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-rw-r--r--clang/lib/Basic/SourceManager.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/lib/Basic/SourceManager.cpp b/clang/lib/Basic/SourceManager.cpp
index 63dd4d6..6fbeb38 100644
--- a/clang/lib/Basic/SourceManager.cpp
+++ b/clang/lib/Basic/SourceManager.cpp
@@ -38,6 +38,7 @@
#include <cstddef>
#include <cstdint>
#include <memory>
+#include <optional>
#include <tuple>
#include <utility>
#include <vector>