Add replace-auto_ptr check.

[angelgarcia]

Summary

Migrate replace-auto_ptr check from clang-modernize to modernize module in clang-tidy.

[alexfh]

clang-tidy/modernize/ReplaceAutoPtrCheck.h

21

Please add a class comment describing what the check does and why.

[angelgarcia]

Add check description.

[alexfh]

Looks good with one nit.

Thank you!

test/clang-tidy/modernize-replace-auto-ptr.cpp

13

Please use the full message including the [check-name] once. Please also truncate all other patterns after deprecated, to make them fit 80 columns.

[angelgarcia]

Use the full message once in the test, and truncate all the other patterns.

clang-tidy/modernize/CMakeLists.txt

 set(LLVM_LINK_COMPONENTS support)
 
 add_clang_library(clangTidyModernizeModule
   LoopConvertCheck.cpp
   LoopConvertUtils.cpp
   ModernizeTidyModule.cpp
   PassByValueCheck.cpp
+  ReplaceAutoPtrCheck.cpp
   UseAutoCheck.cpp
   UseNullptrCheck.cpp
 
   LINK_LIBS
   clangAST
   clangASTMatchers
   clangBasic
   clangLex
   clangTidy
   clangTidyReadabilityModule
   clangTidyUtils
   )

clang-tidy/modernize/ModernizeTidyModule.cpp

 //===--- ModernizeTidyModule.cpp - clang-tidy -----------------------------===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "../ClangTidy.h"
 #include "../ClangTidyModule.h"
 #include "../ClangTidyModuleRegistry.h"
 #include "LoopConvertCheck.h"
 #include "PassByValueCheck.h"
+#include "ReplaceAutoPtrCheck.h"
 #include "UseAutoCheck.h"
 #include "UseNullptrCheck.h"
 
 using namespace clang::ast_matchers;
 
 namespace clang {
 namespace tidy {
 namespace modernize {
 
 class ModernizeModule : public ClangTidyModule {
 public:
   void addCheckFactories(ClangTidyCheckFactories &CheckFactories) override {
     CheckFactories.registerCheck<LoopConvertCheck>("modernize-loop-convert");
     CheckFactories.registerCheck<PassByValueCheck>("modernize-pass-by-value");
+    CheckFactories.registerCheck<ReplaceAutoPtrCheck>(
+        "modernize-replace-auto-ptr");
     CheckFactories.registerCheck<UseAutoCheck>("modernize-use-auto");
     CheckFactories.registerCheck<UseNullptrCheck>("modernize-use-nullptr");
   }
 
   ClangTidyOptions getModuleOptions() override {
     ClangTidyOptions Options;
     auto &Opts = Options.CheckOptions;
     Opts["modernize-loop-convert.MinConfidence"] = "reasonable";
     Opts["modernize-pass-by-value.IncludeStyle"] = "llvm"; // Also: "google".
+    Opts["modernize-replace-auto-ptr.IncludeStyle"] = "llvm"; // Also: "google".
 
     // Comma-separated list of macros that behave like NULL.
     Opts["modernize-use-nullptr.NullMacros"] = "NULL";
     return Options;
   }
 };
 
 // Register the ModernizeTidyModule using this statically initialized variable.

