diff --git a/googlemock/CMakeLists.txt b/googlemock/CMakeLists.txt
index ead51bf3..21d61b13 100644
--- a/googlemock/CMakeLists.txt
+++ b/googlemock/CMakeLists.txt
@@ -1,225 +1,225 @@
 ########################################################################
 # CMake build script for Google Mock.
 #
 # To run the tests for Google Mock itself on Linux, use 'make test' or
 # ctest.  You can select which tests to run using 'ctest -R regex'.
 # For more options, run 'ctest --help'.
 
 # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
 # make it prominent in the GUI.
 option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)
 
 option(gmock_build_tests "Build all of Google Mock's own tests." OFF)
 
 # A directory to find Google Test sources.
 if (EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/gtest/CMakeLists.txt")
   set(gtest_dir gtest)
 else()
   set(gtest_dir ../googletest)
 endif()
 
 # Defines pre_project_set_up_hermetic_build() and set_up_hermetic_build().
 include("${gtest_dir}/cmake/hermetic_build.cmake" OPTIONAL)
 
 if (COMMAND pre_project_set_up_hermetic_build)
   # Google Test also calls hermetic setup functions from add_subdirectory,
   # although its changes will not affect things at the current scope.
   pre_project_set_up_hermetic_build()
 endif()
 
 ########################################################################
 #
 # Project-wide settings
 
 # Name of the project.
 #
 # CMake files in this project can refer to the root source directory
 # as ${gmock_SOURCE_DIR} and to the root binary directory as
 # ${gmock_BINARY_DIR}.
 # Language "C" is required for find_package(Threads).
 if (CMAKE_VERSION VERSION_LESS 3.0)
   project(gmock CXX C)
 else()
   cmake_policy(SET CMP0048 NEW)
   project(gmock VERSION 1.9.0 LANGUAGES CXX C)
 endif()
 cmake_minimum_required(VERSION 2.6.4)
 
 if (COMMAND set_up_hermetic_build)
   set_up_hermetic_build()
 endif()
 
 # Instructs CMake to process Google Test's CMakeLists.txt and add its
 # targets to the current scope.  We are placing Google Test's binary
 # directory in a subdirectory of our own as VC compilation may break
 # if they are the same (the default).
 add_subdirectory("${gtest_dir}" "${gmock_BINARY_DIR}/gtest")
 
 # Although Google Test's CMakeLists.txt calls this function, the
 # changes there don't affect the current scope.  Therefore we have to
 # call it again here.
 config_compiler_and_linker()  # from ${gtest_dir}/cmake/internal_utils.cmake
 
 # Adds Google Mock's and Google Test's header directories to the search path.
 include_directories("${gmock_SOURCE_DIR}/include"
                     "${gmock_SOURCE_DIR}"
                     "${gtest_SOURCE_DIR}/include"
                     # This directory is needed to build directly from Google
                     # Test sources.
                     "${gtest_SOURCE_DIR}")
 
 # Summary of tuple support for Microsoft Visual Studio:
 # Compiler    version(MS)  version(cmake)  Support
 # ----------  -----------  --------------  -----------------------------
 # <= VS 2010  <= 10        <= 1600         Use Google Tests's own tuple.
 # VS 2012     11           1700            std::tr1::tuple + _VARIADIC_MAX=10
 # VS 2013     12           1800            std::tr1::tuple
 # VS 2015     14           1900            std::tuple
 # VS 2017     15           >= 1910         std::tuple
 if (MSVC AND MSVC_VERSION EQUAL 1700)
   add_definitions(/D _VARIADIC_MAX=10)
 endif()
 
 ########################################################################
 #
 # Defines the gmock & gmock_main libraries.  User tests should link
 # with one of them.
 
 # Google Mock libraries.  We build them using more strict warnings than what
 # are used for other targets, to ensure that Google Mock can be compiled by
 # a user aggressive about warnings.
 cxx_library(gmock
             "${cxx_strict}"
             "${gtest_dir}/src/gtest-all.cc"
             src/gmock-all.cc)
 
 cxx_library(gmock_main
             "${cxx_strict}"
             "${gtest_dir}/src/gtest-all.cc"
             src/gmock-all.cc
             src/gmock_main.cc)
 
 # If the CMake version supports it, attach header directory information
 # to the targets for when we are part of a parent build (ie being pulled
 # in via add_subdirectory() rather than being a standalone build).
 if (DEFINED CMAKE_VERSION AND NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
   target_include_directories(gmock      SYSTEM INTERFACE "${gmock_SOURCE_DIR}/include")
   target_include_directories(gmock_main SYSTEM INTERFACE "${gmock_SOURCE_DIR}/include")
 endif()
 
 ########################################################################
 #
 # Install rules
 if(INSTALL_GMOCK)
   install(TARGETS gmock gmock_main
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
-  install(DIRECTORY ${gmock_SOURCE_DIR}/include/gmock
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
+    LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}")
+  install(DIRECTORY "${gmock_SOURCE_DIR}/include/gmock"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
 
   # configure and install pkgconfig files
   configure_file(
     cmake/gmock.pc.in
     "${CMAKE_BINARY_DIR}/gmock.pc"
     @ONLY)
   configure_file(
     cmake/gmock_main.pc.in
     "${CMAKE_BINARY_DIR}/gmock_main.pc"
     @ONLY)
   install(FILES "${CMAKE_BINARY_DIR}/gmock.pc" "${CMAKE_BINARY_DIR}/gmock_main.pc"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 endif()
 
 ########################################################################
 #
 # Google Mock's own tests.
 #
 # You can skip this section if you aren't interested in testing
 # Google Mock itself.
 #
 # The tests are not built by default.  To build them, set the
 # gmock_build_tests option to ON.  You can do it by running ccmake
 # or specifying the -Dgmock_build_tests=ON flag when running cmake.
 
 if (gmock_build_tests)
   # This must be set in the root directory for the tests to be run by
   # 'make test' or ctest.
   enable_testing()
 
   ############################################################
   # C++ tests built with standard compiler flags.
 
   cxx_test(gmock-actions_test gmock_main)
   cxx_test(gmock-cardinalities_test gmock_main)
   cxx_test(gmock_ex_test gmock_main)
   cxx_test(gmock-generated-actions_test gmock_main)
   cxx_test(gmock-generated-function-mockers_test gmock_main)
   cxx_test(gmock-generated-internal-utils_test gmock_main)
   cxx_test(gmock-generated-matchers_test gmock_main)
   cxx_test(gmock-internal-utils_test gmock_main)
   cxx_test(gmock-matchers_test gmock_main)
   cxx_test(gmock-more-actions_test gmock_main)
   cxx_test(gmock-nice-strict_test gmock_main)
   cxx_test(gmock-port_test gmock_main)
   cxx_test(gmock-spec-builders_test gmock_main)
   cxx_test(gmock_link_test gmock_main test/gmock_link2_test.cc)
   cxx_test(gmock_test gmock_main)
 
   if (DEFINED GTEST_HAS_PTHREAD)
     cxx_test(gmock_stress_test gmock)
   endif()
 
   # gmock_all_test is commented to save time building and running tests.
   # Uncomment if necessary.
   # cxx_test(gmock_all_test gmock_main)
 
   ############################################################
   # C++ tests built with non-standard compiler flags.
 
   cxx_library(gmock_main_no_exception "${cxx_no_exception}"
     "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
 
   cxx_library(gmock_main_no_rtti "${cxx_no_rtti}"
     "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
 
   if (NOT MSVC OR MSVC_VERSION LESS 1600)  # 1600 is Visual Studio 2010.
     # Visual Studio 2010, 2012, and 2013 define symbols in std::tr1 that
     # conflict with our own definitions. Therefore using our own tuple does not
     # work on those compilers.
     cxx_library(gmock_main_use_own_tuple "${cxx_use_own_tuple}"
       "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
 
     cxx_test_with_flags(gmock_use_own_tuple_test "${cxx_use_own_tuple}"
       gmock_main_use_own_tuple test/gmock-spec-builders_test.cc)
   endif()
 
   cxx_test_with_flags(gmock-more-actions_no_exception_test "${cxx_no_exception}"
     gmock_main_no_exception test/gmock-more-actions_test.cc)
 
   cxx_test_with_flags(gmock_no_rtti_test "${cxx_no_rtti}"
     gmock_main_no_rtti test/gmock-spec-builders_test.cc)
 
   cxx_shared_library(shared_gmock_main "${cxx_default}"
     "${gtest_dir}/src/gtest-all.cc" src/gmock-all.cc src/gmock_main.cc)
 
   # Tests that a binary can be built with Google Mock as a shared library.  On
   # some system configurations, it may not possible to run the binary without
   # knowing more details about the system configurations. We do not try to run
   # this binary. To get a more robust shared library coverage, configure with
   # -DBUILD_SHARED_LIBS=ON.
   cxx_executable_with_flags(shared_gmock_test_ "${cxx_default}"
     shared_gmock_main test/gmock-spec-builders_test.cc)
   set_target_properties(shared_gmock_test_
     PROPERTIES
     COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
 
   ############################################################
   # Python tests.
 
   cxx_executable(gmock_leak_test_ test gmock_main)
   py_test(gmock_leak_test)
 
   cxx_executable(gmock_output_test_ test gmock)
   py_test(gmock_output_test)
 endif()
diff --git a/googletest/CMakeLists.txt b/googletest/CMakeLists.txt
index 3b907fd7..77b55cae 100644
--- a/googletest/CMakeLists.txt
+++ b/googletest/CMakeLists.txt
@@ -1,312 +1,312 @@
 ########################################################################
 # CMake build script for Google Test.
 #
 # To run the tests for Google Test itself on Linux, use 'make test' or
 # ctest.  You can select which tests to run using 'ctest -R regex'.
 # For more options, run 'ctest --help'.
 
 # BUILD_SHARED_LIBS is a standard CMake variable, but we declare it here to
 # make it prominent in the GUI.
 option(BUILD_SHARED_LIBS "Build shared libraries (DLLs)." OFF)
 
 # When other libraries are using a shared version of runtime libraries,
 # Google Test also has to use one.
 option(
   gtest_force_shared_crt
   "Use shared (DLL) run-time lib even when Google Test is built as static lib."
   OFF)
 
 option(gtest_build_tests "Build all of gtest's own tests." OFF)
 
 option(gtest_build_samples "Build gtest's sample programs." OFF)
 
 option(gtest_disable_pthreads "Disable uses of pthreads in gtest." OFF)
 
 option(
   gtest_hide_internal_symbols
   "Build gtest with internal symbols hidden in shared libraries."
   OFF)
 
 set(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "Generate debug library name with a postfix.")
 
 # Defines pre_project_set_up_hermetic_build() and set_up_hermetic_build().
 include(cmake/hermetic_build.cmake OPTIONAL)
 
 if (COMMAND pre_project_set_up_hermetic_build)
   pre_project_set_up_hermetic_build()
 endif()
 
 ########################################################################
 #
 # Project-wide settings
 
 # Name of the project.
 #
 # CMake files in this project can refer to the root source directory
 # as ${gtest_SOURCE_DIR} and to the root binary directory as
 # ${gtest_BINARY_DIR}.
 # Language "C" is required for find_package(Threads).
 if (CMAKE_VERSION VERSION_LESS 3.0)
   project(gtest CXX C)
 else()
   cmake_policy(SET CMP0048 NEW)
   project(gtest VERSION 1.9.0 LANGUAGES CXX C)
 endif()
 cmake_minimum_required(VERSION 2.6.4)
 
 if (POLICY CMP0063) # Visibility
   cmake_policy(SET CMP0063 NEW)
 endif (POLICY CMP0063)
 
 if (COMMAND set_up_hermetic_build)
   set_up_hermetic_build()
 endif()
 
 if (gtest_hide_internal_symbols)
   set(CMAKE_CXX_VISIBILITY_PRESET hidden)
   set(CMAKE_VISIBILITY_INLINES_HIDDEN 1)
 endif()
 
 # Define helper functions and macros used by Google Test.
 include(cmake/internal_utils.cmake)
 
 config_compiler_and_linker()  # Defined in internal_utils.cmake.
 
 # Where Google Test's .h files can be found.
 include_directories(
-  ${gtest_SOURCE_DIR}/include
-  ${gtest_SOURCE_DIR})
+  "${gtest_SOURCE_DIR}/include"
+  "${gtest_SOURCE_DIR}")
 
 # Summary of tuple support for Microsoft Visual Studio:
 # Compiler    version(MS)  version(cmake)  Support
 # ----------  -----------  --------------  -----------------------------
 # <= VS 2010  <= 10        <= 1600         Use Google Tests's own tuple.
 # VS 2012     11           1700            std::tr1::tuple + _VARIADIC_MAX=10
 # VS 2013     12           1800            std::tr1::tuple
 # VS 2015     14           1900            std::tuple
 # VS 2017     15           >= 1910         std::tuple
 if (MSVC AND MSVC_VERSION EQUAL 1700)
   add_definitions(/D _VARIADIC_MAX=10)
 endif()
-
+ 
 ########################################################################
 #
 # Defines the gtest & gtest_main libraries.  User tests should link
 # with one of them.
 
