Re: about 'fail'

[Oliver Kroth <oliver.kroth@...>]

I would like to stay with that a function on error returns something 
that evaluates to nil, not false.

there are function returning a boolean value, which in case of failure 
need to return a third, distinct value. nil.
Think of a function that for a file name returns whether it is a 
directory or not.

--
Oliver Kroth
> For old libraries and functions, changing nil to false may cause
> incompatibilites. New libraries and functions, however, are free
> to use false instead of nil. The new function 'debug.setcstacklimit'
> in the standard library does that.
>
> -- Roberto