clang-tidy/modernize/ReplaceAutoPtrCheck.h

+//===--- ReplaceAutoPtrCheck.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_REPLACE_AUTO_PTR_H
+#define LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_REPLACE_AUTO_PTR_H
+
+#include "../ClangTidy.h"
+#include "../utils/IncludeInserter.h"
+
+namespace clang {
+namespace tidy {
+namespace modernize {
+
+/// \brief Transforms the deprecated \c std::auto_ptr into the C++11 \c
+/// std::unique_ptr.
+///
+/// Note that both the \c std::auto_ptr type and the transfer of ownership are
+/// transformed. \c std::auto_ptr provides two ways to transfer the ownership,
+/// the copy-constructor and the assignment operator. Unlike most classes these
+/// operations do not 'copy' the resource but they 'steal' it.
+/// \c std::unique_ptr uses move semantics instead, which makes the intent of
+/// transferring the resource explicit. This difference between the two smart
+/// pointers requeres to wrap the copy-ctor and assign-operator with
+/// \c std::move().
+///
+/// For example, given:
+/// \code
+///   std::auto_ptr<int> i, j;
+///   i = j;
+/// \endcode
+/// This code is transformed to:
+/// \code
+///   std::unique_ptr<in> i, j;
+///   i = std::move(j);
+/// \endcode
+class ReplaceAutoPtrCheck : public ClangTidyCheck {
+public:
+  ReplaceAutoPtrCheck(StringRef Name, ClangTidyContext *Context);
+  void storeOptions(ClangTidyOptions::OptionMap &Opts) override;
+  void registerMatchers(ast_matchers::MatchFinder *Finder) override;
+  void registerPPCallbacks(CompilerInstance &Compiler) override;
+  void check(const ast_matchers::MatchFinder::MatchResult &Result) override;
+
+private:
+  std::unique_ptr<IncludeInserter> Inserter;
+  const IncludeSorter::IncludeStyle IncludeStyle;
+};
+
+} // namespace modernize
+} // namespace tidy
+} // namespace clang
+
+#endif // LLVM_CLANG_TOOLS_EXTRA_CLANG_TIDY_MODERNIZE_REPLACE_AUTO_PTR_H

