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-rw-r--r--clang/lib/Sema/SemaTemplateVariadic.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/lib/Sema/SemaTemplateVariadic.cpp b/clang/lib/Sema/SemaTemplateVariadic.cpp
index 3326b93..95a7478 100644
--- a/clang/lib/Sema/SemaTemplateVariadic.cpp
+++ b/clang/lib/Sema/SemaTemplateVariadic.cpp
@@ -18,6 +18,7 @@
#include "clang/Sema/ScopeInfo.h"
#include "clang/Sema/SemaInternal.h"
#include "clang/Sema/Template.h"
+#include <optional>
using namespace clang;