I'm not sure whether you'd consider this more compact, but it does make it easier to see the path of keys you're checking: 
use List::Util 'reduce';
if (reduce { $a && exists $$a{$b} ? $$a{$b} : undef } 
    \%foo, 'bar', 'baz', 'troz')
{
}

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In reply to Re: recursive exists in perl by Anonymous Monk
in thread recursive exists in perl by Anonymous Monk

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