Boost C++ Libraries: Ticket #2693: Golden ratio

cc changed

John Maddock — Thu, 29 Jan 2009 10:46:57 GMT

cc pbristow@… added

Oh no :-(

This was discussed at rather excessive length when Paul Bristow submitted his numeric constants library.... and no one could agree what the "correct" interface was, so the library was rejected. This is the main reason why our numeric constants are still considered implementation details (albeit semi-documented ones).

I'm CC'ing Paul on this in case he wants to comment.

I guess about the only thing everyone agreed upon during the review was the need for a set a constants library.

Regards, John.

micdestefano@… — Thu, 29 Jan 2009 11:27:27 GMT

Replying to johnmaddock:

Oh no :-(

Thanks. Actually, I've understood that the physical constants where rejected ... but I've not understood, from your answer, if it is possible to add the golden ratio or not. I don't know why this part of the library is considered an implementation detail ... I think that it is a very, very useful detail ... :-)

Steven Watanabe — Sat, 14 Feb 2009 22:04:19 GMT

Replying to micdestefano@gmail.com:

It would be great to have also some physical constants (like the speed of light, the gravitational constant, the magnetic permeability, etc. ... but this would not properly fit within your mathematical library).

The Units library contains double versions of a number of physical constants in SI units, for instance, http://tinyurl.com/cnyvgp

micdestefano@… — Mon, 16 Feb 2009 07:35:59 GMT

Thank you. I've never looked at the Units library. I'll have a look at it.

John Maddock — Tue, 10 Jul 2012 12:18:37 GMT

Paul, now that constants are part of Boost.Math, did we add this one? Should we? And more to the point can we close this issue ;-)

Paul A. Bristow — Tue, 10 Jul 2012 12:41:42 GMT

It is already there as phi (with a name golden ratio as well. So I will close this ticket.

status, version changed; keywords, resolution set

Paul A. Bristow — Tue, 10 Jul 2012 12:43:12 GMT

keywords golden ratio constant added
status new → closed
version Boost 1.37.0 → Boost 1.50.0
resolution → fixed

milestone changed

John Maddock — Thu, 02 Aug 2012 11:59:43 GMT

milestone Boost 1.38.0 → Boost 1.52.0

anonymous — Tue, 17 Nov 2015 19:39:47 GMT