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-rw-r--r--clang/lib/Tooling/InterpolatingCompilationDatabase.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
index 5e424cc..338797c 100644
--- a/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
+++ b/clang/lib/Tooling/InterpolatingCompilationDatabase.cpp
@@ -58,6 +58,7 @@
#include "llvm/Support/StringSaver.h"
#include "llvm/Support/raw_ostream.h"
#include <memory>
+#include <optional>
namespace clang {
namespace tooling {