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At least is a proof existence that it can be done.

• flohofwoe 2y ago
  That doesn't mean much unfortunately, Clang had a fully working C99 designated initialization in C++ for many years, but the designated initialization that ended up in C++20 is only a butchered version of the full feature set despite Clang clearly demonstrating that it's possible to integrate the full C99 designated init feature set into C++.