[cgiapp] Understanding $rm_param->($self);

[Bill Catlan]

>From CGI::Application:

sub run {
 my $self = shift;
 my $q = $self->query();

 my $rm_param = $self->mode_param() || croak("No rm_param() specified");

 my $rm;

 # Support call-back instead of CGI mode param
 if (ref($rm_param) eq 'CODE') {
  # Get run-mode from subref
  $rm = $rm_param->($self);
 } else {
  # Get run-mode from CGI param
  $rm = $q->param($rm_param);
 }
...

Idiom in question:

  # Get run-mode from subref
  $rm = $rm_param->($self);

Is there a word for this idiom in the object oriented programming world - where
an object calls a method on itself and passes a reference to itself to that
method?  It seems like a kind of recursion.  It would help me to have a label
for this brain twister. :)

Thanks!

Bill Catlan


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