[clang] [libcxx] [clang] Add -Wimplicit-fallthrough to -Wextra (PR #97926)

[Mark de Wever via cfe-commits]

Max =?utf-8?b?8J+RqPCfj73igI3wn5K7?= Copl
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In-Reply-To: <llvm.org/llvm/llvm-project/pull/97926 at github.com>


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@@ -3921,7 +3921,7 @@ _ForwardIterator basic_regex<_CharT, _Traits>::__parse_character_escape(
       if (__hd == -1)
         __throw_regex_error<regex_constants::error_escape>();
       __sum = 16 * __sum + static_cast<unsigned>(__hd);
-      // fallthrough
+    [[clang::fallthrough]];
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mordante wrote:

> Sorry, I'm new to contributing to LLVM. 

No problem! Welcome to LLVM!

> I will mark this PR as a Draft until the #100821 lands :)

Thanks!



https://github.com/llvm/llvm-project/pull/97926