 # Google Test libraries.  We build them using more strict warnings than what
 # are used for other targets, to ensure that gtest can be compiled by a user
 # aggressive about warnings.
 cxx_library(gtest "${cxx_strict}" src/gtest-all.cc)
 cxx_library(gtest_main "${cxx_strict}" src/gtest_main.cc)
 target_link_libraries(gtest_main gtest)
 
 # If the CMake version supports it, attach header directory information
 # to the targets for when we are part of a parent build (ie being pulled
 # in via add_subdirectory() rather than being a standalone build).
 if (DEFINED CMAKE_VERSION AND NOT "${CMAKE_VERSION}" VERSION_LESS "2.8.11")
   target_include_directories(gtest      SYSTEM INTERFACE "${gtest_SOURCE_DIR}/include")
   target_include_directories(gtest_main SYSTEM INTERFACE "${gtest_SOURCE_DIR}/include")
 endif()
 
 ########################################################################
 #
 # Install rules
 if(INSTALL_GTEST)
   install(TARGETS gtest gtest_main
-    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-    ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR})
-  install(DIRECTORY ${gtest_SOURCE_DIR}/include/gtest
-    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
+    RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
+    ARCHIVE DESTINATION "${CMAKE_INSTALL_LIBDIR}"
+    LIBRARY DESTINATION "${CMAKE_INSTALL_LIBDIR}")
+  install(DIRECTORY "${gtest_SOURCE_DIR}/include/gtest"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
 
   # configure and install pkgconfig files
   configure_file(
     cmake/gtest.pc.in
     "${CMAKE_BINARY_DIR}/gtest.pc"
     @ONLY)
   configure_file(
     cmake/gtest_main.pc.in
     "${CMAKE_BINARY_DIR}/gtest_main.pc"
     @ONLY)
   install(FILES "${CMAKE_BINARY_DIR}/gtest.pc" "${CMAKE_BINARY_DIR}/gtest_main.pc"
     DESTINATION "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
 endif()
 
 ########################################################################
 #
 # Samples on how to link user tests with gtest or gtest_main.
 #
 # They are not built by default.  To build them, set the
 # gtest_build_samples option to ON.  You can do it by running ccmake
 # or specifying the -Dgtest_build_samples=ON flag when running cmake.
 
 if (gtest_build_samples)
   cxx_executable(sample1_unittest samples gtest_main samples/sample1.cc)
   cxx_executable(sample2_unittest samples gtest_main samples/sample2.cc)
   cxx_executable(sample3_unittest samples gtest_main)
   cxx_executable(sample4_unittest samples gtest_main samples/sample4.cc)
   cxx_executable(sample5_unittest samples gtest_main samples/sample1.cc)
   cxx_executable(sample6_unittest samples gtest_main)
   cxx_executable(sample7_unittest samples gtest_main)
   cxx_executable(sample8_unittest samples gtest_main)
   cxx_executable(sample9_unittest samples gtest)
   cxx_executable(sample10_unittest samples gtest)
 endif()
 
 ########################################################################
 #
 # Google Test's own tests.
 #
 # You can skip this section if you aren't interested in testing
 # Google Test itself.
 #
 # The tests are not built by default.  To build them, set the
 # gtest_build_tests option to ON.  You can do it by running ccmake
 # or specifying the -Dgtest_build_tests=ON flag when running cmake.
 
 if (gtest_build_tests)
   # This must be set in the root directory for the tests to be run by
   # 'make test' or ctest.
   enable_testing()
 
   ############################################################
   # C++ tests built with standard compiler flags.
 
   cxx_test(gtest-death-test_test gtest_main)
   cxx_test(gtest_environment_test gtest)
   cxx_test(gtest-filepath_test gtest_main)
   cxx_test(gtest-linked_ptr_test gtest_main)
   cxx_test(gtest-listener_test gtest_main)
   cxx_test(gtest_main_unittest gtest_main)
   cxx_test(gtest-message_test gtest_main)
   cxx_test(gtest_no_test_unittest gtest)
   cxx_test(gtest-options_test gtest_main)
   cxx_test(gtest-param-test_test gtest
     test/gtest-param-test2_test.cc)
   cxx_test(gtest-port_test gtest_main)
   cxx_test(gtest_pred_impl_unittest gtest_main)
   cxx_test(gtest_premature_exit_test gtest
     test/gtest_premature_exit_test.cc)
   cxx_test(gtest-printers_test gtest_main)
   cxx_test(gtest_prod_test gtest_main
     test/production.cc)
   cxx_test(gtest_repeat_test gtest)
   cxx_test(gtest_sole_header_test gtest_main)
   cxx_test(gtest_stress_test gtest)
   cxx_test(gtest-test-part_test gtest_main)
   cxx_test(gtest_throw_on_failure_ex_test gtest)
   cxx_test(gtest-typed-test_test gtest_main
     test/gtest-typed-test2_test.cc)
   cxx_test(gtest_unittest gtest_main)
   cxx_test(gtest-unittest-api_test gtest)
 
   ############################################################
   # C++ tests built with non-standard compiler flags.
 
   # MSVC 7.1 does not support STL with exceptions disabled.
   if (NOT MSVC OR MSVC_VERSION GREATER 1310)
     cxx_library(gtest_no_exception "${cxx_no_exception}"
       src/gtest-all.cc)
     cxx_library(gtest_main_no_exception "${cxx_no_exception}"
       src/gtest-all.cc src/gtest_main.cc)
   endif()
   cxx_library(gtest_main_no_rtti "${cxx_no_rtti}"
     src/gtest-all.cc src/gtest_main.cc)
 
   cxx_test_with_flags(gtest-death-test_ex_nocatch_test
     "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=0"
     gtest test/gtest-death-test_ex_test.cc)
   cxx_test_with_flags(gtest-death-test_ex_catch_test
     "${cxx_exception} -DGTEST_ENABLE_CATCH_EXCEPTIONS_=1"
     gtest test/gtest-death-test_ex_test.cc)
 
   cxx_test_with_flags(gtest_no_rtti_unittest "${cxx_no_rtti}"
     gtest_main_no_rtti test/gtest_unittest.cc)
 
   cxx_shared_library(gtest_dll "${cxx_default}"
     src/gtest-all.cc src/gtest_main.cc)
 
   cxx_executable_with_flags(gtest_dll_test_ "${cxx_default}"
     gtest_dll test/gtest_all_test.cc)
   set_target_properties(gtest_dll_test_
                         PROPERTIES
                         COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
 
   if (NOT MSVC OR MSVC_VERSION LESS 1600)  # 1600 is Visual Studio 2010.
     # Visual Studio 2010, 2012, and 2013 define symbols in std::tr1 that
     # conflict with our own definitions. Therefore using our own tuple does not
     # work on those compilers.
     cxx_library(gtest_main_use_own_tuple "${cxx_use_own_tuple}"
       src/gtest-all.cc src/gtest_main.cc)
 
     cxx_test_with_flags(gtest-tuple_test "${cxx_use_own_tuple}"
       gtest_main_use_own_tuple test/gtest-tuple_test.cc)
 
     cxx_test_with_flags(gtest_use_own_tuple_test "${cxx_use_own_tuple}"
       gtest_main_use_own_tuple
       test/gtest-param-test_test.cc test/gtest-param-test2_test.cc)
   endif()
 
   ############################################################
   # Python tests.
 
   cxx_executable(gtest_break_on_failure_unittest_ test gtest)
   py_test(gtest_break_on_failure_unittest)
 
   # Visual Studio .NET 2003 does not support STL with exceptions disabled.
   if (NOT MSVC OR MSVC_VERSION GREATER 1310)  # 1310 is Visual Studio .NET 2003
     cxx_executable_with_flags(
       gtest_catch_exceptions_no_ex_test_
       "${cxx_no_exception}"
       gtest_main_no_exception
       test/gtest_catch_exceptions_test_.cc)
   endif()
 
   cxx_executable_with_flags(
     gtest_catch_exceptions_ex_test_
     "${cxx_exception}"
     gtest_main
     test/gtest_catch_exceptions_test_.cc)
   py_test(gtest_catch_exceptions_test)
 
   cxx_executable(gtest_color_test_ test gtest)
   py_test(gtest_color_test)
 
   cxx_executable(gtest_env_var_test_ test gtest)
   py_test(gtest_env_var_test)
 
   cxx_executable(gtest_filter_unittest_ test gtest)
   py_test(gtest_filter_unittest)
 
   cxx_executable(gtest_help_test_ test gtest_main)
   py_test(gtest_help_test)
 
   cxx_executable(gtest_list_tests_unittest_ test gtest)
   py_test(gtest_list_tests_unittest)
 
   cxx_executable(gtest_output_test_ test gtest)
   py_test(gtest_output_test)
 
   cxx_executable(gtest_shuffle_test_ test gtest)
   py_test(gtest_shuffle_test)
 
   # MSVC 7.1 does not support STL with exceptions disabled.
   if (NOT MSVC OR MSVC_VERSION GREATER 1310)
     cxx_executable(gtest_throw_on_failure_test_ test gtest_no_exception)
     set_target_properties(gtest_throw_on_failure_test_
       PROPERTIES
       COMPILE_FLAGS "${cxx_no_exception}")
     py_test(gtest_throw_on_failure_test)
   endif()
 
   cxx_executable(gtest_uninitialized_test_ test gtest)
   py_test(gtest_uninitialized_test)
 
   cxx_executable(gtest_xml_outfile1_test_ test gtest_main)
   cxx_executable(gtest_xml_outfile2_test_ test gtest_main)
   py_test(gtest_xml_outfiles_test)
 
   cxx_executable(gtest_xml_output_unittest_ test gtest)
   py_test(gtest_xml_output_unittest)
 endif()
diff --git a/googletest/include/gtest/gtest.h b/googletest/include/gtest/gtest.h
index 1b55677a..a19625f3 100644
--- a/googletest/include/gtest/gtest.h
+++ b/googletest/include/gtest/gtest.h
@@ -1,2236 +1,2234 @@
 // Copyright 2005, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
 // distribution.
 //     * Neither the name of Google Inc. nor the names of its
 // contributors may be used to endorse or promote products derived from
 // this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 //
 // Author: wan@google.com (Zhanyong Wan)
 //
 // The Google C++ Testing Framework (Google Test)
 //
 // This header file defines the public API for Google Test.  It should be
 // included by any test program that uses Google Test.
 //
 // IMPORTANT NOTE: Due to limitation of the C++ language, we have to
 // leave some internal implementation details in this header file.
 // They are clearly marked by comments like this:
 //
 //   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 //
 // Such code is NOT meant to be used by a user directly, and is subject
 // to CHANGE WITHOUT NOTICE.  Therefore DO NOT DEPEND ON IT in a user
 // program!
 //
 // Acknowledgment: Google Test borrowed the idea of automatic test
 // registration from Barthelemy Dagenais' (barthelemy@prologique.com)
 // easyUnit framework.
 
 #ifndef GTEST_INCLUDE_GTEST_GTEST_H_
 #define GTEST_INCLUDE_GTEST_GTEST_H_
 
 #include <limits>
 #include <ostream>
 #include <vector>
 
 #include "gtest/internal/gtest-internal.h"
 #include "gtest/internal/gtest-string.h"
 #include "gtest/gtest-death-test.h"
 #include "gtest/gtest-message.h"
 #include "gtest/gtest-param-test.h"
 #include "gtest/gtest-printers.h"
 #include "gtest/gtest_prod.h"
 #include "gtest/gtest-test-part.h"
 #include "gtest/gtest-typed-test.h"
 
 // Depending on the platform, different string classes are available.
 // On Linux, in addition to ::std::string, Google also makes use of
 // class ::string, which has the same interface as ::std::string, but
 // has a different implementation.
 //
 // You can define GTEST_HAS_GLOBAL_STRING to 1 to indicate that
 // ::string is available AND is a distinct type to ::std::string, or
 // define it to 0 to indicate otherwise.
 //
 // If ::std::string and ::string are the same class on your platform
 // due to aliasing, you should define GTEST_HAS_GLOBAL_STRING to 0.
 //
 // If you do not define GTEST_HAS_GLOBAL_STRING, it is defined
 // heuristically.
 
 namespace testing {
 
 // Declares the flags.
 
