Correctly handle packs for variadic type traits.
I'm not sure how to write a test for this; the following shows the
difference in -ast-dump:
template <int x> struct A {};
template <class T> struct B { };
template <class ...Args> using C = A<(__is_trivially_constructible(Args...))>;
template <class ...Args> using D = C<B<Args>...>;
However, I can't seem to write a test that triggers a visible difference
in behavior.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186726 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/TreeTransform.h b/lib/Sema/TreeTransform.h
index ef8049a..34fdbad 100644
--- a/lib/Sema/TreeTransform.h
+++ b/lib/Sema/TreeTransform.h
@@ -7926,6 +7926,19 @@
if (To.isNull())
return ExprError();
+ if (To->containsUnexpandedParameterPack()) {
+ To = getDerived().RebuildPackExpansionType(To,
+ PatternTL.getSourceRange(),
+ ExpansionTL.getEllipsisLoc(),
+ NumExpansions);
+ if (To.isNull())
+ return ExprError();
+
+ PackExpansionTypeLoc ToExpansionTL
+ = TLB.push<PackExpansionTypeLoc>(To);
+ ToExpansionTL.setEllipsisLoc(ExpansionTL.getEllipsisLoc());
+ }
+
Args.push_back(TLB.getTypeSourceInfo(SemaRef.Context, To));
}