I like this. Being able to easily filter on a certain type of result is a neat idea. One major shortcoming I commonly experience in search engines is poor supp

I like this. Being able to easily filter on a certain type of result is a neat idea. One major shortcoming I commonly experience in search engines is poor support for things like complex or custom logical symbols, bitwise operators and other non-alphanumeric strings. None of the major search engines do this well AFAIK.