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gtest-param-util.h
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30 // Author: vladl@google.com (Vlad Losev)
31 
32 // Type and function utilities for implementing parameterized tests.
33 
34 #ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
35 #define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
36 
37 #include <iterator>
38 #include <utility>
39 #include <vector>
40 
41 // scripts/fuse_gtest.py depends on gtest's own header being #included
42 // *unconditionally*. Therefore these #includes cannot be moved
43 // inside #if GTEST_HAS_PARAM_TEST.
47 #include "gtest/gtest-printers.h"
48 
49 #if GTEST_HAS_PARAM_TEST
50 
51 namespace testing {
52 namespace internal {
53 
54 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
55 //
56 // Outputs a message explaining invalid registration of different
57 // fixture class for the same test case. This may happen when
58 // TEST_P macro is used to define two tests with the same name
59 // but in different namespaces.
60 GTEST_API_ void ReportInvalidTestCaseType(const char* test_case_name,
61  const char* file, int line);
62 
63 template <typename> class ParamGeneratorInterface;
64 template <typename> class ParamGenerator;
65 
66 // Interface for iterating over elements provided by an implementation
67 // of ParamGeneratorInterface<T>.
68 template <typename T>
69 class ParamIteratorInterface {
70  public:
71  virtual ~ParamIteratorInterface() {}
72  // A pointer to the base generator instance.
73  // Used only for the purposes of iterator comparison
74  // to make sure that two iterators belong to the same generator.
75  virtual const ParamGeneratorInterface<T>* BaseGenerator() const = 0;
76  // Advances iterator to point to the next element
77  // provided by the generator. The caller is responsible
78  // for not calling Advance() on an iterator equal to
79  // BaseGenerator()->End().
80  virtual void Advance() = 0;
81  // Clones the iterator object. Used for implementing copy semantics
82  // of ParamIterator<T>.
83  virtual ParamIteratorInterface* Clone() const = 0;
84  // Dereferences the current iterator and provides (read-only) access
85  // to the pointed value. It is the caller's responsibility not to call
86  // Current() on an iterator equal to BaseGenerator()->End().
87  // Used for implementing ParamGenerator<T>::operator*().
88  virtual const T* Current() const = 0;
89  // Determines whether the given iterator and other point to the same
90  // element in the sequence generated by the generator.
91  // Used for implementing ParamGenerator<T>::operator==().
92  virtual bool Equals(const ParamIteratorInterface& other) const = 0;
93 };
94 
95 // Class iterating over elements provided by an implementation of
96 // ParamGeneratorInterface<T>. It wraps ParamIteratorInterface<T>
97 // and implements the const forward iterator concept.
98 template <typename T>
99 class ParamIterator {
100  public:
101  typedef T value_type;
102  typedef const T& reference;
103  typedef ptrdiff_t difference_type;
104 
105  // ParamIterator assumes ownership of the impl_ pointer.
106  ParamIterator(const ParamIterator& other) : impl_(other.impl_->Clone()) {}
107  ParamIterator& operator=(const ParamIterator& other) {
108  if (this != &other)
109  impl_.reset(other.impl_->Clone());
110  return *this;
111  }
112 
113  const T& operator*() const { return *impl_->Current(); }
114  const T* operator->() const { return impl_->Current(); }
115  // Prefix version of operator++.
116  ParamIterator& operator++() {
117  impl_->Advance();
118  return *this;
119  }
120  // Postfix version of operator++.
121  ParamIterator operator++(int /*unused*/) {
122  ParamIteratorInterface<T>* clone = impl_->Clone();
123  impl_->Advance();
124  return ParamIterator(clone);
125  }
126  bool operator==(const ParamIterator& other) const {
127  return impl_.get() == other.impl_.get() || impl_->Equals(*other.impl_);
128  }
129  bool operator!=(const ParamIterator& other) const {
130  return !(*this == other);
131  }
132 
133  private:
134  friend class ParamGenerator<T>;
135  explicit ParamIterator(ParamIteratorInterface<T>* impl) : impl_(impl) {}
136  scoped_ptr<ParamIteratorInterface<T> > impl_;
137 };
138 
139 // ParamGeneratorInterface<T> is the binary interface to access generators
140 // defined in other translation units.
