First, note that \&Foo::new is wrong for methods. It'll break if the method is inherited. That's why can should be used instead.

How do you get a ref to a method

my $method_ref = $obj_or_class->can('method');
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or even just

my $method_name = 'method';
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You call it as follows:

$obj_or_class->$method_ref()
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$obj_or_class->$method_name()
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It seems you might actually want to get a code reference to a method call. Yes, the following is necessary, because you can't get a code reference to an operator. They have insufficient information to be executed.

$ref = sub { $obj_or_class->new(@_) }
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