Proposed resolution:

This wording is relative to N4971.

1. Modify [text.encoding.aliases] as indicated:

   struct text_encoding::aliases_view : ranges::view_interface<text_encoding::aliases_view> {
     constexpr implementation-defined begin() const;
     constexpr implementation-defined end() const;
   };
   

   -1- text_encoding::aliases_view models copyable, ranges::view, ranges::random_access_range, and ranges::borrowed_range.

   -2- Both ranges::range_value_t<text_encoding::aliases_view> and ranges::range_reference_t<text_encoding::aliases_view> denote const char*.

   -?- ranges::iterator_t<text_encoding::aliases_view> is a constexpr iterator ([iterator.requirements.general]).

[ Tokyo 2024-03-23; Status changed: Voting → WP. ]

[ 2024-03-12; Reflector poll ]

Set status to Tentatively Ready after seven votes in favour during reflector poll.

aliases_view::begin() and aliases_view::end() are constexpr functions, but there is no requirement that you can use the returned iterator and sentinel in constant expressions.