141 template <typename T>
142 class ParamGeneratorInterface {
143  public:
144  typedef T ParamType;
145 
146  virtual ~ParamGeneratorInterface() {}
147 
148  // Generator interface definition
149  virtual ParamIteratorInterface<T>* Begin() const = 0;
150  virtual ParamIteratorInterface<T>* End() const = 0;
151 };
152 
153 // Wraps ParamGeneratorInterface<T> and provides general generator syntax
154 // compatible with the STL Container concept.
155 // This class implements copy initialization semantics and the contained
156 // ParamGeneratorInterface<T> instance is shared among all copies
157 // of the original object. This is possible because that instance is immutable.
158 template<typename T>
159 class ParamGenerator {
160  public:
161  typedef ParamIterator<T> iterator;
162 
163  explicit ParamGenerator(ParamGeneratorInterface<T>* impl) : impl_(impl) {}
164  ParamGenerator(const ParamGenerator& other) : impl_(other.impl_) {}
165 
166  ParamGenerator& operator=(const ParamGenerator& other) {
167  impl_ = other.impl_;
168  return *this;
169  }
170 
171  iterator begin() const { return iterator(impl_->Begin()); }
172  iterator end() const { return iterator(impl_->End()); }
173 
174  private:
175  linked_ptr<const ParamGeneratorInterface<T> > impl_;
176 };
177 
178 // Generates values from a range of two comparable values. Can be used to
179 // generate sequences of user-defined types that implement operator+() and
180 // operator<().
181 // This class is used in the Range() function.
182 template <typename T, typename IncrementT>
183 class RangeGenerator : public ParamGeneratorInterface<T> {
184  public:
185  RangeGenerator(T begin, T end, IncrementT step)
186  : begin_(begin), end_(end),
187  step_(step), end_index_(CalculateEndIndex(begin, end, step)) {}
188  virtual ~RangeGenerator() {}
189 
190  virtual ParamIteratorInterface<T>* Begin() const {
191  return new Iterator(this, begin_, 0, step_);
192  }
193  virtual ParamIteratorInterface<T>* End() const {
194  return new Iterator(this, end_, end_index_, step_);
195  }
196 
197  private:
198  class Iterator : public ParamIteratorInterface<T> {
199  public:
200  Iterator(const ParamGeneratorInterface<T>* base, T value, int index,
201  IncrementT step)
202  : base_(base), value_(value), index_(index), step_(step) {}
203  virtual ~Iterator() {}
204 
205  virtual const ParamGeneratorInterface<T>* BaseGenerator() const {
206  return base_;
207  }
208  virtual void Advance() {
209  value_ = value_ + step_;
210  index_++;
211  }
212  virtual ParamIteratorInterface<T>* Clone() const {
213  return new Iterator(*this);
214  }
215  virtual const T* Current() const { return &value_; }
216  virtual bool Equals(const ParamIteratorInterface<T>& other) const {
217  // Having the same base generator guarantees that the other
218  // iterator is of the same type and we can downcast.
219  GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
220  << "The program attempted to compare iterators "
221  << "from different generators." << std::endl;
222  const int other_index =
223  CheckedDowncastToActualType<const Iterator>(&other)->index_;
224  return index_ == other_index;
225  }
226 
227  private:
228  Iterator(const Iterator& other)
229  : ParamIteratorInterface<T>(),
230  base_(other.base_), value_(other.value_), index_(other.index_),
231  step_(other.step_) {}
232 
233  // No implementation - assignment is unsupported.
234  void operator=(const Iterator& other);
235 
236  const ParamGeneratorInterface<T>* const base_;
237  T value_;
238  int index_;
239  const IncrementT step_;
240  }; // class RangeGenerator::Iterator
241 
242  static int CalculateEndIndex(const T& begin,
243  const T& end,
244  const IncrementT& step) {
245  int end_index = 0;
246  for (T i = begin; i < end; i = i + step)
247  end_index++;
248  return end_index;
249  }
250 
251  // No implementation - assignment is unsupported.
