Commit caf69e06 authored by Robbert Krebbers's avatar Robbert Krebbers

Split IsPure into IntoPure and FromPure.

This tweak allows us to declare pvs as an instance of FromPure (it is not
an instance of IntoPure), making some tactics (like iPureIntro and done)
work with pvs too.
parent e2a3396a
Pipeline #1785 passed with stage