Property: Promote note to warning

Property() should not be used against member functions that you do not own.  Make
this warning more prominent in matchers.md and add it to gmock-matchers.h.

PiperOrigin-RevId: 727753777
Change-Id: Idf9155103b04b98efc957ff0d0cf3a8d8662eb72

CMakeLists.txt

@@ -1,10 +1,10 @@
 # Note: CMake support is community-based. The maintainers do not use CMake
 # internally.
 
-cmake_minimum_required(VERSION 3.13)
+cmake_minimum_required(VERSION 3.16)
 
 project(googletest-distribution)
-set(GOOGLETEST_VERSION 1.15.2)
+set(GOOGLETEST_VERSION 1.16.0)
 
 if(NOT CYGWIN AND NOT MSYS AND NOT ${CMAKE_SYSTEM_NAME} STREQUAL QNX)
   set(CMAKE_CXX_EXTENSIONS OFF)

README.md

@@ -9,7 +9,7 @@ GoogleTest now follows the
 We recommend
 [updating to the latest commit in the `main` branch as often as possible](https://github.com/abseil/abseil-cpp/blob/master/FAQ.md#what-is-live-at-head-and-how-do-i-do-it).
 We do publish occasional semantic versions, tagged with
-`v${major}.${minor}.${patch}` (e.g. `v1.15.2`).
+`v${major}.${minor}.${patch}` (e.g. `v1.16.0`).
 
 #### Documentation Updates
 
@@ -17,12 +17,15 @@ Our documentation is now live on GitHub Pages at
 https://google.github.io/googletest/. We recommend browsing the documentation on
 GitHub Pages rather than directly in the repository.
 
-#### Release 1.15.2
+#### Release 1.16.0
 
-[Release 1.15.2](https://github.com/google/googletest/releases/tag/v1.15.2) is
+[Release 1.16.0](https://github.com/google/googletest/releases/tag/v1.16.0) is
 now available.
 
-The 1.15.x branch requires at least C++14.
+The 1.16.x branch requires at least C++14.
+
+The 1.16.x branch will be the last to support C++14. Future development will
+[require at least C++17](https://opensource.google/documentation/policies/cplusplus-support#c_language_standard).
 
 #### Continuous Integration
 

ci/linux-presubmit.sh

@@ -39,43 +39,60 @@ if [[ -z ${GTEST_ROOT:-} ]]; then
 fi
 
 if [[ -z ${STD:-} ]]; then
-  STD="c++14 c++17 c++20"
+  STD="c++17 c++20"
 fi
 
-# Test the CMake build
-for cc in /usr/local/bin/gcc /opt/llvm/clang/bin/clang; do
-  for cmake_off_on in OFF ON; do
-    time docker run \
-      --volume="${GTEST_ROOT}:/src:ro" \
-      --tmpfs="/build:exec" \
-      --workdir="/build" \
-      --rm \
-      --env="CC=${cc}" \
-      --env=CXXFLAGS="-Werror -Wdeprecated" \
-      ${LINUX_LATEST_CONTAINER} \
-      /bin/bash -c "
-        cmake /src \
-          -DCMAKE_CXX_STANDARD=14 \
-          -Dgtest_build_samples=ON \
-          -Dgtest_build_tests=ON \
-          -Dgmock_build_tests=ON \
-          -Dcxx_no_exception=${cmake_off_on} \
-          -Dcxx_no_rtti=${cmake_off_on} && \
-        make -j$(nproc) && \
-        ctest -j$(nproc) --output-on-failure"
-  done
+# Test CMake + GCC
+for cmake_off_on in OFF ON; do
+  time docker run \
+    --volume="${GTEST_ROOT}:/src:ro" \
+    --tmpfs="/build:exec" \
+    --workdir="/build" \
+    --rm \
+    --env="CC=/usr/local/bin/gcc" \
+    --env=CXXFLAGS="-Werror -Wdeprecated" \
+    ${LINUX_LATEST_CONTAINER} \
+    /bin/bash -c "
+      cmake /src \
+        -DCMAKE_CXX_STANDARD=17 \
+        -Dgtest_build_samples=ON \
+        -Dgtest_build_tests=ON \
+        -Dgmock_build_tests=ON \
+        -Dcxx_no_exception=${cmake_off_on} \
+        -Dcxx_no_rtti=${cmake_off_on} && \
+      make -j$(nproc) && \
+      ctest -j$(nproc) --output-on-failure"
+done
+
+# Test CMake + Clang
+for cmake_off_on in OFF ON; do
+  time docker run \
+    --volume="${GTEST_ROOT}:/src:ro" \
+    --tmpfs="/build:exec" \
+    --workdir="/build" \
+    --rm \
+    --env="CC=/opt/llvm/clang/bin/clang" \
+    --env=CXXFLAGS="-Werror -Wdeprecated --gcc-toolchain=/usr/local" \
+    ${LINUX_LATEST_CONTAINER} \
+    /bin/bash -c "
+      cmake /src \
+        -DCMAKE_CXX_STANDARD=17 \
+        -Dgtest_build_samples=ON \
+        -Dgtest_build_tests=ON \
+        -Dgmock_build_tests=ON \
+        -Dcxx_no_exception=${cmake_off_on} \
+        -Dcxx_no_rtti=${cmake_off_on} && \
+      make -j$(nproc) && \
+      ctest -j$(nproc) --output-on-failure"
 done
 
