[boost] Multi Index Container - key extractor on a member of a member

Hi All, Is it possible/exist a key extractor that can extract a member of a member of the base type stored by the Multi Index container. I tried to do this with the standard member extractor but failed to do so. Thanks in advnace, Avi Revivo -- View this message in context: http://www.nabble.com/Multi-Index-Container---key-extractor-on-a-member-of-a... Sent from the Boost - Dev mailing list archive at Nabble.com.