[clang] [llvm] [clang] Implement lifetime analysis for lifetime_capture_by(X) (PR #115921)

[Boaz Brickner via cfe-commits]

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@@ -3922,16 +3922,41 @@ def LifetimeCaptureByDocs : Documentation {
   let Category = DocCatFunction;
   let Content = [{
     Similar to `lifetimebound`_, the ``lifetime_capture_by(X)`` attribute on a function
-parameter or implicit object parameter indicates that that objects that are referred to
-by that parameter may also be referred to by the capturing entity ``X``.
+parameter or implicit object parameter indicates that objects that are referred to by
+that parameter may also be referred to by a capturing entity ``X``.
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bricknerb wrote:

How about

... indicates that X may refer to the object referred by that parameter.

https://github.com/llvm/llvm-project/pull/115921