"Paul A. Bristow" <[EMAIL PROTECTED]> writes: | I think this would be excellent (and overdue). It needs to support double and | long double (and facilitate UDTs too if possible). | | There is also the matter of signalling and quiet NaN. Although signalling NaN | may cause an hardware exception if enabled, I suspect it is more useful if isnan | returns ture for both types of NaN.
Agreed. It is no question that isnan should distinguish between Quiet NaNs and Signalling NaNs. They are all NaNs. | At least we should make this clear. I | think this is what MSVC 7.1 does but the documentation is thin. | | There is also a single IEEE FP pattern called 'indeterminate' or what Intel call | 'NotAVal" (ox1fffe000...) which might become useful as a Portable Standard | "missing value" marker if portably supported? I won't take that road. Signalling NaNs are used to indicate missing initialization values. | And can anyone help with allowing one to easily customise the display of NaNs? | (and infs, max, min...?) I believe that a new (derived) num_put facet is the way | to do this. Does anyone have an actual implementation of this to contribute | too? I'm willing to volunteer but I'm not sure I really understand the question. Can you elaborate a little bit? -- Gaby _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
