Backtrack on activating scopes with type casts (was r15978).

IT happens that there are some other uses of casts, e.g. in nat_int de
MathClasses which uses a notation 0 for some class constructor zero,
and a cast (0:nat) to force this notation 0 to represent the instance
O in nat of the class of types having a zero (eventually, 0,
i.e. "zero nat O" and "O" are convertible but the information of being
a class instance is lost).

git-svn-id: svn+ssh://scm.gforge.inria.fr/svn/coq/trunk@16024 85f007b7-540e-0410-9357-904b9bb8a0f7

0 files changed, 0 insertions, 0 deletions