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diff --git a/clang-tools-extra/clang-doc/Generators.h b/clang-tools-extra/clang-doc/Generators.h
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index 00000000000..9106d2cff6a
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+++ b/clang-tools-extra/clang-doc/Generators.h
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+//===-- Generators.h - ClangDoc Generator ----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+// Generator classes for converting declaration information into documentation
+// in a specified format.
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_DOC_GENERATOR_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_DOC_GENERATOR_H
+
+#include "Representation.h"
+#include "llvm/Support/Error.h"
+#include "llvm/Support/Registry.h"
+
+namespace clang {
+namespace doc {
+
+// Abstract base class for generators.
+// This is expected to be implemented and exposed via the GeneratorRegistry.
+class Generator {
+public:
+  virtual ~Generator() = default;
+
+  // Write out the decl info in the specified format.
+  virtual bool generateDocForInfo(Info *I, llvm::raw_ostream &OS) = 0;
+};
+
+typedef llvm::Registry<Generator> GeneratorRegistry;
+
+llvm::Expected<std::unique_ptr<Generator>>
+findGeneratorByName(llvm::StringRef Format);
+
+} // namespace doc
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_DOC_GENERATOR_H