Attachment 8176 Details for Bug 36972 – main.cpp

main.cpp

main.cpp (text/x-c++src), 174.92 KB, created by Aleksei Nikiforov on 2019-07-04 10:49:35 MSK

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Creator: Aleksei Nikiforov

Created: 2019-07-04 10:49:35 MSK

Size: 174.92 KB

patch

obsolete

>// 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.
>//
>// Authors: wan@google.com (Zhanyong Wan)
>//
>// Low-level types and utilities for porting Google Test to various
>// platforms.  All macros ending with _ and symbols defined in an
>// internal namespace are subject to change without notice.  Code
>// outside Google Test MUST NOT USE THEM DIRECTLY.  Macros that don't
>// end with _ are part of Google Test's public API and can be used by
>// code outside Google Test.
>//
>// This file is fundamental to Google Test.  All other Google Test source
>// files are expected to #include this.  Therefore, it cannot #include
>// any other Google Test header.
>
>#ifndef GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
>#define GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
>
>// Environment-describing macros
>// -----------------------------
>//
>// Google Test can be used in many different environments.  Macros in
>// this section tell Google Test what kind of environment it is being
>// used in, such that Google Test can provide environment-specific
>// features and implementations.
>//
>// Google Test tries to automatically detect the properties of its
>// environment, so users usually don't need to worry about these
>// macros.  However, the automatic detection is not perfect.
>// Sometimes it's necessary for a user to define some of the following
>// macros in the build script to override Google Test's decisions.
>//
>// If the user doesn't define a macro in the list, Google Test will
>// provide a default definition.  After this header is #included, all
>// macros in this list will be defined to either 1 or 0.
>//
>// Notes to maintainers:
>//   - Each macro here is a user-tweakable knob; do not grow the list
>//     lightly.
>//   - Use #if to key off these macros.  Don't use #ifdef or "#if
>//     defined(...)", which will not work as these macros are ALWAYS
>//     defined.
>//
>//   GTEST_HAS_CLONE          - Define it to 1/0 to indicate that clone(2)
>//                              is/isn't available.
>//   GTEST_HAS_EXCEPTIONS     - Define it to 1/0 to indicate that exceptions
>//                              are enabled.
>//   GTEST_HAS_GLOBAL_STRING  - Define it to 1/0 to indicate that ::string
>//                              is/isn't available (some systems define
>//                              ::string, which is different to std::string).
>//   GTEST_HAS_GLOBAL_WSTRING - Define it to 1/0 to indicate that ::string
>//                              is/isn't available (some systems define
>//                              ::wstring, which is different to std::wstring).
>//   GTEST_HAS_POSIX_RE       - Define it to 1/0 to indicate that POSIX regular
>//                              expressions are/aren't available.
>//   GTEST_HAS_PTHREAD        - Define it to 1/0 to indicate that <pthread.h>
>//                              is/isn't available.
>//   GTEST_HAS_RTTI           - Define it to 1/0 to indicate that RTTI is/isn't
>//                              enabled.
>//   GTEST_HAS_STD_WSTRING    - Define it to 1/0 to indicate that
>//                              std::wstring does/doesn't work (Google Test can
>//                              be used where std::wstring is unavailable).
>//   GTEST_HAS_TR1_TUPLE      - Define it to 1/0 to indicate tr1::tuple
>//                              is/isn't available.
>//   GTEST_HAS_SEH            - Define it to 1/0 to indicate whether the
>//                              compiler supports Microsoft's "Structured
>//                              Exception Handling".
>//   GTEST_HAS_STREAM_REDIRECTION
>//                            - Define it to 1/0 to indicate whether the
>//                              platform supports I/O stream redirection using
>//                              dup() and dup2().
>//   GTEST_USE_OWN_TR1_TUPLE  - Define it to 1/0 to indicate whether Google
>//                              Test's own tr1 tuple implementation should be
>//                              used.  Unused when the user sets
>//                              GTEST_HAS_TR1_TUPLE to 0.
>//   GTEST_LANG_CXX11         - Define it to 1/0 to indicate that Google Test
>//                              is building in C++11/C++98 mode.
>//   GTEST_LINKED_AS_SHARED_LIBRARY
>//                            - Define to 1 when compiling tests that use
>//                              Google Test as a shared library (known as
>//                              DLL on Windows).
>//   GTEST_CREATE_SHARED_LIBRARY
>//                            - Define to 1 when compiling Google Test itself
>//                              as a shared library.
>
>// Platform-indicating macros
>// --------------------------
>//
>// Macros indicating the platform on which Google Test is being used
>// (a macro is defined to 1 if compiled on the given platform;
>// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
>// defines these macros automatically.  Code outside Google Test MUST
>// NOT define them.
>//
>//   GTEST_OS_AIX      - IBM AIX
>//   GTEST_OS_CYGWIN   - Cygwin
>//   GTEST_OS_FREEBSD  - FreeBSD
>//   GTEST_OS_HPUX     - HP-UX
>//   GTEST_OS_LINUX    - Linux
>//     GTEST_OS_LINUX_ANDROID - Google Android
>//   GTEST_OS_MAC      - Mac OS X
>//     GTEST_OS_IOS    - iOS
>//   GTEST_OS_NACL     - Google Native Client (NaCl)
>//   GTEST_OS_OPENBSD  - OpenBSD
>//   GTEST_OS_QNX      - QNX
>//   GTEST_OS_SOLARIS  - Sun Solaris
>//   GTEST_OS_SYMBIAN  - Symbian
>//   GTEST_OS_WINDOWS  - Windows (Desktop, MinGW, or Mobile)
>//     GTEST_OS_WINDOWS_DESKTOP  - Windows Desktop
>//     GTEST_OS_WINDOWS_MINGW    - MinGW
>//     GTEST_OS_WINDOWS_MOBILE   - Windows Mobile
>//     GTEST_OS_WINDOWS_PHONE    - Windows Phone
>//     GTEST_OS_WINDOWS_RT       - Windows Store App/WinRT
>//   GTEST_OS_ZOS      - z/OS
>//
>// Among the platforms, Cygwin, Linux, Max OS X, and Windows have the
>// most stable support.  Since core members of the Google Test project
>// don't have access to other platforms, support for them may be less
>// stable.  If you notice any problems on your platform, please notify
>// googletestframework@googlegroups.com (patches for fixing them are
>// even more welcome!).
>//
>// It is possible that none of the GTEST_OS_* macros are defined.
>
>// Feature-indicating macros
>// -------------------------
>//
>// Macros indicating which Google Test features are available (a macro
>// is defined to 1 if the corresponding feature is supported;
>// otherwise UNDEFINED -- it's never defined to 0.).  Google Test
>// defines these macros automatically.  Code outside Google Test MUST
>// NOT define them.
>//
>// These macros are public so that portable tests can be written.
>// Such tests typically surround code using a feature with an #if
>// which controls that code.  For example:
>//
>// #if GTEST_HAS_DEATH_TEST
>//   EXPECT_DEATH(DoSomethingDeadly());
>// #endif
>//
>//   GTEST_HAS_COMBINE      - the Combine() function (for value-parameterized
>//                            tests)
>//   GTEST_HAS_DEATH_TEST   - death tests
>//   GTEST_HAS_PARAM_TEST   - value-parameterized tests
>//   GTEST_HAS_TYPED_TEST   - typed tests
>//   GTEST_HAS_TYPED_TEST_P - type-parameterized tests
>//   GTEST_IS_THREADSAFE    - Google Test is thread-safe.
>//   GTEST_USES_POSIX_RE    - enhanced POSIX regex is used. Do not confuse with
>//                            GTEST_HAS_POSIX_RE (see above) which users can
>//                            define themselves.
>//   GTEST_USES_SIMPLE_RE   - our own simple regex is used;
>//                            the above two are mutually exclusive.
>//   GTEST_CAN_COMPARE_NULL - accepts untyped NULL in EXPECT_EQ().
>
>// Misc public macros
>// ------------------
>//
>//   GTEST_FLAG(flag_name)  - references the variable corresponding to
>//                            the given Google Test flag.
>
>// Internal utilities
>// ------------------
>//
>// The following macros and utilities are for Google Test's INTERNAL
>// use only.  Code outside Google Test MUST NOT USE THEM DIRECTLY.
>//
>// Macros for basic C++ coding:
>//   GTEST_AMBIGUOUS_ELSE_BLOCKER_ - for disabling a gcc warning.
>//   GTEST_ATTRIBUTE_UNUSED_  - declares that a class' instances or a
>//                              variable don't have to be used.
>//   GTEST_DISALLOW_ASSIGN_   - disables operator=.
>//   GTEST_DISALLOW_COPY_AND_ASSIGN_ - disables copy ctor and operator=.
>//   GTEST_MUST_USE_RESULT_   - declares that a function's result must be used.
>//   GTEST_INTENTIONAL_CONST_COND_PUSH_ - start code section where MSVC C4127 is
>//                                        suppressed (constant conditional).
>//   GTEST_INTENTIONAL_CONST_COND_POP_  - finish code section where MSVC C4127
>//                                        is suppressed.
>//
>// C++11 feature wrappers:
>//
>//   testing::internal::move  - portability wrapper for std::move.
>//
>// Synchronization:
>//   Mutex, MutexLock, ThreadLocal, GetThreadCount()
>//                            - synchronization primitives.
>//
>// Template meta programming:
>//   is_pointer     - as in TR1; needed on Symbian and IBM XL C/C++ only.
>//   IteratorTraits - partial implementation of std::iterator_traits, which
>//                    is not available in libCstd when compiled with Sun C++.
>//
>// Smart pointers:
>//   scoped_ptr     - as in TR2.
>//
>// Regular expressions:
>//   RE             - a simple regular expression class using the POSIX
>//                    Extended Regular Expression syntax on UNIX-like
>//                    platforms, or a reduced regular exception syntax on
>//                    other platforms, including Windows.
>//
>// Logging:
>//   GTEST_LOG_()   - logs messages at the specified severity level.
>//   LogToStderr()  - directs all log messages to stderr.
>//   FlushInfoLog() - flushes informational log messages.
>//
>// Stdout and stderr capturing:
>//   CaptureStdout()     - starts capturing stdout.
>//   GetCapturedStdout() - stops capturing stdout and returns the captured
>//                         string.
>//   CaptureStderr()     - starts capturing stderr.
>//   GetCapturedStderr() - stops capturing stderr and returns the captured
>//                         string.
>//
>// Integer types:
>//   TypeWithSize   - maps an integer to a int type.
>//   Int32, UInt32, Int64, UInt64, TimeInMillis
>//                  - integers of known sizes.
>//   BiggestInt     - the biggest signed integer type.
>//
>// Command-line utilities:
>//   GTEST_DECLARE_*()  - declares a flag.
>//   GTEST_DEFINE_*()   - defines a flag.
>//   GetInjectableArgvs() - returns the command line as a vector of strings.
>//
>// Environment variable utilities:
>//   GetEnv()             - gets the value of an environment variable.
>//   BoolFromGTestEnv()   - parses a bool environment variable.
>//   Int32FromGTestEnv()  - parses an Int32 environment variable.
>//   StringFromGTestEnv() - parses a string environment variable.
>
>#include <ctype.h>   // for isspace, etc
>#include <stddef.h>  // for ptrdiff_t
>#include <stdlib.h>
>#include <stdio.h>
>#include <string.h>
>#ifndef _WIN32_WCE
># include <sys/types.h>
># include <sys/stat.h>
>#endif  // !_WIN32_WCE
>
>#if defined __APPLE__
># include <AvailabilityMacros.h>
># include <TargetConditionals.h>
>#endif
>
>#include <algorithm>  // NOLINT
>#include <iostream>  // NOLINT
>#include <sstream>  // NOLINT
>#include <string>  // NOLINT
>#include <utility>
>#include <vector>  // NOLINT
>
>//#include "gtest/internal/gtest-port-arch.h"
>//#include "gtest/internal/custom/gtest-port.h"
>
>#if !defined(GTEST_DEV_EMAIL_)
># define GTEST_DEV_EMAIL_ "googletestframework@@googlegroups.com"
># define GTEST_FLAG_PREFIX_ "gtest_"
># define GTEST_FLAG_PREFIX_DASH_ "gtest-"
># define GTEST_FLAG_PREFIX_UPPER_ "GTEST_"
># define GTEST_NAME_ "Google Test"
># define GTEST_PROJECT_URL_ "https://github.com/google/googletest/"
>#endif  // !defined(GTEST_DEV_EMAIL_)
>
>#if !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
># define GTEST_INIT_GOOGLE_TEST_NAME_ "testing::InitGoogleTest"
>#endif  // !defined(GTEST_INIT_GOOGLE_TEST_NAME_)
>
>// Determines the version of gcc that is used to compile this.
>#ifdef __GNUC__
>// 40302 means version 4.3.2.
># define GTEST_GCC_VER_ \
>    (__GNUC__*10000 + __GNUC_MINOR__*100 + __GNUC_PATCHLEVEL__)
>#endif  // __GNUC__
>
>// Macros for disabling Microsoft Visual C++ warnings.
>//
>//   GTEST_DISABLE_MSC_WARNINGS_PUSH_(4800 4385)
>//   /* code that triggers warnings C4800 and C4385 */
>//   GTEST_DISABLE_MSC_WARNINGS_POP_()
>#if _MSC_VER >= 1500
># define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings) \
>    __pragma(warning(push))                        \
>    __pragma(warning(disable: warnings))
># define GTEST_DISABLE_MSC_WARNINGS_POP_()          \
>    __pragma(warning(pop))
>#else
>// Older versions of MSVC don't have __pragma.
># define GTEST_DISABLE_MSC_WARNINGS_PUSH_(warnings)
># define GTEST_DISABLE_MSC_WARNINGS_POP_()
>#endif
>
>#ifndef GTEST_LANG_CXX11
>// gcc and clang define __GXX_EXPERIMENTAL_CXX0X__ when
>// -std={c,gnu}++{0x,11} is passed.  The C++11 standard specifies a
>// value for __cplusplus, and recent versions of clang, gcc, and
>// probably other compilers set that too in C++11 mode.
># if __GXX_EXPERIMENTAL_CXX0X__ || __cplusplus >= 201103L
>// Compiling in at least C++11 mode.
>#  define GTEST_LANG_CXX11 1
># else
>#  define GTEST_LANG_CXX11 0
># endif
>#endif
>
>// Distinct from C++11 language support, some environments don't provide
>// proper C++11 library support. Notably, it's possible to build in
>// C++11 mode when targeting Mac OS X 10.6, which has an old libstdc++
>// with no C++11 support.
