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1 | // Copyright 2007, Google Inc. |
2 | // All rights reserved. | |
3 | // | |
4 | // Redistribution and use in source and binary forms, with or without | |
5 | // modification, are permitted provided that the following conditions are | |
6 | // met: | |
7 | // | |
8 | // * Redistributions of source code must retain the above copyright | |
9 | // notice, this list of conditions and the following disclaimer. | |
10 | // * Redistributions in binary form must reproduce the above | |
11 | // copyright notice, this list of conditions and the following disclaimer | |
12 | // in the documentation and/or other materials provided with the | |
13 | // distribution. | |
14 | // * Neither the name of Google Inc. nor the names of its | |
15 | // contributors may be used to endorse or promote products derived from | |
16 | // this software without specific prior written permission. | |
17 | // | |
18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
9f95a23c | 29 | |
7c673cae FG |
30 | |
31 | // Google Mock - a framework for writing C++ mock classes. | |
32 | // | |
33 | // This file defines some utilities useful for implementing Google | |
34 | // Mock. They are subject to change without notice, so please DO NOT | |
35 | // USE THEM IN USER CODE. | |
36 | ||
9f95a23c TL |
37 | // GOOGLETEST_CM0002 DO NOT DELETE |
38 | ||
7c673cae FG |
39 | #ifndef GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_ |
40 | #define GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_ | |
41 | ||
42 | #include <stdio.h> | |
43 | #include <ostream> // NOLINT | |
44 | #include <string> | |
9f95a23c | 45 | #include <type_traits> |
7c673cae FG |
46 | #include "gmock/internal/gmock-port.h" |
47 | #include "gtest/gtest.h" | |
48 | ||
49 | namespace testing { | |
9f95a23c TL |
50 | |
51 | template <typename> | |
52 | class Matcher; | |
53 | ||
7c673cae FG |
54 | namespace internal { |
55 | ||
9f95a23c TL |
56 | // Silence MSVC C4100 (unreferenced formal parameter) and |
57 | // C4805('==': unsafe mix of type 'const int' and type 'const bool') | |
58 | #ifdef _MSC_VER | |
59 | # pragma warning(push) | |
60 | # pragma warning(disable:4100) | |
61 | # pragma warning(disable:4805) | |
62 | #endif | |
63 | ||
64 | // Joins a vector of strings as if they are fields of a tuple; returns | |
65 | // the joined string. | |
66 | GTEST_API_ std::string JoinAsTuple(const Strings& fields); | |
67 | ||
7c673cae FG |
68 | // Converts an identifier name to a space-separated list of lower-case |
69 | // words. Each maximum substring of the form [A-Za-z][a-z]*|\d+ is | |
70 | // treated as one word. For example, both "FooBar123" and | |
71 | // "foo_bar_123" are converted to "foo bar 123". | |
9f95a23c | 72 | GTEST_API_ std::string ConvertIdentifierNameToWords(const char* id_name); |
7c673cae FG |
73 | |
74 | // PointeeOf<Pointer>::type is the type of a value pointed to by a | |
75 | // Pointer, which can be either a smart pointer or a raw pointer. The | |
76 | // following default implementation is for the case where Pointer is a | |
77 | // smart pointer. | |
78 | template <typename Pointer> | |
79 | struct PointeeOf { | |
80 | // Smart pointer classes define type element_type as the type of | |
81 | // their pointees. | |
82 | typedef typename Pointer::element_type type; | |
83 | }; | |
84 | // This specialization is for the raw pointer case. | |
85 | template <typename T> | |
86 | struct PointeeOf<T*> { typedef T type; }; // NOLINT | |
87 | ||
88 | // GetRawPointer(p) returns the raw pointer underlying p when p is a | |
89 | // smart pointer, or returns p itself when p is already a raw pointer. | |
