I like the feature in Data::Dive that allows me to assign variables to some place in a hash: 
DiveVal( $root, \( qw( num 1 2 ) ) ) = 3;

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I'd like to do something even more general than that. I have parsed something with P::RD and have a big tree structure. I want to be able to search for specific structures and edit them using using the same sort of syntax, e.g. providing a path to find in the structure and providing a new value, or perhaps a regex replacement. I guess what I'm thinking of is like XML::Twig's ability to search and replace given a twig to find and a subroutine to execute when it is found. Is there any existing module that can do this?

In reply to XPath-like method for searching/editing structures by nglenn

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