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[clang] Clang should warn for ignored result of string literals operators #169315

@H-G-Hristov

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@H-G-Hristov

This came up during a review: #169010 (comment)

Maybe Clang should warn when string and string_view literals operator result is unused:

  ""s;
  L""s;

  ""sv;
  L""sv;

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    clang:diagnosticsNew/improved warning or error message in Clang, but not in clang-tidy or static analyzer

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