>//
>// libstdc++ has sufficient C++11 support as of GCC 4.6.0, __GLIBCXX__
>// 20110325, but maintenance releases in the 4.4 and 4.5 series followed
>// this date, so check for those versions by their date stamps.
>// https://gcc.gnu.org/onlinedocs/libstdc++/manual/abi.html#abi.versioning
>#if GTEST_LANG_CXX11 && \
>    (!defined(__GLIBCXX__) || ( \
>        __GLIBCXX__ >= 20110325ul &&  /* GCC >= 4.6.0 */ \
>        /* Blacklist of patch releases of older branches: */ \
>        __GLIBCXX__ != 20110416ul &&  /* GCC 4.4.6 */ \
>        __GLIBCXX__ != 20120313ul &&  /* GCC 4.4.7 */ \
>        __GLIBCXX__ != 20110428ul &&  /* GCC 4.5.3 */ \
>        __GLIBCXX__ != 20120702ul))   /* GCC 4.5.4 */
># define GTEST_STDLIB_CXX11 1
>#endif
>
>// Only use C++11 library features if the library provides them.
>#if GTEST_STDLIB_CXX11
># define GTEST_HAS_STD_BEGIN_AND_END_ 1
># define GTEST_HAS_STD_FORWARD_LIST_ 1
># define GTEST_HAS_STD_FUNCTION_ 1
># define GTEST_HAS_STD_INITIALIZER_LIST_ 1
># define GTEST_HAS_STD_MOVE_ 1
># define GTEST_HAS_STD_SHARED_PTR_ 1
># define GTEST_HAS_STD_TYPE_TRAITS_ 1
># define GTEST_HAS_STD_UNIQUE_PTR_ 1
>#endif
>
>// C++11 specifies that <tuple> provides std::tuple.
>// Some platforms still might not have it, however.
>#if GTEST_LANG_CXX11
># define GTEST_HAS_STD_TUPLE_ 1
># if defined(__clang__)
>// Inspired by http://clang.llvm.org/docs/LanguageExtensions.html#__has_include
>#  if defined(__has_include) && !__has_include(<tuple>)
>#   undef GTEST_HAS_STD_TUPLE_
>#  endif
># elif defined(_MSC_VER)
>// Inspired by boost/config/stdlib/dinkumware.hpp
>#  if defined(_CPPLIB_VER) && _CPPLIB_VER < 520
>#   undef GTEST_HAS_STD_TUPLE_
>#  endif
># elif defined(__GLIBCXX__)
>// Inspired by boost/config/stdlib/libstdcpp3.hpp,
>// http://gcc.gnu.org/gcc-4.2/changes.html and
>// http://gcc.gnu.org/onlinedocs/libstdc++/manual/bk01pt01ch01.html#manual.intro.status.standard.200x
>#  if __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 2)
>#   undef GTEST_HAS_STD_TUPLE_
>#  endif
># endif
>#endif
>
>// Brings in definitions for functions used in the testing::internal::posix
>// namespace (read, write, close, chdir, isatty, stat). We do not currently
>// use them on Windows Mobile.
>#if GTEST_OS_WINDOWS
># if !GTEST_OS_WINDOWS_MOBILE
>#  include <direct.h>
>#  include <io.h>
># endif
>// In order to avoid having to include <windows.h>, use forward declaration
>// assuming CRITICAL_SECTION is a typedef of _RTL_CRITICAL_SECTION.
>// This assumption is verified by
>// WindowsTypesTest.CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION.
>struct _RTL_CRITICAL_SECTION;
>#else
>// This assumes that non-Windows OSes provide unistd.h. For OSes where this
>// is not the case, we need to include headers that provide the functions
>// mentioned above.
># include <unistd.h>
># include <strings.h>
>#endif  // GTEST_OS_WINDOWS
>
>#if GTEST_OS_LINUX_ANDROID
>// Used to define __ANDROID_API__ matching the target NDK API level.
>#  include <android/api-level.h>  // NOLINT
>#endif
>
>// Defines this to true iff Google Test can use POSIX regular expressions.
>#ifndef GTEST_HAS_POSIX_RE
># if GTEST_OS_LINUX_ANDROID
>// On Android, <regex.h> is only available starting with Gingerbread.
>#  define GTEST_HAS_POSIX_RE (__ANDROID_API__ >= 9)
># else
>#  define GTEST_HAS_POSIX_RE (!GTEST_OS_WINDOWS)
># endif
>#endif
>
>#if GTEST_USES_PCRE
>// The appropriate headers have already been included.
>
>#elif GTEST_HAS_POSIX_RE
>
>// On some platforms, <regex.h> needs someone to define size_t, and
>// won't compile otherwise.  We can #include it here as we already
>// included <stdlib.h>, which is guaranteed to define size_t through
>// <stddef.h>.
># include <regex.h>  // NOLINT
>
># define GTEST_USES_POSIX_RE 1
>
>#elif GTEST_OS_WINDOWS
>
>// <regex.h> is not available on Windows.  Use our own simple regex
>// implementation instead.
># define GTEST_USES_SIMPLE_RE 1
>
>#else
>
>// <regex.h> may not be available on this platform.  Use our own
>// simple regex implementation instead.
># define GTEST_USES_SIMPLE_RE 1
>
>#endif  // GTEST_USES_PCRE
>
>#ifndef GTEST_HAS_EXCEPTIONS
>// The user didn't tell us whether exceptions are enabled, so we need
>// to figure it out.
># if defined(_MSC_VER) || defined(__BORLANDC__)
>// MSVC's and C++Builder's implementations of the STL use the _HAS_EXCEPTIONS
>// macro to enable exceptions, so we'll do the same.
>// Assumes that exceptions are enabled by default.
>#  ifndef _HAS_EXCEPTIONS
>#   define _HAS_EXCEPTIONS 1
>#  endif  // _HAS_EXCEPTIONS
>#  define GTEST_HAS_EXCEPTIONS _HAS_EXCEPTIONS
># elif defined(__clang__)
>// clang defines __EXCEPTIONS iff exceptions are enabled before clang 220714,
>// but iff cleanups are enabled after that. In Obj-C++ files, there can be
>// cleanups for ObjC exceptions which also need cleanups, even if C++ exceptions
>// are disabled. clang has __has_feature(cxx_exceptions) which checks for C++
>// exceptions starting at clang r206352, but which checked for cleanups prior to
>// that. To reliably check for C++ exception availability with clang, check for
>// __EXCEPTIONS && __has_feature(cxx_exceptions).
>#  define GTEST_HAS_EXCEPTIONS (__EXCEPTIONS && __has_feature(cxx_exceptions))
># elif defined(__GNUC__) && __EXCEPTIONS
>// gcc defines __EXCEPTIONS to 1 iff exceptions are enabled.
>#  define GTEST_HAS_EXCEPTIONS 1
># elif defined(__SUNPRO_CC)
>// Sun Pro CC supports exceptions.  However, there is no compile-time way of
>// detecting whether they are enabled or not.  Therefore, we assume that
>// they are enabled unless the user tells us otherwise.
>#  define GTEST_HAS_EXCEPTIONS 1
># elif defined(__IBMCPP__) && __EXCEPTIONS
>// xlC defines __EXCEPTIONS to 1 iff exceptions are enabled.
>#  define GTEST_HAS_EXCEPTIONS 1
># elif defined(__HP_aCC)
>// Exception handling is in effect by default in HP aCC compiler. It has to
>// be turned of by +noeh compiler option if desired.
>#  define GTEST_HAS_EXCEPTIONS 1
># else
>// For other compilers, we assume exceptions are disabled to be
>// conservative.
>#  define GTEST_HAS_EXCEPTIONS 0
># endif  // defined(_MSC_VER) || defined(__BORLANDC__)
>#endif  // GTEST_HAS_EXCEPTIONS
>
>#if !defined(GTEST_HAS_STD_STRING)
>// Even though we don't use this macro any longer, we keep it in case
>// some clients still depend on it.
># define GTEST_HAS_STD_STRING 1
>#elif !GTEST_HAS_STD_STRING
>// The user told us that ::std::string isn't available.
># error "Google Test cannot be used where ::std::string isn't available."
>#endif  // !defined(GTEST_HAS_STD_STRING)
>
>#ifndef GTEST_HAS_GLOBAL_STRING
>// The user didn't tell us whether ::string is available, so we need
>// to figure it out.
>
># define GTEST_HAS_GLOBAL_STRING 0
>
>#endif  // GTEST_HAS_GLOBAL_STRING
>
>#ifndef GTEST_HAS_STD_WSTRING
>// The user didn't tell us whether ::std::wstring is available, so we need
>// to figure it out.
>// TODO(wan@google.com): uses autoconf to detect whether ::std::wstring
>//   is available.
>
>// Cygwin 1.7 and below doesn't support ::std::wstring.
>// Solaris' libc++ doesn't support it either.  Android has
>// no support for it at least as recent as Froyo (2.2).
># define GTEST_HAS_STD_WSTRING \
>    (!(GTEST_OS_LINUX_ANDROID || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS))
>
>#endif  // GTEST_HAS_STD_WSTRING
>
>#ifndef GTEST_HAS_GLOBAL_WSTRING
>// The user didn't tell us whether ::wstring is available, so we need
>// to figure it out.
># define GTEST_HAS_GLOBAL_WSTRING \
>    (GTEST_HAS_STD_WSTRING && GTEST_HAS_GLOBAL_STRING)
>#endif  // GTEST_HAS_GLOBAL_WSTRING
>
>// Determines whether RTTI is available.
>#ifndef GTEST_HAS_RTTI
>// The user didn't tell us whether RTTI is enabled, so we need to
>// figure it out.
>
># ifdef _MSC_VER
>
>#  ifdef _CPPRTTI  // MSVC defines this macro iff RTTI is enabled.
>#   define GTEST_HAS_RTTI 1
>#  else
>#   define GTEST_HAS_RTTI 0
>#  endif
>
>// Starting with version 4.3.2, gcc defines __GXX_RTTI iff RTTI is enabled.
># elif defined(__GNUC__) && (GTEST_GCC_VER_ >= 40302)
>
>#  ifdef __GXX_RTTI
>// When building against STLport with the Android NDK and with
>// -frtti -fno-exceptions, the build fails at link time with undefined
>// references to __cxa_bad_typeid. Note sure if STL or toolchain bug,
>// so disable RTTI when detected.
>#   if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR) && \
>       !defined(__EXCEPTIONS)
>#    define GTEST_HAS_RTTI 0
>#   else
>#    define GTEST_HAS_RTTI 1
>#   endif  // GTEST_OS_LINUX_ANDROID && __STLPORT_MAJOR && !__EXCEPTIONS
>#  else
>#   define GTEST_HAS_RTTI 0
>#  endif  // __GXX_RTTI
>
>// Clang defines __GXX_RTTI starting with version 3.0, but its manual recommends
>// using has_feature instead. has_feature(cxx_rtti) is supported since 2.7, the
>// first version with C++ support.
># elif defined(__clang__)
>
>#  define GTEST_HAS_RTTI __has_feature(cxx_rtti)
>
>// Starting with version 9.0 IBM Visual Age defines __RTTI_ALL__ to 1 if
>// both the typeid and dynamic_cast features are present.
># elif defined(__IBMCPP__) && (__IBMCPP__ >= 900)
>
>#  ifdef __RTTI_ALL__
>#   define GTEST_HAS_RTTI 1
>#  else
>#   define GTEST_HAS_RTTI 0
>#  endif
>
># else
>
>// For all other compilers, we assume RTTI is enabled.
>#  define GTEST_HAS_RTTI 1
>
># endif  // _MSC_VER
>
>#endif  // GTEST_HAS_RTTI
>
>// It's this header's responsibility to #include <typeinfo> when RTTI
>// is enabled.
>#if GTEST_HAS_RTTI
># include <typeinfo>
>#endif
>
>// Determines whether Google Test can use the pthreads library.
>#ifndef GTEST_HAS_PTHREAD
>// The user didn't tell us explicitly, so we make reasonable assumptions about
>// which platforms have pthreads support.
>//
>// To disable threading support in Google Test, add -DGTEST_HAS_PTHREAD=0
>// to your compiler flags.
># define GTEST_HAS_PTHREAD (GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_HPUX \
>    || GTEST_OS_QNX || GTEST_OS_FREEBSD || GTEST_OS_NACL)
>#endif  // GTEST_HAS_PTHREAD
>
>#if GTEST_HAS_PTHREAD
>// gtest-port.h guarantees to #include <pthread.h> when GTEST_HAS_PTHREAD is
>// true.
># include <pthread.h>  // NOLINT
>
>// For timespec and nanosleep, used below.
># include <time.h>  // NOLINT
>#endif
>
>// Determines if hash_map/hash_set are available.
>// Only used for testing against those containers.
>#if !defined(GTEST_HAS_HASH_MAP_)
># if _MSC_VER
>#  define GTEST_HAS_HASH_MAP_ 1  // Indicates that hash_map is available.
>#  define GTEST_HAS_HASH_SET_ 1  // Indicates that hash_set is available.
># endif  // _MSC_VER
>#endif  // !defined(GTEST_HAS_HASH_MAP_)
>
>// Determines whether Google Test can use tr1/tuple.  You can define
>// this macro to 0 to prevent Google Test from using tuple (any
>// feature depending on tuple with be disabled in this mode).
>#ifndef GTEST_HAS_TR1_TUPLE
># if GTEST_OS_LINUX_ANDROID && defined(_STLPORT_MAJOR)
>// STLport, provided with the Android NDK, has neither <tr1/tuple> or <tuple>.
>#  define GTEST_HAS_TR1_TUPLE 0
># else
>// The user didn't tell us not to do it, so we assume it's OK.
>#  define GTEST_HAS_TR1_TUPLE 1
># endif
>#endif  // GTEST_HAS_TR1_TUPLE
>
>// Determines whether Google Test's own tr1 tuple implementation
>// should be used.
>#ifndef GTEST_USE_OWN_TR1_TUPLE
>// The user didn't tell us, so we need to figure it out.
>
>// We use our own TR1 tuple if we aren't sure the user has an
>// implementation of it already.  At this time, libstdc++ 4.0.0+ and
>// MSVC 2010 are the only mainstream standard libraries that come
>// with a TR1 tuple implementation.  NVIDIA's CUDA NVCC compiler
>// pretends to be GCC by defining __GNUC__ and friends, but cannot
>// compile GCC's tuple implementation.  MSVC 2008 (9.0) provides TR1
>// tuple in a 323 MB Feature Pack download, which we cannot assume the
>// user has.  QNX's QCC compiler is a modified GCC but it doesn't
>// support TR1 tuple.  libc++ only provides std::tuple, in C++11 mode,
>// and it can be used with some compilers that define __GNUC__.
