Merge 2aa1e7cc67feb634cc25d6d32e2cb32f0988a886 into 7140cd416cecd7462a8aae488024abeee55598e4

PiperOrigin-RevId: 925686474
Change-Id: I7b5d7e82dc8618d6914844446fa260468b947ece

CMakeLists.txt

@@ -3,6 +3,7 @@
 
 cmake_minimum_required(VERSION 3.16)
 
+cmake_policy(SET CMP0129 NEW)
 project(googletest-distribution)
 set(GOOGLETEST_VERSION 1.16.0)
 

docs/gmock_cook_book.md

@@ -3386,30 +3386,6 @@ With this definition, the above assertion will give a better message:
     Actual: 27 (the remainder is 6)
 ```
 
-#### Using EXPECT_ Statements in Matchers
-
-You can also use `EXPECT_...` statements inside custom matcher definitions. In
-many cases, this allows you to write your matcher more concisely while still
-providing an informative error message. For example:
-
-```cpp
-MATCHER(IsDivisibleBy7, "") {
-  const auto remainder = arg % 7;
-  EXPECT_EQ(remainder, 0);
-  return true;
-}
-```
-
-If you write a test that includes the line `EXPECT_THAT(27, IsDivisibleBy7());`,
-you will get an error something like the following:
-
-```shell
-Expected equality of these values:
-  remainder
-    Which is: 6
-  0
-```
-
 #### `MatchAndExplain`
 
 You should let `MatchAndExplain()` print *any additional information* that can
@@ -3429,6 +3405,66 @@ the value of `(arg % 7) == 0` can be implicitly converted to a `bool`. In the
 `arg_type` will be `int`; if it takes an `unsigned long`, `arg_type` will be
 `unsigned long`; and so on.
 
+#### Anti-pattern: Using EXPECT_ Statements in Matchers
+
+Using `EXPECT_...` statements inside custom matcher definitions is an
+**anti-pattern** and should be avoided.
+
+While it might appear to write matchers more concisely and generate informative
+messages, this pattern has critical issues:
+
+1.  **Negation Breakage (`Not`):** If wrapped in `Not(IsDivisibleBy7())`,
+    evaluating it still triggers the internal `EXPECT_EQ`, registering a test
+    failure on the runner even when the overall assertion is expected to
+    succeed.
+2.  **Composition / Container Breakage (`AnyOf`, `AllOf`, `Contains`):** When
+    composed or used inside container matchers, elements that are expected
+    mismatches will trigger the internal `EXPECT_` and register spurious
+    failures.
+3.  **ASSERT_* compilation errors:** `ASSERT_*` macros use `return;` to abort
+    from a void function. Since matchers return `bool`, using `ASSERT_` inside
+    them triggers a compilation error.
+4.  **Purity Violations:** Matchers must be functionally pure (side-effect
+    free), whereas registering global failures is a major side effect.
+5.  **Line Number Confusion:** Failure reports point to the matcher's definition
+    line rather than the calling `EXPECT_THAT`
+    line.
+
+##### The Anti-Pattern
+
+```cpp
+// Anti-pattern: Do not do this!
+MATCHER(IsDivisibleBy7, "") {
+  const auto remainder = arg % 7;
+  EXPECT_EQ(remainder, 0);  // Spurious failures if negated/composed!
+  return true;
+}
+```
+
+##### The Correct Solution
+
+To write concise matchers that delegate to other matchers and safely propagate
+the mismatch explanation, use **`::testing::ExplainMatchResult`** instead,
+passing it the sub-matcher, the value to check, and the `result_listener`:
+
+```cpp
+MATCHER(IsDivisibleBy7, "") {
+  const auto remainder = arg % 7;
+  return ::testing::ExplainMatchResult(::testing::Eq(0), remainder,
+                                       result_listener);
+}
+```
+
+If you write a test that includes the line:
+
+```cpp
+EXPECT_THAT(28, Not(IsDivisibleBy7()));
+```
+
+it will correctly report the mismatch, properly point to the `EXPECT_THAT` line
+number, and support negation (`Not`) and composition (`AllOf`, `AnyOf`, etc.)
+without registering spurious failures.
+
 ### Writing New Parameterized Matchers Quickly
 
 Sometimes you'll want to define a matcher that has parameters. For that you can

googlemock/CMakeLists.txt

@@ -37,6 +37,7 @@ endif()
 # ${gmock_BINARY_DIR}.
 # Language "C" is required for find_package(Threads).
 cmake_minimum_required(VERSION 3.13)
+cmake_policy(SET CMP0129 NEW)
 project(gmock VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
 
 if (COMMAND set_up_hermetic_build)

googlemock/include/gmock/gmock-spec-builders.h

@@ -1957,6 +1957,11 @@ struct SignatureOf<R(Args...)> {
   using type = R(Args...);
 };
 
+template <typename R, typename... Args>
+struct SignatureOf<R(Args...) const> {
+  using type = R(Args...);
+};
+
