[clang] Thread Safety Analysis: Support reentrant capabilities (PR #137133)

[Marco Elver via cfe-commits]

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@@ -1831,15 +1852,15 @@ void BuildLockset::handleCall(const Expr *Exp, const NamedDecl *D,
     assert(!Self);
     const auto *TagT = Exp->getType()->getAs<TagType>();
     if (D->hasAttrs() && TagT && Exp->isPRValue()) {
-      std::pair<til::LiteralPtr *, StringRef> Placeholder =
-          Analyzer->SxBuilder.createThisPlaceholder(Exp);
+      auto Placeholder = Analyzer->SxBuilder.createThisPlaceholder(Exp);
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melver wrote:

Growing this pair/tuple become a little too complex, so I just made createThisPlaceholder return a CapabilityExpr struct right away.

https://github.com/llvm/llvm-project/pull/137133