90 | // The following default implementation is for the smart pointer case. | |
91 | template <typename Pointer> | |
92 | inline const typename Pointer::element_type* GetRawPointer(const Pointer& p) { | |
93 | return p.get(); | |
94 | } | |
95 | // This overloaded version is for the raw pointer case. | |
96 | template <typename Element> | |
97 | inline Element* GetRawPointer(Element* p) { return p; } | |
98 | ||
7c673cae FG |
99 | // MSVC treats wchar_t as a native type usually, but treats it as the |
100 | // same as unsigned short when the compiler option /Zc:wchar_t- is | |
101 | // specified. It defines _NATIVE_WCHAR_T_DEFINED symbol when wchar_t | |
102 | // is a native type. | |
9f95a23c | 103 | #if defined(_MSC_VER) && !defined(_NATIVE_WCHAR_T_DEFINED) |
7c673cae FG |
104 | // wchar_t is a typedef. |
105 | #else | |
106 | # define GMOCK_WCHAR_T_IS_NATIVE_ 1 | |
107 | #endif | |
108 | ||
7c673cae FG |
109 | // In what follows, we use the term "kind" to indicate whether a type |
110 | // is bool, an integer type (excluding bool), a floating-point type, | |
111 | // or none of them. This categorization is useful for determining | |
112 | // when a matcher argument type can be safely converted to another | |
113 | // type in the implementation of SafeMatcherCast. | |
114 | enum TypeKind { | |
115 | kBool, kInteger, kFloatingPoint, kOther | |
116 | }; | |
117 | ||
118 | // KindOf<T>::value is the kind of type T. | |
119 | template <typename T> struct KindOf { | |
120 | enum { value = kOther }; // The default kind. | |
121 | }; | |
122 | ||
123 | // This macro declares that the kind of 'type' is 'kind'. | |
124 | #define GMOCK_DECLARE_KIND_(type, kind) \ | |
125 | template <> struct KindOf<type> { enum { value = kind }; } | |
126 | ||
127 | GMOCK_DECLARE_KIND_(bool, kBool); | |
128 | ||
129 | // All standard integer types. | |
130 | GMOCK_DECLARE_KIND_(char, kInteger); | |
131 | GMOCK_DECLARE_KIND_(signed char, kInteger); | |
132 | GMOCK_DECLARE_KIND_(unsigned char, kInteger); | |
133 | GMOCK_DECLARE_KIND_(short, kInteger); // NOLINT | |
134 | GMOCK_DECLARE_KIND_(unsigned short, kInteger); // NOLINT | |
135 | GMOCK_DECLARE_KIND_(int, kInteger); | |
136 | GMOCK_DECLARE_KIND_(unsigned int, kInteger); | |
137 | GMOCK_DECLARE_KIND_(long, kInteger); // NOLINT | |
138 | GMOCK_DECLARE_KIND_(unsigned long, kInteger); // NOLINT | |
9f95a23c TL |
139 | GMOCK_DECLARE_KIND_(long long, kInteger); // NOLINT |
140 | GMOCK_DECLARE_KIND_(unsigned long long, kInteger); // NOLINT | |
7c673cae FG |
141 | |
142 | #if GMOCK_WCHAR_T_IS_NATIVE_ | |
143 | GMOCK_DECLARE_KIND_(wchar_t, kInteger); | |
144 | #endif | |
145 | ||
7c673cae FG |
146 | // All standard floating-point types. |
147 | GMOCK_DECLARE_KIND_(float, kFloatingPoint); | |
148 | GMOCK_DECLARE_KIND_(double, kFloatingPoint); | |
149 | GMOCK_DECLARE_KIND_(long double, kFloatingPoint); | |
150 | ||
151 | #undef GMOCK_DECLARE_KIND_ | |
152 | ||
153 | // Evaluates to the kind of 'type'. | |
154 | #define GMOCK_KIND_OF_(type) \ | |
155 | static_cast< ::testing::internal::TypeKind>( \ | |
156 | ::testing::internal::KindOf<type>::value) | |
157 | ||
7c673cae | 158 | // LosslessArithmeticConvertibleImpl<kFromKind, From, kToKind, To>::value |
9f95a23c | 159 | // is true if and only if arithmetic type From can be losslessly converted to |
7c673cae FG |
160 | // arithmetic type To. |
161 | // | |
162 | // It's the user's responsibility to ensure that both From and To are | |
163 | // raw (i.e. has no CV modifier, is not a pointer, and is not a | |
164 | // reference) built-in arithmetic types, kFromKind is the kind of | |
