Hi Asif,

On Apr 13, 2011, at 8:04 AM, asif saeed wrote:
I frequently come across the term "intrusive" in boost users mailing list. What does it mean? Would any of you please provide a reference such as an online reference/link, etc?

It refers to the technique of installing bookkeeping data within the object.

See intrusive_ptr smart pointer
http://www.boost.org/doc/libs/1_46_1/libs/smart_ptr/intrusive_ptr.html

Or Boost.Intrusive containers
http://www.boost.org/doc/libs/1_46_1/doc/html/intrusive.html

HTH,
Gordon