 # Do one test with an older version of GCC
-# TODO(googletest-team): This currently uses Bazel 5. When upgrading to a
-# version of Bazel that supports Bzlmod, add --enable_bzlmod=false to keep test
-# coverage for the old WORKSPACE dependency management.
 time docker run \
   --volume="${GTEST_ROOT}:/src:ro" \
   --workdir="/src" \
   --rm \
   --env="CC=/usr/local/bin/gcc" \
-  --env="BAZEL_CXXOPTS=-std=c++14" \
+  --env="BAZEL_CXXOPTS=-std=c++17" \
   ${LINUX_GCC_FLOOR_CONTAINER} \
     /usr/local/bin/bazel test ... \
       --copt="-Wall" \
@@ -83,6 +100,7 @@ time docker run \
       --copt="-Wuninitialized" \
       --copt="-Wundef" \
       --copt="-Wno-error=pragmas" \
+      --enable_bzlmod=false \
       --features=external_include_paths \
       --keep_going \
       --show_timestamps \

ci/macos-presubmit.sh

@@ -31,6 +31,9 @@
 
 set -euox pipefail
 
+# Use Xcode 16.0
+sudo xcode-select -s /Applications/Xcode_16.0.app/Contents/Developer
+
 if [[ -z ${GTEST_ROOT:-} ]]; then
   GTEST_ROOT="$(realpath $(dirname ${0})/..)"
 fi
@@ -40,20 +43,20 @@ for cmake_off_on in OFF ON; do
   BUILD_DIR=$(mktemp -d build_dir.XXXXXXXX)
   cd ${BUILD_DIR}
   time cmake ${GTEST_ROOT} \
-    -DCMAKE_CXX_STANDARD=14 \
+    -DCMAKE_CXX_STANDARD=17 \
     -Dgtest_build_samples=ON \
     -Dgtest_build_tests=ON \
     -Dgmock_build_tests=ON \
     -Dcxx_no_exception=${cmake_off_on} \
     -Dcxx_no_rtti=${cmake_off_on}
-  time make
+  time make -j$(nproc)
   time ctest -j$(nproc) --output-on-failure
 done
 
 # Test the Bazel build
 
 # If we are running on Kokoro, check for a versioned Bazel binary.
-KOKORO_GFILE_BAZEL_BIN="bazel-7.0.0-darwin-x86_64"
+KOKORO_GFILE_BAZEL_BIN="bazel-8.0.0-darwin-x86_64"
 if [[ ${KOKORO_GFILE_DIR:-} ]] && [[ -f ${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN} ]]; then
   BAZEL_BIN="${KOKORO_GFILE_DIR}/${KOKORO_GFILE_BAZEL_BIN}"
   chmod +x ${BAZEL_BIN}
@@ -67,7 +70,7 @@ for absl in 0 1; do
     --copt="-Wall" \
     --copt="-Werror" \
     --copt="-Wundef" \
-    --cxxopt="-std=c++14" \
+    --cxxopt="-std=c++17" \
     --define="absl=${absl}" \
     --enable_bzlmod=true \
     --features=external_include_paths \

ci/windows-presubmit.bat

@@ -1,6 +1,6 @@
 SETLOCAL ENABLEDELAYEDEXPANSION
 
-SET BAZEL_EXE=%KOKORO_GFILE_DIR%\bazel-7.0.0-windows-x86_64.exe
+SET BAZEL_EXE=%KOKORO_GFILE_DIR%\bazel-8.0.0-windows-x86_64.exe
 