165 | // From, and kToKind is the kind of To; the value is | |
166 | // implementation-defined when the above pre-condition is violated. | |
167 | template <TypeKind kFromKind, typename From, TypeKind kToKind, typename To> | |
9f95a23c TL |
168 | using LosslessArithmeticConvertibleImpl = std::integral_constant< |
169 | bool, | |
170 | // clang-format off | |
171 | // Converting from bool is always lossless | |
172 | (kFromKind == kBool) ? true | |
173 | // Converting between any other type kinds will be lossy if the type | |
174 | // kinds are not the same. | |
175 | : (kFromKind != kToKind) ? false | |
176 | : (kFromKind == kInteger && | |
177 | // Converting between integers of different widths is allowed so long | |
178 | // as the conversion does not go from signed to unsigned. | |
179 | (((sizeof(From) < sizeof(To)) && | |
180 | !(std::is_signed<From>::value && !std::is_signed<To>::value)) || | |
181 | // Converting between integers of the same width only requires the | |
182 | // two types to have the same signedness. | |
183 | ((sizeof(From) == sizeof(To)) && | |
184 | (std::is_signed<From>::value == std::is_signed<To>::value))) | |
185 | ) ? true | |
186 | // Floating point conversions are lossless if and only if `To` is at least | |
187 | // as wide as `From`. | |
188 | : (kFromKind == kFloatingPoint && (sizeof(From) <= sizeof(To))) ? true | |
189 | : false | |
190 | // clang-format on | |
191 | >; | |
192 | ||
193 | // LosslessArithmeticConvertible<From, To>::value is true if and only if | |
194 | // arithmetic type From can be losslessly converted to arithmetic type To. | |
7c673cae FG |
195 | // |
196 | // It's the user's responsibility to ensure that both From and To are | |
197 | // raw (i.e. has no CV modifier, is not a pointer, and is not a | |
198 | // reference) built-in arithmetic types; the value is | |
199 | // implementation-defined when the above pre-condition is violated. | |
200 | template <typename From, typename To> | |
9f95a23c TL |
201 | using LosslessArithmeticConvertible = |
202 | LosslessArithmeticConvertibleImpl<GMOCK_KIND_OF_(From), From, | |
203 | GMOCK_KIND_OF_(To), To>; | |
7c673cae FG |
204 | |
205 | // This interface knows how to report a Google Mock failure (either | |
206 | // non-fatal or fatal). | |
207 | class FailureReporterInterface { | |
208 | public: | |
209 | // The type of a failure (either non-fatal or fatal). | |
210 | enum FailureType { | |
211 | kNonfatal, kFatal | |
212 | }; | |
213 | ||
214 | virtual ~FailureReporterInterface() {} | |
215 | ||
216 | // Reports a failure that occurred at the given source file location. | |
217 | virtual void ReportFailure(FailureType type, const char* file, int line, | |
9f95a23c | 218 | const std::string& message) = 0; |
7c673cae FG |
219 | }; |
220 | ||
221 | // Returns the failure reporter used by Google Mock. | |
222 | GTEST_API_ FailureReporterInterface* GetFailureReporter(); | |
223 | ||
224 | // Asserts that condition is true; aborts the process with the given | |
225 | // message if condition is false. We cannot use LOG(FATAL) or CHECK() | |
226 | // as Google Mock might be used to mock the log sink itself. We | |
227 | // inline this function to prevent it from showing up in the stack | |
228 | // trace. | |
229 | inline void Assert(bool condition, const char* file, int line, | |
9f95a23c | 230 | const std::string& msg) { |
7c673cae FG |
231 | if (!condition) { |
232 | GetFailureReporter()->ReportFailure(FailureReporterInterface::kFatal, | |
233 | file, line, msg); | |
234 | } | |
235 | } | |
236 | inline void Assert(bool condition, const char* file, int line) { | |
237 | Assert(condition, file, line, "Assertion failed."); | |
