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diff --git a/clang-tools-extra/clang-tidy/modernize/UseNodiscardCheck.h b/clang-tools-extra/clang-tidy/modernize/UseNodiscardCheck.h
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+++ b/clang-tools-extra/clang-tidy/modernize/UseNodiscardCheck.h
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+//===--- UseNodiscardCheck.h - clang-tidy -----------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USENODISCARDCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USENODISCARDCHECK_H
+
+#include "../ClangTidy.h"
+
+namespace clang {
+namespace tidy {
+namespace modernize {
+
+/// \brief Add ``[[nodiscard]]`` to non-void const-member functions with no
+/// arguments or pass-by-value or pass by const-reference arguments.
+/// \code
+///    bool empty() const;
+///    bool empty(const Bar &) const;
+///    bool empty(int bar) const;
+/// \endcode
+/// Is converted to:
+/// \code
+///    [[nodiscard]] bool empty() const;
+///    [[nodiscard]] bool empty(const Bar &) const;
+///    [[nodiscard]] bool empty(int bar) const;
+/// \endcode
+///
+/// For the user-facing documentation see:
+/// http://clang.llvm.org/extra/clang-tidy/checks/modernize-use-nodiscard.html
+class UseNodiscardCheck : public ClangTidyCheck {
+public:
+  UseNodiscardCheck(StringRef Name, ClangTidyContext *Context);
+  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+
+private:
+  const std::string NoDiscardMacro;
+};
+
+} // namespace modernize
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_USENODISCARDCHECK_H