[boost] Re: MPL usage for code generation

From: Andrei Alexandrescu (andrewalex_at_[hidden])
Date: 2003-01-22 22:23:00

"David Abrahams" <dave_at_[hidden]> wrote in message
news:u7kcwwu0e.fsf_at_boost-consulting.com...
> Yeah, I haven't always been very comfortable with the
> value-per-character of mpl::for_each -- it seems to have similar
> properties to std::for_each in that way.  It's got certain advantages
> for re-use:
>
>    1. You can use different sequence types (I know Andrei doesn't buy
>       this one, but I still do; the concept of tuple-as-type-sequence
>       being one motivator)

My understanding is that front and pop_front work with different sequence
types, isn't that so? If that's the case, (1) illustrates no advantage of
the complicated version over the simple version.

> I've been talking with Aleksey recently about how to improve the
> syntactic situation without losing the separation of concerns that we
> get, but we didn't come up with anything convincingly better.

The template pattern matching just makes it too easy... :o)))

Andrei