BOOST_DEFUN([Optional],
[BOOST_FIND_HEADER([boost/optional.hpp])])
+# BOOST_PTR_CONTAINER()
+# ----------------
+# Look for Boost.PointerContainer
+BOOST_DEFUN([Ptr_Container],
+[BOOST_FIND_HEADER([boost/ptr_container/ptr_vector.hpp])])
# BOOST_PREPROCESSOR()
# --------------------