252  void operator=(const RangeGenerator& other);
253 
254  const T begin_;
255  const T end_;
256  const IncrementT step_;
257  // The index for the end() iterator. All the elements in the generated
258  // sequence are indexed (0-based) to aid iterator comparison.
259  const int end_index_;
260 }; // class RangeGenerator
261 
262 
263 // Generates values from a pair of STL-style iterators. Used in the
264 // ValuesIn() function. The elements are copied from the source range
265 // since the source can be located on the stack, and the generator
266 // is likely to persist beyond that stack frame.
267 template <typename T>
268 class ValuesInIteratorRangeGenerator : public ParamGeneratorInterface<T> {
269  public:
270  template <typename ForwardIterator>
271  ValuesInIteratorRangeGenerator(ForwardIterator begin, ForwardIterator end)
272  : container_(begin, end) {}
273  virtual ~ValuesInIteratorRangeGenerator() {}
274 
275  virtual ParamIteratorInterface<T>* Begin() const {
276  return new Iterator(this, container_.begin());
277  }
278  virtual ParamIteratorInterface<T>* End() const {
279  return new Iterator(this, container_.end());
280  }
281 
282  private:
283  typedef typename ::std::vector<T> ContainerType;
284 
285  class Iterator : public ParamIteratorInterface<T> {
286  public:
287  Iterator(const ParamGeneratorInterface<T>* base,
288  typename ContainerType::const_iterator iterator)
289  : base_(base), iterator_(iterator) {}
290  virtual ~Iterator() {}
291 
292  virtual const ParamGeneratorInterface<T>* BaseGenerator() const {
293  return base_;
294  }
295  virtual void Advance() {
296  ++iterator_;
297  value_.reset();
298  }
299  virtual ParamIteratorInterface<T>* Clone() const {
300  return new Iterator(*this);
301  }
302  // We need to use cached value referenced by iterator_ because *iterator_
303  // can return a temporary object (and of type other then T), so just
304  // having "return &*iterator_;" doesn't work.
305  // value_ is updated here and not in Advance() because Advance()
306  // can advance iterator_ beyond the end of the range, and we cannot
307  // detect that fact. The client code, on the other hand, is
308  // responsible for not calling Current() on an out-of-range iterator.
309  virtual const T* Current() const {
310  if (value_.get() == NULL)
311  value_.reset(new T(*iterator_));
312  return value_.get();
313  }
314  virtual bool Equals(const ParamIteratorInterface<T>& other) const {
315  // Having the same base generator guarantees that the other
316  // iterator is of the same type and we can downcast.
317  GTEST_CHECK_(BaseGenerator() == other.BaseGenerator())
318  << "The program attempted to compare iterators "
319  << "from different generators." << std::endl;
320  return iterator_ ==
321  CheckedDowncastToActualType<const Iterator>(&other)->iterator_;
322  }
323 
324  private:
325  Iterator(const Iterator& other)
326  // The explicit constructor call suppresses a false warning
327  // emitted by gcc when supplied with the -Wextra option.
328  : ParamIteratorInterface<T>(),
329  base_(other.base_),
330  iterator_(other.iterator_) {}
331 
332  const ParamGeneratorInterface<T>* const base_;
333  typename ContainerType::const_iterator iterator_;
334  // A cached value of *iterator_. We keep it here to allow access by
335  // pointer in the wrapping iterator's operator->().
336  // value_ needs to be mutable to be accessed in Current().
337  // Use of scoped_ptr helps manage cached value's lifetime,
338  // which is bound by the lifespan of the iterator itself.
339  mutable scoped_ptr<const T> value_;
340  }; // class ValuesInIteratorRangeGenerator::Iterator
341 
342  // No implementation - assignment is unsupported.
343  void operator=(const ValuesInIteratorRangeGenerator& other);
344 
345  const ContainerType container_;
346 }; // class ValuesInIteratorRangeGenerator
347 
348 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
349 //
350 // Stores a parameter value and later creates tests parameterized with that
351 // value.