clang-tidy/modernize/ReplaceAutoPtrCheck.cpp

+//===--- ReplaceAutoPtrCheck.cpp - clang-tidy------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ReplaceAutoPtrCheck.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/ASTMatchers/ASTMatchFinder.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Lex/Lexer.h"
+#include "clang/Lex/Preprocessor.h"
+
+using namespace clang;
+using namespace clang::ast_matchers;
+
+namespace clang {
+namespace tidy {
+namespace modernize {
+
+const char AutoPtrTokenId[] = "AutoPrTokenId";
+const char AutoPtrOwnershipTransferId[] = "AutoPtrOwnershipTransferId";
+
+/// \brief Matches expressions that are lvalues.
+///
+/// In the following example, a[0] matches expr(isLValue()):
+/// \code
+///   std::string a[2];
+///   std::string b;
+///   b = a[0];
+///   b = "this string won't match";
+/// \endcode
+AST_MATCHER(Expr, isLValue) { return Node.getValueKind() == VK_LValue; }
+
+/// Matches declarations whose declaration context is the C++ standard library
+/// namespace std.
+///
+/// Note that inline namespaces are silently ignored during the lookup since
+/// both libstdc++ and libc++ are known to use them for versioning purposes.
+///
+/// Given:
+/// \code
+///   namespace ns {
+///     struct my_type {};
+///     using namespace std;
+///   }
+///
+///   using std::vector;
+///   using ns:my_type;
+///   using ns::list;
+/// \code
+///
+/// usingDecl(hasAnyUsingShadowDecl(hasTargetDecl(isFromStdNamespace())))
+/// matches "using std::vector" and "using ns::list".
+AST_MATCHER(Decl, isFromStdNamespace) {
+  const DeclContext *D = Node.getDeclContext();
+
+  while (D->isInlineNamespace())
+    D = D->getParent();
+
+  if (!D->isNamespace() || !D->getParent()->isTranslationUnit())
+    return false;
+
+  const IdentifierInfo *Info = cast<NamespaceDecl>(D)->getIdentifier();
+
+  return (Info && Info->isStr("std"));
+}
+
+/// \brief Matcher that finds auto_ptr declarations.
+static DeclarationMatcher AutoPtrDecl =
+    recordDecl(hasName("auto_ptr"), isFromStdNamespace());
+
+/// \brief Matches types declared as auto_ptr.
+static TypeMatcher AutoPtrType = qualType(hasDeclaration(AutoPtrDecl));
+
+/// \brief Matcher that finds expressions that are candidates to be wrapped with
+/// 'std::move'.
+///
+/// Binds the id \c AutoPtrOwnershipTransferId to the expression.
+static StatementMatcher MovableArgumentMatcher =
+    expr(allOf(isLValue(), hasType(AutoPtrType)))
+        .bind(AutoPtrOwnershipTransferId);
+
+/// \brief Creates a matcher that finds the locations of types referring to the
+/// \c std::auto_ptr() type.
+///
+/// \code
+///   std::auto_ptr<int> a;
+///        ^~~~~~~~~~~~~
+///
+///   typedef std::auto_ptr<int> int_ptr_t;
+///                ^~~~~~~~~~~~~
+///
+///   std::auto_ptr<int> fn(std::auto_ptr<int>);
+///        ^~~~~~~~~~~~~         ^~~~~~~~~~~~~
+///
+///   <etc...>
+/// \endcode
+TypeLocMatcher makeAutoPtrTypeLocMatcher() {
+  // Skip elaboratedType() as the named type will match soon thereafter.
+  return typeLoc(loc(qualType(AutoPtrType, unless(elaboratedType()))))
+      .bind(AutoPtrTokenId);
+}
+
+/// \brief Creates a matcher that finds the using declarations referring to
+/// \c std::auto_ptr.
+///
+/// \code
+///   using std::auto_ptr;
+///   ^~~~~~~~~~~~~~~~~~~
+/// \endcode
+DeclarationMatcher makeAutoPtrUsingDeclMatcher() {
+  return usingDecl(hasAnyUsingShadowDecl(hasTargetDecl(
+                       allOf(hasName("auto_ptr"), isFromStdNamespace()))))
+      .bind(AutoPtrTokenId);
+}
+
+/// \brief Creates a matcher that finds the \c std::auto_ptr copy-ctor and
+/// assign-operator expressions.
+///
+/// \c AutoPtrOwnershipTransferId is assigned to the argument of the expression,
+/// this is the part that has to be wrapped by \c std::move().
+///
+/// \code
+///   std::auto_ptr<int> i, j;
+///   i = j;
+///   ~~~~^
+/// \endcode
+StatementMatcher makeTransferOwnershipExprMatcher() {
+  return anyOf(operatorCallExpr(allOf(hasOverloadedOperatorName("="),
+                                      callee(methodDecl(ofClass(AutoPtrDecl))),
+                                      hasArgument(1, MovableArgumentMatcher))),
+               constructExpr(allOf(hasType(AutoPtrType), argumentCountIs(1),
+                                   hasArgument(0, MovableArgumentMatcher))));
+}
+
+/// \brief Locates the \c auto_ptr token when it is referred by a \c TypeLoc.
+///
+/// \code
+///   std::auto_ptr<int> i;
+///        ^~~~~~~~~~~~~
+/// \endcode
