[Za-pm] regex ctrl char?

[Spike]

Hi All
I came across the code below while looking at a script written by 
someone who no longer works with us.

Does anyone have any idea what the /\c@/ is meant to match?

\c usually indicate a control character but I don't know what the @ is for.


if($a_username=~/\c@/ || $a_authresult=~/\c@/ || $a_password_entry=~/\c@/)
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