| -----Original Message----- | From: boost-bounces@lists.boost.org | [mailto:boost-bounces@lists.boost.org] On Behalf Of Noah Stein | Sent: 26 October 2005 15:39 | To: boost@lists.boost.org | Subject: Re: [boost] Interest in dimension/unit-checking library? | | > Paul A Bristow wrote: | > Sent: Wednesday, October 26, 2005 1:46 AM | > To: boost@lists.boost.org | > Subject: Re: [boost] Interest in dimension/unit-checking library? | | | > We are talking about implicit conversions from feet to meters here - | > almost certainly lossless. | Unless I'm mistaken, this is only a theoretically lossless | operation. In | the real world of precision issues and whatnot, a conversion | back and forth | might result in a slightly different answer. Given the fact | that a number | divided by 10 and then multiplied by 10 might not result in | the original | number, the feet-meter conversion certainly can't be made | lossless. Even | worse, although converting from feet to inches is lossless (excluding | overflow considerations), converting from inches to feet is | not lossless. I really hate floating point! You are right - I could have chosen better words. But it is only a teeny-weeny loss compared to the catastrophic int to char, or even double to float, that people really, really hate! Paul -- Paul A Bristow Prizet Farmhouse, Kendal, Cumbria UK LA8 8AB Phone and SMS text +44 1539 561830, Mobile and SMS text +44 7714 330204 mailto: pbristow@hetp.u-net.com www.hetp.u-net.com