Re: cpplib: Implement _Pragma operator

["Zack Weinberg" <zackw at Stanford dot EDU>]

On Mon, Oct 30, 2000 at 08:31:00PM +0000, Neil Booth wrote:
> This patch implements _Pragma as introduced in the C99 standard.  A
> few minor changes to existing infrastructure were necessary.

Yay! That's a major C99 compliance checklist item.  Thank you.

> Firstly, the destringized string does not pass through stages 1 and 2
> of processing; i.e. trigraphs, UCNs and escaped newlines are not
> processed.  We should not do this for preprocessed input either, but
> we have been doing.  I added a new flag "from_stage3" to indicate not
> to do this, and we use this for _Pragma, command line directives, and
> preprocessed buffers.

We shouldn't be processing comments either.

I had been under the impression that string constant concatenation was
legal inside _Pragma, but in fact it isn't.  It might make sense as an
extension, though; thoughts?  (If we do, we ought to apply it to #line
and #include too, for consistency.)

zw