 // This flag temporary enables the disabled tests.
 GTEST_DECLARE_bool_(also_run_disabled_tests);
 
 // This flag brings the debugger on an assertion failure.
 GTEST_DECLARE_bool_(break_on_failure);
 
 // This flag controls whether Google Test catches all test-thrown exceptions
 // and logs them as failures.
 GTEST_DECLARE_bool_(catch_exceptions);
 
 // This flag enables using colors in terminal output. Available values are
 // "yes" to enable colors, "no" (disable colors), or "auto" (the default)
 // to let Google Test decide.
 GTEST_DECLARE_string_(color);
 
 // This flag sets up the filter to select by name using a glob pattern
 // the tests to run. If the filter is not given all tests are executed.
 GTEST_DECLARE_string_(filter);
 
 // This flag causes the Google Test to list tests. None of the tests listed
 // are actually run if the flag is provided.
 GTEST_DECLARE_bool_(list_tests);
 
 // This flag controls whether Google Test emits a detailed XML report to a file
 // in addition to its normal textual output.
 GTEST_DECLARE_string_(output);
 
 // This flags control whether Google Test prints the elapsed time for each
 // test.
 GTEST_DECLARE_bool_(print_time);
 
 // This flag specifies the random number seed.
 GTEST_DECLARE_int32_(random_seed);
 
 // This flag sets how many times the tests are repeated. The default value
 // is 1. If the value is -1 the tests are repeating forever.
 GTEST_DECLARE_int32_(repeat);
 
 // This flag controls whether Google Test includes Google Test internal
 // stack frames in failure stack traces.
 GTEST_DECLARE_bool_(show_internal_stack_frames);
 
 // When this flag is specified, tests' order is randomized on every iteration.
 GTEST_DECLARE_bool_(shuffle);
 
 // This flag specifies the maximum number of stack frames to be
 // printed in a failure message.
 GTEST_DECLARE_int32_(stack_trace_depth);
 
 // When this flag is specified, a failed assertion will throw an
 // exception if exceptions are enabled, or exit the program with a
 // non-zero code otherwise.
 GTEST_DECLARE_bool_(throw_on_failure);
 
 // When this flag is set with a "host:port" string, on supported
 // platforms test results are streamed to the specified port on
 // the specified host machine.
 GTEST_DECLARE_string_(stream_result_to);
 
 // The upper limit for valid stack trace depths.
 const int kMaxStackTraceDepth = 100;
 
 namespace internal {
 
 class AssertHelper;
 class DefaultGlobalTestPartResultReporter;
 class ExecDeathTest;
 class NoExecDeathTest;
 class FinalSuccessChecker;
 class GTestFlagSaver;
 class StreamingListenerTest;
 class TestResultAccessor;
 class TestEventListenersAccessor;
 class TestEventRepeater;
 class UnitTestRecordPropertyTestHelper;
 class WindowsDeathTest;
 class UnitTestImpl* GetUnitTestImpl();
 void ReportFailureInUnknownLocation(TestPartResult::Type result_type,
                                     const std::string& message);
 
 }  // namespace internal
 
 // The friend relationship of some of these classes is cyclic.
 // If we don't forward declare them the compiler might confuse the classes
 // in friendship clauses with same named classes on the scope.
 class Test;
 class TestCase;
 class TestInfo;
 class UnitTest;
 
 // A class for indicating whether an assertion was successful.  When
 // the assertion wasn't successful, the AssertionResult object
 // remembers a non-empty message that describes how it failed.
 //
 // To create an instance of this class, use one of the factory functions
 // (AssertionSuccess() and AssertionFailure()).
 //
 // This class is useful for two purposes:
 //   1. Defining predicate functions to be used with Boolean test assertions
 //      EXPECT_TRUE/EXPECT_FALSE and their ASSERT_ counterparts
 //   2. Defining predicate-format functions to be
 //      used with predicate assertions (ASSERT_PRED_FORMAT*, etc).
 //
 // For example, if you define IsEven predicate:
 //
 //   testing::AssertionResult IsEven(int n) {
 //     if ((n % 2) == 0)
 //       return testing::AssertionSuccess();
 //     else
 //       return testing::AssertionFailure() << n << " is odd";
 //   }
 //
 // Then the failed expectation EXPECT_TRUE(IsEven(Fib(5)))
 // will print the message
 //
 //   Value of: IsEven(Fib(5))
 //     Actual: false (5 is odd)
 //   Expected: true
 //
 // instead of a more opaque
 //
 //   Value of: IsEven(Fib(5))
 //     Actual: false
 //   Expected: true
 //
 // in case IsEven is a simple Boolean predicate.
 //
 // If you expect your predicate to be reused and want to support informative
 // messages in EXPECT_FALSE and ASSERT_FALSE (negative assertions show up
 // about half as often as positive ones in our tests), supply messages for
 // both success and failure cases:
 //
 //   testing::AssertionResult IsEven(int n) {
 //     if ((n % 2) == 0)
 //       return testing::AssertionSuccess() << n << " is even";
 //     else
 //       return testing::AssertionFailure() << n << " is odd";
 //   }
 //
 // Then a statement EXPECT_FALSE(IsEven(Fib(6))) will print
 //
 //   Value of: IsEven(Fib(6))
 //     Actual: true (8 is even)
 //   Expected: false
 //
 // NB: Predicates that support negative Boolean assertions have reduced
 // performance in positive ones so be careful not to use them in tests
 // that have lots (tens of thousands) of positive Boolean assertions.
 //
 // To use this class with EXPECT_PRED_FORMAT assertions such as:
 //
 //   // Verifies that Foo() returns an even number.
 //   EXPECT_PRED_FORMAT1(IsEven, Foo());
 //
 // you need to define:
 //
 //   testing::AssertionResult IsEven(const char* expr, int n) {
 //     if ((n % 2) == 0)
 //       return testing::AssertionSuccess();
 //     else
 //       return testing::AssertionFailure()
 //         << "Expected: " << expr << " is even\n  Actual: it's " << n;
 //   }
 //
 // If Foo() returns 5, you will see the following message:
 //
 //   Expected: Foo() is even
 //     Actual: it's 5
 //
 class GTEST_API_ AssertionResult {
  public:
   // Copy constructor.
   // Used in EXPECT_TRUE/FALSE(assertion_result).
   AssertionResult(const AssertionResult& other);
 
   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 /* forcing value to bool */)
 
   // Used in the EXPECT_TRUE/FALSE(bool_expression).
   //
   // T must be contextually convertible to bool.
   //
   // The second parameter prevents this overload from being considered if
   // the argument is implicitly convertible to AssertionResult. In that case
   // we want AssertionResult's copy constructor to be used.
   template <typename T>
   explicit AssertionResult(
       const T& success,
       typename internal::EnableIf<
           !internal::ImplicitlyConvertible<T, AssertionResult>::value>::type*
           /*enabler*/ = NULL)
       : success_(success) {}
 
   GTEST_DISABLE_MSC_WARNINGS_POP_()
 
   // Assignment operator.
   AssertionResult& operator=(AssertionResult other) {
     swap(other);
     return *this;
   }
 
   // Returns true iff the assertion succeeded.
   operator bool() const { return success_; }  // NOLINT
 
   // Returns the assertion's negation. Used with EXPECT/ASSERT_FALSE.
   AssertionResult operator!() const;
 
   // Returns the text streamed into this AssertionResult. Test assertions
   // use it when they fail (i.e., the predicate's outcome doesn't match the
   // assertion's expectation). When nothing has been streamed into the
   // object, returns an empty string.
   const char* message() const {
     return message_.get() != NULL ?  message_->c_str() : "";
   }
   // TODO(vladl@google.com): Remove this after making sure no clients use it.
   // Deprecated; please use message() instead.
   const char* failure_message() const { return message(); }
 
   // Streams a custom failure message into this object.
   template <typename T> AssertionResult& operator<<(const T& value) {
     AppendMessage(Message() << value);
     return *this;
   }
 
   // Allows streaming basic output manipulators such as endl or flush into
   // this object.
   AssertionResult& operator<<(
       ::std::ostream& (*basic_manipulator)(::std::ostream& stream)) {
     AppendMessage(Message() << basic_manipulator);
     return *this;
   }
 
  private:
   // Appends the contents of message to message_.
   void AppendMessage(const Message& a_message) {
     if (message_.get() == NULL)
       message_.reset(new ::std::string);
     message_->append(a_message.GetString().c_str());
   }
 
   // Swap the contents of this AssertionResult with other.
   void swap(AssertionResult& other);
 
   // Stores result of the assertion predicate.
   bool success_;
   // Stores the message describing the condition in case the expectation
   // construct is not satisfied with the predicate's outcome.
   // Referenced via a pointer to avoid taking too much stack frame space
   // with test assertions.
   internal::scoped_ptr< ::std::string> message_;
 };
 
 // Makes a successful assertion result.
 GTEST_API_ AssertionResult AssertionSuccess();
 
 // Makes a failed assertion result.
 GTEST_API_ AssertionResult AssertionFailure();
 
 // Makes a failed assertion result with the given failure message.
 // Deprecated; use AssertionFailure() << msg.
 GTEST_API_ AssertionResult AssertionFailure(const Message& msg);
 
 // The abstract class that all tests inherit from.
 //
 // In Google Test, a unit test program contains one or many TestCases, and
 // each TestCase contains one or many Tests.
 //
 // When you define a test using the TEST macro, you don't need to
 // explicitly derive from Test - the TEST macro automatically does
 // this for you.
 //
 // The only time you derive from Test is when defining a test fixture
 // to be used a TEST_F.  For example:
 //
 //   class FooTest : public testing::Test {
 //    protected:
 //     void SetUp() override { ... }
 //     void TearDown() override { ... }
 //     ...
 //   };
 //
 //   TEST_F(FooTest, Bar) { ... }
 //   TEST_F(FooTest, Baz) { ... }
 //
 // Test is not copyable.
 class GTEST_API_ Test {
  public:
   friend class TestInfo;
 
   // Defines types for pointers to functions that set up and tear down
   // a test case.
   typedef internal::SetUpTestCaseFunc SetUpTestCaseFunc;
   typedef internal::TearDownTestCaseFunc TearDownTestCaseFunc;
 
   // The d'tor is virtual as we intend to inherit from Test.
   virtual ~Test();
 
   // Sets up the stuff shared by all tests in this test case.
   //
   // Google Test will call Foo::SetUpTestCase() before running the first
   // test in test case Foo.  Hence a sub-class can define its own
   // SetUpTestCase() method to shadow the one defined in the super
   // class.
   static void SetUpTestCase() {}
 
   // Tears down the stuff shared by all tests in this test case.
   //
   // Google Test will call Foo::TearDownTestCase() after running the last
   // test in test case Foo.  Hence a sub-class can define its own
   // TearDownTestCase() method to shadow the one defined in the super
   // class.
   static void TearDownTestCase() {}
 
   // Returns true iff the current test has a fatal failure.
   static bool HasFatalFailure();
 
   // Returns true iff the current test has a non-fatal failure.
   static bool HasNonfatalFailure();
 
   // Returns true iff the current test has a (either fatal or
   // non-fatal) failure.
   static bool HasFailure() { return HasFatalFailure() || HasNonfatalFailure(); }
 
   // Logs a property for the current test, test case, or for the entire
   // invocation of the test program when used outside of the context of a
   // test case.  Only the last value for a given key is remembered.  These
   // are public static so they can be called from utility functions that are
   // not members of the test fixture.  Calls to RecordProperty made during
   // lifespan of the test (from the moment its constructor starts to the
   // moment its destructor finishes) will be output in XML as attributes of
   // the <testcase> element.  Properties recorded from fixture's
   // SetUpTestCase or TearDownTestCase are logged as attributes of the
   // corresponding <testsuite> element.  Calls to RecordProperty made in the
   // global context (before or after invocation of RUN_ALL_TESTS and from
   // SetUp/TearDown method of Environment objects registered with Google
   // Test) will be output as attributes of the <testsuites> element.
   static void RecordProperty(const std::string& key, const std::string& value);
   static void RecordProperty(const std::string& key, int value);
 
  protected:
   // Creates a Test object.
   Test();
 
   // Sets up the test fixture.
   virtual void SetUp();
 
   // Tears down the test fixture.
   virtual void TearDown();
 
  private:
   // Returns true iff the current test has the same fixture class as
   // the first test in the current test case.
   static bool HasSameFixtureClass();
 
   // Runs the test after the test fixture has been set up.
   //
   // A sub-class must implement this to define the test logic.
   //
   // DO NOT OVERRIDE THIS FUNCTION DIRECTLY IN A USER PROGRAM.
   // Instead, use the TEST or TEST_F macro.
   virtual void TestBody() = 0;
 
   // Sets up, executes, and tears down the test.
   void Run();
 
   // Deletes self.  We deliberately pick an unusual name for this
   // internal method to avoid clashing with names used in user TESTs.
   void DeleteSelf_() { delete this; }
 
   const internal::scoped_ptr< GTEST_FLAG_SAVER_ > gtest_flag_saver_;
 
   // Often a user misspells SetUp() as Setup() and spends a long time
   // wondering why it is never called by Google Test.  The declaration of
   // the following method is solely for catching such an error at
   // compile time:
   //
   //   - The return type is deliberately chosen to be not void, so it
   //   will be a conflict if void Setup() is declared in the user's
   //   test fixture.
   //
   //   - This method is private, so it will be another compiler error
   //   if the method is called from the user's test fixture.
   //
   // DO NOT OVERRIDE THIS FUNCTION.
   //
   // If you see an error about overriding the following function or
   // about it being private, you have mis-spelled SetUp() as Setup().
   struct Setup_should_be_spelled_SetUp {};
   virtual Setup_should_be_spelled_SetUp* Setup() { return NULL; }
 
   // We disallow copying Tests.
   GTEST_DISALLOW_COPY_AND_ASSIGN_(Test);
 };
 
 typedef internal::TimeInMillis TimeInMillis;
 
