Re: [boost] [preprocessor] feature request

From: Pavol Droba (droba_at_[hidden])
Date: 2006-12-22 16:03:19

Paul Mensonides wrote:
>> -----Original Message-----
>> From: boost-bounces_at_[hidden] 
>> [mailto:boost-bounces_at_[hidden]] On Behalf Of Pavol Droba
> 
>> Would it be possible to add BOOST_PP_RESET_COUNTER() macro.
>> The effect is to reset BOOST_PP_COUNTER to zero.
> 
> The purpose of the counter is to provide a globally unique number--across
> includes and across libraries.  If actually need a variable, you should use the
> slot mechanism instead.  It is a little more wordy, but it gives you more
> control over what the value actually is.
> 
> #define BOOST_PP_VALUE 0
> #include BOOST_PP_ASSIGN_SLOT(1)
> 
> BOOST_PP_SLOT(1) // 0
> 
> #define BOOST_PP_VALUE BOOST_PP_SLOT(1) + 1
> #include BOOST_PP_ASSIGN_SLOT(1)
> 
> BOOST_PP_SLOT(1) // 1
> 
> // etc.
> 
> We could add a BOOST_PP_SLOT_INC macro to shorten this.
> 

Thanks for explanation.

This is sufficient for my needs, even though I find counter more 
elegant. BOOST_PP_SLOT_INC would be handy.

Best regards,
Pavol.