How to display the inheritance tree?

Scott Walters scott at
Fri Jan 23 13:41:29 CST 2004

# GraphViz::ISA - graph inheritance trees
# Devel::Symdump - same, but in ASCII

>From =)

One of my current tasks is to chart CPAN the same way that Java
API reference documents chart inheritance between the Java
standard objects. 


On  0, Michael Friedman <friedman at> wrote:
> Folks,
> So, here I am in the debugger with a method that isn't getting found 
> when I know for sure it's in the ISA tree *someplace*. I found the 
> problem using ->isa() and ->can(), but it just raised the larger issue:
> Is there a way to display the entire contents of the inheritance tree, 
> given a starting class?
> I'm guessing it gets checked on-the-fly, so you'd have to walk all the 
> @ISAs yourself, but is there a better way? Does perl preprocess this 
> sort of thing and store it somewhere it can be seen?
> As I said, I fixed my immediate problem, but now I'm really curious 
> about this.
> Any thoughts?
> Thanks,
> -- Mike
> ---------------------------------------------------------------------
> Michael Friedman                  HighWire Press, Stanford Southwest
> Phone: 480-456-0880                                   Tempe, Arizona
> FAX:   270-721-8034                  <friedman at>
> ---------------------------------------------------------------------

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