add some comments, add a dyn_cast method.
authorChris Lattner <sabre@nondot.org>
Sun, 29 Mar 2009 07:03:30 +0000 (07:03 +0000)
committerChris Lattner <sabre@nondot.org>
Sun, 29 Mar 2009 07:03:30 +0000 (07:03 +0000)
commit3a9fe06bfe30da6fb1e0a540f05877c3640c7335
treeee83cce56aba14d58f641d2614a5610b7eb78783
parentf341a47d10501bc69b5d4d2217992bb6e08668d8
add some comments, add a dyn_cast method.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@67992 91177308-0d34-0410-b5e6-96231b3b80d8
include/llvm/ADT/PointerUnion.h