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

6 Dec 2009

      ----- Original Message ----- 
From: "joel falcou" <joel.falcou@lri.fr>
To: <boost@lists.boost.org>
Sent: Sunday, December 06, 2009 10:57 AM
Subject: Re: [boost] [chrono] type_traits/common_type and integer/ratio
...
joel falcou wrote:
...
could be nice if they used mpl::integral_c so it can be used easily as 
MPL meta-functions
forgot the code obv. :
namespace mpl
{
 template<class X> struct abs : integral_c< typename X::value_type, (X 
< 0 ? -X : X)> {};
}
etc
--
Hi Joel,

even if 

  template <boost::intmax_t X>
  struct static_abs
  {
      static const boost::intmax_t value = X < 0 ? -X : X;
  };

don't use mpl::integral_c, it is a valid mpl metafunction. I don't think it is worth adding a dependency to Boost.MPL.

Best,
Vicente

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

vicente.botet