238 | } | |
239 | ||
240 | // Verifies that condition is true; generates a non-fatal failure if | |
241 | // condition is false. | |
242 | inline void Expect(bool condition, const char* file, int line, | |
9f95a23c | 243 | const std::string& msg) { |
7c673cae FG |
244 | if (!condition) { |
245 | GetFailureReporter()->ReportFailure(FailureReporterInterface::kNonfatal, | |
246 | file, line, msg); | |
247 | } | |
248 | } | |
249 | inline void Expect(bool condition, const char* file, int line) { | |
250 | Expect(condition, file, line, "Expectation failed."); | |
251 | } | |
252 | ||
253 | // Severity level of a log. | |
254 | enum LogSeverity { | |
255 | kInfo = 0, | |
256 | kWarning = 1 | |
257 | }; | |
258 | ||
259 | // Valid values for the --gmock_verbose flag. | |
260 | ||
261 | // All logs (informational and warnings) are printed. | |
262 | const char kInfoVerbosity[] = "info"; | |
263 | // Only warnings are printed. | |
264 | const char kWarningVerbosity[] = "warning"; | |
265 | // No logs are printed. | |
266 | const char kErrorVerbosity[] = "error"; | |
267 | ||
9f95a23c TL |
268 | // Returns true if and only if a log with the given severity is visible |
269 | // according to the --gmock_verbose flag. | |
7c673cae FG |
270 | GTEST_API_ bool LogIsVisible(LogSeverity severity); |
271 | ||
9f95a23c | 272 | // Prints the given message to stdout if and only if 'severity' >= the level |
7c673cae FG |
273 | // specified by the --gmock_verbose flag. If stack_frames_to_skip >= |
274 | // 0, also prints the stack trace excluding the top | |
275 | // stack_frames_to_skip frames. In opt mode, any positive | |
276 | // stack_frames_to_skip is treated as 0, since we don't know which | |
277 | // function calls will be inlined by the compiler and need to be | |
278 | // conservative. | |
9f95a23c | 279 | GTEST_API_ void Log(LogSeverity severity, const std::string& message, |
7c673cae FG |
280 | int stack_frames_to_skip); |
281 | ||
9f95a23c TL |
282 | // A marker class that is used to resolve parameterless expectations to the |
283 | // correct overload. This must not be instantiable, to prevent client code from | |
284 | // accidentally resolving to the overload; for example: | |
285 | // | |
286 | // ON_CALL(mock, Method({}, nullptr))... | |
287 | // | |
288 | class WithoutMatchers { | |
289 | private: | |
290 | WithoutMatchers() {} | |
291 | friend GTEST_API_ WithoutMatchers GetWithoutMatchers(); | |
7c673cae FG |
292 | }; |
293 | ||
9f95a23c TL |
294 | // Internal use only: access the singleton instance of WithoutMatchers. |
295 | GTEST_API_ WithoutMatchers GetWithoutMatchers(); | |
296 | ||
7c673cae FG |
297 | // Disable MSVC warnings for infinite recursion, since in this case the |
298 | // the recursion is unreachable. | |
299 | #ifdef _MSC_VER | |
300 | # pragma warning(push) | |
301 | # pragma warning(disable:4717) | |
302 | #endif | |
303 | ||
304 | // Invalid<T>() is usable as an expression of type T, but will terminate | |
305 | // the program with an assertion failure if actually run. This is useful | |
306 | // when a value of type T is needed for compilation, but the statement | |
307 | // will not really be executed (or we don't care if the statement | |
308 | // crashes). | |
309 | template <typename T> | |
310 | inline T Invalid() { | |
311 | Assert(false, "", -1, "Internal error: attempt to return invalid value"); | |
312 | // This statement is unreachable, and would never terminate even if it | |
313 | // could be reached. It is provided only to placate compiler warnings | |
314 | // about missing return statements. | |
315 | return Invalid<T>(); | |
316 | } | |
317 | ||
