Preprocessor keyword #echo is missing

[Zack Weinberg]

Martin Sebor <sebor@roguewave.com> writes:

> A #echo at the compiler level rather than at the preprocessor level
> would, IMHO, be extremely useful in the context of metaprogramming.
> At the very least, it would provide a framework for the proposed
> implementation of the static assert feature:
>
> http://anubis.dkuug.dk/jtc1/sc22/wg21/docs/papers/2002/n1381.htm

That is an #error analog, not #echo. I do consider it a useful
feature, but if I were implementing it I'd just take the spec straight
from N1381 (with appropriate modifications for C) -- don't see the
need for a static_echo().

I wonder why the string literal is included there, when it isn't for
the runtime assert().

zw