Re: [boost] [chrono] type_traits/common_type and integer/ratio

Subject: Re: [boost] [chrono] type_traits/common_type and integer/ratio
From: John Maddock (john_at_[hidden])
Date: 2009-12-06 04:49:32

> I hav refactored boost/ratio;hpp to use math::static_gcd instead of the 
> internal detail::static_gcd, and this is working now. In the detail 
> implementation there was also the following metafunctions
>
>  template <boost::intmax_t X>
>  struct static_abs
>  {
>      static const boost::intmax_t value = X < 0 ? -X : X;
>  };
>
>  template <boost::intmax_t X>
>  struct static_sign
>  {
>      static const boost::intmax_t value = X == 0 ? 0 : (X < 0 ? -1 : 1);
>  };
>
>
> Is there something similar in Boost.Math or elsewhere?

Nope, but they might make reasonable additions... or maybe they would be 
better in Boost.Integer I don't know?

John.