caller is more reliable for this. 
#!/usr/bin/perl

package Foo;

sub new {
  # ...
}

# other stuff

if (!caller()) {
  my $foo = new Foo;
  # test foo's methods, etc
}

1;

[download]

In reply to Re^6: At which line number did the print statement occure? by ikegami
in thread At which line number did the print statement occure? by jeanluca

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