Hook::LexWrap allows you to install a pre- or post-wrapper (or both)
around an existing subroutine. Unlike other modules that provide this
capacity (e.g. Hook::PreAndPost and Hook::WrapSub), Hook::LexWrap
implements wrappers in such a way that the standard `caller' function
works correctly within the wrapped subroutine.
from Deanna Phillips <deanna@sdf.lonestar.org>
