Hi, 

Being able to create constexpr binding of non-trivial types seems useful for reflection and metaprogramming. For example, for querying and storing a name that is intended to be used during the runtime. This can be done (as in the TS) with const char*, but 1/ this is not very ergonomic and 2/ does this imply that every data resulting from a reflection query will be stored in the binary of the TU, regardless of whether or not it's needed? (I think it does).