What is the function of
と in とある?
It doesn't seem to be the particle
と--it doesn't seem to attach to whatever comes before it, which particles generally do. It also doesn't seem to fit any of the uses of the particle
と described my in books. So, I guess it must be something other than a particle.
However, in another comment, Chocolate points out that 広辞苑 says
と is a particle. I'm not sure how to reconcile this with the other information I've found so far. (I don't have 広辞苑 myself, so I can't verify the quote.) As I said before, it doesn't seem to behave like a particle to me, because it doesn't attach to what comes before it. Is 広辞苑 wrong?
What is this