 // A copyable object representing a user specified test property which can be
 // output as a key/value string pair.
 //
 // Don't inherit from TestProperty as its destructor is not virtual.
 class TestProperty {
  public:
   // C'tor.  TestProperty does NOT have a default constructor.
   // Always use this constructor (with parameters) to create a
   // TestProperty object.
   TestProperty(const std::string& a_key, const std::string& a_value) :
     key_(a_key), value_(a_value) {
   }
 
   // Gets the user supplied key.
   const char* key() const {
     return key_.c_str();
   }
 
   // Gets the user supplied value.
   const char* value() const {
     return value_.c_str();
   }
 
   // Sets a new value, overriding the one supplied in the constructor.
   void SetValue(const std::string& new_value) {
     value_ = new_value;
   }
 
  private:
   // The key supplied by the user.
   std::string key_;
   // The value supplied by the user.
   std::string value_;
 };
 
 // The result of a single Test.  This includes a list of
 // TestPartResults, a list of TestProperties, a count of how many
 // death tests there are in the Test, and how much time it took to run
 // the Test.
 //
 // TestResult is not copyable.
 class GTEST_API_ TestResult {
  public:
   // Creates an empty TestResult.
   TestResult();
 
   // D'tor.  Do not inherit from TestResult.
   ~TestResult();
 
   // Gets the number of all test parts.  This is the sum of the number
   // of successful test parts and the number of failed test parts.
   int total_part_count() const;
 
   // Returns the number of the test properties.
   int test_property_count() const;
 
   // Returns true iff the test passed (i.e. no test part failed).
   bool Passed() const { return !Failed(); }
 
   // Returns true iff the test failed.
   bool Failed() const;
 
   // Returns true iff the test fatally failed.
   bool HasFatalFailure() const;
 
   // Returns true iff the test has a non-fatal failure.
   bool HasNonfatalFailure() const;
 
   // Returns the elapsed time, in milliseconds.
   TimeInMillis elapsed_time() const { return elapsed_time_; }
 
   // Returns the i-th test part result among all the results. i can range
   // from 0 to test_property_count() - 1. If i is not in that range, aborts
   // the program.
   const TestPartResult& GetTestPartResult(int i) const;
 
   // Returns the i-th test property. i can range from 0 to
   // test_property_count() - 1. If i is not in that range, aborts the
   // program.
   const TestProperty& GetTestProperty(int i) const;
 
  private:
   friend class TestInfo;
   friend class TestCase;
   friend class UnitTest;
   friend class internal::DefaultGlobalTestPartResultReporter;
   friend class internal::ExecDeathTest;
   friend class internal::TestResultAccessor;
   friend class internal::UnitTestImpl;
   friend class internal::WindowsDeathTest;
 
   // Gets the vector of TestPartResults.
   const std::vector<TestPartResult>& test_part_results() const {
     return test_part_results_;
   }
 
   // Gets the vector of TestProperties.
   const std::vector<TestProperty>& test_properties() const {
     return test_properties_;
   }
 
   // Sets the elapsed time.
   void set_elapsed_time(TimeInMillis elapsed) { elapsed_time_ = elapsed; }
 
   // Adds a test property to the list. The property is validated and may add
   // a non-fatal failure if invalid (e.g., if it conflicts with reserved
   // key names). If a property is already recorded for the same key, the
   // value will be updated, rather than storing multiple values for the same
   // key.  xml_element specifies the element for which the property is being
   // recorded and is used for validation.
   void RecordProperty(const std::string& xml_element,
                       const TestProperty& test_property);
 
   // Adds a failure if the key is a reserved attribute of Google Test
   // testcase tags.  Returns true if the property is valid.
   // TODO(russr): Validate attribute names are legal and human readable.
   static bool ValidateTestProperty(const std::string& xml_element,
                                    const TestProperty& test_property);
 
   // Adds a test part result to the list.
   void AddTestPartResult(const TestPartResult& test_part_result);
 
   // Returns the death test count.
   int death_test_count() const { return death_test_count_; }
 
   // Increments the death test count, returning the new count.
   int increment_death_test_count() { return ++death_test_count_; }
 
   // Clears the test part results.
   void ClearTestPartResults();
 
   // Clears the object.
   void Clear();
 
   // Protects mutable state of the property vector and of owned
   // properties, whose values may be updated.
   internal::Mutex test_properites_mutex_;
 
   // The vector of TestPartResults
   std::vector<TestPartResult> test_part_results_;
   // The vector of TestProperties
   std::vector<TestProperty> test_properties_;
   // Running count of death tests.
   int death_test_count_;
   // The elapsed time, in milliseconds.
   TimeInMillis elapsed_time_;
 
   // We disallow copying TestResult.
   GTEST_DISALLOW_COPY_AND_ASSIGN_(TestResult);
 };  // class TestResult
 
 // A TestInfo object stores the following information about a test:
 //
 //   Test case name
 //   Test name
 //   Whether the test should be run
 //   A function pointer that creates the test object when invoked
 //   Test result
 //
 // The constructor of TestInfo registers itself with the UnitTest
 // singleton such that the RUN_ALL_TESTS() macro knows which tests to
 // run.
 class GTEST_API_ TestInfo {
  public:
   // Destructs a TestInfo object.  This function is not virtual, so
   // don't inherit from TestInfo.
   ~TestInfo();
 
   // Returns the test case name.
   const char* test_case_name() const { return test_case_name_.c_str(); }
 
   // Returns the test name.
   const char* name() const { return name_.c_str(); }
 
   // Returns the name of the parameter type, or NULL if this is not a typed
   // or a type-parameterized test.
   const char* type_param() const {
     if (type_param_.get() != NULL)
       return type_param_->c_str();
     return NULL;
   }
 
   // Returns the text representation of the value parameter, or NULL if this
   // is not a value-parameterized test.
   const char* value_param() const {
     if (value_param_.get() != NULL)
       return value_param_->c_str();
     return NULL;
   }
 
   // Returns the file name where this test is defined.
   const char* file() const { return location_.file.c_str(); }
 
   // Returns the line where this test is defined.
   int line() const { return location_.line; }
 
   // Returns true if this test should run, that is if the test is not
   // disabled (or it is disabled but the also_run_disabled_tests flag has
   // been specified) and its full name matches the user-specified filter.
   //
   // Google Test allows the user to filter the tests by their full names.
   // The full name of a test Bar in test case Foo is defined as
   // "Foo.Bar".  Only the tests that match the filter will run.
   //
   // A filter is a colon-separated list of glob (not regex) patterns,
   // optionally followed by a '-' and a colon-separated list of
   // negative patterns (tests to exclude).  A test is run if it
   // matches one of the positive patterns and does not match any of
   // the negative patterns.
   //
   // For example, *A*:Foo.* is a filter that matches any string that
   // contains the character 'A' or starts with "Foo.".
   bool should_run() const { return should_run_; }
 
   // Returns true iff this test will appear in the XML report.
   bool is_reportable() const {
     // For now, the XML report includes all tests matching the filter.
     // In the future, we may trim tests that are excluded because of
     // sharding.
     return matches_filter_;
   }
 
   // Returns the result of the test.
   const TestResult* result() const { return &result_; }
 
  private:
 #if GTEST_HAS_DEATH_TEST
   friend class internal::DefaultDeathTestFactory;
 #endif  // GTEST_HAS_DEATH_TEST
   friend class Test;
   friend class TestCase;
   friend class internal::UnitTestImpl;
   friend class internal::StreamingListenerTest;
   friend TestInfo* internal::MakeAndRegisterTestInfo(
       const char* test_case_name,
       const char* name,
       const char* type_param,
       const char* value_param,
       internal::CodeLocation code_location,
       internal::TypeId fixture_class_id,
       Test::SetUpTestCaseFunc set_up_tc,
       Test::TearDownTestCaseFunc tear_down_tc,
       internal::TestFactoryBase* factory);
 
   // Constructs a TestInfo object. The newly constructed instance assumes
   // ownership of the factory object.
   TestInfo(const std::string& test_case_name,
            const std::string& name,
            const char* a_type_param,   // NULL if not a type-parameterized test
            const char* a_value_param,  // NULL if not a value-parameterized test
            internal::CodeLocation a_code_location,
            internal::TypeId fixture_class_id,
            internal::TestFactoryBase* factory);
 
   // Increments the number of death tests encountered in this test so
   // far.
   int increment_death_test_count() {
     return result_.increment_death_test_count();
   }
 
   // Creates the test object, runs it, records its result, and then
   // deletes it.
   void Run();
 
   static void ClearTestResult(TestInfo* test_info) {
     test_info->result_.Clear();
   }
 
   // These fields are immutable properties of the test.
   const std::string test_case_name_;     // Test case name
   const std::string name_;               // Test name
   // Name of the parameter type, or NULL if this is not a typed or a
   // type-parameterized test.
   const internal::scoped_ptr<const ::std::string> type_param_;
   // Text representation of the value parameter, or NULL if this is not a
   // value-parameterized test.
   const internal::scoped_ptr<const ::std::string> value_param_;
   internal::CodeLocation location_;
   const internal::TypeId fixture_class_id_;   // ID of the test fixture class
   bool should_run_;                 // True iff this test should run
   bool is_disabled_;                // True iff this test is disabled
   bool matches_filter_;             // True if this test matches the
                                     // user-specified filter.
   internal::TestFactoryBase* const factory_;  // The factory that creates
                                               // the test object
 
   // This field is mutable and needs to be reset before running the
   // test for the second time.
   TestResult result_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(TestInfo);
 };
 
 // A test case, which consists of a vector of TestInfos.
 //
 // TestCase is not copyable.
 class GTEST_API_ TestCase {
  public:
   // Creates a TestCase with the given name.
   //
   // TestCase does NOT have a default constructor.  Always use this
   // constructor to create a TestCase object.
   //
   // Arguments:
   //
   //   name:         name of the test case
   //   a_type_param: the name of the test's type parameter, or NULL if
   //                 this is not a type-parameterized test.
   //   set_up_tc:    pointer to the function that sets up the test case
   //   tear_down_tc: pointer to the function that tears down the test case
   TestCase(const char* name, const char* a_type_param,
            Test::SetUpTestCaseFunc set_up_tc,
            Test::TearDownTestCaseFunc tear_down_tc);
 
   // Destructor of TestCase.
   virtual ~TestCase();
 
   // Gets the name of the TestCase.
   const char* name() const { return name_.c_str(); }
 
   // Returns the name of the parameter type, or NULL if this is not a
   // type-parameterized test case.
   const char* type_param() const {
     if (type_param_.get() != NULL)
       return type_param_->c_str();
     return NULL;
   }
 
   // Returns true if any test in this test case should run.
   bool should_run() const { return should_run_; }
 
   // Gets the number of successful tests in this test case.
   int successful_test_count() const;
 
   // Gets the number of failed tests in this test case.
   int failed_test_count() const;
 
   // Gets the number of disabled tests that will be reported in the XML report.
   int reportable_disabled_test_count() const;
 
   // Gets the number of disabled tests in this test case.
   int disabled_test_count() const;
 
   // Gets the number of tests to be printed in the XML report.
   int reportable_test_count() const;
 
   // Get the number of tests in this test case that should run.
   int test_to_run_count() const;
 
   // Gets the number of all tests in this test case.
   int total_test_count() const;
 
   // Returns true iff the test case passed.
   bool Passed() const { return !Failed(); }
 
   // Returns true iff the test case failed.
   bool Failed() const { return failed_test_count() > 0; }
 
   // Returns the elapsed time, in milliseconds.
   TimeInMillis elapsed_time() const { return elapsed_time_; }
 
   // Returns the i-th test among all the tests. i can range from 0 to
   // total_test_count() - 1. If i is not in that range, returns NULL.
   const TestInfo* GetTestInfo(int i) const;
 
   // Returns the TestResult that holds test properties recorded during
   // execution of SetUpTestCase and TearDownTestCase.
   const TestResult& ad_hoc_test_result() const { return ad_hoc_test_result_; }
 
  private:
   friend class Test;
   friend class internal::UnitTestImpl;
 
   // Gets the (mutable) vector of TestInfos in this TestCase.
   std::vector<TestInfo*>& test_info_list() { return test_info_list_; }
 
   // Gets the (immutable) vector of TestInfos in this TestCase.
   const std::vector<TestInfo*>& test_info_list() const {
     return test_info_list_;
   }
 
   // Returns the i-th test among all the tests. i can range from 0 to
   // total_test_count() - 1. If i is not in that range, returns NULL.
   TestInfo* GetMutableTestInfo(int i);
 
   // Sets the should_run member.
   void set_should_run(bool should) { should_run_ = should; }
 
   // Adds a TestInfo to this test case.  Will delete the TestInfo upon
   // destruction of the TestCase object.
   void AddTestInfo(TestInfo * test_info);
 
   // Clears the results of all tests in this test case.
   void ClearResult();
 
   // Clears the results of all tests in the given test case.
   static void ClearTestCaseResult(TestCase* test_case) {
     test_case->ClearResult();
   }
 
   // Runs every test in this TestCase.
   void Run();
 
