From: Hugo Duncan (hugoduncan_at_[hidden])
Date: 2003-10-10 09:58:20
Jeff Garland <jeff_at_[hidden]> wrote:
> Many concepts in the date_time domain, such
> as leap seconds, are defined by legislation instead of physics and hence
> create lots of difficulties.
This is a problem with a library that we use here. It defines
a quantity as a numeric type and a set of dimensions
template <typename T, typename Dimensions> class quantity;
where dimensions contains a mpl type sequence, with each
element holding instances of
template <
typename DimensionType
, long Numerator
, long Denominator=1
> struct dimension_power
Each DimensionType is then assosciated with a unit.
This works very well with basic units (ie units for single dimensions of
unit
power), but starts to give problems for things like gallon which
is defined for (L^3).
> Jeff
Hugo