Empty sets

[Alexander Shikov]

Hi all!

Is there a way to pass empty set to function?

For example, function
function bgp_in (prefix set plist)
{ ... }

called either as 'import where bgp_in([])' or as 'import where bgp_in()'
causes error.

And further, how to detect in function whether set is defined?
Does built-in 'defined()' function apply to variables or function arguments?

Thanks in advance!

-- 
Alexander Shikov
Technical Staff, Digital Telecom IX
Tel.: +380 44 201 14 07
http://dtel-ix.net/