Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10270: square root of boost units scaled_unit fails to compile
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-03-20 12:14:54
#10270: square root of boost units scaled_unit fails to compile
-------------------------------+-----------------------------
Reporter: sharifmarat@⦠| Owner: matthiasschabel
Type: Bugs | Status: new
Milestone: To Be Determined | Component: units
Version: Boost 1.55.0 | Severity: Problem
Resolution: | Keywords: scale
-------------------------------+-----------------------------
Comment (by petamas@â¦):
Hi all,
here's a fix for this problem:
{{{
namespace boost
{
namespace mpl
{
template<>
struct
divides_impl<boost::units::scale_dim_tag,boost::units::detail::static_rational_tag>
{
template<class T0, class T1>
struct apply
{
typedef boost::units::scale_list_dim<
boost::units::scale<
(T0::base),
typename mpl::divides<typename T0::exponent, T1>::type
>
> type;
};
};
}
}
}}}
The main problem is that boost::mpl::divides does not work for a
scale_list_dim and a static_rational. Power works because
boost::mpl::times is implemented in boost/units/detail/unscale.hpp. (In
fact, my fix is the copy of that code, replacing "times" with "divides".)
I'll try to add the fix to the library, but it's my first time on boost
trac, so I don't know how long that'll take.
-- Ticket URL: <https://svn.boost.org/trac/boost/ticket/10270#comment:4> Boost C++ Libraries <http://www.boost.org/> Boost provides free peer-reviewed portable C++ source libraries.
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