Given this

package Msg;
sub connect {
  my ($pkg, $to_host, $to_port, $rcvd_notification_proc) = @_;
}

# ...

Msg->connect($host, $port, \&rcvd_msg_from_server);

[download]

The connect method is not being called with three arguments, it's being called with four arguments. The first argument is the string "Msg" - that is, the part before the ->. This is how method calls work in Perl (we borrowed it from Python); the thing before the arrow gets passed in as the first argument.

"From the comment, an object was created. The reference is the anonymous hash with 2 members, and the class name is what? $pkg appears to be an undefined scalar?"

$pkg is "Msg".

"From the prior 'bless', a $conn has no methods"

Why do you think $conn has no methods? Something to do with the hash only having a couple of uninteresting key-value pairs? An object's methods have nothing to do with the blessed reference itself, but are taken from the package it is blessed into.

So because $conn is blessed into the Msg package, all the subs defined within Msg are available as methods for $conn.

package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re: Perl semi-object without a constructor by tobyink
in thread Perl semi-object without a constructor by Wiggins

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