># if (defined(__GNUC__) && !defined(__CUDACC__) && (GTEST_GCC_VER_ >= 40000) \
>      && !GTEST_OS_QNX && !defined(_LIBCPP_VERSION)) || _MSC_VER >= 1600
>#  define GTEST_ENV_HAS_TR1_TUPLE_ 1
># endif
>
>// C++11 specifies that <tuple> provides std::tuple. Use that if gtest is used
>// in C++11 mode and libstdc++ isn't very old (binaries targeting OS X 10.6
>// can build with clang but need to use gcc4.2's libstdc++).
># if GTEST_LANG_CXX11 && (!defined(__GLIBCXX__) || __GLIBCXX__ > 20110325)
>#  define GTEST_ENV_HAS_STD_TUPLE_ 1
># endif
>
># if GTEST_ENV_HAS_TR1_TUPLE_ || GTEST_ENV_HAS_STD_TUPLE_
>#  define GTEST_USE_OWN_TR1_TUPLE 0
># else
>#  define GTEST_USE_OWN_TR1_TUPLE 1
># endif
>
>#endif  // GTEST_USE_OWN_TR1_TUPLE
>
>// To avoid conditional compilation everywhere, we make it
>// gtest-port.h's responsibility to #include the header implementing
>// tuple.
>#if GTEST_HAS_STD_TUPLE_
># include <tuple>  // IWYU pragma: export
># define GTEST_TUPLE_NAMESPACE_ ::std
>#endif  // GTEST_HAS_STD_TUPLE_
>
>// We include tr1::tuple even if std::tuple is available to define printers for
>// them.
>#if GTEST_HAS_TR1_TUPLE
># ifndef GTEST_TUPLE_NAMESPACE_
>#  define GTEST_TUPLE_NAMESPACE_ ::std::tr1
># endif  // GTEST_TUPLE_NAMESPACE_
>
># if GTEST_USE_OWN_TR1_TUPLE
>//#  include "gtest/internal/gtest-tuple.h"  // IWYU pragma: export  // NOLINT
># elif GTEST_ENV_HAS_STD_TUPLE_
>#  include <tuple>
>// C++11 puts its tuple into the ::std namespace rather than
>// ::std::tr1.  gtest expects tuple to live in ::std::tr1, so put it there.
>// This causes undefined behavior, but supported compilers react in
>// the way we intend.
>namespace std {
>namespace tr1 {
>using ::std::get;
>using ::std::make_tuple;
>using ::std::tuple;
>using ::std::tuple_element;
>using ::std::tuple_size;
>}
>}
>
># elif GTEST_OS_SYMBIAN
>
>// On Symbian, BOOST_HAS_TR1_TUPLE causes Boost's TR1 tuple library to
>// use STLport's tuple implementation, which unfortunately doesn't
>// work as the copy of STLport distributed with Symbian is incomplete.
>// By making sure BOOST_HAS_TR1_TUPLE is undefined, we force Boost to
>// use its own tuple implementation.
>#  ifdef BOOST_HAS_TR1_TUPLE
>#   undef BOOST_HAS_TR1_TUPLE
>#  endif  // BOOST_HAS_TR1_TUPLE
>
>// This prevents <boost/tr1/detail/config.hpp>, which defines
>// BOOST_HAS_TR1_TUPLE, from being #included by Boost's <tuple>.
>#  define BOOST_TR1_DETAIL_CONFIG_HPP_INCLUDED
>#  include <tuple>  // IWYU pragma: export  // NOLINT
>
># elif defined(__GNUC__) && (GTEST_GCC_VER_ >= 40000)
>// GCC 4.0+ implements tr1/tuple in the <tr1/tuple> header.  This does
>// not conform to the TR1 spec, which requires the header to be <tuple>.
>
>#  if !GTEST_HAS_RTTI && GTEST_GCC_VER_ < 40302
>// Until version 4.3.2, gcc has a bug that causes <tr1/functional>,
>// which is #included by <tr1/tuple>, to not compile when RTTI is
>// disabled.  _TR1_FUNCTIONAL is the header guard for
>// <tr1/functional>.  Hence the following #define is a hack to prevent
>// <tr1/functional> from being included.
>#   define _TR1_FUNCTIONAL 1
>#   include <tr1/tuple>
>#   undef _TR1_FUNCTIONAL  // Allows the user to #include
>                        // <tr1/functional> if he chooses to.
>#  else
>#   include <tr1/tuple>  // NOLINT
>#  endif  // !GTEST_HAS_RTTI && GTEST_GCC_VER_ < 40302
>
># else
>// If the compiler is not GCC 4.0+, we assume the user is using a
>// spec-conforming TR1 implementation.
>#  include <tuple>  // IWYU pragma: export  // NOLINT
># endif  // GTEST_USE_OWN_TR1_TUPLE
>
>#endif  // GTEST_HAS_TR1_TUPLE
>
>// Determines whether clone(2) is supported.
>// Usually it will only be available on Linux, excluding
>// Linux on the Itanium architecture.
>// Also see http://linux.die.net/man/2/clone.
>#ifndef GTEST_HAS_CLONE
>// The user didn't tell us, so we need to figure it out.
>
># if GTEST_OS_LINUX && !defined(__ia64__)
>#  if GTEST_OS_LINUX_ANDROID
>// On Android, clone() is only available on ARM starting with Gingerbread.
>#    if defined(__arm__) && __ANDROID_API__ >= 9
>#     define GTEST_HAS_CLONE 1
>#    else
>#     define GTEST_HAS_CLONE 0
>#    endif
>#  else
>#   define GTEST_HAS_CLONE 1
>#  endif
># else
>#  define GTEST_HAS_CLONE 0
># endif  // GTEST_OS_LINUX && !defined(__ia64__)
>
>#endif  // GTEST_HAS_CLONE
>
>// Determines whether to support stream redirection. This is used to test
>// output correctness and to implement death tests.
>#ifndef GTEST_HAS_STREAM_REDIRECTION
>// By default, we assume that stream redirection is supported on all
>// platforms except known mobile ones.
># if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_SYMBIAN || \
>    GTEST_OS_WINDOWS_PHONE || GTEST_OS_WINDOWS_RT
>#  define GTEST_HAS_STREAM_REDIRECTION 0
># else
>#  define GTEST_HAS_STREAM_REDIRECTION 1
># endif  // !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_SYMBIAN
>#endif  // GTEST_HAS_STREAM_REDIRECTION
>
>// Determines whether to support death tests.
>// Google Test does not support death tests for VC 7.1 and earlier as
>// abort() in a VC 7.1 application compiled as GUI in debug config
>// pops up a dialog window that cannot be suppressed programmatically.
>#if (GTEST_OS_LINUX || GTEST_OS_CYGWIN || GTEST_OS_SOLARIS || \
>     (GTEST_OS_MAC && !GTEST_OS_IOS) || \
>     (GTEST_OS_WINDOWS_DESKTOP && _MSC_VER >= 1400) || \
>     GTEST_OS_WINDOWS_MINGW || GTEST_OS_AIX || GTEST_OS_HPUX || \
>     GTEST_OS_OPENBSD || GTEST_OS_QNX || GTEST_OS_FREEBSD)
># define GTEST_HAS_DEATH_TEST 1
>#endif
>
>// We don't support MSVC 7.1 with exceptions disabled now.  Therefore
>// all the compilers we care about are adequate for supporting
>// value-parameterized tests.
>#define GTEST_HAS_PARAM_TEST 1
>
>// Determines whether to support type-driven tests.
>
>// Typed tests need <typeinfo> and variadic macros, which GCC, VC++ 8.0,
>// Sun Pro CC, IBM Visual Age, and HP aCC support.
>#if defined(__GNUC__) || (_MSC_VER >= 1400) || defined(__SUNPRO_CC) || \
>    defined(__IBMCPP__) || defined(__HP_aCC)
># define GTEST_HAS_TYPED_TEST 1
># define GTEST_HAS_TYPED_TEST_P 1
>#endif
>
>// Determines whether to support Combine(). This only makes sense when
>// value-parameterized tests are enabled.  The implementation doesn't
>// work on Sun Studio since it doesn't understand templated conversion
>// operators.
>#if GTEST_HAS_PARAM_TEST && GTEST_HAS_TR1_TUPLE && !defined(__SUNPRO_CC)
># define GTEST_HAS_COMBINE 1
>#endif
>
>// Determines whether the system compiler uses UTF-16 for encoding wide strings.
>#define GTEST_WIDE_STRING_USES_UTF16_ \
>    (GTEST_OS_WINDOWS || GTEST_OS_CYGWIN || GTEST_OS_SYMBIAN || GTEST_OS_AIX)
>
>// Determines whether test results can be streamed to a socket.
>#if GTEST_OS_LINUX
># define GTEST_CAN_STREAM_RESULTS_ 1
>#endif
>
>// Defines some utility macros.
>
>// The GNU compiler emits a warning if nested "if" statements are followed by
>// an "else" statement and braces are not used to explicitly disambiguate the
>// "else" binding.  This leads to problems with code like:
>//
>//   if (gate)
>//     ASSERT_*(condition) << "Some message";
>//
>// The "switch (0) case 0:" idiom is used to suppress this.
>#ifdef __INTEL_COMPILER
># define GTEST_AMBIGUOUS_ELSE_BLOCKER_
>#else
># define GTEST_AMBIGUOUS_ELSE_BLOCKER_ switch (0) case 0: default:  // NOLINT
>#endif
>
>// Use this annotation at the end of a struct/class definition to
>// prevent the compiler from optimizing away instances that are never
>// used.  This is useful when all interesting logic happens inside the
>// c'tor and / or d'tor.  Example:
>//
>//   struct Foo {
>//     Foo() { ... }
>//   } GTEST_ATTRIBUTE_UNUSED_;
>//
>// Also use it after a variable or parameter declaration to tell the
>// compiler the variable/parameter does not have to be used.
>#if defined(__GNUC__) && !defined(COMPILER_ICC)
># define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
>#elif defined(__clang__)
># if __has_attribute(unused)
>#  define GTEST_ATTRIBUTE_UNUSED_ __attribute__ ((unused))
># endif
>#endif
>#ifndef GTEST_ATTRIBUTE_UNUSED_
># define GTEST_ATTRIBUTE_UNUSED_
>#endif
>
>// A macro to disallow operator=
>// This should be used in the private: declarations for a class.
>#define GTEST_DISALLOW_ASSIGN_(type)\
>  void operator=(type const &)
>
>// A macro to disallow copy constructor and operator=
>// This should be used in the private: declarations for a class.
>#define GTEST_DISALLOW_COPY_AND_ASSIGN_(type)\
>  type(type const &);\
>  GTEST_DISALLOW_ASSIGN_(type)
>
>// Tell the compiler to warn about unused return values for functions declared
>// with this macro.  The macro should be used on function declarations
>// following the argument list:
>//
>//   Sprocket* AllocateSprocket() GTEST_MUST_USE_RESULT_;
>#if defined(__GNUC__) && (GTEST_GCC_VER_ >= 30400) && !defined(COMPILER_ICC)
># define GTEST_MUST_USE_RESULT_ __attribute__ ((warn_unused_result))
>#else
># define GTEST_MUST_USE_RESULT_
>#endif  // __GNUC__ && (GTEST_GCC_VER_ >= 30400) && !COMPILER_ICC
>
>// MS C++ compiler emits warning when a conditional expression is compile time
>// constant. In some contexts this warning is false positive and needs to be
>// suppressed. Use the following two macros in such cases:
>//
>// GTEST_INTENTIONAL_CONST_COND_PUSH_()
>// while (true) {
>// GTEST_INTENTIONAL_CONST_COND_POP_()
>// }
># define GTEST_INTENTIONAL_CONST_COND_PUSH_() \
>    GTEST_DISABLE_MSC_WARNINGS_PUSH_(4127)
># define GTEST_INTENTIONAL_CONST_COND_POP_() \
>    GTEST_DISABLE_MSC_WARNINGS_POP_()
>
>// Determine whether the compiler supports Microsoft's Structured Exception
>// Handling.  This is supported by several Windows compilers but generally
>// does not exist on any other system.
>#ifndef GTEST_HAS_SEH
>// The user didn't tell us, so we need to figure it out.
>
># if defined(_MSC_VER) || defined(__BORLANDC__)
>// These two compilers are known to support SEH.
>#  define GTEST_HAS_SEH 1
># else
>// Assume no SEH.
>#  define GTEST_HAS_SEH 0
># endif
>
>#define GTEST_IS_THREADSAFE \
>    (GTEST_HAS_MUTEX_AND_THREAD_LOCAL_ \
>     || (GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT) \
>     || GTEST_HAS_PTHREAD)
>
>#endif  // GTEST_HAS_SEH
>
>#ifdef _MSC_VER
># if GTEST_LINKED_AS_SHARED_LIBRARY
>#  define GTEST_API_ __declspec(dllimport)
># elif GTEST_CREATE_SHARED_LIBRARY
>#  define GTEST_API_ __declspec(dllexport)
># endif
>#elif __GNUC__ >= 4 || defined(__clang__)
># define GTEST_API_ __attribute__((visibility ("default")))
>#endif // _MSC_VER
>
>#ifndef GTEST_API_
># define GTEST_API_
>#endif
>
>#ifdef __GNUC__
>// Ask the compiler to never inline a given function.
># define GTEST_NO_INLINE_ __attribute__((noinline))
>#else
># define GTEST_NO_INLINE_
>#endif
>
>// _LIBCPP_VERSION is defined by the libc++ library from the LLVM project.
>#if defined(__GLIBCXX__) || defined(_LIBCPP_VERSION)
># define GTEST_HAS_CXXABI_H_ 1
>#else
># define GTEST_HAS_CXXABI_H_ 0
>#endif
>
>// A function level attribute to disable checking for use of uninitialized
>// memory when built with MemorySanitizer.
>#if defined(__clang__)
># if __has_feature(memory_sanitizer)
>#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_ \
>       __attribute__((no_sanitize_memory))
># else
>#  define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
># endif  // __has_feature(memory_sanitizer)
>#else
># define GTEST_ATTRIBUTE_NO_SANITIZE_MEMORY_
>#endif  // __clang__
>
>// A function level attribute to disable AddressSanitizer instrumentation.
