bgp_path multiple AS match on single rule

[Javor Kliachev]

Hello,

I'm wondering, is there any way to configure following example to single 
rule only.

if bgp_path ~ [= * 100 * =] then return false;
if bgp_path ~ [= * 200 * =] then return false;
if bgp_path ~ [= * 300 * =] then return false;
if bgp_path ~ [= * 400 * =] then return false;

On this way, If we want to filter many ASs, it seems that we should 
generate too much rows.

On Cisco we can implement it like following example:

AS path access list 85
      deny _(100|200|300|400)_
      permit .*

Thanks in advance!

Best~
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