Обсуждение: what is suffix _P in gram.y

Hello,

is it means " some PostgreSQL specific"?

regards

Pavel Stehule

On Sun, Jan 27, 2008 at 09:10:31PM +0100, Pavel Stehule wrote:
> Hello,
>
> is it means " some PostgreSQL specific"?

Not really. The main thing is that many symbols in gram.y eventually
get turned into a #define and if the symbol is a normal looking word
that may be used in another context it's common to suffix it with a _P
(the P stands for something but I forget what. Predicate?). That way
you don't run into unexpected surprises when it compiles with other
headers...

Have a nice day,
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> Those who make peaceful revolution impossible will make violent revolution inevitable.
>  -- John F Kennedy

"Pavel Stehule" <pavel.stehule@gmail.com> writes:
> is it means " some PostgreSQL specific"?

I think the original idea was P-for-Parser.  It's just there for tokens
whose macros would otherwise be likely to collide with other symbols.
        regards, tom lane

On 27/01/2008, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> "Pavel Stehule" <pavel.stehule@gmail.com> writes:
> > is it means " some PostgreSQL specific"?
>
> I think the original idea was P-for-Parser.  It's just there for tokens
> whose macros would otherwise be likely to collide with other symbols.
>
>                         regards, tom lane
>

ok. unterstand

thank you

Pavel Stehule