>#if defined(__clang__)
># if __has_feature(address_sanitizer)
>#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_ \
>       __attribute__((no_sanitize_address))
># else
>#  define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
># endif  // __has_feature(address_sanitizer)
>#else
># define GTEST_ATTRIBUTE_NO_SANITIZE_ADDRESS_
>#endif  // __clang__
>
>// A function level attribute to disable ThreadSanitizer instrumentation.
>#if defined(__clang__)
># if __has_feature(thread_sanitizer)
>#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_ \
>       __attribute__((no_sanitize_thread))
># else
>#  define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
># endif  // __has_feature(thread_sanitizer)
>#else
># define GTEST_ATTRIBUTE_NO_SANITIZE_THREAD_
>#endif  // __clang__
>
>namespace testing {
>
>class Message;
>
>#if defined(GTEST_TUPLE_NAMESPACE_)
>// Import tuple and friends into the ::testing namespace.
>// It is part of our interface, having them in ::testing allows us to change
>// their types as needed.
>using GTEST_TUPLE_NAMESPACE_::get;
>using GTEST_TUPLE_NAMESPACE_::make_tuple;
>using GTEST_TUPLE_NAMESPACE_::tuple;
>using GTEST_TUPLE_NAMESPACE_::tuple_size;
>using GTEST_TUPLE_NAMESPACE_::tuple_element;
>#endif  // defined(GTEST_TUPLE_NAMESPACE_)
>
>namespace internal {
>
>// A secret type that Google Test users don't know about.  It has no
>// definition on purpose.  Therefore it's impossible to create a
>// Secret object, which is what we want.
>class Secret;
>
>// The GTEST_COMPILE_ASSERT_ macro can be used to verify that a compile time
>// expression is true. For example, you could use it to verify the
>// size of a static array:
>//
>//   GTEST_COMPILE_ASSERT_(GTEST_ARRAY_SIZE_(names) == NUM_NAMES,
>//                         names_incorrect_size);
>//
>// or to make sure a struct is smaller than a certain size:
>//
>//   GTEST_COMPILE_ASSERT_(sizeof(foo) < 128, foo_too_large);
>//
>// The second argument to the macro is the name of the variable. If
>// the expression is false, most compilers will issue a warning/error
>// containing the name of the variable.
>
>#if GTEST_LANG_CXX11
># define GTEST_COMPILE_ASSERT_(expr, msg) static_assert(expr, #msg)
>#else  // !GTEST_LANG_CXX11
>template <bool>
>struct CompileAssert {
>};
>
># define GTEST_COMPILE_ASSERT_(expr, msg) \
>  typedef ::testing::internal::CompileAssert<(static_cast<bool>(expr))> \
>      msg[static_cast<bool>(expr) ? 1 : -1] GTEST_ATTRIBUTE_UNUSED_
>#endif  // !GTEST_LANG_CXX11
>
>// Implementation details of GTEST_COMPILE_ASSERT_:
>//
>// (In C++11, we simply use static_assert instead of the following)
>//
>// - GTEST_COMPILE_ASSERT_ works by defining an array type that has -1
>//   elements (and thus is invalid) when the expression is false.
>//
>// - The simpler definition
>//
>//    #define GTEST_COMPILE_ASSERT_(expr, msg) typedef char msg[(expr) ? 1 : -1]
>//
>//   does not work, as gcc supports variable-length arrays whose sizes
>//   are determined at run-time (this is gcc's extension and not part
>//   of the C++ standard).  As a result, gcc fails to reject the
>//   following code with the simple definition:
>//
>//     int foo;
>//     GTEST_COMPILE_ASSERT_(foo, msg); // not supposed to compile as foo is
>//                                      // not a compile-time constant.
>//
>// - By using the type CompileAssert<(bool(expr))>, we ensures that
>//   expr is a compile-time constant.  (Template arguments must be
>//   determined at compile-time.)
>//
>// - The outter parentheses in CompileAssert<(bool(expr))> are necessary
>//   to work around a bug in gcc 3.4.4 and 4.0.1.  If we had written
>//
>//     CompileAssert<bool(expr)>
>//
>//   instead, these compilers will refuse to compile
>//
>//     GTEST_COMPILE_ASSERT_(5 > 0, some_message);
>//
>//   (They seem to think the ">" in "5 > 0" marks the end of the
>//   template argument list.)
>//
>// - The array size is (bool(expr) ? 1 : -1), instead of simply
>//
>//     ((expr) ? 1 : -1).
>//
>//   This is to avoid running into a bug in MS VC 7.1, which
>//   causes ((0.0) ? 1 : -1) to incorrectly evaluate to 1.
>
>// StaticAssertTypeEqHelper is used by StaticAssertTypeEq defined in gtest.h.
>//
>// This template is declared, but intentionally undefined.
>template <typename T1, typename T2>
>struct StaticAssertTypeEqHelper;
>
>template <typename T>
>struct StaticAssertTypeEqHelper<T, T> {
>  enum { value = true };
>};
>
>// Evaluates to the number of elements in 'array'.
>#define GTEST_ARRAY_SIZE_(array) (sizeof(array) / sizeof(array[0]))
>
>#if GTEST_HAS_GLOBAL_STRING
>typedef ::string string;
>#else
>typedef ::std::string string;
>#endif  // GTEST_HAS_GLOBAL_STRING
>
>#if GTEST_HAS_GLOBAL_WSTRING
>typedef ::wstring wstring;
>#elif GTEST_HAS_STD_WSTRING
>typedef ::std::wstring wstring;
>#endif  // GTEST_HAS_GLOBAL_WSTRING
>
>// A helper for suppressing warnings on constant condition.  It just
>// returns 'condition'.
>GTEST_API_ bool IsTrue(bool condition);
>
>// Defines scoped_ptr.
>
>// This implementation of scoped_ptr is PARTIAL - it only contains
>// enough stuff to satisfy Google Test's need.
>template <typename T>
>class scoped_ptr {
>public:
>  typedef T element_type;
>
>  explicit scoped_ptr(T* p = NULL) : ptr_(p) {}
>  ~scoped_ptr() { reset(); }
>
>  T& operator*() const { return *ptr_; }
>  T* operator->() const { return ptr_; }
>  T* get() const { return ptr_; }
>
>  T* release() {
>    T* const ptr = ptr_;
>    ptr_ = NULL;
>    return ptr;
>  }
>
>  void reset(T* p = NULL) {
>    if (p != ptr_) {
>      if (IsTrue(sizeof(T) > 0)) {  // Makes sure T is a complete type.
>        delete ptr_;
>      }
>      ptr_ = p;
>    }
>  }
>
>  friend void swap(scoped_ptr& a, scoped_ptr& b) {
>    using std::swap;
>    swap(a.ptr_, b.ptr_);
>  }
>
>private:
>  T* ptr_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(scoped_ptr);
>};
>
>// Defines RE.
>
>// A simple C++ wrapper for <regex.h>.  It uses the POSIX Extended
>// Regular Expression syntax.
>class GTEST_API_ RE {
>public:
>  // A copy constructor is required by the Standard to initialize object
>  // references from r-values.
>  RE(const RE& other) { Init(other.pattern()); }
>
>  // Constructs an RE from a string.
>  RE(const ::std::string& regex) { Init(regex.c_str()); }  // NOLINT
>
>#if GTEST_HAS_GLOBAL_STRING
>
>  RE(const ::string& regex) { Init(regex.c_str()); }  // NOLINT
>
>#endif  // GTEST_HAS_GLOBAL_STRING
>
>  RE(const char* regex) { Init(regex); }  // NOLINT
>  ~RE();
>
>  // Returns the string representation of the regex.
>  const char* pattern() const { return pattern_; }
>
>  // FullMatch(str, re) returns true iff regular expression re matches
>  // the entire str.
>  // PartialMatch(str, re) returns true iff regular expression re
>  // matches a substring of str (including str itself).
>  //
>  // TODO(wan@google.com): make FullMatch() and PartialMatch() work
>  // when str contains NUL characters.
>  static bool FullMatch(const ::std::string& str, const RE& re) {
>    return FullMatch(str.c_str(), re);
>  }
>  static bool PartialMatch(const ::std::string& str, const RE& re) {
>    return PartialMatch(str.c_str(), re);
>  }
>
>#if GTEST_HAS_GLOBAL_STRING
>
>  static bool FullMatch(const ::string& str, const RE& re) {
>    return FullMatch(str.c_str(), re);
>  }
>  static bool PartialMatch(const ::string& str, const RE& re) {
>    return PartialMatch(str.c_str(), re);
>  }
>
>#endif  // GTEST_HAS_GLOBAL_STRING
>
>  static bool FullMatch(const char* str, const RE& re);
>  static bool PartialMatch(const char* str, const RE& re);
>
>private:
>  void Init(const char* regex);
>
>  // We use a const char* instead of an std::string, as Google Test used to be
>  // used where std::string is not available.  TODO(wan@google.com): change to
>  // std::string.
>  const char* pattern_;
>  bool is_valid_;
>
>#if GTEST_USES_POSIX_RE
>
>  regex_t full_regex_;     // For FullMatch().
>  regex_t partial_regex_;  // For PartialMatch().
>
>#else  // GTEST_USES_SIMPLE_RE
>
>  const char* full_pattern_;  // For FullMatch();
>
>#endif
>
>  GTEST_DISALLOW_ASSIGN_(RE);
>};
>
>// Formats a source file path and a line number as they would appear
>// in an error message from the compiler used to compile this code.
>GTEST_API_ ::std::string FormatFileLocation(const char* file, int line);
>
>// Formats a file location for compiler-independent XML output.
>// Although this function is not platform dependent, we put it next to
>// FormatFileLocation in order to contrast the two functions.
>GTEST_API_ ::std::string FormatCompilerIndependentFileLocation(const char* file,
>                                                               int line);
>
>// Defines logging utilities:
>//   GTEST_LOG_(severity) - logs messages at the specified severity level. The
>//                          message itself is streamed into the macro.
>//   LogToStderr()  - directs all log messages to stderr.
>//   FlushInfoLog() - flushes informational log messages.
>
>enum GTestLogSeverity {
>  GTEST_INFO,
>  GTEST_WARNING,
>  GTEST_ERROR,
>  GTEST_FATAL
>};
>
>// Formats log entry severity, provides a stream object for streaming the
>// log message, and terminates the message with a newline when going out of
>// scope.
>class GTEST_API_ GTestLog {
>public:
>  GTestLog(GTestLogSeverity severity, const char* file, int line);
>
>  // Flushes the buffers and, if severity is GTEST_FATAL, aborts the program.
>  ~GTestLog();
>
>  ::std::ostream& GetStream() { return ::std::cerr; }
>
>private:
>  const GTestLogSeverity severity_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestLog);
>};
>
>#if !defined(GTEST_LOG_)
>
># define GTEST_LOG_(severity) \
>    ::testing::internal::GTestLog(::testing::internal::GTEST_##severity, \
>                                  __FILE__, __LINE__).GetStream()
>
>inline void LogToStderr() {}
>inline void FlushInfoLog() { fflush(NULL); }
>
>#endif  // !defined(GTEST_LOG_)
>
>#if !defined(GTEST_CHECK_)
>// INTERNAL IMPLEMENTATION - DO NOT USE.
>//
>// GTEST_CHECK_ is an all-mode assert. It aborts the program if the condition
>// is not satisfied.
>//  Synopsys:
>//    GTEST_CHECK_(boolean_condition);
>//     or
>//    GTEST_CHECK_(boolean_condition) << "Additional message";
>//
>//    This checks the condition and if the condition is not satisfied
>//    it prints message about the condition violation, including the
>//    condition itself, plus additional message streamed into it, if any,
>//    and then it aborts the program. It aborts the program irrespective of
>//    whether it is built in the debug mode or not.
># define GTEST_CHECK_(condition) \
>    GTEST_AMBIGUOUS_ELSE_BLOCKER_ \
>    if (::testing::internal::IsTrue(condition)) \
>      ; \
>    else \
>      GTEST_LOG_(FATAL) << "Condition " #condition " failed. "
>#endif  // !defined(GTEST_CHECK_)
>
>// An all-mode assert to verify that the given POSIX-style function
>// call returns 0 (indicating success).  Known limitation: this
>// doesn't expand to a balanced 'if' statement, so enclose the macro
>// in {} if you need to use it as the only statement in an 'if'
>// branch.
>#define GTEST_CHECK_POSIX_SUCCESS_(posix_call) \
>  if (const int gtest_error = (posix_call)) \
>    GTEST_LOG_(FATAL) << #posix_call << "failed with error " \
>                      << gtest_error
>
>#if GTEST_HAS_STD_MOVE_
>using std::move;
>#else  // GTEST_HAS_STD_MOVE_
>template <typename T>
>const T& move(const T& t) {
>  return t;
>}
>#endif  // GTEST_HAS_STD_MOVE_
>
>// INTERNAL IMPLEMENTATION - DO NOT USE IN USER CODE.
>//
>// Use ImplicitCast_ as a safe version of static_cast for upcasting in
>// the type hierarchy (e.g. casting a Foo* to a SuperclassOfFoo* or a
>// const Foo*).  When you use ImplicitCast_, the compiler checks that
>// the cast is safe.  Such explicit ImplicitCast_s are necessary in
>// surprisingly many situations where C++ demands an exact type match
>// instead of an argument type convertable to a target type.
>//
>// The syntax for using ImplicitCast_ is the same as for static_cast:
>//
>//   ImplicitCast_<ToType>(expr)
>//
>// ImplicitCast_ would have been part of the C++ standard library,
>// but the proposal was submitted too late.  It will probably make
>// its way into the language in the future.
>//
>// This relatively ugly name is intentional. It prevents clashes with
>// similar functions users may have (e.g., implicit_cast). The internal
>// namespace alone is not enough because the function can be found by ADL.
>template<typename To>
>inline To ImplicitCast_(To x) { return x; }
>
>// When you upcast (that is, cast a pointer from type Foo to type
>// SuperclassOfFoo), it's fine to use ImplicitCast_<>, since upcasts
>// always succeed.  When you downcast (that is, cast a pointer from
>// type Foo to type SubclassOfFoo), static_cast<> isn't safe, because
>// how do you know the pointer is really of type SubclassOfFoo?  It
>// could be a bare Foo, or of type DifferentSubclassOfFoo.  Thus,
>// when you downcast, you should use this macro.  In debug mode, we
>// use dynamic_cast<> to double-check the downcast is legal (we die
>// if it's not).  In normal mode, we do the efficient static_cast<>
>// instead.  Thus, it's important to test in debug mode to make sure
>// the cast is legal!
