[clang] [clang-tools-extra] [clang] Make `InitListExpr::isExplicit()` work (PR #195175)

[Andrey Ali Khan Bolshakov via cfe-commits]

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@@ -8444,8 +8447,10 @@ ExprResult InitializationSequence::Perform(Sema &S,
     case SK_RewrapInitList: {
       Expr *E = CurInit.get();
       InitListExpr *Syntactic = Step->WrappingSyntacticList;
-      InitListExpr *ILE = new (S.Context) InitListExpr(S.Context,
-          Syntactic->getLBraceLoc(), E, Syntactic->getRBraceLoc());
+      assert(Syntactic->isExplicit());
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bolshakov-a wrote:

I'm not completely sure this always holds. Should I replace it with copying of the `IsExplicit` state from `Syntactic` to `ILE`?

https://github.com/llvm/llvm-project/pull/195175