   // Runs SetUpTestCase() for this TestCase.  This wrapper is needed
   // for catching exceptions thrown from SetUpTestCase().
   void RunSetUpTestCase() { (*set_up_tc_)(); }
 
   // Runs TearDownTestCase() for this TestCase.  This wrapper is
   // needed for catching exceptions thrown from TearDownTestCase().
   void RunTearDownTestCase() { (*tear_down_tc_)(); }
 
   // Returns true iff test passed.
   static bool TestPassed(const TestInfo* test_info) {
     return test_info->should_run() && test_info->result()->Passed();
   }
 
   // Returns true iff test failed.
   static bool TestFailed(const TestInfo* test_info) {
     return test_info->should_run() && test_info->result()->Failed();
   }
 
   // Returns true iff the test is disabled and will be reported in the XML
   // report.
   static bool TestReportableDisabled(const TestInfo* test_info) {
     return test_info->is_reportable() && test_info->is_disabled_;
   }
 
   // Returns true iff test is disabled.
   static bool TestDisabled(const TestInfo* test_info) {
     return test_info->is_disabled_;
   }
 
   // Returns true iff this test will appear in the XML report.
   static bool TestReportable(const TestInfo* test_info) {
     return test_info->is_reportable();
   }
 
   // Returns true if the given test should run.
   static bool ShouldRunTest(const TestInfo* test_info) {
     return test_info->should_run();
   }
 
   // Shuffles the tests in this test case.
   void ShuffleTests(internal::Random* random);
 
   // Restores the test order to before the first shuffle.
   void UnshuffleTests();
 
   // Name of the test case.
   std::string name_;
   // Name of the parameter type, or NULL if this is not a typed or a
   // type-parameterized test.
   const internal::scoped_ptr<const ::std::string> type_param_;
   // The vector of TestInfos in their original order.  It owns the
   // elements in the vector.
   std::vector<TestInfo*> test_info_list_;
   // Provides a level of indirection for the test list to allow easy
   // shuffling and restoring the test order.  The i-th element in this
   // vector is the index of the i-th test in the shuffled test list.
   std::vector<int> test_indices_;
   // Pointer to the function that sets up the test case.
   Test::SetUpTestCaseFunc set_up_tc_;
   // Pointer to the function that tears down the test case.
   Test::TearDownTestCaseFunc tear_down_tc_;
   // True iff any test in this test case should run.
   bool should_run_;
   // Elapsed time, in milliseconds.
   TimeInMillis elapsed_time_;
   // Holds test properties recorded during execution of SetUpTestCase and
   // TearDownTestCase.
   TestResult ad_hoc_test_result_;
 
   // We disallow copying TestCases.
   GTEST_DISALLOW_COPY_AND_ASSIGN_(TestCase);
 };
 
 // An Environment object is capable of setting up and tearing down an
 // environment.  You should subclass this to define your own
 // environment(s).
 //
 // An Environment object does the set-up and tear-down in virtual
 // methods SetUp() and TearDown() instead of the constructor and the
 // destructor, as:
 //
 //   1. You cannot safely throw from a destructor.  This is a problem
 //      as in some cases Google Test is used where exceptions are enabled, and
 //      we may want to implement ASSERT_* using exceptions where they are
 //      available.
 //   2. You cannot use ASSERT_* directly in a constructor or
 //      destructor.
 class Environment {
  public:
   // The d'tor is virtual as we need to subclass Environment.
   virtual ~Environment() {}
 
   // Override this to define how to set up the environment.
   virtual void SetUp() {}
 
   // Override this to define how to tear down the environment.
   virtual void TearDown() {}
  private:
   // If you see an error about overriding the following function or
   // about it being private, you have mis-spelled SetUp() as Setup().
   struct Setup_should_be_spelled_SetUp {};
   virtual Setup_should_be_spelled_SetUp* Setup() { return NULL; }
 };
 
 // The interface for tracing execution of tests. The methods are organized in
 // the order the corresponding events are fired.
 class TestEventListener {
  public:
   virtual ~TestEventListener() {}
 
   // Fired before any test activity starts.
   virtual void OnTestProgramStart(const UnitTest& unit_test) = 0;
 
   // Fired before each iteration of tests starts.  There may be more than
   // one iteration if GTEST_FLAG(repeat) is set. iteration is the iteration
   // index, starting from 0.
   virtual void OnTestIterationStart(const UnitTest& unit_test,
                                     int iteration) = 0;
 
   // Fired before environment set-up for each iteration of tests starts.
   virtual void OnEnvironmentsSetUpStart(const UnitTest& unit_test) = 0;
 
   // Fired after environment set-up for each iteration of tests ends.
   virtual void OnEnvironmentsSetUpEnd(const UnitTest& unit_test) = 0;
 
   // Fired before the test case starts.
   virtual void OnTestCaseStart(const TestCase& test_case) = 0;
 
   // Fired before the test starts.
   virtual void OnTestStart(const TestInfo& test_info) = 0;
 
   // Fired after a failed assertion or a SUCCEED() invocation.
   virtual void OnTestPartResult(const TestPartResult& test_part_result) = 0;
 
   // Fired after the test ends.
   virtual void OnTestEnd(const TestInfo& test_info) = 0;
 
   // Fired after the test case ends.
   virtual void OnTestCaseEnd(const TestCase& test_case) = 0;
 
   // Fired before environment tear-down for each iteration of tests starts.
   virtual void OnEnvironmentsTearDownStart(const UnitTest& unit_test) = 0;
 
   // Fired after environment tear-down for each iteration of tests ends.
   virtual void OnEnvironmentsTearDownEnd(const UnitTest& unit_test) = 0;
 
   // Fired after each iteration of tests finishes.
   virtual void OnTestIterationEnd(const UnitTest& unit_test,
                                   int iteration) = 0;
 
   // Fired after all test activities have ended.
   virtual void OnTestProgramEnd(const UnitTest& unit_test) = 0;
 };
 
 // The convenience class for users who need to override just one or two
 // methods and are not concerned that a possible change to a signature of
 // the methods they override will not be caught during the build.  For
 // comments about each method please see the definition of TestEventListener
 // above.
 class EmptyTestEventListener : public TestEventListener {
  public:
   virtual void OnTestProgramStart(const UnitTest& /*unit_test*/) {}
   virtual void OnTestIterationStart(const UnitTest& /*unit_test*/,
                                     int /*iteration*/) {}
   virtual void OnEnvironmentsSetUpStart(const UnitTest& /*unit_test*/) {}
   virtual void OnEnvironmentsSetUpEnd(const UnitTest& /*unit_test*/) {}
   virtual void OnTestCaseStart(const TestCase& /*test_case*/) {}
   virtual void OnTestStart(const TestInfo& /*test_info*/) {}
   virtual void OnTestPartResult(const TestPartResult& /*test_part_result*/) {}
   virtual void OnTestEnd(const TestInfo& /*test_info*/) {}
   virtual void OnTestCaseEnd(const TestCase& /*test_case*/) {}
   virtual void OnEnvironmentsTearDownStart(const UnitTest& /*unit_test*/) {}
   virtual void OnEnvironmentsTearDownEnd(const UnitTest& /*unit_test*/) {}
   virtual void OnTestIterationEnd(const UnitTest& /*unit_test*/,
                                   int /*iteration*/) {}
   virtual void OnTestProgramEnd(const UnitTest& /*unit_test*/) {}
 };
 
 // TestEventListeners lets users add listeners to track events in Google Test.
 class GTEST_API_ TestEventListeners {
  public:
   TestEventListeners();
   ~TestEventListeners();
 
   // Appends an event listener to the end of the list. Google Test assumes
   // the ownership of the listener (i.e. it will delete the listener when
   // the test program finishes).
   void Append(TestEventListener* listener);
 
   // Removes the given event listener from the list and returns it.  It then
   // becomes the caller's responsibility to delete the listener. Returns
   // NULL if the listener is not found in the list.
   TestEventListener* Release(TestEventListener* listener);
 
   // Returns the standard listener responsible for the default console
   // output.  Can be removed from the listeners list to shut down default
   // console output.  Note that removing this object from the listener list
   // with Release transfers its ownership to the caller and makes this
   // function return NULL the next time.
   TestEventListener* default_result_printer() const {
     return default_result_printer_;
   }
 
   // Returns the standard listener responsible for the default XML output
   // controlled by the --gtest_output=xml flag.  Can be removed from the
   // listeners list by users who want to shut down the default XML output
   // controlled by this flag and substitute it with custom one.  Note that
   // removing this object from the listener list with Release transfers its
   // ownership to the caller and makes this function return NULL the next
   // time.
   TestEventListener* default_xml_generator() const {
     return default_xml_generator_;
   }
 
  private:
   friend class TestCase;
   friend class TestInfo;
   friend class internal::DefaultGlobalTestPartResultReporter;
   friend class internal::NoExecDeathTest;
   friend class internal::TestEventListenersAccessor;
   friend class internal::UnitTestImpl;
 
   // Returns repeater that broadcasts the TestEventListener events to all
   // subscribers.
   TestEventListener* repeater();
 
   // Sets the default_result_printer attribute to the provided listener.
   // The listener is also added to the listener list and previous
   // default_result_printer is removed from it and deleted. The listener can
   // also be NULL in which case it will not be added to the list. Does
   // nothing if the previous and the current listener objects are the same.
   void SetDefaultResultPrinter(TestEventListener* listener);
 
   // Sets the default_xml_generator attribute to the provided listener.  The
   // listener is also added to the listener list and previous
   // default_xml_generator is removed from it and deleted. The listener can
   // also be NULL in which case it will not be added to the list. Does
   // nothing if the previous and the current listener objects are the same.
   void SetDefaultXmlGenerator(TestEventListener* listener);
 
   // Controls whether events will be forwarded by the repeater to the
   // listeners in the list.
   bool EventForwardingEnabled() const;
   void SuppressEventForwarding();
 
   // The actual list of listeners.
   internal::TestEventRepeater* repeater_;
   // Listener responsible for the standard result output.
   TestEventListener* default_result_printer_;
   // Listener responsible for the creation of the XML output file.
   TestEventListener* default_xml_generator_;
 
   // We disallow copying TestEventListeners.
   GTEST_DISALLOW_COPY_AND_ASSIGN_(TestEventListeners);
 };
 
 // A UnitTest consists of a vector of TestCases.
 //
 // This is a singleton class.  The only instance of UnitTest is
 // created when UnitTest::GetInstance() is first called.  This
 // instance is never deleted.
 //
 // UnitTest is not copyable.
 //
 // This class is thread-safe as long as the methods are called
 // according to their specification.
 class GTEST_API_ UnitTest {
  public:
   // Gets the singleton UnitTest object.  The first time this method
   // is called, a UnitTest object is constructed and returned.
   // Consecutive calls will return the same object.
   static UnitTest* GetInstance();
 
   // Runs all tests in this UnitTest object and prints the result.
   // Returns 0 if successful, or 1 otherwise.
   //
   // This method can only be called from the main thread.
   //
   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
   int Run() GTEST_MUST_USE_RESULT_;
 
   // Returns the working directory when the first TEST() or TEST_F()
   // was executed.  The UnitTest object owns the string.
   const char* original_working_dir() const;
 
   // Returns the TestCase object for the test that's currently running,
   // or NULL if no test is running.
   const TestCase* current_test_case() const
       GTEST_LOCK_EXCLUDED_(mutex_);
 
   // Returns the TestInfo object for the test that's currently running,
   // or NULL if no test is running.
   const TestInfo* current_test_info() const
       GTEST_LOCK_EXCLUDED_(mutex_);
 
   // Returns the random seed used at the start of the current test run.
   int random_seed() const;
 
   // Returns the ParameterizedTestCaseRegistry object used to keep track of
   // value-parameterized tests and instantiate and register them.
   //
   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
   internal::ParameterizedTestCaseRegistry& parameterized_test_registry()
       GTEST_LOCK_EXCLUDED_(mutex_);
 
   // Gets the number of successful test cases.
   int successful_test_case_count() const;
 
   // Gets the number of failed test cases.
   int failed_test_case_count() const;
 
   // Gets the number of all test cases.
   int total_test_case_count() const;
 
   // Gets the number of all test cases that contain at least one test
   // that should run.
   int test_case_to_run_count() const;
 
   // Gets the number of successful tests.
   int successful_test_count() const;
 
   // Gets the number of failed tests.
   int failed_test_count() const;
 
   // Gets the number of disabled tests that will be reported in the XML report.
   int reportable_disabled_test_count() const;
 
   // Gets the number of disabled tests.
   int disabled_test_count() const;
 
   // Gets the number of tests to be printed in the XML report.
   int reportable_test_count() const;
 
   // Gets the number of all tests.
   int total_test_count() const;
 
   // Gets the number of tests that should run.
   int test_to_run_count() const;
 
   // Gets the time of the test program start, in ms from the start of the
   // UNIX epoch.
   TimeInMillis start_timestamp() const;
 
   // Gets the elapsed time, in milliseconds.
   TimeInMillis elapsed_time() const;
 
   // Returns true iff the unit test passed (i.e. all test cases passed).
   bool Passed() const;
 
