Re: Namespaces and pre-processing directives

["Andrea 'fwyzard' Bocci" <fwyzard-gcc@libero.it>]

At 15.49 04/04/2003 +0530, Megha Murarka wrote:
>Hi All,
>
>The program given below compiles fine.
>but if we use the statement ,
>int x = MYSPACE::VALUE +1;
>  It gives an error. Why is it so ? (when the #define is present inside the
>scope of the namespace ) ????
>****************************************************************************
>**
>namespace MYSPACE{
>     #define VALUE 50;
>};
>int main(){
>     int x = VALUE + 1;
>     return 1;
>}
>
>Regards,
>Megha

#define's are handled by the preprocessor, and like macros are unaffected 
by namespaces, classes, etc.
If you try to use them, the compilersees:

>namespace MYSPACE{
>};
>int main(){
>     int x = MYSPACE::50 + 1;
>     return 1;
>}

which has not much sense...

If you need to use namespaces for constants, use enumes instead:

namespace MYSPACE{
     enum {
         VALUE = 50
     };
};
int main(){
     int x = MYSPACE::VALUE + 1;
     return 1;
}

works.

fwyzard