 SET PATH=C:\Python34;%PATH%
 SET BAZEL_PYTHON=C:\python34\python.exe
@@ -11,21 +11,18 @@ SET CTEST_OUTPUT_ON_FAILURE=1
 SET CMAKE_BUILD_PARALLEL_LEVEL=16
 SET CTEST_PARALLEL_LEVEL=16
 
-IF EXIST git\googletest (
-  CD git\googletest
-) ELSE IF EXIST github\googletest (
-  CD github\googletest
-)
-
+SET GTEST_ROOT=%~dp0\..
 IF %errorlevel% neq 0 EXIT /B 1
 
 :: ----------------------------------------------------------------------------
 :: CMake
-MKDIR cmake_msvc2022
-CD cmake_msvc2022
+SET CMAKE_BUILD_PATH=cmake_msvc2022
+MKDIR %CMAKE_BUILD_PATH%
+CD %CMAKE_BUILD_PATH%
 
-%CMAKE_BIN% .. ^
+%CMAKE_BIN% %GTEST_ROOT% ^
   -G "Visual Studio 17 2022" ^
+  -DCMAKE_CXX_STANDARD=17 ^
   -DPYTHON_EXECUTABLE:FILEPATH=c:\python37\python.exe ^
   -DPYTHON_INCLUDE_DIR:PATH=c:\python37\include ^
   -DPYTHON_LIBRARY:FILEPATH=c:\python37\lib\site-packages\pip ^
@@ -40,8 +37,8 @@ IF %errorlevel% neq 0 EXIT /B 1
 %CTEST_BIN% -C Debug --timeout 600
 IF %errorlevel% neq 0 EXIT /B 1
 
-CD ..
-RMDIR /S /Q cmake_msvc2022
+CD %GTEST_ROOT%
+RMDIR /S /Q %CMAKE_BUILD_PATH%
 
 :: ----------------------------------------------------------------------------
 :: Bazel
@@ -50,11 +47,26 @@ RMDIR /S /Q cmake_msvc2022
 :: because of Windows limitations on path length.
 :: --output_user_root=C:\tmp causes Bazel to use a shorter path.
 SET BAZEL_VS=C:\Program Files\Microsoft Visual Studio\2022\Community
+
+:: C++17
 %BAZEL_EXE% ^
   --output_user_root=C:\tmp ^
   test ... ^
   --compilation_mode=dbg ^
-  --copt=/std:c++14 ^
+  --copt=/std:c++17 ^
+  --copt=/WX ^
+  --enable_bzlmod=true ^
+  --keep_going ^
+  --test_output=errors ^
+  --test_tag_filters=-no_test_msvc2017
+IF %errorlevel% neq 0 EXIT /B 1
+
+:: C++20
+%BAZEL_EXE% ^
+  --output_user_root=C:\tmp ^
+  test ... ^
+  --compilation_mode=dbg ^
+  --copt=/std:c++20 ^
   --copt=/WX ^
   --enable_bzlmod=true ^
   --keep_going ^

docs/reference/actions.md

@@ -24,7 +24,8 @@ provided by GoogleTest. All actions are defined in the `::testing` namespace.
 | :--------------------------------- | :-------------------------------------- |
 | `Assign(&variable, value)` | Assign `value` to variable. |
 | `DeleteArg<N>()` | Delete the `N`-th (0-based) argument, which must be a pointer. |
-| `SaveArg<N>(pointer)` | Save the `N`-th (0-based) argument to `*pointer`. |
+| `SaveArg<N>(pointer)` | Save the `N`-th (0-based) argument to `*pointer` by copy-assignment. |
+| `SaveArgByMove<N>(pointer)` | Save the `N`-th (0-based) argument to `*pointer` by move-assignment. |
 | `SaveArgPointee<N>(pointer)` | Save the value pointed to by the `N`-th (0-based) argument to `*pointer`. |
 | `SetArgReferee<N>(value)` | Assign `value` to the variable referenced by the `N`-th (0-based) argument. |
 | `SetArgPointee<N>(value)` | Assign `value` to the variable pointed by the `N`-th (0-based) argument. |