>//    This is the only place in the code we should use dynamic_cast<>.
>// In particular, you SHOULDN'T be using dynamic_cast<> in order to
>// do RTTI (eg code like this:
>//    if (dynamic_cast<Subclass1>(foo)) HandleASubclass1Object(foo);
>//    if (dynamic_cast<Subclass2>(foo)) HandleASubclass2Object(foo);
>// You should design the code some other way not to need this.
>//
>// This relatively ugly name is intentional. It prevents clashes with
>// similar functions users may have (e.g., down_cast). The internal
>// namespace alone is not enough because the function can be found by ADL.
>template<typename To, typename From>  // use like this: DownCast_<T*>(foo);
>inline To DownCast_(From* f) {  // so we only accept pointers
>  // Ensures that To is a sub-type of From *.  This test is here only
>  // for compile-time type checking, and has no overhead in an
>  // optimized build at run-time, as it will be optimized away
>  // completely.
>  GTEST_INTENTIONAL_CONST_COND_PUSH_()
>  if (false) {
>    GTEST_INTENTIONAL_CONST_COND_POP_()
>    const To to = NULL;
>    ::testing::internal::ImplicitCast_<From*>(to);
>  }
>
>#if GTEST_HAS_RTTI
>  // RTTI: debug mode only!
>  GTEST_CHECK_(f == NULL || dynamic_cast<To>(f) != NULL);
>#endif
>  return static_cast<To>(f);
>}
>
>// Downcasts the pointer of type Base to Derived.
>// Derived must be a subclass of Base. The parameter MUST
>// point to a class of type Derived, not any subclass of it.
>// When RTTI is available, the function performs a runtime
>// check to enforce this.
>template <class Derived, class Base>
>Derived* CheckedDowncastToActualType(Base* base) {
>#if GTEST_HAS_RTTI
>  GTEST_CHECK_(typeid(*base) == typeid(Derived));
>#endif
>
>#if GTEST_HAS_DOWNCAST_
>  return ::down_cast<Derived*>(base);
>#elif GTEST_HAS_RTTI
>  return dynamic_cast<Derived*>(base);  // NOLINT
>#else
>  return static_cast<Derived*>(base);  // Poor man's downcast.
>#endif
>}
>
>#if GTEST_HAS_STREAM_REDIRECTION
>
>// Defines the stderr capturer:
>//   CaptureStdout     - starts capturing stdout.
>//   GetCapturedStdout - stops capturing stdout and returns the captured string.
>//   CaptureStderr     - starts capturing stderr.
>//   GetCapturedStderr - stops capturing stderr and returns the captured string.
>//
>GTEST_API_ void CaptureStdout();
>GTEST_API_ std::string GetCapturedStdout();
>GTEST_API_ void CaptureStderr();
>GTEST_API_ std::string GetCapturedStderr();
>
>#endif  // GTEST_HAS_STREAM_REDIRECTION
>
>// Returns a path to temporary directory.
>GTEST_API_ std::string TempDir();
>
>// Returns the size (in bytes) of a file.
>GTEST_API_ size_t GetFileSize(FILE* file);
>
>// Reads the entire content of a file as a string.
>GTEST_API_ std::string ReadEntireFile(FILE* file);
>
>// All command line arguments.
>GTEST_API_ const ::std::vector<testing::internal::string>& GetArgvs();
>
>#if GTEST_HAS_DEATH_TEST
>
>const ::std::vector<testing::internal::string>& GetInjectableArgvs();
>void SetInjectableArgvs(const ::std::vector<testing::internal::string>*
>                             new_argvs);
>
>
>#endif  // GTEST_HAS_DEATH_TEST
>
>// Defines synchronization primitives.
>#if GTEST_IS_THREADSAFE
># if GTEST_HAS_PTHREAD
>// Sleeps for (roughly) n milliseconds.  This function is only for testing
>// Google Test's own constructs.  Don't use it in user tests, either
>// directly or indirectly.
>inline void SleepMilliseconds(int n) {
>  const timespec time = {
>    0,                  // 0 seconds.
>    n * 1000L * 1000L,  // And n ms.
>  };
>  nanosleep(&time, NULL);
>}
># endif  // GTEST_HAS_PTHREAD
>
># if GTEST_HAS_NOTIFICATION_
>// Notification has already been imported into the namespace.
>// Nothing to do here.
>
># elif GTEST_HAS_PTHREAD
>// Allows a controller thread to pause execution of newly created
>// threads until notified.  Instances of this class must be created
>// and destroyed in the controller thread.
>//
>// This class is only for testing Google Test's own constructs. Do not
>// use it in user tests, either directly or indirectly.
>class Notification {
> public:
>  Notification() : notified_(false) {
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, NULL));
>  }
>  ~Notification() {
>    pthread_mutex_destroy(&mutex_);
>  }
>
>  // Notifies all threads created with this notification to start. Must
>  // be called from the controller thread.
>  void Notify() {
>    pthread_mutex_lock(&mutex_);
>    notified_ = true;
>    pthread_mutex_unlock(&mutex_);
>  }
>
>  // Blocks until the controller thread notifies. Must be called from a test
>  // thread.
>  void WaitForNotification() {
>    for (;;) {
>      pthread_mutex_lock(&mutex_);
>      const bool notified = notified_;
>      pthread_mutex_unlock(&mutex_);
>      if (notified)
>        break;
>      SleepMilliseconds(10);
>    }
>  }
>
> private:
>  pthread_mutex_t mutex_;
>  bool notified_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
>};
>
># elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
>
>GTEST_API_ void SleepMilliseconds(int n);
>
>// Provides leak-safe Windows kernel handle ownership.
>// Used in death tests and in threading support.
>class GTEST_API_ AutoHandle {
> public:
>  // Assume that Win32 HANDLE type is equivalent to void*. Doing so allows us to
>  // avoid including <windows.h> in this header file. Including <windows.h> is
>  // undesirable because it defines a lot of symbols and macros that tend to
>  // conflict with client code. This assumption is verified by
>  // WindowsTypesTest.HANDLEIsVoidStar.
>  typedef void* Handle;
>  AutoHandle();
>  explicit AutoHandle(Handle handle);
>
>  ~AutoHandle();
>
>  Handle Get() const;
>  void Reset();
>  void Reset(Handle handle);
>
> private:
>  // Returns true iff the handle is a valid handle object that can be closed.
>  bool IsCloseable() const;
>
>  Handle handle_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(AutoHandle);
>};
>
>// Allows a controller thread to pause execution of newly created
>// threads until notified.  Instances of this class must be created
>// and destroyed in the controller thread.
>//
>// This class is only for testing Google Test's own constructs. Do not
>// use it in user tests, either directly or indirectly.
>class GTEST_API_ Notification {
> public:
>  Notification();
>  void Notify();
>  void WaitForNotification();
>
> private:
>  AutoHandle event_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(Notification);
>};
># endif  // GTEST_HAS_NOTIFICATION_
>
>// On MinGW, we can have both GTEST_OS_WINDOWS and GTEST_HAS_PTHREAD
>// defined, but we don't want to use MinGW's pthreads implementation, which
>// has conformance problems with some versions of the POSIX standard.
># if GTEST_HAS_PTHREAD && !GTEST_OS_WINDOWS_MINGW
>
>// As a C-function, ThreadFuncWithCLinkage cannot be templated itself.
>// Consequently, it cannot select a correct instantiation of ThreadWithParam
>// in order to call its Run(). Introducing ThreadWithParamBase as a
>// non-templated base class for ThreadWithParam allows us to bypass this
>// problem.
>class ThreadWithParamBase {
> public:
>  virtual ~ThreadWithParamBase() {}
>  virtual void Run() = 0;
>};
>
>// pthread_create() accepts a pointer to a function type with the C linkage.
>// According to the Standard (7.5/1), function types with different linkages
>// are different even if they are otherwise identical.  Some compilers (for
>// example, SunStudio) treat them as different types.  Since class methods
>// cannot be defined with C-linkage we need to define a free C-function to
>// pass into pthread_create().
>extern "C" inline void* ThreadFuncWithCLinkage(void* thread) {
>  static_cast<ThreadWithParamBase*>(thread)->Run();
>  return NULL;
>}
>
>// Helper class for testing Google Test's multi-threading constructs.
>// To use it, write:
>//
>//   void ThreadFunc(int param) { /* Do things with param */ }
>//   Notification thread_can_start;
>//   ...
>//   // The thread_can_start parameter is optional; you can supply NULL.
>//   ThreadWithParam<int> thread(&ThreadFunc, 5, &thread_can_start);
>//   thread_can_start.Notify();
>//
>// These classes are only for testing Google Test's own constructs. Do
>// not use them in user tests, either directly or indirectly.
>template <typename T>
>class ThreadWithParam : public ThreadWithParamBase {
> public:
>  typedef void UserThreadFunc(T);
>
>  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
>      : func_(func),
>        param_(param),
>        thread_can_start_(thread_can_start),
>        finished_(false) {
>    ThreadWithParamBase* const base = this;
>    // The thread can be created only after all fields except thread_
>    // have been initialized.
>    GTEST_CHECK_POSIX_SUCCESS_(
>        pthread_create(&thread_, 0, &ThreadFuncWithCLinkage, base));
>  }
>  ~ThreadWithParam() { Join(); }
>
>  void Join() {
>    if (!finished_) {
>      GTEST_CHECK_POSIX_SUCCESS_(pthread_join(thread_, 0));
>      finished_ = true;
>    }
>  }
>
>  virtual void Run() {
>    if (thread_can_start_ != NULL)
>      thread_can_start_->WaitForNotification();
>    func_(param_);
>  }
>
> private:
>  UserThreadFunc* const func_;  // User-supplied thread function.
>  const T param_;  // User-supplied parameter to the thread function.
>  // When non-NULL, used to block execution until the controller thread
>  // notifies.
>  Notification* const thread_can_start_;
>  bool finished_;  // true iff we know that the thread function has finished.
>  pthread_t thread_;  // The native thread object.
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
>};
># endif  // !GTEST_OS_WINDOWS && GTEST_HAS_PTHREAD ||
>         // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
>
># if GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
>// Mutex and ThreadLocal have already been imported into the namespace.
>// Nothing to do here.
>
># elif GTEST_OS_WINDOWS && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
>
>// Mutex implements mutex on Windows platforms.  It is used in conjunction
>// with class MutexLock:
>//
>//   Mutex mutex;
>//   ...
>//   MutexLock lock(&mutex);  // Acquires the mutex and releases it at the
>//                            // end of the current scope.
>//
>// A static Mutex *must* be defined or declared using one of the following
>// macros:
>//   GTEST_DEFINE_STATIC_MUTEX_(g_some_mutex);
>//   GTEST_DECLARE_STATIC_MUTEX_(g_some_mutex);
>//
>// (A non-static Mutex is defined/declared in the usual way).
>class GTEST_API_ Mutex {
> public:
>  enum MutexType { kStatic = 0, kDynamic = 1 };
>  // We rely on kStaticMutex being 0 as it is to what the linker initializes
>  // type_ in static mutexes.  critical_section_ will be initialized lazily
>  // in ThreadSafeLazyInit().
>  enum StaticConstructorSelector { kStaticMutex = 0 };
>
>  // This constructor intentionally does nothing.  It relies on type_ being
>  // statically initialized to 0 (effectively setting it to kStatic) and on
>  // ThreadSafeLazyInit() to lazily initialize the rest of the members.
>  explicit Mutex(StaticConstructorSelector /*dummy*/) {}
>
>  Mutex();
>  ~Mutex();
>
>  void Lock();
>
>  void Unlock();
>
>  // Does nothing if the current thread holds the mutex. Otherwise, crashes
>  // with high probability.
>  void AssertHeld();
>
> private:
>  // Initializes owner_thread_id_ and critical_section_ in static mutexes.
>  void ThreadSafeLazyInit();
>
>  // Per http://blogs.msdn.com/b/oldnewthing/archive/2004/02/23/78395.aspx,
>  // we assume that 0 is an invalid value for thread IDs.
>  unsigned int owner_thread_id_;
>
>  // For static mutexes, we rely on these members being initialized to zeros
>  // by the linker.
>  MutexType type_;
>  long critical_section_init_phase_;  // NOLINT
>  _RTL_CRITICAL_SECTION* critical_section_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
>};
>
># define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
>    extern ::testing::internal::Mutex mutex
>
># define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
>    ::testing::internal::Mutex mutex(::testing::internal::Mutex::kStaticMutex)
>
>// We cannot name this class MutexLock because the ctor declaration would
>// conflict with a macro named MutexLock, which is defined on some
>// platforms. That macro is used as a defensive measure to prevent against
>// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
>// "MutexLock l(&mu)".  Hence the typedef trick below.
>class GTestMutexLock {
> public:
>  explicit GTestMutexLock(Mutex* mutex)
>      : mutex_(mutex) { mutex_->Lock(); }
>
>  ~GTestMutexLock() { mutex_->Unlock(); }
>
> private:
>  Mutex* const mutex_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
>};
>
>typedef GTestMutexLock MutexLock;
>
>// Base class for ValueHolder<T>.  Allows a caller to hold and delete a value
>// without knowing its type.
>class ThreadLocalValueHolderBase {
> public:
>  virtual ~ThreadLocalValueHolderBase() {}
>};
>
>// Provides a way for a thread to send notifications to a ThreadLocal
>// regardless of its parameter type.
>class ThreadLocalBase {
> public:
>  // Creates a new ValueHolder<T> object holding a default value passed to
>  // this ThreadLocal<T>'s constructor and returns it.  It is the caller's
>  // responsibility not to call this when the ThreadLocal<T> instance already
>  // has a value on the current thread.
>  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const = 0;
>
> protected:
>  ThreadLocalBase() {}
>  virtual ~ThreadLocalBase() {}
>
> private:
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocalBase);
>};
>
>// Maps a thread to a set of ThreadLocals that have values instantiated on that
>// thread and notifies them when the thread exits.  A ThreadLocal instance is
>// expected to persist until all threads it has values on have terminated.
>class GTEST_API_ ThreadLocalRegistry {
> public:
>  // Registers thread_local_instance as having value on the current thread.
>  // Returns a value that can be used to identify the thread from other threads.
>  static ThreadLocalValueHolderBase* GetValueOnCurrentThread(
>      const ThreadLocalBase* thread_local_instance);
>
>  // Invoked when a ThreadLocal instance is destroyed.
