[boost] Re: [MPL] Lambda

From: David B. Held (dheld_at_[hidden])
Date: 2004-05-14 19:07:15

"David Abrahams" <dave_at_[hidden]> wrote in message
news:u4qqiep5w.fsf_at_boost-consulting.com...
>
> Just to clarify, we're talking about mpl::lambda here.

Right.

> "David B. Held" <dheld_at_[hidden]> writes:
>
> [...]
> > Now, my understanding is that we can use Lambda so that we can
> > invoke Foo this way:
> >
> > Foo<P> f;
>
> for some definition of "invoke" ;-)

I like to think of "operator<>" as the "metafunction call operator". ;>
It helps me to think of it in a more MPL-like way.

> [...]
> In the upcoming version of MPL (very soon now) mpl::apply --
> which you'll want to use even to invoke metafunction classes
> portably (no, using P::template apply<whatever>::type doesn't
> work everywhere) --

Really?  Where does that not work?

> will invoke mpl::lambda internally, so the upshot is that passing
> either lambda expressions or metafunction classes will work.

Cool.  Is "Real Soon Now(TM)" within the next month?

Dave

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