--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/clang-tools-extra/clang-tidy/utils/FixItHintUtils.h	Thu Feb 13 15:10:13 2020 +0900
@@ -0,0 +1,57 @@
+//===--- FixItHintUtils.h - clang-tidy---------------------------*- 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_CLANG_TIDY_UTILS_FIXITHINTUTILS_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_FIXITHINTUTILS_H
+
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/Sema/DeclSpec.h"
+
+namespace clang {
+namespace tidy {
+namespace utils {
+namespace fixit {
+
+/// Creates fix to make ``VarDecl`` a reference by adding ``&``.
+FixItHint changeVarDeclToReference(const VarDecl &Var, ASTContext &Context);
+
+/// Creates fix to make ``VarDecl`` const qualified.
+FixItHint changeVarDeclToConst(const VarDecl &Var);
+
+/// This enum defines where the qualifier shall be preferably added.
+enum class QualifierPolicy {
+  Left,  // Add the qualifier always to the left side, if that is possible.
+  Right, // Add the qualifier always to the right side.
+};
+
+/// This enum defines which entity is the target for adding the qualifier. This
+/// makes only a difference for pointer-types. Other types behave identical
+/// for either value of \c ConstTarget.
+enum class QualifierTarget {
+  Pointee, /// Transforming a pointer attaches to the pointee and not the
+           /// pointer itself. For references and normal values this option has
+           /// no effect. `int * p = &i;` -> `const int * p = &i` or `int const
+           /// * p = &i`.
+  Value,   /// Transforming pointers will consider the pointer itself.
+           /// `int * p = &i;` -> `int * const = &i`
+};
+
+/// \brief Creates fix to qualify ``VarDecl`` with the specified \c Qualifier.
+/// Requires that `Var` is isolated in written code like in `int foo = 42;`.
+Optional<FixItHint>
+addQualifierToVarDecl(const VarDecl &Var, const ASTContext &Context,
+                      DeclSpec::TQ Qualifier,
+                      QualifierTarget CT = QualifierTarget::Pointee,
+                      QualifierPolicy CP = QualifierPolicy::Left);
+} // namespace fixit
+} // namespace utils
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_UTILS_FIXITHINTUTILS_H