Hum, I don't know how generalized that scenario is, but it sure does
not look clean to me and if I really want to do that, I would use the
more explicit call
TryParse<object>(input, out value)
to make clear my intention. Anyway, I can live with that, I will just
be more careful to watch for yet another trap (YAT).
Sébastien
On 4/11/08, Mark Hurd <[EMAIL PROTECTED]> wrote:
> On 12/04/2008, Sébastien Lorion <[EMAIL PROTECTED]> wrote:
> > Well, in my code I have another method similar to:
> >
> > void DoStuff(Type type, string input)
> > {
> > object value;
> > if (TryParse(input, out value))
> > {
> > // ...
> > }
> > }
> >
> > I made a mistake and forgot to pass "type" to TryParse. I discovered
> > the bug only at runtime when testing my code. I can understand the
> > compiler behavior, but it is not what I expect since I think in most
> > case, the programmer did not intend to do that. A warning would be
> > nice here IMO.
> >
> > Sébastien
>
>
> I assume the warning you're looking for is something like "Generic
> type inferred as Object", which would be the deliberate case for too
> many situations to be a warning. (Remember that in most cases warnings
> are seen as "show stoppers" -- the only valid final build is one
> without any warnings.)
>
> However, if you want it to be a warning or invalid for your code, add
> an overload:
>
> [Obsolete("Is this what you really meant?", false)]
> bool TryParse(string Input, out object Value)
>
> And when the overload resolution matches that signature, you'll get
> the Obsolete warning (or error if you pass True in the
> ObsoleteAttribute reference).
>
> Regards,
> Mark Hurd, B.Sc.(Ma.)(Hons.)
>
> P.S. I've hand crafted the C# code above from this hand crafted VB.NET:
>
> <Obsolete("Is this what you really meant?", False)> _
> Function TryParse(ByVal Input As String, <Out()> ByRef Value As
> Object> As Boolean
>
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--
Sébastien
www.sebastienlorion.com
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