// // Copyright 2017 The Abseil Authors. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // https://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. // // ----------------------------------------------------------------------------- // File: config.h // ----------------------------------------------------------------------------- // // This header file defines a set of macros for checking the presence of // important compiler and platform features. Such macros can be used to // produce portable code by parameterizing compilation based on the presence or // lack of a given feature. // // We define a "feature" as some interface we wish to program to: for example, // a library function or system call. A value of `1` indicates support for // that feature; any other value indicates the feature support is undefined. // // Example: // // Suppose a programmer wants to write a program that uses the 'mmap()' system // call. The Abseil macro for that feature (`ABSL_HAVE_MMAP`) allows you to // selectively include the `mmap.h` header and bracket code using that feature // in the macro: // // #include "absl/base/config.h" // // #ifdef ABSL_HAVE_MMAP // #include "sys/mman.h" // #endif //ABSL_HAVE_MMAP // // ... // #ifdef ABSL_HAVE_MMAP // void *ptr = mmap(...); // ... // #endif // ABSL_HAVE_MMAP #ifndef ABSL_BASE_CONFIG_H_ #define ABSL_BASE_CONFIG_H_ // Included for the __GLIBC__ macro (or similar macros on other systems). #include <limits.h> #ifdef __cplusplus // Included for __GLIBCXX__, _LIBCPP_VERSION #include <cstddef> #endif // __cplusplus #if defined(__APPLE__) // Included for TARGET_OS_IPHONE, __IPHONE_OS_VERSION_MIN_REQUIRED, // __IPHONE_8_0. #include <Availability.h> #include <TargetConditionals.h> #endif #include "absl/base/options.h" #include "absl/base/policy_checks.h" // Abseil long-term support (LTS) releases will define // `ABSL_LTS_RELEASE_VERSION` to the integer representing the date string of the // LTS release version, and will define `ABSL_LTS_RELEASE_PATCH_LEVEL` to the // integer representing the patch-level for that release. // // For example, for LTS release version "20300401.2", this would give us // ABSL_LTS_RELEASE_VERSION == 20300401 && ABSL_LTS_RELEASE_PATCH_LEVEL == 2 // // These symbols will not be defined in non-LTS code. // // Abseil recommends that clients live-at-head. Therefore, if you are using // these symbols to assert a minimum version requirement, we recommend you do it // as // // #if defined(ABSL_LTS_RELEASE_VERSION) && ABSL_LTS_RELEASE_VERSION < 20300401 // #error Project foo requires Abseil LTS version >= 20300401 // #endif // // The `defined(ABSL_LTS_RELEASE_VERSION)` part of the check excludes // live-at-head clients from the minimum version assertion. // // See https://abseil.io/about/releases for more information on Abseil release // management. // // LTS releases can be obtained from // https://github.com/abseil/abseil-cpp/releases. #define ABSL_LTS_RELEASE_VERSION 20211102 #define ABSL_LTS_RELEASE_PATCH_LEVEL 0 // Helper macro to convert a CPP variable to a string literal. #define ABSL_INTERNAL_DO_TOKEN_STR(x) #x #define ABSL_INTERNAL_TOKEN_STR(x) ABSL_INTERNAL_DO_TOKEN_STR(x) // ----------------------------------------------------------------------------- // Abseil namespace annotations // ----------------------------------------------------------------------------- // ABSL_NAMESPACE_BEGIN/ABSL_NAMESPACE_END // // An annotation placed at the beginning/end of each `namespace absl` scope. // This is used to inject an inline namespace. // // The proper way to write Abseil code in the `absl` namespace is: // // namespace absl { // ABSL_NAMESPACE_BEGIN // // void Foo(); // absl::Foo(). // // ABSL_NAMESPACE_END // } // namespace absl // // Users of Abseil should not use these macros, because users of Abseil should // not write `namespace absl {` in their own code for any reason. (Abseil does // not support forward declarations of its own types, nor does it support // user-provided specialization of Abseil templates. Code that violates these // rules may be broken without warning.) #if !defined(ABSL_OPTION_USE_INLINE_NAMESPACE) || \ !defined(ABSL_OPTION_INLINE_NAMESPACE_NAME) #error options.h is misconfigured. #endif // Check that ABSL_OPTION_INLINE_NAMESPACE_NAME is neither "head" nor "" #if defined(__cplusplus) && ABSL_OPTION_USE_INLINE_NAMESPACE == 1 #define ABSL_INTERNAL_INLINE_NAMESPACE_STR \ ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME) static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != '\0', "options.h misconfigured: ABSL_OPTION_INLINE_NAMESPACE_NAME must " "not be empty."); static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' || ABSL_INTERNAL_INLINE_NAMESPACE_STR[1] != 'e' || ABSL_INTERNAL_INLINE_NAMESPACE_STR[2] != 'a' || ABSL_INTERNAL_INLINE_NAMESPACE_STR[3] != 'd' || ABSL_INTERNAL_INLINE_NAMESPACE_STR[4] != '\0', "options.h misconfigured: ABSL_OPTION_INLINE_NAMESPACE_NAME must " "be changed to a new, unique identifier name."); #endif #if ABSL_OPTION_USE_INLINE_NAMESPACE == 0 #define ABSL_NAMESPACE_BEGIN #define ABSL_NAMESPACE_END #define ABSL_INTERNAL_C_SYMBOL(x) x #elif ABSL_OPTION_USE_INLINE_NAMESPACE == 1 #define ABSL_NAMESPACE_BEGIN \ inline namespace ABSL_OPTION_INLINE_NAMESPACE_NAME { #define ABSL_NAMESPACE_END } #define ABSL_INTERNAL_C_SYMBOL_HELPER_2(x, v) x##_##v #define ABSL_INTERNAL_C_SYMBOL_HELPER_1(x, v) \ ABSL_INTERNAL_C_SYMBOL_HELPER_2(x, v) #define ABSL_INTERNAL_C_SYMBOL(x) \ ABSL_INTERNAL_C_SYMBOL_HELPER_1(x, ABSL_OPTION_INLINE_NAMESPACE_NAME) #else #error options.h is misconfigured. #endif // ----------------------------------------------------------------------------- // Compiler Feature Checks // ----------------------------------------------------------------------------- // ABSL_HAVE_BUILTIN() // // Checks whether the compiler supports a Clang Feature Checking Macro, and if // so, checks whether it supports the provided builtin function "x" where x // is one of the functions noted in // https://clang.llvm.org/docs/LanguageExtensions.html // // Note: Use this macro to avoid an extra level of #ifdef __has_builtin check. // http://releases.llvm.org/3.3/tools/clang/docs/LanguageExtensions.html #ifdef __has_builtin #define ABSL_HAVE_BUILTIN(x) __has_builtin(x) #else #define ABSL_HAVE_BUILTIN(x) 0 #endif #if defined(__is_identifier) #define ABSL_INTERNAL_HAS_KEYWORD(x) !(__is_identifier(x)) #else #define ABSL_INTERNAL_HAS_KEYWORD(x) 0 #endif #ifdef __has_feature #define ABSL_HAVE_FEATURE(f) __has_feature(f) #else #define ABSL_HAVE_FEATURE(f) 0 #endif // Portable check for GCC minimum version: // https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html #if defined(__GNUC__) && defined(__GNUC_MINOR__) #define ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(x, y) \ (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y)) #else #define ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(x, y) 0 #endif #if defined(__clang__) && defined(__clang_major__) && defined(__clang_minor__) #define ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(x, y) \ (__clang_major__ > (x) || __clang_major__ == (x) && __clang_minor__ >= (y)) #else #define ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(x, y) 0 #endif // ABSL_HAVE_TLS is defined to 1 when __thread should be supported. // We assume __thread is supported on Linux when compiled with Clang or compiled // against libstdc++ with _GLIBCXX_HAVE_TLS defined. #ifdef ABSL_HAVE_TLS #error ABSL_HAVE_TLS cannot be directly set #elif defined(__linux__) && (defined(__clang__) || defined(_GLIBCXX_HAVE_TLS)) #define ABSL_HAVE_TLS 1 #endif // ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE // // Checks whether `std::is_trivially_destructible<T>` is supported. // // Notes: All supported compilers using libc++ support this feature, as does // gcc >= 4.8.1 using libstdc++, and Visual Studio. #ifdef ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE #error ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE cannot be directly set #elif defined(_LIBCPP_VERSION) || defined(_MSC_VER) || \ (!defined(__clang__) && defined(__GLIBCXX__) && \ ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(4, 8)) #define ABSL_HAVE_STD_IS_TRIVIALLY_DESTRUCTIBLE 1 #endif // ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE // // Checks whether `std::is_trivially_default_constructible<T>` and // `std::is_trivially_copy_constructible<T>` are supported. // ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE // // Checks whether `std::is_trivially_copy_assignable<T>` is supported. // Notes: Clang with libc++ supports these features, as does gcc >= 7.4 with // libstdc++, or gcc >= 8.2 with libc++, and Visual Studio (but not NVCC). #if defined(ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE) #error ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE cannot be directly set #elif defined(ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE) #error ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE cannot directly set #elif (defined(__clang__) && defined(_LIBCPP_VERSION)) || \ (!defined(__clang__) && \ ((ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(7, 4) && defined(__GLIBCXX__)) || \ (ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(8, 2) && \ defined(_LIBCPP_VERSION)))) || \ (defined(_MSC_VER) && !defined(__NVCC__)) #define ABSL_HAVE_STD_IS_TRIVIALLY_CONSTRUCTIBLE 1 #define ABSL_HAVE_STD_IS_TRIVIALLY_ASSIGNABLE 1 #endif // ABSL_HAVE_SOURCE_LOCATION_CURRENT // // Indicates whether `absl::SourceLocation::current()` will return useful // information in some contexts. #ifndef ABSL_HAVE_SOURCE_LOCATION_CURRENT #if ABSL_INTERNAL_HAS_KEYWORD(__builtin_LINE) && \ ABSL_INTERNAL_HAS_KEYWORD(__builtin_FILE) #define ABSL_HAVE_SOURCE_LOCATION_CURRENT 1 #elif ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(5, 0) #define ABSL_HAVE_SOURCE_LOCATION_CURRENT 1 #endif #endif // ABSL_HAVE_THREAD_LOCAL // // Checks whether C++11's `thread_local` storage duration specifier is // supported. #ifdef ABSL_HAVE_THREAD_LOCAL #error ABSL_HAVE_THREAD_LOCAL cannot be directly set #elif defined(__APPLE__) // Notes: // * Xcode's clang did not support `thread_local` until version 8, and // even then not for all iOS < 9.0. // * Xcode 9.3 started disallowing `thread_local` for 32-bit iOS simulator // targeting iOS 9.x. // * Xcode 10 moves the deployment target check for iOS < 9.0 to link time // making ABSL_HAVE_FEATURE unreliable there. // #if ABSL_HAVE_FEATURE(cxx_thread_local) && \ !