On Wed, 08 Jun 2005 12:35:31 -0400, Caleb Epstein wrote:
I think the specification of "fractional_seconds" in the time_duration class is unclear. Using the multi-argument constructor, and passing 1000 for the 4th argument, am I specifying milliseconds? Microseconds? Does it depend on the compile-time resolution of the class? If so (which is my suspicion), then using the 4-argument form of the ctor can lead to incorrect results if the resolution is changed. That seems like a bad thing.
Yes it does depend on the compile time resolution. In the following: time_duration td(1,2,3,1000); The fractional_seconds parameter is 1000 units. That may be 1000 microseconds or 1000 nanoseconds. In cases where the fractional_seconds exceeds the compiled resolution, the extra value is carried over into the seconds field: time_duration td(1,2,3,123456789); When compiled with microsecond resolution produces "01:04:06.456789". I've updated the documentation to try and make this behavior more clear. Thanks for bringing this to our attention. Jeff will have to address the floating point issue. Bart