318 | #ifdef _MSC_VER | |
319 | # pragma warning(pop) | |
320 | #endif | |
321 | ||
322 | // Given a raw type (i.e. having no top-level reference or const | |
323 | // modifier) RawContainer that's either an STL-style container or a | |
324 | // native array, class StlContainerView<RawContainer> has the | |
325 | // following members: | |
326 | // | |
327 | // - type is a type that provides an STL-style container view to | |
328 | // (i.e. implements the STL container concept for) RawContainer; | |
329 | // - const_reference is a type that provides a reference to a const | |
330 | // RawContainer; | |
331 | // - ConstReference(raw_container) returns a const reference to an STL-style | |
332 | // container view to raw_container, which is a RawContainer. | |
333 | // - Copy(raw_container) returns an STL-style container view of a | |
334 | // copy of raw_container, which is a RawContainer. | |
335 | // | |
336 | // This generic version is used when RawContainer itself is already an | |
337 | // STL-style container. | |
338 | template <class RawContainer> | |
339 | class StlContainerView { | |
340 | public: | |
341 | typedef RawContainer type; | |
342 | typedef const type& const_reference; | |
343 | ||
344 | static const_reference ConstReference(const RawContainer& container) { | |
9f95a23c TL |
345 | static_assert(!std::is_const<RawContainer>::value, |
346 | "RawContainer type must not be const"); | |
7c673cae FG |
347 | return container; |
348 | } | |
349 | static type Copy(const RawContainer& container) { return container; } | |
350 | }; | |
351 | ||
352 | // This specialization is used when RawContainer is a native array type. | |
353 | template <typename Element, size_t N> | |
354 | class StlContainerView<Element[N]> { | |
355 | public: | |
9f95a23c | 356 | typedef typename std::remove_const<Element>::type RawElement; |
7c673cae FG |
357 | typedef internal::NativeArray<RawElement> type; |
358 | // NativeArray<T> can represent a native array either by value or by | |
359 | // reference (selected by a constructor argument), so 'const type' | |
360 | // can be used to reference a const native array. We cannot | |
361 | // 'typedef const type& const_reference' here, as that would mean | |
362 | // ConstReference() has to return a reference to a local variable. | |
363 | typedef const type const_reference; | |
364 | ||
365 | static const_reference ConstReference(const Element (&array)[N]) { | |
9f95a23c TL |
366 | static_assert(std::is_same<Element, RawElement>::value, |
367 | "Element type must not be const"); | |
7c673cae | 368 | return type(array, N, RelationToSourceReference()); |
7c673cae FG |
369 | } |
370 | static type Copy(const Element (&array)[N]) { | |
7c673cae | 371 | return type(array, N, RelationToSourceCopy()); |
7c673cae FG |
372 | } |
373 | }; | |
374 | ||
375 | // This specialization is used when RawContainer is a native array | |
376 | // represented as a (pointer, size) tuple. | |
377 | template <typename ElementPointer, typename Size> | |
9f95a23c | 378 | class StlContainerView< ::std::tuple<ElementPointer, Size> > { |
7c673cae | 379 | public: |
9f95a23c TL |
380 | typedef typename std::remove_const< |
381 | typename internal::PointeeOf<ElementPointer>::type>::type RawElement; | |
7c673cae FG |
382 | typedef internal::NativeArray<RawElement> type; |
383 | typedef const type const_reference; | |
384 | ||
385 | static const_reference ConstReference( | |
9f95a23c TL |
386 | const ::std::tuple<ElementPointer, Size>& array) { |
387 | return type(std::get<0>(array), std::get<1>(array), | |
388 | RelationToSourceReference()); | |
7c673cae | 389 | } |
9f95a23c TL |