+///
+/// The caret represents the location returned and the tildes cover the
+/// parameter \p AutoPtrTypeLoc.
+///
+/// \return An invalid \c SourceLocation if not found, otherwise the location
+/// of the beginning of the \c auto_ptr token.
+static SourceLocation locateFromTypeLoc(const TypeLoc *AutoPtrTypeLoc,
+                                        const SourceManager &SM) {
+  auto TL = AutoPtrTypeLoc->getAs<TemplateSpecializationTypeLoc>();
+  if (TL.isNull())
+    return SourceLocation();
+
+  return TL.getTemplateNameLoc();
+}
+
+/// \brief Locates the \c auto_ptr token in using declarations.
+///
+/// \code
+///   using std::auto_ptr;
+///              ^
+/// \endcode
+///
+/// The caret represents the location returned.
+///
+/// \return An invalid \c SourceLocation if not found, otherwise the location
+/// of the beginning of the \c auto_ptr token.
+static SourceLocation locateFromUsingDecl(const UsingDecl *UsingAutoPtrDecl,
+                                          const SourceManager &SM) {
+  return UsingAutoPtrDecl->getNameInfo().getBeginLoc();
+}
+
+/// \brief Verifies that the token at \p TokenStart is 'auto_ptr'.
+static bool checkTokenIsAutoPtr(SourceLocation TokenStart,
+                                const SourceManager &SM,
+                                const LangOptions &LO) {
+  SmallVector<char, 8> Buffer;
+  bool Invalid = false;
+  StringRef Res = Lexer::getSpelling(TokenStart, Buffer, SM, LO, &Invalid);
+
+  return (!Invalid && Res == "auto_ptr");
+}
+
+ReplaceAutoPtrCheck::ReplaceAutoPtrCheck(StringRef Name,
+                                         ClangTidyContext *Context)
+    : ClangTidyCheck(Name, Context),
+      IncludeStyle(Options.get("IncludeStyle", "llvm") == "llvm"
+                       ? IncludeSorter::IS_LLVM
+                       : IncludeSorter::IS_Google) {}
+
+void ReplaceAutoPtrCheck::storeOptions(ClangTidyOptions::OptionMap &Opts) {
+  Options.store(Opts, "IncludeStyle",
+                IncludeStyle == IncludeSorter::IS_LLVM ? "llvm" : "google");
+}
+
+void ReplaceAutoPtrCheck::registerMatchers(MatchFinder *Finder) {
+  Finder->addMatcher(makeAutoPtrTypeLocMatcher(), this);
+  Finder->addMatcher(makeAutoPtrUsingDeclMatcher(), this);
+  Finder->addMatcher(makeTransferOwnershipExprMatcher(), this);
+}
+
+void ReplaceAutoPtrCheck::registerPPCallbacks(CompilerInstance &Compiler) {
+  Inserter.reset(new IncludeInserter(Compiler.getSourceManager(),
+                                     Compiler.getLangOpts(), IncludeStyle));
+  Compiler.getPreprocessor().addPPCallbacks(Inserter->CreatePPCallbacks());
+}
+
+void ReplaceAutoPtrCheck::check(const MatchFinder::MatchResult &Result) {
+  SourceManager &SM = *Result.SourceManager;
+  if (const auto *E =
+          Result.Nodes.getNodeAs<Expr>(AutoPtrOwnershipTransferId)) {
+    CharSourceRange Range = Lexer::makeFileCharRange(
+        CharSourceRange::getTokenRange(E->getSourceRange()), SM, LangOptions());
+
+    if (Range.isInvalid())
+      return;
+
+    auto Diag = diag(Range.getBegin(), "use std::move to transfer ownership")
+                << FixItHint::CreateInsertion(Range.getBegin(), "std::move(")
+                << FixItHint::CreateInsertion(Range.getEnd(), ")");
+
+    auto Insertion =
+        Inserter->CreateIncludeInsertion(SM.getMainFileID(), "utility",
+                                         /*IsAngled=*/true);
+    if (Insertion.hasValue())
+      Diag << Insertion.getValue();
+
+    return;
+  }
+
+  SourceLocation IdentifierLoc;
+  if (const auto *TL = Result.Nodes.getNodeAs<TypeLoc>(AutoPtrTokenId)) {
+    IdentifierLoc = locateFromTypeLoc(TL, SM);
+  } else if (const auto *D =
+                 Result.Nodes.getNodeAs<UsingDecl>(AutoPtrTokenId)) {
+    IdentifierLoc = locateFromUsingDecl(D, SM);
+  } else {
+    llvm_unreachable("Bad Callback. No node provided.");
+  }
+
+  if (IdentifierLoc.isMacroID())
+    IdentifierLoc = SM.getSpellingLoc(IdentifierLoc);
+
+  // Ensure that only the 'auto_ptr' token is replaced and not the template
+  // aliases.
+  if (!checkTokenIsAutoPtr(IdentifierLoc, SM, LangOptions()))
+    return;
+
+  SourceLocation EndLoc =
+      IdentifierLoc.getLocWithOffset(strlen("auto_ptr") - 1);
+  diag(IdentifierLoc, "auto_ptr is deprecated, use unique_ptr instead")
+      << FixItHint::CreateReplacement(SourceRange(IdentifierLoc, EndLoc),
+                                      "unique_ptr");
+}
+
+} // namespace modernize
+} // namespace tidy
+} // namespace clang

