Re: [boost] Is there any interest in non-owning pointer-like types?

I agree we need this vocabulary type. GSL guidelines are for code that will be written from scratch with C++14/C++17. The reality is that we have tons of C++98 code. Pretending that T* is a not owning pointer because we have gsl::owner is not useful in a legacy code project. I'm not saying that gsl::owner is not useful. Sorry, one additional comment. AFAIK, the GSL is aimed at those writing new C++ code, those updating old C++ code, and those making low-level C++ code safer. For example, `owner` is for use where something like `unique_ptr` cannot be used (either legacy code, or perhaps the library implementation of `unique_ptr` itself!)