Primitive E module for a latch.
We use this to implement vl2014::*vl-1-bit-latch*.
Definition: *esim-latch*
(defconst *esim-latch* '(:n *esim-latch* :x (:out ((|q| ite |clk| |d| s)) :nst ((s ite |clk| |d| s))) :i ((|clk|) (|d|)) :o ((|q|))))