test/clang-tidy/Inputs/modernize-replace-auto-ptr/memory.h

+#ifndef INPUTS_MEMORY_H
+#define INPUTS_MEMORY_H
+
+namespace std {
+
+inline namespace _1 {
+
+template <class Y> struct auto_ptr_ref {
+  Y *y_;
+};
+
+template <class X> class auto_ptr {
+public:
+  typedef X element_type;
+  explicit auto_ptr(X *p = 0) throw() {}
+  auto_ptr(auto_ptr &) throw() {}
+  template <class Y> auto_ptr(auto_ptr<Y> &) throw() {}
+  auto_ptr &operator=(auto_ptr &) throw() { return *this; }
+  template <class Y> auto_ptr &operator=(auto_ptr<Y> &) throw() {
+    return *this;
+  }
+  auto_ptr &operator=(auto_ptr_ref<X> r) throw() { return *this; }
+  ~auto_ptr() throw() {}
+  auto_ptr(auto_ptr_ref<X> r) throw() : x_(r.y_) {}
+  template <class Y> operator auto_ptr_ref<Y>() throw() {
+    auto_ptr_ref<Y> r;
+    r.y_ = x_;
+    return r;
+  }
+  template <class Y> operator auto_ptr<Y>() throw() { return auto_ptr<Y>(x_); }
+
+private:
+  X *x_;
+};
+
+template <> class auto_ptr<void> {
+public:
+  typedef void element_type;
+};
+
+} // namespace _1
+
+} // end namespace std
+
+#endif // INPUTS_MEMORY_H

