[cfe-dev] How do i properly address Clang's UTF-8 string literal warning?

[Aleksandr Medvedev via cfe-dev]

Hello, folks! (And sorry in advance if i'm writing to the wrong address
with my question.)

Recently i've come across a clang warning next to this simple line of code:

auto message = u8"Текст";

which says as follows:

> type of UTF-8 string literal will change from array of const char to array
> of const char8_t in C++20


That is a warning which comes with  -W-c++20-compat flag
<https://clang.llvm.org/docs/DiagnosticsReference.html#wc-20-compat> and
the answer I'm looking for is how to properly make this warning
disappear (without suppressing or disabling it). I tried a few approaches
from the P1423R2
<http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1423r2.html#remediation>
document,
including:

   - explicit conversion function approach
   <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1423r2.html#conversion_fns>
   - emulation with macroses
   <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1423r2.html#emulate>
   - reinterpret_cast u8 literals to char
   <http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2019/p1423r2.html#reinterpret_cast>

Unfortunately neither seems to work. The warning persists probably just
because of the fact of having u8 literal no matter whether i have
overloaded functions, wrap it with macroses or try to cast it to "standard"
char. I wonder if i'm missing something? Or the only suitable solution for
this warning to vanish is to not use u8 literals in my code?

Thanks in advance.
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