Firstly, I want to apologize for my conceit for saying: ** Benefit for Boost Heap is widely used in development such as heap sort, priority queue and other graph algorithm. It also can be the container for advanced data structures. But the heaps in boost/pending and libs/pri_queue is not extendable or highly abstract. This leads to the limited usage of this library. To redevelop a new library about heaps and priority queue more abstract and more user-friendly not only can broaden the user group of Boost, but also can fix the design deficiency in boost/pending and make it more conforms to the philosophy of Boost. in my proposal. These days, I have been preparing for my proposal, especially on API design. Now I know how hard it is to design the API. I can't imagine how much effort has been spent on boost/pending when the developers of Boost decide to code for it. I really appreciate their work and feel ashamed for saying that. Sorry! ;-(. Thank you for reading. Your sincerely Tao Lin