Improved check is_open_canonical_projection

The check looks for 1 canonical projection applied to a meta/evar.
This fails to deal with telescopes that generate unification problems
containing something like "(pi_1 (pi_2 ?))" that is indeed a "stuck"
canonical projection but not of the form recognized by the previous
implementation. The same holds when pi_2 is a general function not
producing a constructor.

This patch checks if the argument of the canonical projection weak head
reduces to a constructor calling whd_betadeltaiota.

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@14645 85f007b7-540e-0410-9357-904b9bb8a0f7

0 files changed, 0 insertions, 0 deletions