[Gretl-devel] Re: slight convenience extension to funcerr()
Am 17.03.2020 um 21:49 schrieb Allin Cottrell:
On Mon, 16 Mar 2020, Sven Schreiber wrote:
>
> That's exactly what I was thinking, too. OTOH funcerr() was introduced
> less than 3 months ago (not counting the pre-release phase), so maybe it
> wouldn't be too bad to break compatibility here? (After a thorough check
> of the packages, of course.)
The signature of funcerr() is now revised:
first arg: boolean condition (non-zero means error)
second arg: error message string
Among the current function packages, only Artur's assertion.gfn uses the
prior form (with a single string argument). That form is still accepted
for now; to trigger the new form you must supply two arguments.
Excellent, thanks! If the single-argument form is supposed to go away
some day, then I'd suggest to make the first argument optional,
defaulting to True. (Not sure right now whether for built-in functions
we can write just a comma to leave that arg out, like we can with
user-defined functions that have defaults.)
thanks
sven