[pve-devel] [PATCH v2 qemu-server 3/3] migrate: add live-migration of replicated disks

[Thomas Lamprecht]

On 3/17/20 11:21 AM, Stefan Reiter wrote:
>> +            $local_volumes->{$opt} = $conf->{${opt}};
> 
> Does $conf->{${opt}} have too many brackets or is this another arcane perl syntax I've yet to discover? (iow. why not just $conf->{$opt} ?)

It's not that arcane, you surely used it sometimes, for example:

* in strings to separate variable from text: "${foo}bar"
* to treat a hashrefs element as hash: keys %{$foo->{bar}}
* to treat a hashrefs element as array: @{$foo->{bar}}

so yes, it isn't useful here and would be nicer to just be $opt, but
${opt} is the same thing :)