docs/reference/matchers.md

@@ -171,6 +171,11 @@ messages, you can use:
 | `Property(&class::property, m)` | `argument.property()` (or `argument->property()` when `argument` is a plain pointer) matches matcher `m`, where `argument` is an object of type _class_. The method `property()` must take no argument and be declared as `const`. |
 | `Property(property_name, &class::property, m)` | The same as the two-parameter version, but provides a better error message.
 
+{: .callout .warning}
+Warning: Don't use `Property()` against member functions that you do not own,
+because taking addresses of functions is fragile and generally not part of the
+contract of the function.
+
 **Notes:**
 
 *   You can use `FieldsAre()` to match any type that supports structured
@@ -189,10 +194,6 @@ messages, you can use:
     EXPECT_THAT(s, FieldsAre(42, "aloha"));
     ```
 
-*   Don't use `Property()` against member functions that you do not own, because
-    taking addresses of functions is fragile and generally not part of the
-    contract of the function.
-
 ## Matching the Result of a Function, Functor, or Callback
 
 | Matcher          | Description                                       |

googlemock/include/gmock/gmock-actions.h

@@ -1720,6 +1720,16 @@ struct SaveArgAction {
   }
 };
 
+template <size_t k, typename Ptr>
+struct SaveArgByMoveAction {
+  Ptr pointer;
+
+  template <typename... Args>
+  void operator()(Args&&... args) const {
+    *pointer = std::move(std::get<k>(std::tie(args...)));
+  }
+};
+
 template <size_t k, typename Ptr>
 struct SaveArgPointeeAction {
   Ptr pointer;
@@ -2070,6 +2080,13 @@ internal::SaveArgAction<k, Ptr> SaveArg(Ptr pointer) {
   return {pointer};
 }
 
+// Action SaveArgByMove<k>(pointer) moves the k-th (0-based) argument of the
+// mock function into *pointer.
+template <size_t k, typename Ptr>
+internal::SaveArgByMoveAction<k, Ptr> SaveArgByMove(Ptr pointer) {
+  return {pointer};
+}
+
 // Action SaveArgPointee<k>(pointer) saves the value pointed to
 // by the k-th (0-based) argument of the mock function to *pointer.
 template <size_t k, typename Ptr>

googlemock/include/gmock/gmock-matchers.h

@@ -4453,6 +4453,10 @@ inline PolymorphicMatcher<internal::FieldMatcher<Class, FieldType>> Field(
 // matches 'matcher'.  For example,
 //   Property(&Foo::str, StartsWith("hi"))
 // matches a Foo object x if and only if x.str() starts with "hi".
+//
+// Warning: Don't use `Property()` against member functions that you do not
+// own, because taking addresses of functions is fragile and generally not part
+// of the contract of the function.
 template <typename Class, typename PropertyType, typename PropertyMatcher>
 inline PolymorphicMatcher<internal::PropertyMatcher<
     Class, PropertyType, PropertyType (Class::*)() const>>

googlemock/test/gmock-actions_test.cc

@@ -222,8 +222,8 @@ TEST(TypeTraits, IsInvocableRV) {
   // In C++17 and above, where it's guaranteed that functions can return
   // non-moveable objects, everything should work fine for non-moveable rsult
   // types too.
-#if defined(GTEST_INTERNAL_CPLUSPLUS_LANG) && \
-    GTEST_INTERNAL_CPLUSPLUS_LANG >= 201703L
+  // TODO(b/396121064) - Fix this test under MSVC
+#ifndef _MSC_VER
   {
     struct NonMoveable {
       NonMoveable() = default;
@@ -244,7 +244,7 @@ TEST(TypeTraits, IsInvocableRV) {
     static_assert(!internal::is_callable_r<int, Callable>::value);
     static_assert(!internal::is_callable_r<NonMoveable, Callable, int>::value);
   }
-#endif  // C++17 and above
+#endif  // _MSC_VER
 
