[clang-tools-extra] [clang-tidy] Fix bugprone-tagged-union-member-count false-positive (PR #135831)

[Julian Schmidt via cfe-commits]

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/135831 at github.com>


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@@ -9,6 +9,8 @@ different from the number of data members inside the union.
 A struct or a class is considered to be a tagged union if it has
 exactly one union data member and exactly one enum data member and
 any number of other data members that are neither unions or enums.
+Furthermore, the types of the union and the enum members must 
+not come from a system header files or the ``std`` namespace
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5chmidti wrote:

Given the block below, this might be redundant. (Also, wording)

https://github.com/llvm/llvm-project/pull/135831