Code search for developers; what features to include in MVP?

On a couple occasions, I've needed to be able to search for syntax without knowing what it's called. Also, sometimes I want to search for a code snippet and see how other people use some function or construct. I've found that google can often be lacking for code search purposes (not supporting special characters or regex), so I'd like to scratch my own itch and build a code search engine.

What I've done:
As of now, my search engine supports both exact and regex matching and I've indexed a portion of code snippets from StackOverflow. It works on special character queries that fail in other search engines like '>>=' or '.='. My concern is whether I have enough for an MVP (after I finish indexing SO and possibly GitHub). Since IH is mostly developers: I'd like to know what other features you would like and whether it sounds useful to you so far. Any thoughts on monetization would be great too.

Existing solutions:
There exist a couple code search engines online for example http://opensearch.krugle.org/ and https://searchcode.com/, however krugle seems to have a limited number of projects indexed while searchcode gives false positives for even simple queries like '>>='. I feel like there is room for me here.