[boost] Re: Hello MPL world!

From: David B. Held (dheld_at_[hidden])
Date: 2003-01-06 13:14:25

"David Abrahams" <dave_at_[hidden]> wrote in message
news:uk7hitelq.fsf_at_boost-consulting.com...
> Yitzhak Sapir <yitzhaks_at_[hidden]> writes:
>
> > I think storing the text "Hello world!" in a vector
> > [...]
> > And then using functors to print it such as:
> [...]

While this is a cute idea, my first impression would be: "Uh...is this
really something I could use in my own code?"  On the other hand,
I seem to use compile-time if more than anything else, even in "user
code".  I suspect that most people will use mpl::if_ and type traits
more than anything else, so I think Dave's original example with
is_pointer<> would connect with the most programmers.  On the
other hand, I suspect that library authors are more likely to use the
type containers and algorithms, so an example illustrating those might
be more appropriate for them.  So I guess it depends on the
intended audience.

Dave

P.S. Outputting "Hello, world" in a way that generates significantly
more code than the run-time version is probably not a good way to
endear users to metaprogramming. ;>