Re: [boost] Re: meta-double

From: Peder Holt (peder.holt_at_[hidden])
Date: 2005-06-08 11:14:59

On 6/8/05, Allen <yaozhen_at_[hidden]> wrote:
> I wonder how this can be implemented. How could you separate the decimal
> part and the exponent part from the double literal like 3.14159
> 
> Would you upload the code to boost-sandbox vault?:)

Have done:
http://boost-sandbox.sourceforge.net/vault/ meta_double.hpp

> 
> Peder Holt wrote:
> > Is there any interest in a compile-time meta-version of double?
> >
> > Syntax:
> >
> > //Definition
> > typedef META_DOUBLE(3.1415926535897932384626433) pi;
> > //Or
> > META_DOUBLE(3.1415926535897932384626433) pi_;
> >
> > //Mathematical operations
> > typedef math::meta::add<pi,pi>::type pi2;
> >
> > //Evaluation:
> > assert(META_DOUBLE_EVAL(pi2)==3.1415926535897932384626433*2);
> >
> > This implementation uses two ints to represent the decimals, and a
> > short to represent the exponent.
> >
> > It has been tested on VC7.1,VC8.0 beta and GCC3.2
> >
> > Regards,
> > Peder
> 
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