Re: [boost] [wave) experiences

From: Hartmut Kaiser (hartmut.kaiser_at_[hidden])
Date: 2005-12-04 18:25:48

Daryle Walker wrote:

> > It's not legal for 32 bit systems. Either flag the 11112223334 with 
> > the LL suffix (and the --long_long command line option) or 
> you are out 
> > of luck with Wave. At least as long the code is not hidden inside a 
> > non-evaluated #if/#endif block. I've fixed Wave after 
> 1.33.0 to accept 
> > large numbers in non-evaluated #if expressions, just to 
> allow to compile Boost.
> [TRUNCATE]
> 
> Maybe one day we could use some sort of bignum class to hold 
> preprocessor numbers.  I'm guessing that you currently base 
> the "number too large" errors by trying to load the number 
> into a (built-in) numeric variable.  The problem is that it 
> won't work for cross-compilers where the compiling computer's 
> number sizes are smaller than the number sizes on the target computer.

Yes, it currently depends on the size of a 'long' for the platform Wave was
compiled for. But the whole expression arithmetic is very localised to a
single class, so that changing the implementation isn't an issue at all. Are
there any plans to add a bignum class to Boost?

Regards Hartmut