   // Returns true iff the unit test failed (i.e. some test case failed
   // or something outside of all tests failed).
   bool Failed() const;
 
   // Gets the i-th test case among all the test cases. i can range from 0 to
   // total_test_case_count() - 1. If i is not in that range, returns NULL.
   const TestCase* GetTestCase(int i) const;
 
   // Returns the TestResult containing information on test failures and
   // properties logged outside of individual test cases.
   const TestResult& ad_hoc_test_result() const;
 
   // Returns the list of event listeners that can be used to track events
   // inside Google Test.
   TestEventListeners& listeners();
 
  private:
   // Registers and returns a global test environment.  When a test
   // program is run, all global test environments will be set-up in
   // the order they were registered.  After all tests in the program
   // have finished, all global test environments will be torn-down in
   // the *reverse* order they were registered.
   //
   // The UnitTest object takes ownership of the given environment.
   //
   // This method can only be called from the main thread.
   Environment* AddEnvironment(Environment* env);
 
   // Adds a TestPartResult to the current TestResult object.  All
   // Google Test assertion macros (e.g. ASSERT_TRUE, EXPECT_EQ, etc)
   // eventually call this to report their results.  The user code
   // should use the assertion macros instead of calling this directly.
   void AddTestPartResult(TestPartResult::Type result_type,
                          const char* file_name,
                          int line_number,
                          const std::string& message,
                          const std::string& os_stack_trace)
       GTEST_LOCK_EXCLUDED_(mutex_);
 
   // Adds a TestProperty to the current TestResult object when invoked from
   // inside a test, to current TestCase's ad_hoc_test_result_ when invoked
   // from SetUpTestCase or TearDownTestCase, or to the global property set
   // when invoked elsewhere.  If the result already contains a property with
   // the same key, the value will be updated.
   void RecordProperty(const std::string& key, const std::string& value);
 
   // Gets the i-th test case among all the test cases. i can range from 0 to
   // total_test_case_count() - 1. If i is not in that range, returns NULL.
   TestCase* GetMutableTestCase(int i);
 
   // Accessors for the implementation object.
   internal::UnitTestImpl* impl() { return impl_; }
   const internal::UnitTestImpl* impl() const { return impl_; }
 
   // These classes and functions are friends as they need to access private
   // members of UnitTest.
   friend class Test;
   friend class internal::AssertHelper;
   friend class internal::ScopedTrace;
   friend class internal::StreamingListenerTest;
   friend class internal::UnitTestRecordPropertyTestHelper;
   friend Environment* AddGlobalTestEnvironment(Environment* env);
   friend internal::UnitTestImpl* internal::GetUnitTestImpl();
   friend void internal::ReportFailureInUnknownLocation(
       TestPartResult::Type result_type,
       const std::string& message);
 
   // Creates an empty UnitTest.
   UnitTest();
 
   // D'tor
   virtual ~UnitTest();
 
   // Pushes a trace defined by SCOPED_TRACE() on to the per-thread
   // Google Test trace stack.
   void PushGTestTrace(const internal::TraceInfo& trace)
       GTEST_LOCK_EXCLUDED_(mutex_);
 
   // Pops a trace from the per-thread Google Test trace stack.
   void PopGTestTrace()
       GTEST_LOCK_EXCLUDED_(mutex_);
 
   // Protects mutable state in *impl_.  This is mutable as some const
   // methods need to lock it too.
   mutable internal::Mutex mutex_;
 
   // Opaque implementation object.  This field is never changed once
   // the object is constructed.  We don't mark it as const here, as
   // doing so will cause a warning in the constructor of UnitTest.
   // Mutable state in *impl_ is protected by mutex_.
   internal::UnitTestImpl* impl_;
 
   // We disallow copying UnitTest.
   GTEST_DISALLOW_COPY_AND_ASSIGN_(UnitTest);
 };
 
 // A convenient wrapper for adding an environment for the test
 // program.
 //
 // You should call this before RUN_ALL_TESTS() is called, probably in
 // main().  If you use gtest_main, you need to call this before main()
 // starts for it to take effect.  For example, you can define a global
 // variable like this:
 //
 //   testing::Environment* const foo_env =
 //       testing::AddGlobalTestEnvironment(new FooEnvironment);
 //
 // However, we strongly recommend you to write your own main() and
 // call AddGlobalTestEnvironment() there, as relying on initialization
 // of global variables makes the code harder to read and may cause
 // problems when you register multiple environments from different
 // translation units and the environments have dependencies among them
 // (remember that the compiler doesn't guarantee the order in which
 // global variables from different translation units are initialized).
 inline Environment* AddGlobalTestEnvironment(Environment* env) {
   return UnitTest::GetInstance()->AddEnvironment(env);
 }
 
 // Initializes Google Test.  This must be called before calling
 // RUN_ALL_TESTS().  In particular, it parses a command line for the
 // flags that Google Test recognizes.  Whenever a Google Test flag is
 // seen, it is removed from argv, and *argc is decremented.
 //
 // No value is returned.  Instead, the Google Test flag variables are
 // updated.
 //
 // Calling the function for the second time has no user-visible effect.
 GTEST_API_ void InitGoogleTest(int* argc, char** argv);
 
 // This overloaded version can be used in Windows programs compiled in
 // UNICODE mode.
 GTEST_API_ void InitGoogleTest(int* argc, wchar_t** argv);
 
 namespace internal {
 
 // Separate the error generating code from the code path to reduce the stack
 // frame size of CmpHelperEQ. This helps reduce the overhead of some sanitizers
 // when calling EXPECT_* in a tight loop.
 template <typename T1, typename T2>
 AssertionResult CmpHelperEQFailure(const char* lhs_expression,
                                    const char* rhs_expression,
                                    const T1& lhs, const T2& rhs) {
   return EqFailure(lhs_expression,
                    rhs_expression,
                    FormatForComparisonFailureMessage(lhs, rhs),
                    FormatForComparisonFailureMessage(rhs, lhs),
                    false);
 }
 
 // The helper function for {ASSERT|EXPECT}_EQ.
 template <typename T1, typename T2>
 AssertionResult CmpHelperEQ(const char* lhs_expression,
                             const char* rhs_expression,
                             const T1& lhs,
                             const T2& rhs) {
-GTEST_DISABLE_MSC_WARNINGS_PUSH_(4389 /* signed/unsigned mismatch */)
   if (lhs == rhs) {
     return AssertionSuccess();
   }
-GTEST_DISABLE_MSC_WARNINGS_POP_()
 
   return CmpHelperEQFailure(lhs_expression, rhs_expression, lhs, rhs);
 }
 
 // With this overloaded version, we allow anonymous enums to be used
 // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous enums
 // can be implicitly cast to BiggestInt.
 GTEST_API_ AssertionResult CmpHelperEQ(const char* lhs_expression,
                                        const char* rhs_expression,
                                        BiggestInt lhs,
                                        BiggestInt rhs);
 
 // The helper class for {ASSERT|EXPECT}_EQ.  The template argument
 // lhs_is_null_literal is true iff the first argument to ASSERT_EQ()
 // is a null pointer literal.  The following default implementation is
 // for lhs_is_null_literal being false.
 template <bool lhs_is_null_literal>
 class EqHelper {
  public:
   // This templatized version is for the general case.
   template <typename T1, typename T2>
   static AssertionResult Compare(const char* lhs_expression,
                                  const char* rhs_expression,
                                  const T1& lhs,
                                  const T2& rhs) {
     return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
   }
 
   // With this overloaded version, we allow anonymous enums to be used
   // in {ASSERT|EXPECT}_EQ when compiled with gcc 4, as anonymous
   // enums can be implicitly cast to BiggestInt.
   //
   // Even though its body looks the same as the above version, we
   // cannot merge the two, as it will make anonymous enums unhappy.
   static AssertionResult Compare(const char* lhs_expression,
                                  const char* rhs_expression,
                                  BiggestInt lhs,
                                  BiggestInt rhs) {
     return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
   }
 };
 
 // This specialization is used when the first argument to ASSERT_EQ()
 // is a null pointer literal, like NULL, false, or 0.
 template <>
 class EqHelper<true> {
  public:
   // We define two overloaded versions of Compare().  The first
   // version will be picked when the second argument to ASSERT_EQ() is
   // NOT a pointer, e.g. ASSERT_EQ(0, AnIntFunction()) or
   // EXPECT_EQ(false, a_bool).
   template <typename T1, typename T2>
   static AssertionResult Compare(
       const char* lhs_expression,
       const char* rhs_expression,
       const T1& lhs,
       const T2& rhs,
       // The following line prevents this overload from being considered if T2
       // is not a pointer type.  We need this because ASSERT_EQ(NULL, my_ptr)
       // expands to Compare("", "", NULL, my_ptr), which requires a conversion
       // to match the Secret* in the other overload, which would otherwise make
       // this template match better.
       typename EnableIf<!is_pointer<T2>::value>::type* = 0) {
     return CmpHelperEQ(lhs_expression, rhs_expression, lhs, rhs);
   }
 
   // This version will be picked when the second argument to ASSERT_EQ() is a
   // pointer, e.g. ASSERT_EQ(NULL, a_pointer).
   template <typename T>
   static AssertionResult Compare(
       const char* lhs_expression,
       const char* rhs_expression,
       // We used to have a second template parameter instead of Secret*.  That
       // template parameter would deduce to 'long', making this a better match
       // than the first overload even without the first overload's EnableIf.
       // Unfortunately, gcc with -Wconversion-null warns when "passing NULL to
       // non-pointer argument" (even a deduced integral argument), so the old
       // implementation caused warnings in user code.
       Secret* /* lhs (NULL) */,
       T* rhs) {
     // We already know that 'lhs' is a null pointer.
     return CmpHelperEQ(lhs_expression, rhs_expression,
                        static_cast<T*>(NULL), rhs);
   }
 };
 
 // Separate the error generating code from the code path to reduce the stack
 // frame size of CmpHelperOP. This helps reduce the overhead of some sanitizers
 // when calling EXPECT_OP in a tight loop.
 template <typename T1, typename T2>
 AssertionResult CmpHelperOpFailure(const char* expr1, const char* expr2,
                                    const T1& val1, const T2& val2,
                                    const char* op) {
   return AssertionFailure()
          << "Expected: (" << expr1 << ") " << op << " (" << expr2
          << "), actual: " << FormatForComparisonFailureMessage(val1, val2)
          << " vs " << FormatForComparisonFailureMessage(val2, val1);
 }
 
 // A macro for implementing the helper functions needed to implement
 // ASSERT_?? and EXPECT_??.  It is here just to avoid copy-and-paste
 // of similar code.
 //
 // For each templatized helper function, we also define an overloaded
 // version for BiggestInt in order to reduce code bloat and allow
 // anonymous enums to be used with {ASSERT|EXPECT}_?? when compiled
 // with gcc 4.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 
 #define GTEST_IMPL_CMP_HELPER_(op_name, op)\
 template <typename T1, typename T2>\
 AssertionResult CmpHelper##op_name(const char* expr1, const char* expr2, \
                                    const T1& val1, const T2& val2) {\
   if (val1 op val2) {\
     return AssertionSuccess();\
   } else {\
     return CmpHelperOpFailure(expr1, expr2, val1, val2, #op);\
   }\
 }\
 GTEST_API_ AssertionResult CmpHelper##op_name(\
     const char* expr1, const char* expr2, BiggestInt val1, BiggestInt val2)
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 
 // Implements the helper function for {ASSERT|EXPECT}_NE
 GTEST_IMPL_CMP_HELPER_(NE, !=);
 // Implements the helper function for {ASSERT|EXPECT}_LE
 GTEST_IMPL_CMP_HELPER_(LE, <=);
 // Implements the helper function for {ASSERT|EXPECT}_LT
 GTEST_IMPL_CMP_HELPER_(LT, <);
 // Implements the helper function for {ASSERT|EXPECT}_GE
 GTEST_IMPL_CMP_HELPER_(GE, >=);
 // Implements the helper function for {ASSERT|EXPECT}_GT
 GTEST_IMPL_CMP_HELPER_(GT, >);
 
 #undef GTEST_IMPL_CMP_HELPER_
 
 // The helper function for {ASSERT|EXPECT}_STREQ.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
                                           const char* s2_expression,
                                           const char* s1,
                                           const char* s2);
 
 // The helper function for {ASSERT|EXPECT}_STRCASEEQ.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult CmpHelperSTRCASEEQ(const char* s1_expression,
                                               const char* s2_expression,
                                               const char* s1,
                                               const char* s2);
 
 // The helper function for {ASSERT|EXPECT}_STRNE.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
                                           const char* s2_expression,
                                           const char* s1,
                                           const char* s2);
 
 // The helper function for {ASSERT|EXPECT}_STRCASENE.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult CmpHelperSTRCASENE(const char* s1_expression,
                                               const char* s2_expression,
                                               const char* s1,
                                               const char* s2);
 
 
 // Helper function for *_STREQ on wide strings.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult CmpHelperSTREQ(const char* s1_expression,
                                           const char* s2_expression,
                                           const wchar_t* s1,
                                           const wchar_t* s2);
 
