It's close to the idea of structural regular expressions [0]. I'm still waiting for the awk from the paper. [0] http://doc.cat-v.org/bell_labs/structural_regex

It's close to the idea of structural regular expressions [0]. I'm still waiting for the awk from the paper. [0] http://doc.cat-v.org/bell_labs/structural_regexps/ http://doc.cat-v.org/bell_labs/structural_regexps/