--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang-tools-extra/clang-include-fixer/InMemorySymbolIndex.h	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,37 @@
+//===-- InMemorySymbolIndex.h -----------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+#ifndef LLVM_CLANG_TOOLS_EXTRA_INCLUDE_FIXER_INMEMORYSYMBOLINDEX_H
+#define LLVM_CLANG_TOOLS_EXTRA_INCLUDE_FIXER_INMEMORYSYMBOLINDEX_H
+
+#include "SymbolIndex.h"
+#include <map>
+#include <string>
+#include <vector>
+
+namespace clang {
+namespace include_fixer {
+
+/// Xref database with fixed content.
+class InMemorySymbolIndex : public SymbolIndex {
+public:
+  InMemorySymbolIndex(
+      const std::vector<find_all_symbols::SymbolAndSignals> &Symbols);
+
+  std::vector<find_all_symbols::SymbolAndSignals>
+  search(llvm::StringRef Identifier) override;
+
+private:
+  std::map<std::string, std::vector<find_all_symbols::SymbolAndSignals>>
+      LookupTable;
+};
+
+} // namespace include_fixer
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_INCLUDE_FIXER_INMEMORYSYMBOLINDEX_H