 template <template <typename> class C, typename F>
 struct SignatureOf<C<F>,
                    typename std::enable_if<std::is_function<F>::value>::type>

googlemock/test/gmock-function-mocker_test.cc

@@ -942,6 +942,15 @@ static constexpr bool IsMockFunctionTemplateArgumentDeducedTo(
 
 }  // namespace
 
+// Like std::add_const, but for function types.
+template <typename F>
+struct AddConstToFunction;
+
+template <typename R, typename... Args>
+struct AddConstToFunction<R(Args...)> {
+  using type = R(Args...) const;
+};
+
 template <typename F>
 class MockMethodMockFunctionSignatureTest : public Test {};
 
@@ -953,25 +962,69 @@ TYPED_TEST_SUITE(MockMethodMockFunctionSignatureTest,
 
 TYPED_TEST(MockMethodMockFunctionSignatureTest,
            IsMockFunctionTemplateArgumentDeducedForRawSignature) {
-  using Argument = TypeParam;
+  // Non-const
-  MockFunction<Argument> foo;
+  {
-  EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<TypeParam>(foo));
+    using Argument = TypeParam;
+    MockFunction<Argument> foo;
+    EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<TypeParam>(foo));
+  }
+
+  // Const
+  {
+    using Argument = typename AddConstToFunction<TypeParam>::type;
+    MockFunction<Argument> foo;
+    EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<TypeParam>(foo));
+  }
 }
 
 TYPED_TEST(MockMethodMockFunctionSignatureTest,
            IsMockFunctionTemplateArgumentDeducedForStdFunction) {
-  using Argument = std::function<TypeParam>;
+  // Non-const
-  MockFunction<Argument> foo;
+  {
-  EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<TypeParam>(foo));
+    using Argument = std::function<TypeParam>;
+    MockFunction<Argument> foo;
+    EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<TypeParam>(foo));
+  }
+
+// As of 2026-05 MSVC doesn't know how to deal with this, providing pages of
+// inscrutable errors about std::_Get_function_impl. But this is fine, since
+// std::function<R(Args...) const> doesn't apply the const qualifier correctly
+// anyway.
+#if !defined(_MSC_VER)
+
+  // Const
+  {
+    using Argument =
+        std::function<typename AddConstToFunction<TypeParam>::type>;
+
+    MockFunction<Argument> foo;
+    EXPECT_TRUE(IsMockFunctionTemplateArgumentDeducedTo<TypeParam>(foo));
+  }
+
+#endif
 }
 
 TYPED_TEST(
     MockMethodMockFunctionSignatureTest,
     IsMockFunctionCallMethodSignatureTheSameForRawSignatureAndStdFunction) {
-  using ForRawSignature = decltype(&MockFunction<TypeParam>::Call);
+  // Non-const
-  using ForStdFunction =
+  {
-      decltype(&MockFunction<std::function<TypeParam>>::Call);
+    using ForRawSignature = decltype(&MockFunction<TypeParam>::Call);
-  EXPECT_TRUE((std::is_same<ForRawSignature, ForStdFunction>::value));
+    using ForStdFunction =
+        decltype(&MockFunction<std::function<TypeParam>>::Call);
+    EXPECT_TRUE((std::is_same<ForRawSignature, ForStdFunction>::value));
+  }
+
+  // Const
+  {
+    using ConstTypeParam = typename AddConstToFunction<TypeParam>::type;
+    using ForRawSignature = decltype(&MockFunction<ConstTypeParam>::Call);
+
+    using ForStdFunction =
+        decltype(&MockFunction<std::function<ConstTypeParam>>::Call);
+
+    EXPECT_TRUE((std::is_same<ForRawSignature, ForStdFunction>::value));
+  }
 }
 
 template <typename F>

googletest/CMakeLists.txt

@@ -47,6 +47,7 @@ endif()
 # Project version.
 
 cmake_minimum_required(VERSION 3.13)
+cmake_policy(SET CMP0129 NEW)
 project(gtest VERSION ${GOOGLETEST_VERSION} LANGUAGES CXX C)
 
 if (COMMAND set_up_hermetic_build)

googletest/cmake/internal_utils.cmake

@@ -102,9 +102,11 @@ macro(config_compiler_and_linker)
     if (CMAKE_CXX_COMPILER_ID STREQUAL "IntelLLVM")
       set(cxx_base_flags "${cxx_base_flags} -Wno-implicit-float-size-conversion -ffp-model=precise")
     endif()
-  elseif (CMAKE_COMPILER_IS_GNUCXX)
+  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU" OR
-    set(cxx_base_flags "-Wall -Wshadow -Wundef")
+      CMAKE_CXX_COMPILER_ID STREQUAL "LCC")
-    if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0)
+    set(cxx_base_flags "-Wall -Wundef")
+    if(CMAKE_CXX_COMPILER_ID STREQUAL "GNU" AND
+        NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 7.0.0)
       set(cxx_base_flags "${cxx_base_flags} -Wno-error=dangling-else")
     endif()
     set(cxx_exception_flags "-fexceptions")
@@ -115,6 +117,11 @@ macro(config_compiler_and_linker)
     set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
