Hi,
Which of the 2 options do you prefer?
Generally I prefer generic rather than specific solutions, so I guess I'd go for the latter - but would it be better called "indeterminate_result_error" ?
Yep you're probably right, as English is not my native language you surely master those aspects better than me.
For the throw_on_error policy, do you see any existing exception (std or boost) that could fit or is it better to create a new one?
Not sure, the only obvious one is domain_error. Otherwise we're left to deriving a new exception type: would this gain us anything - storing the return value maybe?
I had thought about domain_error too. I don't think storing the return value in a new exception type would really bring anything valuable, so I think we can go with domain_error.
For the errno_on_error policy, how about setting errno to EDOM and returning a NaN?
Yep, that's sensible, although should we return the value passed to the function: that would be consistent with C99: return 1 but optionally set errno as well.
OK if you think it's more consistent with C99, let's return the same value as ignore_error and set errno. I should have the time to implement all that next week. Regards Bruno