352 template <class TestClass>
353 class ParameterizedTestFactory : public TestFactoryBase {
354  public:
355  typedef typename TestClass::ParamType ParamType;
356  explicit ParameterizedTestFactory(ParamType parameter) :
357  parameter_(parameter) {}
358  virtual Test* CreateTest() {
359  TestClass::SetParam(&parameter_);
360  return new TestClass();
361  }
362 
363  private:
364  const ParamType parameter_;
365 
366  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestFactory);
367 };
368 
369 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
370 //
371 // TestMetaFactoryBase is a base class for meta-factories that create
372 // test factories for passing into MakeAndRegisterTestInfo function.
373 template <class ParamType>
374 class TestMetaFactoryBase {
375  public:
376  virtual ~TestMetaFactoryBase() {}
377 
378  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) = 0;
379 };
380 
381 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
382 //
383 // TestMetaFactory creates test factories for passing into
384 // MakeAndRegisterTestInfo function. Since MakeAndRegisterTestInfo receives
385 // ownership of test factory pointer, same factory object cannot be passed
386 // into that method twice. But ParameterizedTestCaseInfo is going to call
387 // it for each Test/Parameter value combination. Thus it needs meta factory
388 // creator class.
389 template <class TestCase>
390 class TestMetaFactory
391  : public TestMetaFactoryBase<typename TestCase::ParamType> {
392  public:
393  typedef typename TestCase::ParamType ParamType;
394 
395  TestMetaFactory() {}
396 
397  virtual TestFactoryBase* CreateTestFactory(ParamType parameter) {
398  return new ParameterizedTestFactory<TestCase>(parameter);
399  }
400 
401  private:
402  GTEST_DISALLOW_COPY_AND_ASSIGN_(TestMetaFactory);
403 };
404 
405 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
406 //
407 // ParameterizedTestCaseInfoBase is a generic interface
408 // to ParameterizedTestCaseInfo classes. ParameterizedTestCaseInfoBase
409 // accumulates test information provided by TEST_P macro invocations
410 // and generators provided by INSTANTIATE_TEST_CASE_P macro invocations
411 // and uses that information to register all resulting test instances
412 // in RegisterTests method. The ParameterizeTestCaseRegistry class holds
413 // a collection of pointers to the ParameterizedTestCaseInfo objects
414 // and calls RegisterTests() on each of them when asked.
415 class ParameterizedTestCaseInfoBase {
416  public:
417  virtual ~ParameterizedTestCaseInfoBase() {}
418 
419  // Base part of test case name for display purposes.
420  virtual const string& GetTestCaseName() const = 0;
421  // Test case id to verify identity.
422  virtual TypeId GetTestCaseTypeId() const = 0;
423  // UnitTest class invokes this method to register tests in this
424  // test case right before running them in RUN_ALL_TESTS macro.
425  // This method should not be called more then once on any single
426  // instance of a ParameterizedTestCaseInfoBase derived class.
427  virtual void RegisterTests() = 0;
428 
429  protected:
430  ParameterizedTestCaseInfoBase() {}
431 
432  private:
433  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestCaseInfoBase);
434 };
435 
436 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
437 //
438 // ParameterizedTestCaseInfo accumulates tests obtained from TEST_P
439 // macro invocations for a particular test case and generators
440 // obtained from INSTANTIATE_TEST_CASE_P macro invocations for that
441 // test case. It registers tests with all values generated by all
442 // generators when asked.
443 template <class TestCase>
444 class ParameterizedTestCaseInfo : public ParameterizedTestCaseInfoBase {
445  public:
446  // ParamType and GeneratorCreationFunc are private types but are required
447  // for declarations of public methods AddTestPattern() and
448  // AddTestCaseInstantiation().
449  typedef typename TestCase::ParamType ParamType;
450  // A function that returns an instance of appropriate generator type.
451  typedef ParamGenerator<ParamType>(GeneratorCreationFunc)();
452 
453  explicit ParameterizedTestCaseInfo(const char* name)
454  : test_case_name_(name) {}
455 
456  // Test case base name for display purposes.
457  virtual const string& GetTestCaseName() const { return test_case_name_; }
458  // Test case id to verify identity.