   // Nothing should choke when we try to call other arguments besides directly
   // callable objects, but they should not show up as callable.

googlemock/test/gmock-more-actions_test.cc

@@ -59,6 +59,7 @@ using testing::Invoke;
 using testing::ReturnArg;
 using testing::ReturnPointee;
 using testing::SaveArg;
+using testing::SaveArgByMove;
 using testing::SaveArgPointee;
 using testing::SetArgReferee;
 using testing::Unused;
@@ -492,6 +493,34 @@ TEST(SaveArgActionTest, WorksForCompatibleType) {
   EXPECT_EQ('a', result);
 }
 
+struct MoveOnly {
+  explicit MoveOnly(int v) : i(v) {}
+  MoveOnly(MoveOnly&& o) {
+    i = o.i;
+    o.i = -1;
+  }
+  MoveOnly& operator=(MoveOnly&& o) {
+    i = o.i;
+    o.i = -1;
+    return *this;
+  }
+  int i;
+};
+
+TEST(SaveArgByMoveActionTest, WorksForSameType) {
+  MoveOnly result{0};
+  const Action<void(MoveOnly v)> a1 = SaveArgByMove<0>(&result);
+  a1.Perform(std::make_tuple(MoveOnly{5}));
+  EXPECT_EQ(5, result.i);
+}
+
+TEST(SaveArgByMoveActionTest, WorksForCompatibleType) {
+  MoveOnly result{0};
+  const Action<void(bool, MoveOnly)> a1 = SaveArgByMove<1>(&result);
+  a1.Perform(std::make_tuple(true, MoveOnly{7}));
+  EXPECT_EQ(7, result.i);
+}
+
 TEST(SaveArgPointeeActionTest, WorksForSameType) {
   int result = 0;
   const int value = 5;
@@ -756,34 +785,34 @@ TEST(InvokeArgumentTest, Functor6) {
 
 // Tests using InvokeArgument with a 7-ary function.
 TEST(InvokeArgumentTest, Function7) {
-  Action<std::string(std::string(*)(const char*, const char*, const char*,
-                                    const char*, const char*, const char*,
-                                    const char*))>
+  Action<std::string(std::string (*)(const char*, const char*, const char*,
+                                     const char*, const char*, const char*,
+                                     const char*))>
       a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7");
   EXPECT_EQ("1234567", a.Perform(std::make_tuple(&Concat7)));
 }
 
 // Tests using InvokeArgument with a 8-ary function.
 TEST(InvokeArgumentTest, Function8) {
-  Action<std::string(std::string(*)(const char*, const char*, const char*,
-                                    const char*, const char*, const char*,
-                                    const char*, const char*))>
+  Action<std::string(std::string (*)(const char*, const char*, const char*,
+                                     const char*, const char*, const char*,
+                                     const char*, const char*))>
       a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7", "8");
   EXPECT_EQ("12345678", a.Perform(std::make_tuple(&Concat8)));
 }
 
 // Tests using InvokeArgument with a 9-ary function.
 TEST(InvokeArgumentTest, Function9) {
-  Action<std::string(std::string(*)(const char*, const char*, const char*,
-                                    const char*, const char*, const char*,
-                                    const char*, const char*, const char*))>
+  Action<std::string(std::string (*)(const char*, const char*, const char*,
+                                     const char*, const char*, const char*,
+                                     const char*, const char*, const char*))>
       a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7", "8", "9");
   EXPECT_EQ("123456789", a.Perform(std::make_tuple(&Concat9)));
 }
 
 // Tests using InvokeArgument with a 10-ary function.
 TEST(InvokeArgumentTest, Function10) {
-  Action<std::string(std::string(*)(
+  Action<std::string(std::string (*)(
       const char*, const char*, const char*, const char*, const char*,
       const char*, const char*, const char*, const char*, const char*))>
       a = InvokeArgument<0>("1", "2", "3", "4", "5", "6", "7", "8", "9", "0");

googlemock/test/gmock-spec-builders_test.cc

@@ -804,9 +804,8 @@ TEST(ExpectCallTest, InfersCardinality1WhenThereIsWillRepeatedly) {
       "to be called at least once");
 }
 
