Is it really so far-fetched?

 - reflection-based metaprogramming is coming into C++

 - the reflection will also read user code (from the view of a library using reflection on user-provided code or classes)

 - it is possible and supported to use unicode in C++ identifiers

 - we probably need all kind of constexpr functions supporting string processing at compile-time

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Von: Thiago Macieira via Std-Proposals <std-proposals@lists.isocpp.org>

You meant reflection-based metaprogramming. I'd say this is a contrived example
that should not be used as a use-case.