>  static void OnThreadLocalDestroyed(
>      const ThreadLocalBase* thread_local_instance);
>};
>
>class GTEST_API_ ThreadWithParamBase {
> public:
>  void Join();
>
> protected:
>  class Runnable {
>   public:
>    virtual ~Runnable() {}
>    virtual void Run() = 0;
>  };
>
>  ThreadWithParamBase(Runnable *runnable, Notification* thread_can_start);
>  virtual ~ThreadWithParamBase();
>
> private:
>  AutoHandle thread_;
>};
>
>// Helper class for testing Google Test's multi-threading constructs.
>template <typename T>
>class ThreadWithParam : public ThreadWithParamBase {
> public:
>  typedef void UserThreadFunc(T);
>
>  ThreadWithParam(UserThreadFunc* func, T param, Notification* thread_can_start)
>      : ThreadWithParamBase(new RunnableImpl(func, param), thread_can_start) {
>  }
>  virtual ~ThreadWithParam() {}
>
> private:
>  class RunnableImpl : public Runnable {
>   public:
>    RunnableImpl(UserThreadFunc* func, T param)
>        : func_(func),
>          param_(param) {
>    }
>    virtual ~RunnableImpl() {}
>    virtual void Run() {
>      func_(param_);
>    }
>
>   private:
>    UserThreadFunc* const func_;
>    const T param_;
>
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(RunnableImpl);
>  };
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadWithParam);
>};
>
>// Implements thread-local storage on Windows systems.
>//
>//   // Thread 1
>//   ThreadLocal<int> tl(100);  // 100 is the default value for each thread.
>//
>//   // Thread 2
>//   tl.set(150);  // Changes the value for thread 2 only.
>//   EXPECT_EQ(150, tl.get());
>//
>//   // Thread 1
>//   EXPECT_EQ(100, tl.get());  // In thread 1, tl has the original value.
>//   tl.set(200);
>//   EXPECT_EQ(200, tl.get());
>//
>// The template type argument T must have a public copy constructor.
>// In addition, the default ThreadLocal constructor requires T to have
>// a public default constructor.
>//
>// The users of a TheadLocal instance have to make sure that all but one
>// threads (including the main one) using that instance have exited before
>// destroying it. Otherwise, the per-thread objects managed for them by the
>// ThreadLocal instance are not guaranteed to be destroyed on all platforms.
>//
>// Google Test only uses global ThreadLocal objects.  That means they
>// will die after main() has returned.  Therefore, no per-thread
>// object managed by Google Test will be leaked as long as all threads
>// using Google Test have exited when main() returns.
>template <typename T>
>class ThreadLocal : public ThreadLocalBase {
> public:
>  ThreadLocal() : default_factory_(new DefaultValueHolderFactory()) {}
>  explicit ThreadLocal(const T& value)
>      : default_factory_(new InstanceValueHolderFactory(value)) {}
>
>  ~ThreadLocal() { ThreadLocalRegistry::OnThreadLocalDestroyed(this); }
>
>  T* pointer() { return GetOrCreateValue(); }
>  const T* pointer() const { return GetOrCreateValue(); }
>  const T& get() const { return *pointer(); }
>  void set(const T& value) { *pointer() = value; }
>
> private:
>  // Holds a value of T.  Can be deleted via its base class without the caller
>  // knowing the type of T.
>  class ValueHolder : public ThreadLocalValueHolderBase {
>   public:
>    ValueHolder() : value_() {}
>    explicit ValueHolder(const T& value) : value_(value) {}
>
>    T* pointer() { return &value_; }
>
>   private:
>    T value_;
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
>  };
>
>
>  T* GetOrCreateValue() const {
>    return static_cast<ValueHolder*>(
>        ThreadLocalRegistry::GetValueOnCurrentThread(this))->pointer();
>  }
>
>  virtual ThreadLocalValueHolderBase* NewValueForCurrentThread() const {
>    return default_factory_->MakeNewHolder();
>  }
>
>  class ValueHolderFactory {
>   public:
>    ValueHolderFactory() {}
>    virtual ~ValueHolderFactory() {}
>    virtual ValueHolder* MakeNewHolder() const = 0;
>
>   private:
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
>  };
>
>  class DefaultValueHolderFactory : public ValueHolderFactory {
>   public:
>    DefaultValueHolderFactory() {}
>    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
>
>   private:
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
>  };
>
>  class InstanceValueHolderFactory : public ValueHolderFactory {
>   public:
>    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
>    virtual ValueHolder* MakeNewHolder() const {
>      return new ValueHolder(value_);
>    }
>
>   private:
>    const T value_;  // The value for each thread.
>
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
>  };
>
>  scoped_ptr<ValueHolderFactory> default_factory_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
>};
>
># elif GTEST_HAS_PTHREAD
>
>// MutexBase and Mutex implement mutex on pthreads-based platforms.
>class MutexBase {
> public:
>  // Acquires this mutex.
>  void Lock() {
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&mutex_));
>    owner_ = pthread_self();
>    has_owner_ = true;
>  }
>
>  // Releases this mutex.
>  void Unlock() {
>    // Since the lock is being released the owner_ field should no longer be
>    // considered valid. We don't protect writing to has_owner_ here, as it's
>    // the caller's responsibility to ensure that the current thread holds the
>    // mutex when this is called.
>    has_owner_ = false;
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&mutex_));
>  }
>
>  // Does nothing if the current thread holds the mutex. Otherwise, crashes
>  // with high probability.
>  void AssertHeld() const {
>    GTEST_CHECK_(has_owner_ && pthread_equal(owner_, pthread_self()))
>        << "The current thread is not holding the mutex @" << this;
>  }
>
>  // A static mutex may be used before main() is entered.  It may even
>  // be used before the dynamic initialization stage.  Therefore we
>  // must be able to initialize a static mutex object at link time.
>  // This means MutexBase has to be a POD and its member variables
>  // have to be public.
> public:
>  pthread_mutex_t mutex_;  // The underlying pthread mutex.
>  // has_owner_ indicates whether the owner_ field below contains a valid thread
>  // ID and is therefore safe to inspect (e.g., to use in pthread_equal()). All
>  // accesses to the owner_ field should be protected by a check of this field.
>  // An alternative might be to memset() owner_ to all zeros, but there's no
>  // guarantee that a zero'd pthread_t is necessarily invalid or even different
>  // from pthread_self().
>  bool has_owner_;
>  pthread_t owner_;  // The thread holding the mutex.
>};
>
>// Forward-declares a static mutex.
>#  define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
>     extern ::testing::internal::MutexBase mutex
>
>// Defines and statically (i.e. at link time) initializes a static mutex.
>#  define GTEST_DEFINE_STATIC_MUTEX_(mutex) \
>     ::testing::internal::MutexBase mutex = { PTHREAD_MUTEX_INITIALIZER, false, pthread_t() }
>
>// The Mutex class can only be used for mutexes created at runtime. It
>// shares its API with MutexBase otherwise.
>class Mutex : public MutexBase {
> public:
>  Mutex() {
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_init(&mutex_, NULL));
>    has_owner_ = false;
>  }
>  ~Mutex() {
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&mutex_));
>  }
>
> private:
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(Mutex);
>};
>
>// We cannot name this class MutexLock because the ctor declaration would
>// conflict with a macro named MutexLock, which is defined on some
>// platforms. That macro is used as a defensive measure to prevent against
>// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
>// "MutexLock l(&mu)".  Hence the typedef trick below.
>class GTestMutexLock {
> public:
>  explicit GTestMutexLock(MutexBase* mutex)
>      : mutex_(mutex) { mutex_->Lock(); }
>
>  ~GTestMutexLock() { mutex_->Unlock(); }
>
> private:
>  MutexBase* const mutex_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(GTestMutexLock);
>};
>
>typedef GTestMutexLock MutexLock;
>
>// Helpers for ThreadLocal.
>
>// pthread_key_create() requires DeleteThreadLocalValue() to have
>// C-linkage.  Therefore it cannot be templatized to access
>// ThreadLocal<T>.  Hence the need for class
>// ThreadLocalValueHolderBase.
>class ThreadLocalValueHolderBase {
> public:
>  virtual ~ThreadLocalValueHolderBase() {}
>};
>
>// Called by pthread to delete thread-local data stored by
>// pthread_setspecific().
>extern "C" inline void DeleteThreadLocalValue(void* value_holder) {
>  delete static_cast<ThreadLocalValueHolderBase*>(value_holder);
>}
>
>// Implements thread-local storage on pthreads-based systems.
>template <typename T>
>class ThreadLocal {
> public:
>  ThreadLocal()
>      : key_(CreateKey()), default_factory_(new DefaultValueHolderFactory()) {}
>  explicit ThreadLocal(const T& value)
>      : key_(CreateKey()),
>        default_factory_(new InstanceValueHolderFactory(value)) {}
>
>  ~ThreadLocal() {
>    // Destroys the managed object for the current thread, if any.
>    DeleteThreadLocalValue(pthread_getspecific(key_));
>
>    // Releases resources associated with the key.  This will *not*
>    // delete managed objects for other threads.
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_key_delete(key_));
>  }
>
>  T* pointer() { return GetOrCreateValue(); }
>  const T* pointer() const { return GetOrCreateValue(); }
>  const T& get() const { return *pointer(); }
>  void set(const T& value) { *pointer() = value; }
>
> private:
>  // Holds a value of type T.
>  class ValueHolder : public ThreadLocalValueHolderBase {
>   public:
>    ValueHolder() : value_() {}
>    explicit ValueHolder(const T& value) : value_(value) {}
>
>    T* pointer() { return &value_; }
>
>   private:
>    T value_;
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolder);
>  };
>
>  static pthread_key_t CreateKey() {
>    pthread_key_t key;
>    // When a thread exits, DeleteThreadLocalValue() will be called on
>    // the object managed for that thread.
>    GTEST_CHECK_POSIX_SUCCESS_(
>        pthread_key_create(&key, &DeleteThreadLocalValue));
>    return key;
>  }
>
>  T* GetOrCreateValue() const {
>    ThreadLocalValueHolderBase* const holder =
>        static_cast<ThreadLocalValueHolderBase*>(pthread_getspecific(key_));
>    if (holder != NULL) {
>      return CheckedDowncastToActualType<ValueHolder>(holder)->pointer();
>    }
>
>    ValueHolder* const new_holder = default_factory_->MakeNewHolder();
>    ThreadLocalValueHolderBase* const holder_base = new_holder;
>    GTEST_CHECK_POSIX_SUCCESS_(pthread_setspecific(key_, holder_base));
>    return new_holder->pointer();
>  }
>
>  class ValueHolderFactory {
>   public:
>    ValueHolderFactory() {}
>    virtual ~ValueHolderFactory() {}
>    virtual ValueHolder* MakeNewHolder() const = 0;
>
>   private:
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(ValueHolderFactory);
>  };
>
>  class DefaultValueHolderFactory : public ValueHolderFactory {
>   public:
>    DefaultValueHolderFactory() {}
>    virtual ValueHolder* MakeNewHolder() const { return new ValueHolder(); }
>
>   private:
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(DefaultValueHolderFactory);
>  };
>
>  class InstanceValueHolderFactory : public ValueHolderFactory {
>   public:
>    explicit InstanceValueHolderFactory(const T& value) : value_(value) {}
>    virtual ValueHolder* MakeNewHolder() const {
>      return new ValueHolder(value_);
>    }
>
>   private:
>    const T value_;  // The value for each thread.
>
>    GTEST_DISALLOW_COPY_AND_ASSIGN_(InstanceValueHolderFactory);
>  };
>
>  // A key pthreads uses for looking up per-thread values.
>  const pthread_key_t key_;
>  scoped_ptr<ValueHolderFactory> default_factory_;
>
>  GTEST_DISALLOW_COPY_AND_ASSIGN_(ThreadLocal);
>};
>
># endif  // GTEST_HAS_MUTEX_AND_THREAD_LOCAL_
>
>#else  // GTEST_IS_THREADSAFE
>
>// A dummy implementation of synchronization primitives (mutex, lock,
>// and thread-local variable).  Necessary for compiling Google Test where
>// mutex is not supported - using Google Test in multiple threads is not
>// supported on such platforms.
>
>class Mutex {
>public:
>  Mutex() {}
>  void Lock() {}
>  void Unlock() {}
>  void AssertHeld() const {}
>};
>
># define GTEST_DECLARE_STATIC_MUTEX_(mutex) \
>  extern ::testing::internal::Mutex mutex
>
># define GTEST_DEFINE_STATIC_MUTEX_(mutex) ::testing::internal::Mutex mutex
>
>// We cannot name this class MutexLock because the ctor declaration would
>// conflict with a macro named MutexLock, which is defined on some
>// platforms. That macro is used as a defensive measure to prevent against
>// inadvertent misuses of MutexLock like "MutexLock(&mu)" rather than
>// "MutexLock l(&mu)".  Hence the typedef trick below.
>class GTestMutexLock {
>public:
>  explicit GTestMutexLock(Mutex*) {}  // NOLINT
>};
>
>typedef GTestMutexLock MutexLock;
>
>template <typename T>
>class ThreadLocal {
>public:
>  ThreadLocal() : value_() {}
>  explicit ThreadLocal(const T& value) : value_(value) {}
>  T* pointer() { return &value_; }
>  const T* pointer() const { return &value_; }
>  const T& get() const { return value_; }
>  void set(const T& value) { value_ = value; }
>private:
>  T value_;
>};
>
>#endif  // GTEST_IS_THREADSAFE
>
>// Returns the number of threads running in the process, or 0 to indicate that
>// we cannot detect it.
>GTEST_API_ size_t GetThreadCount();
>
>// Passing non-POD classes through ellipsis (...) crashes the ARM
>// compiler and generates a warning in Sun Studio.  The Nokia Symbian
>// and the IBM XL C/C++ compiler try to instantiate a copy constructor
>// for objects passed through ellipsis (...), failing for uncopyable
>// objects.  We define this to ensure that only POD is passed through
>// ellipsis on these systems.
>#if defined(__SYMBIAN32__) || defined(__IBMCPP__) || defined(__SUNPRO_CC)
>// We lose support for NULL detection where the compiler doesn't like
>// passing non-POD classes through ellipsis (...).
># define GTEST_ELLIPSIS_NEEDS_POD_ 1
>#else
># define GTEST_CAN_COMPARE_NULL 1
>#endif
>
>// The Nokia Symbian and IBM XL C/C++ compilers cannot decide between
>// const T& and const T* in a function template.  These compilers
>// _can_ decide between class template specializations for T and T*,
>// so a tr1::type_traits-like is_pointer works.
