Re: [Tinycc-devel] [PATCH] Preprocessor: ignore everything after #error or #warning

[Marc Andre Tanner]

Dave Dodge wrote:

> You're right.  I missed that caveat about single quotes being
> undefined.  I'd mainly looked at the grammar in Annex A, which simply
> says "each non-white-space character that cannot be one of the above"
> and doesn't bother to mention quotes as a special case.
>
> So the _real_ problem is that the C code you're processing has
> undefined behavior ;-)

Ok, but it is not my code, i just want to compile it. And since it works 
with gcc...

> You could argue that since the line in question is #ifdef'd out, the
> token shouldn't be a problem.  But going strictly by the Standard you
> get the undefined behavior as early as translation phase 3 when the
> tokenization takes place, and the #ifdef doesn't get handled until
> phase 4.

I argue that gcc ignores it so we can too.

> Note that the bare apostrophe probably also wreaks havoc with syntax
> highlighting editors.  Emacs 21.4 seems to get very confused by it.

Vim seems to handle it just fine.

Marc

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 Marc Andre Tanner >< http://www.brain-dump.org/ >< GPG key: CF7D56C0