     set(cxx_strict_flags
       "-Wextra -Wno-unused-parameter -Wno-missing-field-initializers")
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "LCC")
+      set(cxx_base_flags "${cxx_base_flags} -Wno-unused-variable -Wno-unused-but-set-variable -Wno-unused-function")
+    else()
+      set(cxx_base_flags "${cxx_base_flags} -Wshadow")
+    endif()
   elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
     set(cxx_exception_flags "-features=except")
     # Sun Pro doesn't provide macros to indicate whether exceptions and

googletest/include/gtest/gtest-message.h

@@ -129,7 +129,7 @@ class GTEST_API_ Message {
                               int>::type = 0
 #endif  // GTEST_HAS_ABSL
       >
-  inline Message& operator<<(const T& val) {
+  Message& operator<<(const T& val) {
         // Some libraries overload << for STL containers.  These
     // overloads are defined in the global namespace instead of ::std.
     //
@@ -155,7 +155,7 @@ class GTEST_API_ Message {
   template <typename T,
             typename std::enable_if<absl::HasAbslStringify<T>::value,  // NOLINT
                                     int>::type = 0>
-  inline Message& operator<<(const T& val) {
+  Message& operator<<(const T& val) {
     // ::operator<< is needed here for a similar reason as with the non-Abseil
     // version above
     using ::operator<<;

googletest/include/gtest/internal/gtest-death-test-internal.h

@@ -229,7 +229,8 @@ GTEST_API_ bool ExitedUnsuccessfully(int exit_status);
       goto GTEST_CONCAT_TOKEN_(gtest_label_, __LINE__);                        \
     }                                                                          \
     if (gtest_dt != nullptr) {                                                 \
-      std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(gtest_dt); \
+      const std::unique_ptr< ::testing::internal::DeathTest> gtest_dt_ptr(     \
+          gtest_dt);                                                           \
       switch (gtest_dt->AssumeRole()) {                                        \
         case ::testing::internal::DeathTest::OVERSEE_TEST:                     \
           if (!gtest_dt->Passed(predicate(gtest_dt->Wait()))) {                \

googletest/include/gtest/internal/gtest-port.h

@@ -864,7 +864,7 @@ typedef struct _RTL_CRITICAL_SECTION GTEST_CRITICAL_SECTION;
 // Ask the compiler not to perform tail call optimization inside
 // the marked function.
 #define GTEST_NO_TAIL_CALL_ __attribute__((disable_tail_calls))
-#elif defined(__GNUC__) && !defined(__NVCOMPILER)
+#elif defined(__GNUC__) && !defined(__EDG__)
 #define GTEST_NO_TAIL_CALL_ \
   __attribute__((optimize("no-optimize-sibling-calls")))
 #else

googletest/test/googletest-list-tests-unittest.py

@@ -74,7 +74,7 @@ TypedTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
 TypedTest/1\.  # TypeParam = int\s*\*( __ptr64)?
   TestA
   TestB
-TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
+TypedTest/2\.  # TypeParam = .*MyArray<bool,\s*(\(int\))?42>
   TestA
   TestB
 My/TypeParamTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
@@ -83,7 +83,7 @@ My/TypeParamTest/0\.  # TypeParam = (VeryLo{245}|class VeryLo{239})\.\.\.
 My/TypeParamTest/1\.  # TypeParam = int\s*\*( __ptr64)?
   TestA
   TestB
-My/TypeParamTest/2\.  # TypeParam = .*MyArray<bool,\s*42>
+My/TypeParamTest/2\.  # TypeParam = .*MyArray<bool,\s*(\(int\))?42>
   TestA
   TestB
 MyInstantiation/ValueParamTest\.

googletest/test/googletest-output-test_.cc

@@ -720,6 +720,7 @@ class TypedTestNames {
       return std::string("char") + ::testing::PrintToString(i);
     if (std::is_same<T, int>::value)
       return std::string("int") + ::testing::PrintToString(i);
+    return std::string("unknown");
   }
 };
 
@@ -755,6 +756,7 @@ class TypedTestPNames {
     if (std::is_same<T, unsigned int>::value) {
       return std::string("unsignedInt") + ::testing::PrintToString(i);
     }
+    return std::string("unknown");
   }
 };
 

googletest/test/gtest-typed-test_test.cc

@@ -172,6 +172,7 @@ class TypedTestNames {
     if (std::is_same<T, int>::value) {
       return std::string("int") + ::testing::PrintToString(i);
     }
+    return std::string("unknown");
   }
 };
 
@@ -320,6 +321,7 @@ class TypeParametrizedTestNames {
     if (std::is_same<T, int>::value) {
       return std::string("parInt") + ::testing::PrintToString(i);
     }
+    return std::string("unknown");
   }
 };