https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116399
--- Comment #7 from Jonathan Wakely <redi at gcc dot gnu.org> --- "Note that this view is not common_range because it can be implemented more efficiently without that requirement, and, being copyable, it can be adapted into one." and "We found that aliases can be efficiently stored and looked up in a sorted list of alias/mib pairs. Making a common_range of aliases_view would force an implementation to find the end of the list of aliases for a particular encoding, which is slightly efficient than what is possible, so this is not proposed. Mostly, we found little use for it to be a common_range."