>#if defined(__SYMBIAN32__) || defined(__IBMCPP__)
># define GTEST_NEEDS_IS_POINTER_ 1
>#endif
>
>template <bool bool_value>
>struct bool_constant {
>  typedef bool_constant<bool_value> type;
>  static const bool value = bool_value;
>};
>template <bool bool_value> const bool bool_constant<bool_value>::value;
>
>typedef bool_constant<false> false_type;
>typedef bool_constant<true> true_type;
>
>template <typename T>
>struct is_pointer : public false_type {};
>
>template <typename T>
>struct is_pointer<T*> : public true_type {};
>
>template <typename Iterator>
>struct IteratorTraits {
>  typedef typename Iterator::value_type value_type;
>};
>
>template <typename T>
>struct IteratorTraits<T*> {
>  typedef T value_type;
>};
>
>template <typename T>
>struct IteratorTraits<const T*> {
>  typedef T value_type;
>};
>
>#if GTEST_OS_WINDOWS
># define GTEST_PATH_SEP_ "\\"
># define GTEST_HAS_ALT_PATH_SEP_ 1
>// The biggest signed integer type the compiler supports.
>typedef __int64 BiggestInt;
>#else
># define GTEST_PATH_SEP_ "/"
># define GTEST_HAS_ALT_PATH_SEP_ 0
>typedef long long BiggestInt;  // NOLINT
>#endif  // GTEST_OS_WINDOWS
>
>// Utilities for char.
>
>// isspace(int ch) and friends accept an unsigned char or EOF.  char
>// may be signed, depending on the compiler (or compiler flags).
>// Therefore we need to cast a char to unsigned char before calling
>// isspace(), etc.
>
>inline bool IsAlpha(char ch) {
>  return isalpha(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsAlNum(char ch) {
>  return isalnum(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsDigit(char ch) {
>  return isdigit(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsLower(char ch) {
>  return islower(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsSpace(char ch) {
>  return isspace(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsUpper(char ch) {
>  return isupper(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsXDigit(char ch) {
>  return isxdigit(static_cast<unsigned char>(ch)) != 0;
>}
>inline bool IsXDigit(wchar_t ch) {
>  const unsigned char low_byte = static_cast<unsigned char>(ch);
>  return ch == low_byte && isxdigit(low_byte) != 0;
>}
>
>inline char ToLower(char ch) {
>  return static_cast<char>(tolower(static_cast<unsigned char>(ch)));
>}
>inline char ToUpper(char ch) {
>  return static_cast<char>(toupper(static_cast<unsigned char>(ch)));
>}
>
>inline std::string StripTrailingSpaces(std::string str) {
>  std::string::iterator it = str.end();
>  while (it != str.begin() && IsSpace(*--it))
>    it = str.erase(it);
>  return str;
>}
>
>// The testing::internal::posix namespace holds wrappers for common
>// POSIX functions.  These wrappers hide the differences between
>// Windows/MSVC and POSIX systems.  Since some compilers define these
>// standard functions as macros, the wrapper cannot have the same name
>// as the wrapped function.
>
>namespace posix {
>
>// Functions with a different name on Windows.
>
>#if GTEST_OS_WINDOWS
>
>typedef struct _stat StatStruct;
>
># ifdef __BORLANDC__
>inline int IsATTY(int fd) { return isatty(fd); }
>inline int StrCaseCmp(const char* s1, const char* s2) {
>  return stricmp(s1, s2);
>}
>inline char* StrDup(const char* src) { return strdup(src); }
># else  // !__BORLANDC__
>#  if GTEST_OS_WINDOWS_MOBILE
>inline int IsATTY(int /* fd */) { return 0; }
>#  else
>inline int IsATTY(int fd) { return _isatty(fd); }
>#  endif  // GTEST_OS_WINDOWS_MOBILE
>inline int StrCaseCmp(const char* s1, const char* s2) {
>  return _stricmp(s1, s2);
>}
>inline char* StrDup(const char* src) { return _strdup(src); }
># endif  // __BORLANDC__
>
># if GTEST_OS_WINDOWS_MOBILE
>inline int FileNo(FILE* file) { return reinterpret_cast<int>(_fileno(file)); }
>// Stat(), RmDir(), and IsDir() are not needed on Windows CE at this
>// time and thus not defined there.
># else
>inline int FileNo(FILE* file) { return _fileno(file); }
>inline int Stat(const char* path, StatStruct* buf) { return _stat(path, buf); }
>inline int RmDir(const char* dir) { return _rmdir(dir); }
>inline bool IsDir(const StatStruct& st) {
>  return (_S_IFDIR & st.st_mode) != 0;
>}
># endif  // GTEST_OS_WINDOWS_MOBILE
>
>#else
>
>typedef struct stat StatStruct;
>
>inline int FileNo(FILE* file) { return fileno(file); }
>inline int IsATTY(int fd) { return isatty(fd); }
>inline int Stat(const char* path, StatStruct* buf) { return stat(path, buf); }
>inline int StrCaseCmp(const char* s1, const char* s2) {
>  return strcasecmp(s1, s2);
>}
>inline char* StrDup(const char* src) { return strdup(src); }
>inline int RmDir(const char* dir) { return rmdir(dir); }
>inline bool IsDir(const StatStruct& st) { return S_ISDIR(st.st_mode); }
>
>#endif  // GTEST_OS_WINDOWS
>
>// Functions deprecated by MSVC 8.0.
>
>GTEST_DISABLE_MSC_WARNINGS_PUSH_(4996 /* deprecated function */)
>
>inline const char* StrNCpy(char* dest, const char* src, size_t n) {
>  return strncpy(dest, src, n);
>}
>
>// ChDir(), FReopen(), FDOpen(), Read(), Write(), Close(), and
>// StrError() aren't needed on Windows CE at this time and thus not
>// defined there.
>
>#if !GTEST_OS_WINDOWS_MOBILE && !GTEST_OS_WINDOWS_PHONE && !GTEST_OS_WINDOWS_RT
>inline int ChDir(const char* dir) { return chdir(dir); }
>#endif
>inline FILE* FOpen(const char* path, const char* mode) {
>  return fopen(path, mode);
>}
>#if !GTEST_OS_WINDOWS_MOBILE
>inline FILE *FReopen(const char* path, const char* mode, FILE* stream) {
>  return freopen(path, mode, stream);
>}
>inline FILE* FDOpen(int fd, const char* mode) { return fdopen(fd, mode); }
>#endif
>inline int FClose(FILE* fp) { return fclose(fp); }
>#if !GTEST_OS_WINDOWS_MOBILE
>inline int Read(int fd, void* buf, unsigned int count) {
>  return static_cast<int>(read(fd, buf, count));
>}
>inline int Write(int fd, const void* buf, unsigned int count) {
>  return static_cast<int>(write(fd, buf, count));
>}
>inline int Close(int fd) { return close(fd); }
>inline const char* StrError(int errnum) { return strerror(errnum); }
>#endif
>inline const char* GetEnv(const char* name) {
>#if GTEST_OS_WINDOWS_MOBILE || GTEST_OS_WINDOWS_PHONE | GTEST_OS_WINDOWS_RT
>  // We are on Windows CE, which has no environment variables.
>  static_cast<void>(name);  // To prevent 'unused argument' warning.
>  return NULL;
>#elif defined(__BORLANDC__) || defined(__SunOS_5_8) || defined(__SunOS_5_9)
>  // Environment variables which we programmatically clear will be set to the
>  // empty string rather than unset (NULL).  Handle that case.
>  const char* const env = getenv(name);
>  return (env != NULL && env[0] != '\0') ? env : NULL;
>#else
>  return getenv(name);
>#endif
>}
>
>GTEST_DISABLE_MSC_WARNINGS_POP_()
>
>#if GTEST_OS_WINDOWS_MOBILE
>// Windows CE has no C library. The abort() function is used in
>// several places in Google Test. This implementation provides a reasonable
>// imitation of standard behaviour.
>void Abort();
>#else
>inline void Abort() { abort(); }
>#endif  // GTEST_OS_WINDOWS_MOBILE
>
>}  // namespace posix
>
>// MSVC "deprecates" snprintf and issues warnings wherever it is used.  In
>// order to avoid these warnings, we need to use _snprintf or _snprintf_s on
>// MSVC-based platforms.  We map the GTEST_SNPRINTF_ macro to the appropriate
>// function in order to achieve that.  We use macro definition here because
>// snprintf is a variadic function.
>#if _MSC_VER >= 1400 && !GTEST_OS_WINDOWS_MOBILE
>// MSVC 2005 and above support variadic macros.
># define GTEST_SNPRINTF_(buffer, size, format, ...) \
>     _snprintf_s(buffer, size, size, format, __VA_ARGS__)
>#elif defined(_MSC_VER)
>// Windows CE does not define _snprintf_s and MSVC prior to 2005 doesn't
>// complain about _snprintf.
># define GTEST_SNPRINTF_ _snprintf
>#else
># define GTEST_SNPRINTF_ snprintf
>#endif
>
>// The maximum number a BiggestInt can represent.  This definition
>// works no matter BiggestInt is represented in one's complement or
>// two's complement.
>//
>// We cannot rely on numeric_limits in STL, as __int64 and long long
>// are not part of standard C++ and numeric_limits doesn't need to be
>// defined for them.
>const BiggestInt kMaxBiggestInt =
>  ~(static_cast<BiggestInt>(1) << (8*sizeof(BiggestInt) - 1));
>
>// This template class serves as a compile-time function from size to
>// type.  It maps a size in bytes to a primitive type with that
>// size. e.g.
>//
>//   TypeWithSize<4>::UInt
>//
>// is typedef-ed to be unsigned int (unsigned integer made up of 4
>// bytes).
>//
>// Such functionality should belong to STL, but I cannot find it
>// there.
>//
>// Google Test uses this class in the implementation of floating-point
>// comparison.
>//
>// For now it only handles UInt (unsigned int) as that's all Google Test
>// needs.  Other types can be easily added in the future if need
>// arises.
>template <size_t size>
>class TypeWithSize {
>public:
>  // This prevents the user from using TypeWithSize<N> with incorrect
>  // values of N.
>  typedef void UInt;
>};
>
>// The specialization for size 4.
>template <>
>class TypeWithSize<4> {
>public:
>  // unsigned int has size 4 in both gcc and MSVC.
>  //
>  // As base/basictypes.h doesn't compile on Windows, we cannot use
>  // uint32, uint64, and etc here.
>  typedef int Int;
>  typedef unsigned int UInt;
>};
>
>// The specialization for size 8.
>template <>
>class TypeWithSize<8> {
>public:
>#if GTEST_OS_WINDOWS
>  typedef __int64 Int;
>  typedef unsigned __int64 UInt;
>#else
>  typedef long long Int;  // NOLINT
>  typedef unsigned long long UInt;  // NOLINT
>#endif  // GTEST_OS_WINDOWS
>};
>
>// Integer types of known sizes.
>typedef TypeWithSize<4>::Int Int32;
>typedef TypeWithSize<4>::UInt UInt32;
>typedef TypeWithSize<8>::Int Int64;
>typedef TypeWithSize<8>::UInt UInt64;
>typedef TypeWithSize<8>::Int TimeInMillis;  // Represents time in milliseconds.
>
>// Utilities for command line flags and environment variables.
>
>// Macro for referencing flags.
>#if !defined(GTEST_FLAG)
># define GTEST_FLAG(name) FLAGS_gtest_##name
>#endif  // !defined(GTEST_FLAG)
>
>#if !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
># define GTEST_USE_OWN_FLAGFILE_FLAG_ 1
>#endif  // !defined(GTEST_USE_OWN_FLAGFILE_FLAG_)
>
>#if !defined(GTEST_DECLARE_bool_)
># define GTEST_FLAG_SAVER_ ::testing::internal::GTestFlagSaver
>
>// Macros for declaring flags.
># define GTEST_DECLARE_bool_(name) GTEST_API_ extern bool GTEST_FLAG(name)
># define GTEST_DECLARE_int32_(name) \
>    GTEST_API_ extern ::testing::internal::Int32 GTEST_FLAG(name)
>#define GTEST_DECLARE_string_(name) \
>    GTEST_API_ extern ::std::string GTEST_FLAG(name)
>
>// Macros for defining flags.
>#define GTEST_DEFINE_bool_(name, default_val, doc) \
>    GTEST_API_ bool GTEST_FLAG(name) = (default_val)
>#define GTEST_DEFINE_int32_(name, default_val, doc) \
>    GTEST_API_ ::testing::internal::Int32 GTEST_FLAG(name) = (default_val)
>#define GTEST_DEFINE_string_(name, default_val, doc) \
>    GTEST_API_ ::std::string GTEST_FLAG(name) = (default_val)
>
>#endif  // !defined(GTEST_DECLARE_bool_)
>
>// Thread annotations
>#if !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
># define GTEST_EXCLUSIVE_LOCK_REQUIRED_(locks)
># define GTEST_LOCK_EXCLUDED_(locks)
>#endif  // !defined(GTEST_EXCLUSIVE_LOCK_REQUIRED_)
>
>// Parses 'str' for a 32-bit signed integer.  If successful, writes the result
>// to *value and returns true; otherwise leaves *value unchanged and returns
>// false.
>// TODO(chandlerc): Find a better way to refactor flag and environment parsing
>// out of both gtest-port.cc and gtest.cc to avoid exporting this utility
>// function.
>bool ParseInt32(const Message& src_text, const char* str, Int32* value);
>
>// Parses a bool/Int32/string from the environment variable
>// corresponding to the given Google Test flag.
>bool BoolFromGTestEnv(const char* flag, bool default_val);
>GTEST_API_ Int32 Int32FromGTestEnv(const char* flag, Int32 default_val);
>std::string StringFromGTestEnv(const char* flag, const char* default_val);
>
>}  // namespace internal
>}  // namespace testing
>
>#endif  // GTEST_INCLUDE_GTEST_INTERNAL_GTEST_PORT_H_
>
>//---------------------------------
>
>
>
>
>
>
>
>
>//----------------------------------
>
>
>// #ifdef __GNUC__ is too general here.  It is possible to use gcc without using
>// libstdc++ (which is where cxxabi.h comes from).
># if GTEST_HAS_CXXABI_H_
>#  include <cxxabi.h>
># elif defined(__HP_aCC)
>#  include <acxx_demangle.h>
># endif  // GTEST_HASH_CXXABI_H_
>
>
>namespace testing {
>namespace internal {
>
>// GetTypeName<T>() returns a human-readable name of type T.
>// NB: This function is also used in Google Mock, so don't move it inside of
>// the typed-test-only section below.
