================
@@ -750,8 +750,33 @@ void InitListChecker::FillInEmptyInitForField(unsigned
Init, FieldDecl *Field,
if (Field->hasInClassInitializer()) {
if (VerifyOnly)
return;
-
- ExprResult DIE = SemaRef.BuildCXXDefaultInitExpr(Loc, Field);
+ ExprResult DIE;
+ {
+ // Enter a lifetime extension context, then we can support lifetime
+ // extension of temporary created by aggregate initialization using a
+ // default member initializer (DR1815 https://wg21.link/CWG1815).
+ //
+ // In a lifetime extension context, BuildCXXDefaultInitExpr will clone
+ // the initializer expression on each use and the temporaries which
+ // actually bound to a reference member should be extended here.
+ //
+ // FIXME: In default member initializer, lifetime extension context
will
+ // collect the MaterializedTemporaryExprs which bound to a reference
----------------
yronglin wrote:
I've extend `InLifetimeExtendingContext` flag to resolve this FIXME.
https://github.com/llvm/llvm-project/pull/97308
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