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

[Utkarsh Saxena via cfe-commits]

================
@@ -1889,6 +1889,40 @@ def LifetimeBound : DeclOrTypeAttr {
   let SimpleHandler = 1;
 }
 
+def LifetimeCaptureBy : DeclOrTypeAttr {
+  let Spellings = [Clang<"lifetime_capture_by", 0>];
+  let Subjects = SubjectList<[ParmVar, ImplicitObjectParameter], ErrorDiag>;
+  let Args = [VariadicParamOrParamIdxArgument<"Params">];
+  let Documentation = [LifetimeCaptureByDocs];
+  let LangOpts = [CPlusPlus];
+  let AdditionalMembers = [{
+private:
+  SmallVector<IdentifierInfo*, 1> ArgIdents;
+  SmallVector<SourceLocation, 1> ArgLocs;
+
+public:
+  static constexpr int THIS = 0;
+  static constexpr int INVALID = -1;
+  static constexpr int UNKNOWN = -2;
+  static constexpr int GLOBAL = -3;
+
+  void setArgs(SmallVector<IdentifierInfo*, 1>&& Idents,
----------------
usx95 wrote:

Seems to work. Done.

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