SpecialBlahForStringIntBool =3D new
Blah<string, int, bool>();

        }
    }
Cheers,

- Richard
[email protected]
www.dynamisys.co.uk
(T) +44 (0) 1793 731225
(M) +44 (0) 773 297 1786

-----Original Message-----
From: Discussion of development on the .NET platform using any managed
language [mailto:[email protected]] On Behalf Of Shawn
Wildermuth
Sent: 10 March 2008 11:06
To: [email protected]
Subject: Re: [DOTNET-CLR] Why properties cannot be used as ref or out
arguments

I know its not terribly efficient, but couldn't you return a simple
struct
or anonymous type with the multiple pieces of information?

Thanks,

Shawn Wildermuth
http://adoguy.com
http://wildermuthconsulting.com
http://geekdinners.com
Microsoft MVP (C#), MCSD.NET, Author and Speaker

The Silverlight Tour is coming to a city near you!

-----Original Message-----
From: Discussion of development on the .NET platform using any managed
language [mailto:[email protected]] On Behalf Of Dean
Cleaver
Sent: Monday, March 10, 2008 7:00 AM
To: [email protected]
Subject: Re: [DOTNET-CLR] Why properties cannot be used as ref or out
arguments

Heh - cool - but as this website is entirely C#, I can't see Erlang
being of use, but the concept is interesting :)

Dino

-----Original Message-----
From: Discussion of development on the .NET platform using any managed
language [mailto:[email protected]] On Behalf Of Barry
Kelly
Sent: Monday, 10 March 2008 23:58
To: [email protected]
Subject: Re: [DOTNET-CLR] Why properties cannot be used as ref or out
arguments

Dean Cleaver <[email protected]> wrote:

> Problem is my variables are of differing types... not that I can tell
> from your code snippet, but It seems they are expected to be the same
> type?

Erlang is dynamically typed. However, more generally, tuples are
structurally typed, and each field can have a separate type - that's
what makes them different to arrays. In statically typed functional
languages, where tuples are common, the type of e.g. ("Barry", "Kelly")
would be (String, String).

> -----Original Message-----
> From: Discussion of development on the .NET platform using any managed
> language [mailto:[email protected]] On Behalf Of Jon
Skeet
> Sent: Monday, 10 March 2008 22:56
> To: [email protected]
> Subject: Re: [DOTNET-CLR] Why properties cannot be used as ref or out
> arguments
>
> Dean Cleaver wrote:
> > Yeah - getting my head around it now. Sadly, it's not VB I wanted it
> > for.
> >
> > Is a shame- looks like I will have to declare 2 variables, pass them
> in,
> > and then analyse the returned responses to achieve what I want -
takes
> > the "ideal" 1 line call to about 7 or 8 at least - was trying to
> > encapsulate a call, but it might not be feasible.
>
> Sounds like an argument for tuple return types:
>
> (FirstNameProperty, LastNameProperty) =3D SplitName(FullName);
>
> :)
>
> (Can you tell I've been learning Erlang? ;)
>
> I've no idea how much work is required either in terms of language
> design or CLR modifications to support this - I suspect it would be
> feasible in "language only" but a lot more elegant with CLR
integration.
>
> Jon
>
> =
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-- Barry

--
http://barrkel.blogspot.com/

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