Re: [Boost-users] supressing "extra ;" warnings with GCC 3.4

From: David Abrahams (dave_at_[hidden])
Date: 2005-06-30 07:30:29

Dave Steffen <dgsteffen_at_[hidden]> writes:

>  I claim that our macros and use thereof is A) correct and B) safe.
>  It just so happens that these macro constructs occasionally expand to
>  something that has an extra semicolon, which triggers a warning in
>  GCC 3.4 that we haven't seen before.  

The warning will be an error on other compilers.  The semicolons
aren't just "bad style;" they're illegal.

>  What I'm asking is this: assuming that our macros and useage
>  thereof is correct, 

Well, it's not correct if you expect those semicolons to be usable
after them.

>  how do we
>
> 	  A) silence the GCC warning about extra semicolons, or 

I wouldn't count on there being a way.

> 	  B) modify the construct so that the trailing semicolon is
> 	  "legal", or at least "something that won't scare the
> 	  compiler".

I suggest you use Emacs or some other programmable editor and teach
its indentation mode about your macros if automatic indentation is
that important.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com