[clang] [clang] Introduce [[clang::lifetime_capture_by(X)]] (PR #111499)

[Haojian Wu via cfe-commits]

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@@ -1760,6 +1760,10 @@ class Sema final : public SemaBase {
   /// Add [[gsl::Pointer]] attributes for std:: types.
   void inferGslPointerAttribute(TypedefNameDecl *TD);
 
+  LifetimeCaptureByAttr *ParseLifetimeCaptureByAttr(const ParsedAttr &AL,
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hokein wrote:

nit: per LLVM code style, function name should start with a lower case letter, `openFile`

Is this function used in other place? I only see it is used in the implementation of `LazyProcessLifetimeCaptureByParams`, it is not necessary to be in the public header.

https://github.com/llvm/llvm-project/pull/111499