[boost] Re: meta-double

From: Allen (yaozhen_at_[hidden])
Date: 2005-06-08 09:12:11

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?:)

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