 // Helper function for *_STRNE on wide strings.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult CmpHelperSTRNE(const char* s1_expression,
                                           const char* s2_expression,
                                           const wchar_t* s1,
                                           const wchar_t* s2);
 
 }  // namespace internal
 
 // IsSubstring() and IsNotSubstring() are intended to be used as the
 // first argument to {EXPECT,ASSERT}_PRED_FORMAT2(), not by
 // themselves.  They check whether needle is a substring of haystack
 // (NULL is considered a substring of itself only), and return an
 // appropriate error message when they fail.
 //
 // The {needle,haystack}_expr arguments are the stringified
 // expressions that generated the two real arguments.
 GTEST_API_ AssertionResult IsSubstring(
     const char* needle_expr, const char* haystack_expr,
     const char* needle, const char* haystack);
 GTEST_API_ AssertionResult IsSubstring(
     const char* needle_expr, const char* haystack_expr,
     const wchar_t* needle, const wchar_t* haystack);
 GTEST_API_ AssertionResult IsNotSubstring(
     const char* needle_expr, const char* haystack_expr,
     const char* needle, const char* haystack);
 GTEST_API_ AssertionResult IsNotSubstring(
     const char* needle_expr, const char* haystack_expr,
     const wchar_t* needle, const wchar_t* haystack);
 GTEST_API_ AssertionResult IsSubstring(
     const char* needle_expr, const char* haystack_expr,
     const ::std::string& needle, const ::std::string& haystack);
 GTEST_API_ AssertionResult IsNotSubstring(
     const char* needle_expr, const char* haystack_expr,
     const ::std::string& needle, const ::std::string& haystack);
 
 #if GTEST_HAS_STD_WSTRING
 GTEST_API_ AssertionResult IsSubstring(
     const char* needle_expr, const char* haystack_expr,
     const ::std::wstring& needle, const ::std::wstring& haystack);
 GTEST_API_ AssertionResult IsNotSubstring(
     const char* needle_expr, const char* haystack_expr,
     const ::std::wstring& needle, const ::std::wstring& haystack);
 #endif  // GTEST_HAS_STD_WSTRING
 
 namespace internal {
 
 // Helper template function for comparing floating-points.
 //
 // Template parameter:
 //
 //   RawType: the raw floating-point type (either float or double)
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 template <typename RawType>
 AssertionResult CmpHelperFloatingPointEQ(const char* lhs_expression,
                                          const char* rhs_expression,
                                          RawType lhs_value,
                                          RawType rhs_value) {
   const FloatingPoint<RawType> lhs(lhs_value), rhs(rhs_value);
 
   if (lhs.AlmostEquals(rhs)) {
     return AssertionSuccess();
   }
 
   ::std::stringstream lhs_ss;
   lhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
          << lhs_value;
 
   ::std::stringstream rhs_ss;
   rhs_ss << std::setprecision(std::numeric_limits<RawType>::digits10 + 2)
          << rhs_value;
 
   return EqFailure(lhs_expression,
                    rhs_expression,
                    StringStreamToString(&lhs_ss),
                    StringStreamToString(&rhs_ss),
                    false);
 }
 
 // Helper function for implementing ASSERT_NEAR.
 //
 // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
 GTEST_API_ AssertionResult DoubleNearPredFormat(const char* expr1,
                                                 const char* expr2,
                                                 const char* abs_error_expr,
                                                 double val1,
                                                 double val2,
                                                 double abs_error);
 
 // INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
 // A class that enables one to stream messages to assertion macros
 class GTEST_API_ AssertHelper {
  public:
   // Constructor.
   AssertHelper(TestPartResult::Type type,
                const char* file,
                int line,
                const char* message);
   ~AssertHelper();
 
   // Message assignment is a semantic trick to enable assertion
   // streaming; see the GTEST_MESSAGE_ macro below.
   void operator=(const Message& message) const;
 
  private:
   // We put our data in a struct so that the size of the AssertHelper class can
   // be as small as possible.  This is important because gcc is incapable of
   // re-using stack space even for temporary variables, so every EXPECT_EQ
   // reserves stack space for another AssertHelper.
   struct AssertHelperData {
     AssertHelperData(TestPartResult::Type t,
                      const char* srcfile,
                      int line_num,
                      const char* msg)
         : type(t), file(srcfile), line(line_num), message(msg) { }
 
     TestPartResult::Type const type;
     const char* const file;
     int const line;
     std::string const message;
 
    private:
     GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelperData);
   };
 
   AssertHelperData* const data_;
 
   GTEST_DISALLOW_COPY_AND_ASSIGN_(AssertHelper);
 };
 
 }  // namespace internal
 
 // The pure interface class that all value-parameterized tests inherit from.
 // A value-parameterized class must inherit from both ::testing::Test and
 // ::testing::WithParamInterface. In most cases that just means inheriting
 // from ::testing::TestWithParam, but more complicated test hierarchies
 // may need to inherit from Test and WithParamInterface at different levels.
 //
 // This interface has support for accessing the test parameter value via
 // the GetParam() method.
 //
 // Use it with one of the parameter generator defining functions, like Range(),
 // Values(), ValuesIn(), Bool(), and Combine().
 //
 // class FooTest : public ::testing::TestWithParam<int> {
 //  protected:
 //   FooTest() {
 //     // Can use GetParam() here.
 //   }
 //   virtual ~FooTest() {
 //     // Can use GetParam() here.
 //   }
 //   virtual void SetUp() {
 //     // Can use GetParam() here.
 //   }
 //   virtual void TearDown {
 //     // Can use GetParam() here.
 //   }
 // };
 // TEST_P(FooTest, DoesBar) {
 //   // Can use GetParam() method here.
 //   Foo foo;
 //   ASSERT_TRUE(foo.DoesBar(GetParam()));
 // }
 // INSTANTIATE_TEST_CASE_P(OneToTenRange, FooTest, ::testing::Range(1, 10));
 
 template <typename T>
 class WithParamInterface {
  public:
   typedef T ParamType;
   virtual ~WithParamInterface() {}
 
   // The current parameter value. Is also available in the test fixture's
   // constructor. This member function is non-static, even though it only
   // references static data, to reduce the opportunity for incorrect uses
   // like writing 'WithParamInterface<bool>::GetParam()' for a test that
   // uses a fixture whose parameter type is int.
   const ParamType& GetParam() const {
     GTEST_CHECK_(parameter_ != NULL)
         << "GetParam() can only be called inside a value-parameterized test "
         << "-- did you intend to write TEST_P instead of TEST_F?";
     return *parameter_;
   }
 
  private:
   // Sets parameter value. The caller is responsible for making sure the value
   // remains alive and unchanged throughout the current test.
   static void SetParam(const ParamType* parameter) {
     parameter_ = parameter;
   }
 
   // Static value used for accessing parameter during a test lifetime.
   static const ParamType* parameter_;
 
   // TestClass must be a subclass of WithParamInterface<T> and Test.
   template <class TestClass> friend class internal::ParameterizedTestFactory;
 };
 
 template <typename T>
 const T* WithParamInterface<T>::parameter_ = NULL;
 
 // Most value-parameterized classes can ignore the existence of
 // WithParamInterface, and can just inherit from ::testing::TestWithParam.
 
 template <typename T>
 class TestWithParam : public Test, public WithParamInterface<T> {
 };
 
 
 // Macros for indicating success/failure in test code.
 
 // ADD_FAILURE unconditionally adds a failure to the current test.
 // SUCCEED generates a success - it doesn't automatically make the
 // current test successful, as a test is only successful when it has
 // no failure.
 //
 // EXPECT_* verifies that a certain condition is satisfied.  If not,
 // it behaves like ADD_FAILURE.  In particular:
 //
 //   EXPECT_TRUE  verifies that a Boolean condition is true.
 //   EXPECT_FALSE verifies that a Boolean condition is false.
 //
 // FAIL and ASSERT_* are similar to ADD_FAILURE and EXPECT_*, except
 // that they will also abort the current function on failure.  People
 // usually want the fail-fast behavior of FAIL and ASSERT_*, but those
 // writing data-driven tests often find themselves using ADD_FAILURE
 // and EXPECT_* more.
 
 // Generates a nonfatal failure with a generic message.
 #define ADD_FAILURE() GTEST_NONFATAL_FAILURE_("Failed")
 
 // Generates a nonfatal failure at the given source file location with
 // a generic message.
 #define ADD_FAILURE_AT(file, line) \
   GTEST_MESSAGE_AT_(file, line, "Failed", \
                     ::testing::TestPartResult::kNonFatalFailure)
 
 // Generates a fatal failure with a generic message.
 #define GTEST_FAIL() GTEST_FATAL_FAILURE_("Failed")
 
 // Define this macro to 1 to omit the definition of FAIL(), which is a
 // generic name and clashes with some other libraries.
 #if !GTEST_DONT_DEFINE_FAIL
 # define FAIL() GTEST_FAIL()
 #endif
 
 // Generates a success with a generic message.
 #define GTEST_SUCCEED() GTEST_SUCCESS_("Succeeded")
 
 // Define this macro to 1 to omit the definition of SUCCEED(), which
 // is a generic name and clashes with some other libraries.
 #if !GTEST_DONT_DEFINE_SUCCEED
 # define SUCCEED() GTEST_SUCCEED()
 #endif
 
 // Macros for testing exceptions.
 //
 //    * {ASSERT|EXPECT}_THROW(statement, expected_exception):
 //         Tests that the statement throws the expected exception.
 //    * {ASSERT|EXPECT}_NO_THROW(statement):
 //         Tests that the statement doesn't throw any exception.
 //    * {ASSERT|EXPECT}_ANY_THROW(statement):
 //         Tests that the statement throws an exception.
 
 #define EXPECT_THROW(statement, expected_exception) \
   GTEST_TEST_THROW_(statement, expected_exception, GTEST_NONFATAL_FAILURE_)
 #define EXPECT_NO_THROW(statement) \
   GTEST_TEST_NO_THROW_(statement, GTEST_NONFATAL_FAILURE_)
 #define EXPECT_ANY_THROW(statement) \
   GTEST_TEST_ANY_THROW_(statement, GTEST_NONFATAL_FAILURE_)
 #define ASSERT_THROW(statement, expected_exception) \
   GTEST_TEST_THROW_(statement, expected_exception, GTEST_FATAL_FAILURE_)
 #define ASSERT_NO_THROW(statement) \
   GTEST_TEST_NO_THROW_(statement, GTEST_FATAL_FAILURE_)
 #define ASSERT_ANY_THROW(statement) \
   GTEST_TEST_ANY_THROW_(statement, GTEST_FATAL_FAILURE_)
 
 // Boolean assertions. Condition can be either a Boolean expression or an
 // AssertionResult. For more information on how to use AssertionResult with
 // these macros see comments on that class.
 #define EXPECT_TRUE(condition) \
   GTEST_TEST_BOOLEAN_((condition), #condition, false, true, \
                       GTEST_NONFATAL_FAILURE_)
 #define EXPECT_FALSE(condition) \
   GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
                       GTEST_NONFATAL_FAILURE_)
 #define ASSERT_TRUE(condition) \
   GTEST_TEST_BOOLEAN_((condition), #condition, false, true, \
                       GTEST_FATAL_FAILURE_)
 #define ASSERT_FALSE(condition) \
   GTEST_TEST_BOOLEAN_(!(condition), #condition, true, false, \
                       GTEST_FATAL_FAILURE_)
 
 // Includes the auto-generated header that implements a family of
 // generic predicate assertion macros.
 #include "gtest/gtest_pred_impl.h"
 
 // Macros for testing equalities and inequalities.
 //
 //    * {ASSERT|EXPECT}_EQ(v1, v2): Tests that v1 == v2
 //    * {ASSERT|EXPECT}_NE(v1, v2): Tests that v1 != v2
 //    * {ASSERT|EXPECT}_LT(v1, v2): Tests that v1 < v2
 //    * {ASSERT|EXPECT}_LE(v1, v2): Tests that v1 <= v2
 //    * {ASSERT|EXPECT}_GT(v1, v2): Tests that v1 > v2
 //    * {ASSERT|EXPECT}_GE(v1, v2): Tests that v1 >= v2
 //
 // When they are not, Google Test prints both the tested expressions and
 // their actual values.  The values must be compatible built-in types,
 // or you will get a compiler error.  By "compatible" we mean that the
 // values can be compared by the respective operator.
 //
 // Note:
 //
 //   1. It is possible to make a user-defined type work with
 //   {ASSERT|EXPECT}_??(), but that requires overloading the
 //   comparison operators and is thus discouraged by the Google C++
 //   Usage Guide.  Therefore, you are advised to use the
 //   {ASSERT|EXPECT}_TRUE() macro to assert that two objects are
 //   equal.
 //
 //   2. The {ASSERT|EXPECT}_??() macros do pointer comparisons on
 //   pointers (in particular, C strings).  Therefore, if you use it
 //   with two C strings, you are testing how their locations in memory
 //   are related, not how their content is related.  To compare two C
 //   strings by content, use {ASSERT|EXPECT}_STR*().
 //
 //   3. {ASSERT|EXPECT}_EQ(v1, v2) is preferred to
 //   {ASSERT|EXPECT}_TRUE(v1 == v2), as the former tells you
 //   what the actual value is when it fails, and similarly for the
 //   other comparisons.
 //
 //   4. Do not depend on the order in which {ASSERT|EXPECT}_??()
 //   evaluate their arguments, which is undefined.
 //
 //   5. These macros evaluate their arguments exactly once.
 //
 // Examples:
 //
 //   EXPECT_NE(5, Foo());
 //   EXPECT_EQ(NULL, a_pointer);
 //   ASSERT_LT(i, array_size);
 //   ASSERT_GT(records.size(), 0) << "There is no record left.";
 
 #define EXPECT_EQ(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal:: \
                       EqHelper<GTEST_IS_NULL_LITERAL_(val1)>::Compare, \
                       val1, val2)
 #define EXPECT_NE(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
 #define EXPECT_LE(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
 #define EXPECT_LT(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
 #define EXPECT_GE(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
 #define EXPECT_GT(val1, val2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
 
 #define GTEST_ASSERT_EQ(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal:: \
                       EqHelper<GTEST_IS_NULL_LITERAL_(val1)>::Compare, \
                       val1, val2)
 #define GTEST_ASSERT_NE(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperNE, val1, val2)
 #define GTEST_ASSERT_LE(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLE, val1, val2)
 #define GTEST_ASSERT_LT(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperLT, val1, val2)
 #define GTEST_ASSERT_GE(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGE, val1, val2)
 #define GTEST_ASSERT_GT(val1, val2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperGT, val1, val2)
 
 // Define macro GTEST_DONT_DEFINE_ASSERT_XY to 1 to omit the definition of
 // ASSERT_XY(), which clashes with some users' own code.
 