390 | static type Copy(const ::std::tuple<ElementPointer, Size>& array) { |
391 | return type(std::get<0>(array), std::get<1>(array), RelationToSourceCopy()); | |
7c673cae FG |
392 | } |
393 | }; | |
394 | ||
395 | // The following specialization prevents the user from instantiating | |
396 | // StlContainer with a reference type. | |
397 | template <typename T> class StlContainerView<T&>; | |
398 | ||
399 | // A type transform to remove constness from the first part of a pair. | |
400 | // Pairs like that are used as the value_type of associative containers, | |
401 | // and this transform produces a similar but assignable pair. | |
402 | template <typename T> | |
403 | struct RemoveConstFromKey { | |
404 | typedef T type; | |
405 | }; | |
406 | ||
407 | // Partially specialized to remove constness from std::pair<const K, V>. | |
408 | template <typename K, typename V> | |
409 | struct RemoveConstFromKey<std::pair<const K, V> > { | |
410 | typedef std::pair<K, V> type; | |
411 | }; | |
412 | ||
9f95a23c TL |
413 | // Emit an assertion failure due to incorrect DoDefault() usage. Out-of-lined to |
414 | // reduce code size. | |
415 | GTEST_API_ void IllegalDoDefault(const char* file, int line); | |
416 | ||
417 | template <typename F, typename Tuple, size_t... Idx> | |
418 | auto ApplyImpl(F&& f, Tuple&& args, IndexSequence<Idx...>) -> decltype( | |
419 | std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...)) { | |
420 | return std::forward<F>(f)(std::get<Idx>(std::forward<Tuple>(args))...); | |
421 | } | |
422 | ||
423 | // Apply the function to a tuple of arguments. | |
424 | template <typename F, typename Tuple> | |
425 | auto Apply(F&& f, Tuple&& args) | |
426 | -> decltype(ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args), | |
427 | MakeIndexSequence<std::tuple_size<Tuple>::value>())) { | |
428 | return ApplyImpl(std::forward<F>(f), std::forward<Tuple>(args), | |
429 | MakeIndexSequence<std::tuple_size<Tuple>::value>()); | |
430 | } | |
431 | ||
432 | // Template struct Function<F>, where F must be a function type, contains | |
433 | // the following typedefs: | |
434 | // | |
435 | // Result: the function's return type. | |
436 | // Arg<N>: the type of the N-th argument, where N starts with 0. | |
437 | // ArgumentTuple: the tuple type consisting of all parameters of F. | |
438 | // ArgumentMatcherTuple: the tuple type consisting of Matchers for all | |
439 | // parameters of F. | |
440 | // MakeResultVoid: the function type obtained by substituting void | |
441 | // for the return type of F. | |
442 | // MakeResultIgnoredValue: | |
443 | // the function type obtained by substituting Something | |
444 | // for the return type of F. | |
445 | template <typename T> | |
446 | struct Function; | |
447 | ||
448 | template <typename R, typename... Args> | |
449 | struct Function<R(Args...)> { | |
450 | using Result = R; | |
451 | static constexpr size_t ArgumentCount = sizeof...(Args); | |
452 | template <size_t I> | |
453 | using Arg = ElemFromList<I, Args...>; | |
454 | using ArgumentTuple = std::tuple<Args...>; | |
455 | using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>; | |
456 | using MakeResultVoid = void(Args...); | |
457 | using MakeResultIgnoredValue = IgnoredValue(Args...); | |
458 | }; | |
459 | ||
460 | template <typename R, typename... Args> | |
461 | constexpr size_t Function<R(Args...)>::ArgumentCount; | |
462 | ||
463 | #ifdef _MSC_VER | |
464 | # pragma warning(pop) | |
465 | #endif | |
7c673cae FG |
466 | |
467 | } // namespace internal | |
468 | } // namespace testing | |
469 | ||
470 | #endif // GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_INTERNAL_UTILS_H_ |