Re: [boost] Boost.Preprocessor: Alternatives to defined(x)

From: Paul Mensonides (pmenso57_at_[hidden])
Date: 2003-01-05 19:10:21

----- Original Message -----
From: "Vesa Karvonen" <vesa_karvonen_at_[hidden]>

> By the way, I just found the following article (after I posted my proposed
> IS_EMPTY()):
>
>
http://groups.google.com/groups?q=is_empty+paul+mensonides&hl=en&lr=&ie=UTF-
8&oe=UTF-8&selm=2HB49.54872%24D36.57225%40rwcrnsc53&rnum=1
>
> Interesting stuff.

Yeah.  I see no way of fully detecting an empty argument without
well-defined behavior when token-pasting results in multiple tokens.  This
is exactly, IMHO, the type of thing that should be well-defined.  It is not
dependent on the platform or architecture; it is just left undefined for no
reason. :(

Paul Mensonides