Proposed resolution:

This wording is relative to N5032.

1. Modify [meta.syn] as indicated:

   -3- Any function in namespace `std::meta` whose return type is `string_view` or `u8string_view` returns an object `V` such that `V.data()[V.size()]` equals `'\0'`. Each element of the range `V.data()` + [0, `V.size()`] is a potentially non-unique object with static storage duration that is usable in constant expressions ([intro.object], [expr.const]); a pointer to such an element is not suitable for use as a template argument for a constant template parameter of pointer type ([temp.arg.nontype]).

[ Croydon 2026-03-25; move to Immediate. ]

We are missing a statement about the lifetime and other properties of the strings returned from the reflection functions.