>template <typename T>
>std::string GetTypeName() {
># if GTEST_HAS_RTTI
>
>  const char* const name = typeid(T).name();
>#  if GTEST_HAS_CXXABI_H_ || defined(__HP_aCC)
>  int status = 0;
>  // gcc's implementation of typeid(T).name() mangles the type name,
>  // so we have to demangle it.
>#   if GTEST_HAS_CXXABI_H_
>  using abi::__cxa_demangle;
>#   endif  // GTEST_HAS_CXXABI_H_
>  char* const readable_name = __cxa_demangle(name, 0, 0, &status);
>  const std::string name_str(status == 0 ? readable_name : name);
>  free(readable_name);
>  return name_str;
>#  else
>  return name;
>#  endif  // GTEST_HAS_CXXABI_H_ || __HP_aCC
>
># else
>
>  return "<type>";
>
># endif  // GTEST_HAS_RTTI
>}
>
>#if GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
>
>// AssertyTypeEq<T1, T2>::type is defined iff T1 and T2 are the same
>// type.  This can be used as a compile-time assertion to ensure that
>// two types are equal.
>
>template <typename T1, typename T2>
>struct AssertTypeEq;
>
>template <typename T>
>struct AssertTypeEq<T, T> {
>  typedef bool type;
>};
>
>// A unique type used as the default value for the arguments of class
>// template Types.  This allows us to simulate variadic templates
>// (e.g. Types<int>, Type<int, double>, and etc), which C++ doesn't
>// support directly.
>struct None {};
>
>// The following family of struct and struct templates are used to
>// represent type lists.  In particular, TypesN<T1, T2, ..., TN>
>// represents a type list with N types (T1, T2, ..., and TN) in it.
>// Except for Types0, every struct in the family has two member types:
>// Head for the first type in the list, and Tail for the rest of the
>// list.
>
>// The empty type list.
>struct Types0 {};
>
>// Type lists of length 1, 2, 3, and so on.
>
>template <typename T1>
>struct Types1 {
>  typedef T1 Head;
>  typedef Types0 Tail;
>};
>template <typename T1, typename T2>
>struct Types2 {
>  typedef T1 Head;
>  typedef Types1<T2> Tail;
>};
>
>template <typename T1, typename T2, typename T3>
>struct Types3 {
>  typedef T1 Head;
>  typedef Types2<T2, T3> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4>
>struct Types4 {
>  typedef T1 Head;
>  typedef Types3<T2, T3, T4> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5>
>struct Types5 {
>  typedef T1 Head;
>  typedef Types4<T2, T3, T4, T5> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6>
>struct Types6 {
>  typedef T1 Head;
>  typedef Types5<T2, T3, T4, T5, T6> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7>
>struct Types7 {
>  typedef T1 Head;
>  typedef Types6<T2, T3, T4, T5, T6, T7> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8>
>struct Types8 {
>  typedef T1 Head;
>  typedef Types7<T2, T3, T4, T5, T6, T7, T8> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9>
>struct Types9 {
>  typedef T1 Head;
>  typedef Types8<T2, T3, T4, T5, T6, T7, T8, T9> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10>
>struct Types10 {
>  typedef T1 Head;
>  typedef Types9<T2, T3, T4, T5, T6, T7, T8, T9, T10> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11>
>struct Types11 {
>  typedef T1 Head;
>  typedef Types10<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12>
>struct Types12 {
>  typedef T1 Head;
>  typedef Types11<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13>
>struct Types13 {
>  typedef T1 Head;
>  typedef Types12<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14>
>struct Types14 {
>  typedef T1 Head;
>  typedef Types13<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15>
>struct Types15 {
>  typedef T1 Head;
>  typedef Types14<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
>      T15> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16>
>struct Types16 {
>  typedef T1 Head;
>  typedef Types15<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17>
>struct Types17 {
>  typedef T1 Head;
>  typedef Types16<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18>
>struct Types18 {
>  typedef T1 Head;
>  typedef Types17<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19>
>struct Types19 {
>  typedef T1 Head;
>  typedef Types18<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20>
>struct Types20 {
>  typedef T1 Head;
>  typedef Types19<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21>
>struct Types21 {
>  typedef T1 Head;
>  typedef Types20<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22>
>struct Types22 {
>  typedef T1 Head;
>  typedef Types21<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23>
>struct Types23 {
>  typedef T1 Head;
>  typedef Types22<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24>
>struct Types24 {
>  typedef T1 Head;
>  typedef Types23<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25>
>struct Types25 {
>  typedef T1 Head;
>  typedef Types24<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26>
>struct Types26 {
>  typedef T1 Head;
>  typedef Types25<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27>
>struct Types27 {
>  typedef T1 Head;
>  typedef Types26<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28>
>struct Types28 {
>  typedef T1 Head;
>  typedef Types27<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29>
>struct Types29 {
>  typedef T1 Head;
>  typedef Types28<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
>      T29> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30>
>struct Types30 {
>  typedef T1 Head;
>  typedef Types29<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31>
>struct Types31 {
>  typedef T1 Head;
>  typedef Types30<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32>
>struct Types32 {
>  typedef T1 Head;
>  typedef Types31<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33>
>struct Types33 {
>  typedef T1 Head;
>  typedef Types32<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34>
>struct Types34 {
>  typedef T1 Head;
>  typedef Types33<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35>
>struct Types35 {
>  typedef T1 Head;
>  typedef Types34<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36>
>struct Types36 {
>  typedef T1 Head;
>  typedef Types35<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37>
>struct Types37 {
>  typedef T1 Head;
>  typedef Types36<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38>
>struct Types38 {
>  typedef T1 Head;
>  typedef Types37<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39>
>struct Types39 {
>  typedef T1 Head;
>  typedef Types38<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40>
>struct Types40 {
>  typedef T1 Head;
>  typedef Types39<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41>
>struct Types41 {
>  typedef T1 Head;
>  typedef Types40<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42>
>struct Types42 {
>  typedef T1 Head;
>  typedef Types41<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43>
>struct Types43 {
>  typedef T1 Head;
>  typedef Types42<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42,
>      T43> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44>
>struct Types44 {
>  typedef T1 Head;
>  typedef Types43<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45>
>struct Types45 {
>  typedef T1 Head;
>  typedef Types44<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44, T45> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46>
>struct Types46 {
>  typedef T1 Head;
>  typedef Types45<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44, T45, T46> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47>
>struct Types47 {
>  typedef T1 Head;
>  typedef Types46<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44, T45, T46, T47> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47, typename T48>
>struct Types48 {
>  typedef T1 Head;
>  typedef Types47<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44, T45, T46, T47, T48> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47, typename T48, typename T49>
>struct Types49 {
>  typedef T1 Head;
>  typedef Types48<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44, T45, T46, T47, T48, T49> Tail;
>};
>
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47, typename T48, typename T49, typename T50>
>struct Types50 {
>  typedef T1 Head;
>  typedef Types49<T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>      T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>      T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>      T44, T45, T46, T47, T48, T49, T50> Tail;
>};
>
>
>}  // namespace internal
>
>// We don't want to require the users to write TypesN<...> directly,
>// as that would require them to count the length.  Types<...> is much
>// easier to write, but generates horrible messages when there is a
>// compiler error, as gcc insists on printing out each template
>// argument, even if it has the default value (this means Types<int>
>// will appear as Types<int, None, None, ..., None> in the compiler
>// errors).
>//
>// Our solution is to combine the best part of the two approaches: a
>// user would write Types<T1, ..., TN>, and Google Test will translate
>// that to TypesN<T1, ..., TN> internally to make error messages
>// readable.  The translation is done by the 'type' member of the
>// Types template.
>template <typename T1 = internal::None, typename T2 = internal::None,
>    typename T3 = internal::None, typename T4 = internal::None,
>    typename T5 = internal::None, typename T6 = internal::None,
>    typename T7 = internal::None, typename T8 = internal::None,
>    typename T9 = internal::None, typename T10 = internal::None,
>    typename T11 = internal::None, typename T12 = internal::None,
>    typename T13 = internal::None, typename T14 = internal::None,
>    typename T15 = internal::None, typename T16 = internal::None,
>    typename T17 = internal::None, typename T18 = internal::None,
>    typename T19 = internal::None, typename T20 = internal::None,
>    typename T21 = internal::None, typename T22 = internal::None,
>    typename T23 = internal::None, typename T24 = internal::None,
>    typename T25 = internal::None, typename T26 = internal::None,
>    typename T27 = internal::None, typename T28 = internal::None,
>    typename T29 = internal::None, typename T30 = internal::None,
>    typename T31 = internal::None, typename T32 = internal::None,
>    typename T33 = internal::None, typename T34 = internal::None,
>    typename T35 = internal::None, typename T36 = internal::None,
>    typename T37 = internal::None, typename T38 = internal::None,
>    typename T39 = internal::None, typename T40 = internal::None,
>    typename T41 = internal::None, typename T42 = internal::None,
>    typename T43 = internal::None, typename T44 = internal::None,
>    typename T45 = internal::None, typename T46 = internal::None,
>    typename T47 = internal::None, typename T48 = internal::None,
>    typename T49 = internal::None, typename T50 = internal::None>
>struct Types {
>  typedef internal::Types50<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44, T45, T46, T47, T48, T49, T50> type;
>};
>
>template <>
>struct Types<internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types0 type;
>};
>template <typename T1>
>struct Types<T1, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types1<T1> type;
>};
>template <typename T1, typename T2>
>struct Types<T1, T2, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types2<T1, T2> type;
>};
>template <typename T1, typename T2, typename T3>
>struct Types<T1, T2, T3, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types3<T1, T2, T3> type;
>};
>template <typename T1, typename T2, typename T3, typename T4>
>struct Types<T1, T2, T3, T4, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types4<T1, T2, T3, T4> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5>
>struct Types<T1, T2, T3, T4, T5, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types5<T1, T2, T3, T4, T5> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6>
>struct Types<T1, T2, T3, T4, T5, T6, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types6<T1, T2, T3, T4, T5, T6> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7>
>struct Types<T1, T2, T3, T4, T5, T6, T7, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types7<T1, T2, T3, T4, T5, T6, T7> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types8<T1, T2, T3, T4, T5, T6, T7, T8> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types9<T1, T2, T3, T4, T5, T6, T7, T8, T9> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types10<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types11<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types12<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11,
>      T12> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types13<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types14<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types15<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types16<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types17<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types18<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types19<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types20<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types21<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types22<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types23<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types24<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types25<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types26<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25,
>      T26> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types27<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types28<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types29<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types30<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types31<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types32<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types33<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types34<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types35<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types36<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types37<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types38<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types39<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types40<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39,
>      T40> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types41<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, internal::None,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types42<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None, internal::None> {
>  typedef internal::Types43<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None, internal::None> {
>  typedef internal::Types44<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
>    internal::None, internal::None, internal::None, internal::None,
>    internal::None> {
>  typedef internal::Types45<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44, T45> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
>    T46, internal::None, internal::None, internal::None, internal::None> {
>  typedef internal::Types46<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44, T45, T46> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
>    T46, T47, internal::None, internal::None, internal::None> {
>  typedef internal::Types47<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44, T45, T46, T47> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47, typename T48>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
>    T46, T47, T48, internal::None, internal::None> {
>  typedef internal::Types48<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44, T45, T46, T47, T48> type;
>};
>template <typename T1, typename T2, typename T3, typename T4, typename T5,
>    typename T6, typename T7, typename T8, typename T9, typename T10,
>    typename T11, typename T12, typename T13, typename T14, typename T15,
>    typename T16, typename T17, typename T18, typename T19, typename T20,
>    typename T21, typename T22, typename T23, typename T24, typename T25,
>    typename T26, typename T27, typename T28, typename T29, typename T30,
>    typename T31, typename T32, typename T33, typename T34, typename T35,
>    typename T36, typename T37, typename T38, typename T39, typename T40,
>    typename T41, typename T42, typename T43, typename T44, typename T45,
>    typename T46, typename T47, typename T48, typename T49>
>struct Types<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12, T13, T14, T15,
>    T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26, T27, T28, T29, T30,
>    T31, T32, T33, T34, T35, T36, T37, T38, T39, T40, T41, T42, T43, T44, T45,
>    T46, T47, T48, T49, internal::None> {
>  typedef internal::Types49<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12,
>      T13, T14, T15, T16, T17, T18, T19, T20, T21, T22, T23, T24, T25, T26,
>      T27, T28, T29, T30, T31, T32, T33, T34, T35, T36, T37, T38, T39, T40,
>      T41, T42, T43, T44, T45, T46, T47, T48, T49> type;
>};
>
>namespace internal {
>
># define GTEST_TEMPLATE_ template <typename T> class
>
>// The template "selector" struct TemplateSel<Tmpl> is used to
>// represent Tmpl, which must be a class template with one type
>// parameter, as a type.  TemplateSel<Tmpl>::Bind<T>::type is defined
>// as the type Tmpl<T>.  This allows us to actually instantiate the
>// template "selected" by TemplateSel<Tmpl>.
>//
>// This trick is necessary for simulating typedef for class templates,
>// which C++ doesn't support directly.
>template <GTEST_TEMPLATE_ Tmpl>
>struct TemplateSel {
>  template <typename T>
>  struct Bind {
>    typedef Tmpl<T> type;
>  };
>};
>
># define GTEST_BIND_(TmplSel, T) \
>  TmplSel::template Bind<T>::type
>
>// A unique struct template used as the default value for the
>// arguments of class template Templates.  This allows us to simulate
>// variadic templates (e.g. Templates<int>, Templates<int, double>,
>// and etc), which C++ doesn't support directly.
>template <typename T>
>struct NoneT {};
>
>// The following family of struct and struct templates are used to
>// represent template lists.  In particular, TemplatesN<T1, T2, ...,
>// TN> represents a list of N templates (T1, T2, ..., and TN).  Except
>// for Templates0, every struct in the family has two member types:
>// Head for the selector of the first template in the list, and Tail
>// for the rest of the list.
>
>// The empty template list.
>struct Templates0 {};
>
>// Template lists of length 1, 2, 3, and so on.
>
>template <GTEST_TEMPLATE_ T1>
>struct Templates1 {
>  typedef TemplateSel<T1> Head;
>  typedef Templates0 Tail;
>};
>
>#endif  // GTEST_HAS_TYPED_TEST || GTEST_HAS_TYPED_TEST_P
>
>}  // namespace internal
>}  // namespace testing
>
>
>
>#include <boost/uuid/random_generator.hpp>
>
>int main()
>{
>  return 0;
>}

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Attachments on bug 36972: 8176