corelinux-develop

[Corelinux-develop] fix for cpp warning

[Christophe Prud'h. <pru...@MI...>]

with g++ 2.95 and 2.96 the following works fine and gives no warning

#define A( tag ) a::tag

whereas 

#define Ap( tag ) a::##tag

gives a warning message for 2.96

a is a namespace of course

comments?

C.
-- 
  Christophe Prud'homme                 |
  MIT, 77, Mass Ave, Rm 3-243           |  The Second Law of Thermodynamics:
  Cambridge MA 02139                    |  If you think things are in a mess
  Tel (Office) : (00 1) (617) 253 0229  |   now, just wait!
  Fax (Office) : (00 1) (617) 258 8559  |  -- Jim Warner
  http://augustine.mit.edu/~prudhomm    |
                          Following the hacker spirit

Re: [Corelinux-develop] fix for cpp warning

[Frank V. C. <fr...@co...>]

Christophe Prud'homme wrote:
> 
> with g++ 2.95 and 2.96 the following works fine and gives no warning
> 
> #define A( tag ) a::tag
> 
> whereas
> 
> #define Ap( tag ) a::##tag
> 
> gives a warning message for 2.96
> 
> a is a namespace of course
> 
> comments?

We drop the ## 

-- 
Frank V. Castellucci

Re: [Corelinux-develop] fix for cpp warning

[Christophe Prud'h. <pru...@MI...>]

>
> We drop the ##
done

-- 
  Christophe Prud'homme                  |
  MIT, 77, Mass Ave, Rm 3-243            |   As flies to wanton boys are we
  Cambridge MA 02139                     |   to the gods; they kill us for
  Tel (Office) : (00 1) (617) 253 0229   |   their sport.
  Fax (Office) : (00 1) (617) 258 8559   |   -- Shakespeare, "King Lear"
  http://augustine.mit.edu/~prudhomm     |
                          Following the hacker spirit

Re: [Corelinux-develop] fix for cpp warning

[Gabriel D. R. <Gab...@cm...>]

"Christophe Prud'homme" <pru...@MI...> writes:

| with g++ 2.95 and 2.96 the following works fine and gives no warning
| 
| #define A( tag ) a::tag
| 
| whereas 
| 
| #define Ap( tag ) a::##tag
| 
| gives a warning message for 2.96
| 
| a is a namespace of course
| 
| comments?

The former is right and the second invokes undefined behavior -- see
my previous message.

-- Gaby