[boost] Re: Re: Re: relational table as an STL container --anyinterest?

From: Arkadiy Vertleyb (vertleyb_at_[hidden])
Date: 2002-11-01 18:47:57

Right, but then, how do you call it:

object.getSomething<type>();
or
object.getSomething((type*)0);

I wasn't able to use the first syntax, although I was able to do similar
things with non-member functions.

Arkadiy

"Rene Rivera" <grafik666_at_[hidden]> wrote in message
news:20021101171555-r01010800-6478d435-0860-0108_at_12.100.89.43...
> [2002-11-01] Arkadiy Vertleyb wrote:
>
> >The FIELD macro is used to access a field inside a tuple.  It unwraps
into
> >the call to the templated method on the tuple class that further calls
> >static_cast to access the field.  So we now have:
> >
> >FIELD(tuple, c1) = 5; // we have it now
> >
> >but would like to have:
> >
> >tuple.field<c1>() = 5; // we want it like this
> >
> >Neither MSVC nor g++ allows us to do this.  Is there anything about the
> >standard that makes it illigal?  The best we could do is:
> >
> >tuple.field((c1*)0) = 5; // pretty ugly, isn't it?
> >
> >So, we decided to have the macro :o((
>
> I have a similar pattern in my code and I use this declaration, which
works
> in CW8 and G++:
>
> class some_class
> {
>     public:
>
>     template <class some_type> some_type & getSomething(
>         const some_type * _placeholder_ = 0)
>     {
>         //...
>     }
> };
>
> -- grafik - Don't Assume Anything
> -- rrivera_at_[hidden] - grafik_at_[hidden]
> -- 102708583_at_icq - Grafik666_at_AIM - Grafik_at_[hidden]
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