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diff --git a/clang-tools-extra/clang-tidy/modernize/ShrinkToFitCheck.h b/clang-tools-extra/clang-tidy/modernize/ShrinkToFitCheck.h
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+//===--- ShrinkToFitCheck.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_SHRINKTOFITCHECK_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H
+
+#include "../ClangTidy.h"
+
+namespace clang {
+namespace tidy {
+namespace modernize {
+
+/// Replace copy and swap tricks on shrinkable containers with the
+/// `shrink_to_fit()` method call.
+///
+/// The `shrink_to_fit()` method is more readable and more effective than
+/// the copy and swap trick to reduce the capacity of a shrinkable container.
+/// Note that, the `shrink_to_fit()` method is only available in C++11 and up.
+class ShrinkToFitCheck : public ClangTidyCheck {
+public:
+  ShrinkToFitCheck(StringRef Name, ClangTidyContext *Context)
+      : ClangTidyCheck(Name, Context) {}
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+};
+
+} // namespace modernize
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_SHRINKTOFITCHECK_H