Re: [boost] [PREDEF] Review for the Boost.Predef library by Rene Riviera

Subject: Re: [boost] [PREDEF] Review for the Boost.Predef library by Rene Riviera
From: Artyom Beilis (artyomtnk_at_[hidden])
Date: 2012-02-28 06:52:29

----- Original Message -----
> From: Rene Rivera <grafikrobot_at_[hidden]>
> 
> I guess that depends on the developers. The reasons the macros are always 
> defined, to zero when not detected, is to reduce the amount of checks when 
> writing conditionals. At least in Boost, the common use case goes something like 
> this:
> 
> #if defined(_some_compiler_) && (_some_compiler_ < 123)
> //...
> #endif
> 
>

And in your case it would be

#if boost_some_compiler < boost_version(1,2,3)

Would give you true if the boost_some_compiler == 0 so you 
will have to write

#if boost_some_compiler < 0 && boost_some_compiler < boost_version(1,2,3)
...

I don't see too much savings.

Artyom