-#if defined(GTEST_INTERNAL_CPLUSPLUS_LANG) && \
-    GTEST_INTERNAL_CPLUSPLUS_LANG >= 201703L
-
+// TODO(b/396121064) - Fix this test under MSVC
+#ifndef _MSC_VER
 // It should be possible to return a non-moveable type from a mock action in
 // C++17 and above, where it's guaranteed that such a type can be initialized
 // from a prvalue returned from a function.
@@ -847,7 +846,7 @@ TEST(ExpectCallTest, NonMoveableType) {
   EXPECT_EQ(17, mock.AsStdFunction()().x);
 }
 
-#endif  // C++17 and above
+#endif  // _MSC_VER
 
 // Tests that the n-th action is taken for the n-th matching
 // invocation.

googletest/README.md

@@ -25,7 +25,7 @@ When building GoogleTest as a standalone project, the typical workflow starts
 with
 
 ```
-git clone https://github.com/google/googletest.git -b v1.15.2
+git clone https://github.com/google/googletest.git -b v1.16.0
 cd googletest        # Main directory of the cloned repository.
 mkdir build          # Create a directory to hold the build output.
 cd build

googletest/cmake/internal_utils.cmake

@@ -195,7 +195,7 @@ function(cxx_library_with_type name type cxx_flags)
     target_link_libraries(${name} PUBLIC Threads::Threads)
   endif()
 
-  target_compile_features(${name} PUBLIC cxx_std_14)
+  target_compile_features(${name} PUBLIC cxx_std_17)
 endfunction()
 
 ########################################################################

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

@@ -275,8 +275,8 @@
 #endif
 
 #if !defined(GTEST_INTERNAL_CPLUSPLUS_LANG) || \
-    GTEST_INTERNAL_CPLUSPLUS_LANG < 201402L
-#error C++ versions less than C++14 are not supported.
+    GTEST_INTERNAL_CPLUSPLUS_LANG < 201703L
+#error C++ versions less than C++17 are not supported.
 #endif
 
 // MSVC >= 19.11 (VS 2017 Update 3) supports __has_include.

googletest/test/googletest-printers-test.cc

@@ -121,6 +121,9 @@ class UnprintableTemplateInGlobal {
 // A user-defined streamable type in the global namespace.
 class StreamableInGlobal {
  public:
+  StreamableInGlobal() = default;
+  StreamableInGlobal(const StreamableInGlobal&) = default;
+  StreamableInGlobal& operator=(const StreamableInGlobal&) = default;
   virtual ~StreamableInGlobal() = default;
 };
 
@@ -572,6 +575,8 @@ TEST(PrintU8StringTest, Null) {
 }
 
 // Tests that u8 strings are escaped properly.
+// TODO(b/396121064) - Fix this test under MSVC
+#ifndef _MSC_VER
 TEST(PrintU8StringTest, EscapesProperly) {
   const char8_t* p = u8"'\"?\\\a\b\f\n\r\t\v\x7F\xFF hello 世界";
   EXPECT_EQ(PrintPointer(p) +
@@ -579,7 +584,8 @@ TEST(PrintU8StringTest, EscapesProperly) {
                 "hello \\xE4\\xB8\\x96\\xE7\\x95\\x8C\"",
             Print(p));
 }
-#endif
+#endif  // _MSC_VER
+#endif  // __cpp_lib_char8_t
 
 // const char16_t*.
 TEST(PrintU16StringTest, Const) {

googletest/test/googletest-setuptestsuite-test_.cc

@@ -31,14 +31,14 @@
 
 class SetupFailTest : public ::testing::Test {
  protected:
-  static void SetUpTestSuite() { ASSERT_EQ("", "SET_UP_FAIL"); }
+  static void SetUpTestSuite() { ASSERT_STREQ("", "SET_UP_FAIL"); }
 };
 
 TEST_F(SetupFailTest, NoopPassingTest) {}
 
 class TearDownFailTest : public ::testing::Test {
  protected:
-  static void TearDownTestSuite() { ASSERT_EQ("", "TEAR_DOWN_FAIL"); }
+  static void TearDownTestSuite() { ASSERT_STREQ("", "TEAR_DOWN_FAIL"); }
 };
 
 TEST_F(TearDownFailTest, NoopPassingTest) {}