test/clang-tidy/modernize-replace-auto-ptr.cpp

+// RUN: %python %S/check_clang_tidy.py %s modernize-replace-auto-ptr %t -- \
+// RUN:   -std=c++11 -I %S/Inputs/modernize-replace-auto-ptr
+
+// CHECK-FIXES: #include <utility>
+
+#include "memory.h"
+
+// Instrumentation for auto_ptr_ref test.
+struct Base {};
+struct Derived : Base {};
+std::auto_ptr<Derived> create_derived_ptr();
+// CHECK-MESSAGES: :[[@LINE-1]]:6: warning: auto_ptr is deprecated, use unique_ptr instead [modernize-replace-auto-ptr]
+// CHECK-FIXES: std::unique_ptr<Derived> create_derived_ptr();
+
+
+// Test function return values (declaration)
+std::auto_ptr<char> f_5();
+// CHECK-MESSAGES: :[[@LINE-1]]:6: warning: auto_ptr is deprecated
+// CHECK-FIXES: std::unique_ptr<char> f_5()
+
+
+// Test function parameters.
+void f_6(std::auto_ptr<int>);
+// CHECK-MESSAGES: :[[@LINE-1]]:15: warning: auto_ptr is deprecated
+// CHECK-FIXES: void f_6(std::unique_ptr<int>);
+void f_7(const std::auto_ptr<int> &);
+// CHECK-MESSAGES: :[[@LINE-1]]:21: warning: auto_ptr is deprecated
+// CHECK-FIXES: void f_7(const std::unique_ptr<int> &);
+
+
+// Test on record type fields.
+struct A {
+  std::auto_ptr<int> field;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> field;
+
+  typedef std::auto_ptr<int> int_ptr_type;
+  // CHECK-MESSAGES: :[[@LINE-1]]:16: warning: auto_ptr is deprecated
+  // CHECK-FIXES: typedef std::unique_ptr<int> int_ptr_type;
+};
+
+
+// FIXME: Test template WITH instantiation.
+template <typename T> struct B {
+  typedef typename std::auto_ptr<T> created_type;
+  // CHECK-MESSAGES: :[[@LINE-1]]:25: warning: auto_ptr is deprecated
+  // CHECK-FIXES: typedef typename std::unique_ptr<T> created_type;
+
+  created_type create() { return std::auto_ptr<T>(new T()); }
+  // CHECK-MESSAGES: :[[@LINE-1]]:39: warning: auto_ptr is deprecated
+  // CHECK-FIXES: created_type create() { return std::unique_ptr<T>(new T()); }
+};
+
+
+// Test 'using' in a namespace (declaration)
+namespace ns_1 {
+// Test multiple using declarations.
+  using std::auto_ptr;
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: auto_ptr is deprecated
+  // CHECK-FIXES: using std::unique_ptr;
+  using std::auto_ptr;
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: auto_ptr is deprecated
+  // CHECK-FIXES: using std::unique_ptr;
+}
+
+
+namespace ns_2 {
+template <typename T> struct auto_ptr {};
+}
+
+void f_1() {
+  std::auto_ptr<int> a;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> a;
+
+  // Check that spaces aren't modified unnecessarily.
+  std:: auto_ptr <int> b;
+  // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std:: unique_ptr <int> b;
+  std :: auto_ptr < char > c(new char());
+  // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std :: unique_ptr < char > c(new char());
+
+  // Test construction from a temporary.
+  std::auto_ptr<char> d = std::auto_ptr<char>();
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-MESSAGES: :[[@LINE-2]]:32: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<char> d = std::unique_ptr<char>();
+
+  typedef std::auto_ptr<int> int_ptr_t;
+  // CHECK-MESSAGES: :[[@LINE-1]]:16: warning: auto_ptr is deprecated
+  // CHECK-FIXES: typedef std::unique_ptr<int> int_ptr_t;
+  int_ptr_t e(new int());
+
+  // Test pointers.
+  std::auto_ptr<int> *f;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> *f;
+
+  // Test 'static' declarations.
+  static std::auto_ptr<int> g;
+  // CHECK-MESSAGES: :[[@LINE-1]]:15: warning: auto_ptr is deprecated
+  // CHECK-FIXES: static std::unique_ptr<int> g;
+
+  // Test with cv-qualifiers.
+  const std::auto_ptr<int> h;
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: auto_ptr is deprecated
+  // CHECK-FIXES: const std::unique_ptr<int> h;
+  volatile std::auto_ptr<int> i;
+  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: auto_ptr is deprecated
+  // CHECK-FIXES: volatile std::unique_ptr<int> i;
+  const volatile std::auto_ptr<int> j;
+  // CHECK-MESSAGES: :[[@LINE-1]]:23: warning: auto_ptr is deprecated
+  // CHECK-FIXES: const volatile std::unique_ptr<int> j;
+
+  // Test auto and initializer-list.
+  auto k = std::auto_ptr<int>{};
+  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: auto_ptr is deprecated
+  // CHECK-FIXES: auto k = std::unique_ptr<int>{};
+  std::auto_ptr<int> l{std::auto_ptr<int>()};
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-MESSAGES: :[[@LINE-2]]:29: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> l{std::unique_ptr<int>()};
+
+  // Test interlocked auto_ptr.
+  std::auto_ptr<std::auto_ptr<int> > m;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-MESSAGES: :[[@LINE-2]]:22: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<std::unique_ptr<int> > m;
+
+  // Test temporaries.
+  std::auto_ptr<char>();
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<char>();
+
+  // Test void-specialization.
+  std::auto_ptr<void> n;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<void> n;
+
+  // Test template WITH instantiation (instantiation).
+  B<double> o;
+  std::auto_ptr<double> p(o.create());
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<double> p(o.create());
+
+  // Test 'using' in a namespace ("definition").
+  ns_1::auto_ptr<int> q;
+  // CHECK-MESSAGES: :[[@LINE-1]]:9: warning: auto_ptr is deprecated
+  // CHECK-FIXES: ns_1::unique_ptr<int> q;
+
