preprocessing question

[Jan Beulich]

>>>> #define x        alt_x
>
>the preprocessor token "x" is an object-like macro standing for "alt_x", so
>when we get to
>
>>>> #define alt_x(p) x(p+1)
>
>  what the preprocessor sees after the first round of expansion is
>
>#define alt_x(p) alt_x(p+1)

As pointed out before - there is *no* expansion for preprocessing
directives, except where the standard explicitly says otherwise.

Jan