Gerhard Wesp <gwesp <at> google.com> writes:
IOW, for me a physical quantity would just be the bare template< int mass, int time, int distance, /* rest of 7 SI base units */ > class pq { double value; };
(add all the necessary construcors, accessors, operators, etc...; may also be templated on the value type.)
I believe the rest of a PQ library can be created around this template.
FWIW, this is exactly how I implemented the equivalent of "t2_quantity" in my own library. I find it to be what I need for most of my scientific computations. I look forward to its coming later (hopefully) in PQS. On the other hand, Andy implemented his "t1_quantity" first, and I see the value of that also, but for different situations. What you and I need is really the yet-to-come t2_quantity (and I need t3_quantity as well), but I think they can fit well into a common framework. What Andy has now is a good start, but t1_quantity alone doesn't satisfy all the users. I think that's the really source of some of the criticisms that PQS has received. -- Leland