Dear Boost members, I have designed a smart pointer that relies on the type system to offer safe and flexible automatic memory management at no runtime cost. It combines single ownership as in std::unique_ptr and reliable access from multiple places as in std::shared_ptr with some additional features. I believe it to be about as safe and practically useful as a smart pointer in C++11 could get. Further explanation and a proof-of-concept implementation is available over here: https://github.com/jgonggrijp/rich-typed-pointers There is no license yet, but you have my explicit permission to try the library and the example programs at your own risk. :-) Could this library be useful addition to Boost? I look forward to your comments. Thanks in advance, -Julian PS: a possible minor seed for discussion is the current lack of an implicit cast to bool. I agree with Jeff Flinn's argument why the implicit cast may be desirable [1]. However, it interferes with the comparison operators when one of the operands should be implicitly cast to weak_ptr, as explained in [2]. I could repeat myself and write comparison functions for all possible overloads, but this seems inelegant. [1] http://boost.2283326.n4.nabble.com/Looking-for-thoughts-on-a-new-smart-point... [2] https://github.com/jgonggrijp/rich-typed-pointers/commit/89fcf2821cb39bbb9fc...