 #if !GTEST_DONT_DEFINE_ASSERT_EQ
 # define ASSERT_EQ(val1, val2) GTEST_ASSERT_EQ(val1, val2)
 #endif
 
 #if !GTEST_DONT_DEFINE_ASSERT_NE
 # define ASSERT_NE(val1, val2) GTEST_ASSERT_NE(val1, val2)
 #endif
 
 #if !GTEST_DONT_DEFINE_ASSERT_LE
 # define ASSERT_LE(val1, val2) GTEST_ASSERT_LE(val1, val2)
 #endif
 
 #if !GTEST_DONT_DEFINE_ASSERT_LT
 # define ASSERT_LT(val1, val2) GTEST_ASSERT_LT(val1, val2)
 #endif
 
 #if !GTEST_DONT_DEFINE_ASSERT_GE
 # define ASSERT_GE(val1, val2) GTEST_ASSERT_GE(val1, val2)
 #endif
 
 #if !GTEST_DONT_DEFINE_ASSERT_GT
 # define ASSERT_GT(val1, val2) GTEST_ASSERT_GT(val1, val2)
 #endif
 
 // C-string Comparisons.  All tests treat NULL and any non-NULL string
 // as different.  Two NULLs are equal.
 //
 //    * {ASSERT|EXPECT}_STREQ(s1, s2):     Tests that s1 == s2
 //    * {ASSERT|EXPECT}_STRNE(s1, s2):     Tests that s1 != s2
 //    * {ASSERT|EXPECT}_STRCASEEQ(s1, s2): Tests that s1 == s2, ignoring case
 //    * {ASSERT|EXPECT}_STRCASENE(s1, s2): Tests that s1 != s2, ignoring case
 //
 // For wide or narrow string objects, you can use the
 // {ASSERT|EXPECT}_??() macros.
 //
 // Don't depend on the order in which the arguments are evaluated,
 // which is undefined.
 //
 // These macros evaluate their arguments exactly once.
 
 #define EXPECT_STREQ(s1, s2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
 #define EXPECT_STRNE(s1, s2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
 #define EXPECT_STRCASEEQ(s1, s2) \
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
 #define EXPECT_STRCASENE(s1, s2)\
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
 
 #define ASSERT_STREQ(s1, s2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTREQ, s1, s2)
 #define ASSERT_STRNE(s1, s2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRNE, s1, s2)
 #define ASSERT_STRCASEEQ(s1, s2) \
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASEEQ, s1, s2)
 #define ASSERT_STRCASENE(s1, s2)\
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperSTRCASENE, s1, s2)
 
 // Macros for comparing floating-point numbers.
 //
 //    * {ASSERT|EXPECT}_FLOAT_EQ(val1, val2):
 //         Tests that two float values are almost equal.
 //    * {ASSERT|EXPECT}_DOUBLE_EQ(val1, val2):
 //         Tests that two double values are almost equal.
 //    * {ASSERT|EXPECT}_NEAR(v1, v2, abs_error):
 //         Tests that v1 and v2 are within the given distance to each other.
 //
 // Google Test uses ULP-based comparison to automatically pick a default
 // error bound that is appropriate for the operands.  See the
 // FloatingPoint template class in gtest-internal.h if you are
 // interested in the implementation details.
 
 #define EXPECT_FLOAT_EQ(val1, val2)\
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
                       val1, val2)
 
 #define EXPECT_DOUBLE_EQ(val1, val2)\
   EXPECT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
                       val1, val2)
 
 #define ASSERT_FLOAT_EQ(val1, val2)\
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<float>, \
                       val1, val2)
 
 #define ASSERT_DOUBLE_EQ(val1, val2)\
   ASSERT_PRED_FORMAT2(::testing::internal::CmpHelperFloatingPointEQ<double>, \
                       val1, val2)
 
 #define EXPECT_NEAR(val1, val2, abs_error)\
   EXPECT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
                       val1, val2, abs_error)
 
 #define ASSERT_NEAR(val1, val2, abs_error)\
   ASSERT_PRED_FORMAT3(::testing::internal::DoubleNearPredFormat, \
                       val1, val2, abs_error)
 
 // These predicate format functions work on floating-point values, and
 // can be used in {ASSERT|EXPECT}_PRED_FORMAT2*(), e.g.
 //
 //   EXPECT_PRED_FORMAT2(testing::DoubleLE, Foo(), 5.0);
 
 // Asserts that val1 is less than, or almost equal to, val2.  Fails
 // otherwise.  In particular, it fails if either val1 or val2 is NaN.
 GTEST_API_ AssertionResult FloatLE(const char* expr1, const char* expr2,
                                    float val1, float val2);
 GTEST_API_ AssertionResult DoubleLE(const char* expr1, const char* expr2,
                                     double val1, double val2);
 
 
 #if GTEST_OS_WINDOWS
 
 // Macros that test for HRESULT failure and success, these are only useful
 // on Windows, and rely on Windows SDK macros and APIs to compile.
 //
 //    * {ASSERT|EXPECT}_HRESULT_{SUCCEEDED|FAILED}(expr)
 //
 // When expr unexpectedly fails or succeeds, Google Test prints the
 // expected result and the actual result with both a human-readable
 // string representation of the error, if available, as well as the
 // hex result code.
 # define EXPECT_HRESULT_SUCCEEDED(expr) \
     EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
 
 # define ASSERT_HRESULT_SUCCEEDED(expr) \
     ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTSuccess, (expr))
 
 # define EXPECT_HRESULT_FAILED(expr) \
     EXPECT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
 
 # define ASSERT_HRESULT_FAILED(expr) \
     ASSERT_PRED_FORMAT1(::testing::internal::IsHRESULTFailure, (expr))
 
 #endif  // GTEST_OS_WINDOWS
 
 // Macros that execute statement and check that it doesn't generate new fatal
 // failures in the current thread.
 //
 //   * {ASSERT|EXPECT}_NO_FATAL_FAILURE(statement);
 //
 // Examples:
 //
 //   EXPECT_NO_FATAL_FAILURE(Process());
 //   ASSERT_NO_FATAL_FAILURE(Process()) << "Process() failed";
 //
 #define ASSERT_NO_FATAL_FAILURE(statement) \
     GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_FATAL_FAILURE_)
 #define EXPECT_NO_FATAL_FAILURE(statement) \
     GTEST_TEST_NO_FATAL_FAILURE_(statement, GTEST_NONFATAL_FAILURE_)
 
 // Causes a trace (including the source file path, the current line
 // number, and the given message) to be included in every test failure
 // message generated by code in the current scope.  The effect is
 // undone when the control leaves the current scope.
 //
 // The message argument can be anything streamable to std::ostream.
 //
 // In the implementation, we include the current line number as part
 // of the dummy variable name, thus allowing multiple SCOPED_TRACE()s
 // to appear in the same block - as long as they are on different
 // lines.
 #define SCOPED_TRACE(message) \
   ::testing::internal::ScopedTrace GTEST_CONCAT_TOKEN_(gtest_trace_, __LINE__)(\
     __FILE__, __LINE__, ::testing::Message() << (message))
 
 // Compile-time assertion for type equality.
 // StaticAssertTypeEq<type1, type2>() compiles iff type1 and type2 are
 // the same type.  The value it returns is not interesting.
 //
 // Instead of making StaticAssertTypeEq a class template, we make it a
 // function template that invokes a helper class template.  This
 // prevents a user from misusing StaticAssertTypeEq<T1, T2> by
 // defining objects of that type.
 //
 // CAVEAT:
 //
 // When used inside a method of a class template,
 // StaticAssertTypeEq<T1, T2>() is effective ONLY IF the method is
 // instantiated.  For example, given:
 //
 //   template <typename T> class Foo {
 //    public:
 //     void Bar() { testing::StaticAssertTypeEq<int, T>(); }
 //   };
 //
 // the code:
 //
 //   void Test1() { Foo<bool> foo; }
 //
 // will NOT generate a compiler error, as Foo<bool>::Bar() is never
 // actually instantiated.  Instead, you need:
 //
 //   void Test2() { Foo<bool> foo; foo.Bar(); }
 //
 // to cause a compiler error.
 template <typename T1, typename T2>
 bool StaticAssertTypeEq() {
   (void)internal::StaticAssertTypeEqHelper<T1, T2>();
   return true;
 }
 
 // Defines a test.
 //
 // The first parameter is the name of the test case, and the second
 // parameter is the name of the test within the test case.
 //
 // The convention is to end the test case name with "Test".  For
 // example, a test case for the Foo class can be named FooTest.
 //
 // Test code should appear between braces after an invocation of
 // this macro.  Example:
 //
 //   TEST(FooTest, InitializesCorrectly) {
 //     Foo foo;
 //     EXPECT_TRUE(foo.StatusIsOK());
 //   }
 
 // Note that we call GetTestTypeId() instead of GetTypeId<
 // ::testing::Test>() here to get the type ID of testing::Test.  This
 // is to work around a suspected linker bug when using Google Test as
 // a framework on Mac OS X.  The bug causes GetTypeId<
 // ::testing::Test>() to return different values depending on whether
 // the call is from the Google Test framework itself or from user test
 // code.  GetTestTypeId() is guaranteed to always return the same
 // value, as it always calls GetTypeId<>() from the Google Test
 // framework.
 #define GTEST_TEST(test_case_name, test_name)\
   GTEST_TEST_(test_case_name, test_name, \
               ::testing::Test, ::testing::internal::GetTestTypeId())
 
 // Define this macro to 1 to omit the definition of TEST(), which
 // is a generic name and clashes with some other libraries.
 #if !GTEST_DONT_DEFINE_TEST
 # define TEST(test_case_name, test_name) GTEST_TEST(test_case_name, test_name)
 #endif
 
 // Defines a test that uses a test fixture.
 //
 // The first parameter is the name of the test fixture class, which
 // also doubles as the test case name.  The second parameter is the
 // name of the test within the test case.
 //
 // A test fixture class must be declared earlier.  The user should put
 // the test code between braces after using this macro.  Example:
 //
 //   class FooTest : public testing::Test {
 //    protected:
 //     virtual void SetUp() { b_.AddElement(3); }
 //
 //     Foo a_;
 //     Foo b_;
 //   };
 //
 //   TEST_F(FooTest, InitializesCorrectly) {
 //     EXPECT_TRUE(a_.StatusIsOK());
 //   }
 //
 //   TEST_F(FooTest, ReturnsElementCountCorrectly) {
 //     EXPECT_EQ(0, a_.size());
 //     EXPECT_EQ(1, b_.size());
 //   }
 
 #define TEST_F(test_fixture, test_name)\
   GTEST_TEST_(test_fixture, test_name, test_fixture, \
               ::testing::internal::GetTypeId<test_fixture>())
 
 // Returns a path to temporary directory.
 // Tries to determine an appropriate directory for the platform.
 GTEST_API_ std::string TempDir();
 
 }  // namespace testing
 
 // Use this function in main() to run all tests.  It returns 0 if all
 // tests are successful, or 1 otherwise.
 //
 // RUN_ALL_TESTS() should be invoked after the command line has been
 // parsed by InitGoogleTest().
 //
 // This function was formerly a macro; thus, it is in the global
 // namespace and has an all-caps name.
 int RUN_ALL_TESTS() GTEST_MUST_USE_RESULT_;
 
 inline int RUN_ALL_TESTS() {
   return ::testing::UnitTest::GetInstance()->Run();
 }
 
 #endif  // GTEST_INCLUDE_GTEST_GTEST_H_