459  virtual TypeId GetTestCaseTypeId() const { return GetTypeId<TestCase>(); }
460  // TEST_P macro uses AddTestPattern() to record information
461  // about a single test in a LocalTestInfo structure.
462  // test_case_name is the base name of the test case (without invocation
463  // prefix). test_base_name is the name of an individual test without
464  // parameter index. For the test SequenceA/FooTest.DoBar/1 FooTest is
465  // test case base name and DoBar is test base name.
466  void AddTestPattern(const char* test_case_name,
467  const char* test_base_name,
468  TestMetaFactoryBase<ParamType>* meta_factory) {
469  tests_.push_back(linked_ptr<TestInfo>(new TestInfo(test_case_name,
470  test_base_name,
471  meta_factory)));
472  }
473  // INSTANTIATE_TEST_CASE_P macro uses AddGenerator() to record information
474  // about a generator.
475  int AddTestCaseInstantiation(const string& instantiation_name,
476  GeneratorCreationFunc* func,
477  const char* /* file */,
478  int /* line */) {
479  instantiations_.push_back(::std::make_pair(instantiation_name, func));
480  return 0; // Return value used only to run this method in namespace scope.
481  }
482  // UnitTest class invokes this method to register tests in this test case
483  // test cases right before running tests in RUN_ALL_TESTS macro.
484  // This method should not be called more then once on any single
485  // instance of a ParameterizedTestCaseInfoBase derived class.
486  // UnitTest has a guard to prevent from calling this method more then once.
487  virtual void RegisterTests() {
488  for (typename TestInfoContainer::iterator test_it = tests_.begin();
489  test_it != tests_.end(); ++test_it) {
490  linked_ptr<TestInfo> test_info = *test_it;
491  for (typename InstantiationContainer::iterator gen_it =
492  instantiations_.begin(); gen_it != instantiations_.end();
493  ++gen_it) {
494  const string& instantiation_name = gen_it->first;
495  ParamGenerator<ParamType> generator((*gen_it->second)());
496 
497  Message test_case_name_stream;
498  if ( !instantiation_name.empty() )
499  test_case_name_stream << instantiation_name << "/";
500  test_case_name_stream << test_info->test_case_base_name;
501 
502  int i = 0;
503  for (typename ParamGenerator<ParamType>::iterator param_it =
504  generator.begin();
505  param_it != generator.end(); ++param_it, ++i) {
506  Message test_name_stream;
507  test_name_stream << test_info->test_base_name << "/" << i;
509  test_case_name_stream.GetString().c_str(),
510  test_name_stream.GetString().c_str(),
511  NULL, // No type parameter.
512  PrintToString(*param_it).c_str(),
513  GetTestCaseTypeId(),
514  TestCase::SetUpTestCase,
515  TestCase::TearDownTestCase,
516  test_info->test_meta_factory->CreateTestFactory(*param_it));
517  } // for param_it
518  } // for gen_it
519  } // for test_it
520  } // RegisterTests
521 
522  private:
523  // LocalTestInfo structure keeps information about a single test registered
524  // with TEST_P macro.
525  struct TestInfo {
526  TestInfo(const char* a_test_case_base_name,
527  const char* a_test_base_name,
528  TestMetaFactoryBase<ParamType>* a_test_meta_factory) :
529  test_case_base_name(a_test_case_base_name),
530  test_base_name(a_test_base_name),
531  test_meta_factory(a_test_meta_factory) {}
532 
533  const string test_case_base_name;
534  const string test_base_name;
535  const scoped_ptr<TestMetaFactoryBase<ParamType> > test_meta_factory;
536  };
537  typedef ::std::vector<linked_ptr<TestInfo> > TestInfoContainer;
538  // Keeps pairs of <Instantiation name, Sequence generator creation function>
539  // received from INSTANTIATE_TEST_CASE_P macros.
