Re: [PATCH 0/3] yacc: compute the best type for the state number

[Paul Eggert]

On 10/2/19 10:55 AM, Kaz Kylheku wrote:
> Over time, POSIX has invented new identifiers that didn't follow
> any namespace pattern. Or they suddenly invented new namespace
> prefixes, unpredictably. We've survived.

To be fair, they've largely done this only when you include a POSIX header.

> If some new_fangled_t
> is introduced into <sys/types.h> in 2050, there will be some
> -DPOSIX_SOURCE=20500112 or whatever to enable its visibility,
> and that of any function prototypes which use it.

There's no need for an implementation to do that since _t is reserved, 
and in practice many implementations don't do it.

> "Conforming applications shall not use names beginning in yy or YY since 
> the yacc parser uses such names."

Sorry, I didn't know that.