On Nov 22, 2011, at 10:14 AM, Brendan Eich wrote: > On Nov 22, 2011, at 9:37 AM, Allen Wirfs-Brock wrote: > ... > >> Unfortunately, as it now stands you have to use the implementation >> dependent message property value to actually identify specific exceptions. > > *Error.prototype.name is normatively specified for all the built-in Error > constructors.
Yes, but name doesn't discriminate the actual cause of the exception. There is no normative way to distinguish a RangeError generated by 1.0.toPrecision(40) from a RangeError generated by (new Array(1.2)) > > >> I wonder if for new exception occurrences (in our specs.) we should specify >> unique implementation independent name property values. To do so, we would >> have to develop a meaningful fine-grained naming scheme. > > This would fit in just Error, as JJB just suggested. The difference is that instanceof can be used to detect RageError, TypeError, etc. instances Allen _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