540  typedef ::std::vector<std::pair<string, GeneratorCreationFunc*> >
541  InstantiationContainer;
542 
543  const string test_case_name_;
544  TestInfoContainer tests_;
545  InstantiationContainer instantiations_;
546 
547  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestCaseInfo);
548 }; // class ParameterizedTestCaseInfo
549 
550 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
551 //
552 // ParameterizedTestCaseRegistry contains a map of ParameterizedTestCaseInfoBase
553 // classes accessed by test case names. TEST_P and INSTANTIATE_TEST_CASE_P
554 // macros use it to locate their corresponding ParameterizedTestCaseInfo
555 // descriptors.
556 class ParameterizedTestCaseRegistry {
557  public:
558  ParameterizedTestCaseRegistry() {}
559  ~ParameterizedTestCaseRegistry() {
560  for (TestCaseInfoContainer::iterator it = test_case_infos_.begin();
561  it != test_case_infos_.end(); ++it) {
562  delete *it;
563  }
564  }
565 
566  // Looks up or creates and returns a structure containing information about
567  // tests and instantiations of a particular test case.
568  template <class TestCase>
569  ParameterizedTestCaseInfo<TestCase>* GetTestCasePatternHolder(
570  const char* test_case_name,
571  const char* file,
572  int line) {
573  ParameterizedTestCaseInfo<TestCase>* typed_test_info = NULL;
574  for (TestCaseInfoContainer::iterator it = test_case_infos_.begin();
575  it != test_case_infos_.end(); ++it) {
576  if ((*it)->GetTestCaseName() == test_case_name) {
577  if ((*it)->GetTestCaseTypeId() != GetTypeId<TestCase>()) {
578  // Complain about incorrect usage of Google Test facilities
579  // and terminate the program since we cannot guaranty correct
580  // test case setup and tear-down in this case.
581  ReportInvalidTestCaseType(test_case_name, file, line);
582  posix::Abort();
583  } else {
584  // At this point we are sure that the object we found is of the same
585  // type we are looking for, so we downcast it to that type
586  // without further checks.
587  typed_test_info = CheckedDowncastToActualType<
588  ParameterizedTestCaseInfo<TestCase> >(*it);
589  }
590  break;
591  }
592  }
593  if (typed_test_info == NULL) {
594  typed_test_info = new ParameterizedTestCaseInfo<TestCase>(test_case_name);
595  test_case_infos_.push_back(typed_test_info);
596  }
597  return typed_test_info;
598  }
599  void RegisterTests() {
600  for (TestCaseInfoContainer::iterator it = test_case_infos_.begin();
601  it != test_case_infos_.end(); ++it) {
602  (*it)->RegisterTests();
603  }
604  }
605 
606  private:
607  typedef ::std::vector<ParameterizedTestCaseInfoBase*> TestCaseInfoContainer;
608 
609  TestCaseInfoContainer test_case_infos_;
610 
611  GTEST_DISALLOW_COPY_AND_ASSIGN_(ParameterizedTestCaseRegistry);
612 };
613 
614 } // namespace internal
615 } // namespace testing
616 
617 #endif // GTEST_HAS_PARAM_TEST
618 
619 #endif // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PARAM_UTIL_H_
Definition: gmock-actions.h:49
::std::string PrintToString(const T &value)
Definition: gtest-printers.h:788
Definition: InputPrereqs.h:71
bool operator==(T *ptr, const linked_ptr< T > &x)
Definition: gtest-linked_ptr.h:213
#define GTEST_API_
Definition: gtest-port.h:662
GTEST_API_ TestInfo * MakeAndRegisterTestInfo(const char *test_case_name, const char *name, const char *type_param, const char *value_param, TypeId fixture_class_id, SetUpTestCaseFunc set_up_tc, TearDownTestCaseFunc tear_down_tc, TestFactoryBase *factory)
Definition: gtest.cc:2229
const void * TypeId
Definition: gtest-internal.h:474
#define GTEST_CHECK_(condition)
Definition: gtest-port.h:944
Definition: InputPrereqs.h:183
Definition: InputPrereqs.h:78
void Abort()
Definition: gtest-port.h:1664
#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type)
Definition: gtest-port.h:620
bool operator!=(T *ptr, const linked_ptr< T > &x)
Definition: gtest-linked_ptr.h:218
Derived * CheckedDowncastToActualType(Base *base)
Definition: gtest-port.h:1029