+  // Test construction with an 'auto_ptr_ref'.
+  std::auto_ptr<Base> r(create_derived_ptr());
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<Base> r(create_derived_ptr());
+}
+
+// Test without the nested name specifiers.
+void f_2() {
+  using namespace std;
+
+  auto_ptr<int> a;
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: auto_ptr is deprecated
+  // CHECK-FIXES: unique_ptr<int> a;
+}
+
+// Test using declaration.
+void f_3() {
+  using std::auto_ptr;
+  // CHECK-MESSAGES: :[[@LINE-1]]:14: warning: auto_ptr is deprecated
+  // CHECK-FIXES: using std::unique_ptr;
+
+  auto_ptr<int> a;
+  // CHECK-MESSAGES: :[[@LINE-1]]:3: warning: auto_ptr is deprecated
+  // CHECK-FIXES: unique_ptr<int> a;
+}
+
+// Test messing-up with macros.
+void f_4() {
+#define MACRO_1 <char>
+  std::auto_ptr MACRO_1 p(new char());
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr MACRO_1 p(new char());
+#define MACRO_2 auto_ptr
+  // CHECK-MESSAGES: :[[@LINE-1]]:17: warning: auto_ptr is deprecated
+  // CHECK-FIXES: #define MACRO_2 unique_ptr
+  std::MACRO_2<int> q;
+#define MACRO_3(Type) std::auto_ptr<Type>
+  // CHECK-MESSAGES: :[[@LINE-1]]:28: warning: auto_ptr is deprecated
+  // CHECK-FIXES: #define MACRO_3(Type) std::unique_ptr<Type>
+  MACRO_3(float)r(new float());
+#define MACRO_4 std::auto_ptr
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: auto_ptr is deprecated
+  // CHECK-FIXES: #define MACRO_4 std::unique_ptr
+  using MACRO_4;
+#undef MACRO_1
+#undef MACRO_2
+#undef MACRO_3
+#undef MACRO_4
+}
+
+// Test function return values (definition).
+std::auto_ptr<char> f_5()
+  // CHECK-MESSAGES: :[[@LINE-1]]:6: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<char> f_5()
+{
+  // Test constructor.
+  return std::auto_ptr<char>(new char());
+  // CHECK-MESSAGES: :[[@LINE-1]]:15: warning: auto_ptr is deprecated
+  // CHECK-FIXES: return std::unique_ptr<char>(new char());
+}
+
+// Test that non-std auto_ptr aren't replaced.
+void f_8() {
+  ns_2::auto_ptr<char> a;
+  using namespace ns_2;
+  auto_ptr<int> b;
+}
+
+// Fail to modify when the template is never instantiated.
+//
+// This might not be an issue. If it's never used it doesn't really matter if
+// it's changed or not. If it's a header and one of the source use it, then it
+// will still be changed.
+template <typename X>
+void f() {
+  std::auto_ptr<X> p;
+}
+
+// FIXME: Alias template could be replaced if a matcher existed.
+namespace std {
+template <typename T> using aaaaaaaa = auto_ptr<T>;
+}
+
+// We want to avoid replacing 'aaaaaaaa' by unique_ptr here. It's better to
+// change the type alias directly.
+std::aaaaaaaa<int> d;
+
+
+void takes_ownership_fn(std::auto_ptr<int> x);
+// CHECK-MESSAGES: :[[@LINE-1]]:30: warning: auto_ptr is deprecated
+// CHECK-FIXES: void takes_ownership_fn(std::unique_ptr<int> x);
+
+std::auto_ptr<int> get_by_value();
+// CHECK-MESSAGES: :[[@LINE-1]]:6: warning: auto_ptr is deprecated
+// CHECK-FIXES: std::unique_ptr<int> get_by_value();
+
+class Wrapper {
+ public:
+  std::auto_ptr<int> &get_wrapped();
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+
+ private:
+  std::auto_ptr<int> wrapped;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+};
+
+void f() {
+  std::auto_ptr<int> a, b, c;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> a, b, c;
+  Wrapper wrapper_a, wrapper_b;
+
+  a = b;
+  // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: use std::move to transfer ownership
+  // CHECK-FIXES: a = std::move(b);
+
+  wrapper_a.get_wrapped() = wrapper_b.get_wrapped();
+  // CHECK-MESSAGES: :[[@LINE-1]]:29: warning: use std::move to transfer ownership
+  // CHECK-FIXES: wrapper_a.get_wrapped() = std::move(wrapper_b.get_wrapped());
+
+  // Test that 'std::move()' is inserted when call to the
+  // copy-constructor are made.
+  takes_ownership_fn(c);
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: use std::move to transfer ownership
+  // CHECK-FIXES: takes_ownership_fn(std::move(c));
+  takes_ownership_fn(wrapper_a.get_wrapped());
+  // CHECK-MESSAGES: :[[@LINE-1]]:22: warning: use std::move to transfer ownership
+  // CHECK-FIXES: takes_ownership_fn(std::move(wrapper_a.get_wrapped()));
+
+  std::auto_ptr<int> d[] = { std::auto_ptr<int>(new int(1)),
+                             std::auto_ptr<int>(new int(2)) };
+  // CHECK-MESSAGES: :[[@LINE-2]]:8: warning: auto_ptr is deprecated
+  // CHECK-MESSAGES: :[[@LINE-3]]:35: warning: auto_ptr is deprecated
+  // CHECK-MESSAGES: :[[@LINE-3]]:35: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> d[] = { std::unique_ptr<int>(new int(1)),
+  // CHECK-FIXES-NEXT:                         std::unique_ptr<int>(new int(2)) };
+  std::auto_ptr<int> e = d[0];
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-MESSAGES: :[[@LINE-2]]:26: warning: use std::move to transfer ownership
+  // CHECK: std::unique_ptr<int> e = std::move(d[0]);
+
+  // Test that std::move() is not used when assigning an rvalue
+  std::auto_ptr<int> f;
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> f;
+  f = std::auto_ptr<int>(new int(0));
+  // CHECK-MESSAGES: :[[@LINE-1]]:12: warning: auto_ptr is deprecated
+  // CHECK-NEXT: f = std::unique_ptr<int>(new int(0));
+
+  std::auto_ptr<int> g = get_by_value();
+  // CHECK-MESSAGES: :[[@LINE-1]]:8: warning: auto_ptr is deprecated
+  // CHECK-FIXES: std::unique_ptr<int> g = get_by_value();
+}