================
@@ -3229,6 +3231,52 @@ void Sema::CheckArgAlignment(SourceLocation Loc,
NamedDecl *FDecl,
<< ParamName << (FDecl != nullptr) << FDecl;
}
+void Sema::checkLifetimeCaptureBy(FunctionDecl *FD, bool IsMemberFunction,
+ const Expr *ThisArg,
+ ArrayRef<const Expr *> Args) {
+ auto GetArgAt = [&](int Idx) -> Expr * {
+ if (Idx == LifetimeCaptureByAttr::GLOBAL ||
+ Idx == LifetimeCaptureByAttr::UNKNOWN)
+ return nullptr;
+ if (IsMemberFunction && Idx == 0)
+ return const_cast<Expr *>(ThisArg);
+ return const_cast<Expr *>(Args[Idx - int(IsMemberFunction)]);
+ };
+ for (unsigned I = 0; I < FD->getNumParams(); ++I) {
+ auto *CapturedByAttr =
+ FD->getParamDecl(I)->getAttr<LifetimeCaptureByAttr>();
+ if (!CapturedByAttr)
+ continue;
+ for (int CapturingParamIdx : CapturedByAttr->params()) {
+ Expr *Capturing = GetArgAt(CapturingParamIdx);
+ Expr *Captured = GetArgAt(I + IsMemberFunction);
+ CapturingEntity CE{Capturing};
+ // Ensure that 'Captured' outlives the 'Capturing' entity.
+ checkExprLifetime(*this, CE, Captured);
+ }
+ }
+ // Check when the 'this' object is captured.
+ if (IsMemberFunction) {
+ TypeSourceInfo *TSI = FD->getTypeSourceInfo();
+ if (!TSI)
+ return;
+ AttributedTypeLoc ATL;
----------------
usx95 wrote:
I do not fully understand what is the comment I need to add here. Can you
please elaborate?
Are you referring to the variable `ATL` here ?
https://github.com/llvm/llvm-project/pull/115921
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