I'm Canadian. I get searched all the time by both sides. Canadian side has been worse for me, so far.
I really like going to other countries, their customs tend to be reasonable. coming back home is always a nerve racking experience.
I haven't been asked for my phone yet, but have been asked for my camera.
I'm being drawn more and more to paying for online storage/sync solutions and clearing my phone and laptop before traveling to the USA or Canada. actually more worried about Canada.
this is a lot like instaparse, which I think has a much better api, but is on the jvm, and may not perform as well. I haven't used it to perform something like a regex capture, but it may not be hard to do so.