[boost] Re: Re: First lambda

From: Jonathan Turkanis (technews_at_[hidden])
Date: 2004-03-03 23:40:11

"Joel de Guzman" <joel_at_[hidden]> wrote in message
news:4046A2AE.8020408_at_boost-consulting.com...
> Jonathan Turkanis wrote:
>

> >
> > How about:
> >
> >     unsigned long n = std::accumulate(
> >           xs.begin(), xs.end(), 0UL,
> >               auto(long lhs, const auto& rhs)     // inline fn
with no
> > name.
> >               {
> >                   return lhs + rhs.count;
> >               }
> >           );
>
> I would prefer also eliding the argument types:
>
>      unsigned long n = std::accumulate(
>            xs.begin(), xs.end(), 0UL,
>                lambda(lhs, rhs)
>                {
>                    return lhs + rhs.count;
>                }
>            );
>
> Most of the time, you also do not know the type of the
> arguments before hand.

That's why I used 'auto'. (Maybe I should have used it for the first
argument position, too.)

Isn't it useful to have a way to specify whether the argument is to be
passed by value, reference, const reference, etc. ?

Jonathan