ref: 196258441277732b8ab24471404b7fd21a81987a
parent: 3e51d386096b13c255d6aec4406f85548e9e7d63
author: Ori Bernstein <ori@eigenstate.org>
date: Sat Feb 1 06:14:46 EST 2014
Stub in more code for trait/impl.
We now make Impl nodes, and then die when we try to use them.