(TARGET_OS_IPHONE && __IPHONE_OS_VERSION_MIN_REQUIRED < __IPHONE_9_0) #define ABSL_HAVE_THREAD_LOCAL 1 #endif #else // !defined(__APPLE__) #define ABSL_HAVE_THREAD_LOCAL 1 #endif // There are platforms for which TLS should not be used even though the compiler // makes it seem like it's supported (Android NDK < r12b for example). // This is primarily because of linker problems and toolchain misconfiguration: // Abseil does not intend to support this indefinitely. Currently, the newest // toolchain that we intend to support that requires this behavior is the // r11 NDK - allowing for a 5 year support window on that means this option // is likely to be removed around June of 2021. // TLS isn't supported until NDK r12b per // https://developer.android.com/ndk/downloads/revision_history.html // Since NDK r16, `__NDK_MAJOR__` and `__NDK_MINOR__` are defined in // <android/ndk-version.h>. For NDK < r16, users should define these macros, // e.g. `-D__NDK_MAJOR__=11 -D__NKD_MINOR__=0` for NDK r11. #if defined(__ANDROID__) && defined(__clang__) #if __has_include(<android/ndk-version.h>) #include <android/ndk-version.h> #endif // __has_include(<android/ndk-version.h>) #if defined(__ANDROID__) && defined(__clang__) && defined(__NDK_MAJOR__) && \ defined(__NDK_MINOR__) && \ ((__NDK_MAJOR__ < 12) || ((__NDK_MAJOR__ == 12) && (__NDK_MINOR__ < 1))) #undef ABSL_HAVE_TLS #undef ABSL_HAVE_THREAD_LOCAL #endif #endif // defined(__ANDROID__) && defined(__clang__) // ABSL_HAVE_INTRINSIC_INT128 // // Checks whether the __int128 compiler extension for a 128-bit integral type is // supported. // // Note: __SIZEOF_INT128__ is defined by Clang and GCC when __int128 is // supported, but we avoid using it in certain cases: // * On Clang: // * Building using Clang for Windows, where the Clang runtime library has // 128-bit support only on LP64 architectures, but Windows is LLP64. // * On Nvidia's nvcc: // * nvcc also defines __GNUC__ and __SIZEOF_INT128__, but not all versions // actually support __int128. #ifdef ABSL_HAVE_INTRINSIC_INT128 #error ABSL_HAVE_INTRINSIC_INT128 cannot be directly set #elif defined(__SIZEOF_INT128__) #if (defined(__clang__) && !defined(_WIN32)) || \ (defined(__CUDACC__) && __CUDACC_VER_MAJOR__ >= 9) || \ (defined(__GNUC__) && !defined(__clang__) && !defined(__CUDACC__)) #define ABSL_HAVE_INTRINSIC_INT128 1 #elif defined(__CUDACC__) // __CUDACC_VER__ is a full version number before CUDA 9, and is defined to a // string explaining that it has been removed starting with CUDA 9. We use // nested #ifs because there is no short-circuiting in the preprocessor. // NOTE: `__CUDACC__` could be undefined while `__CUDACC_VER__` is defined. #if __CUDACC_VER__ >= 70000 #define ABSL_HAVE_INTRINSIC_INT128 1 #endif // __CUDACC_VER__ >= 70000 #endif // defined(__CUDACC__) #endif // ABSL_HAVE_INTRINSIC_INT128 // ABSL_HAVE_EXCEPTIONS // // Checks whether the compiler both supports and enables exceptions. Many // compilers support a "no exceptions" mode that disables exceptions. // // Generally, when ABSL_HAVE_EXCEPTIONS is not defined: // // * Code using `throw` and `try` may not compile. // * The `noexcept` specifier will still compile and behave as normal. // * The `noexcept` operator may still return `false`. // // For further details, consult the compiler's documentation. #ifdef ABSL_HAVE_EXCEPTIONS #error ABSL_HAVE_EXCEPTIONS cannot be directly set. #elif ABSL_INTERNAL_HAVE_MIN_CLANG_VERSION(3, 6) // Clang >= 3.6 #if ABSL_HAVE_FEATURE(cxx_exceptions) #define ABSL_HAVE_EXCEPTIONS 1 #endif // ABSL_HAVE_FEATURE(cxx_exceptions) #elif defined(__clang__) // Clang < 3.6 // http://releases.llvm.org/3.6.0/tools/clang/docs/ReleaseNotes.html#the-exceptions-macro #if defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions) #define ABSL_HAVE_EXCEPTIONS 1 #endif // defined(__EXCEPTIONS) && ABSL_HAVE_FEATURE(cxx_exceptions) // Handle remaining special cases and default to exceptions being supported. #elif !(defined(__GNUC__) && (__GNUC__ < 5) && !defined(__EXCEPTIONS)) && \ !(ABSL_INTERNAL_HAVE_MIN_GNUC_VERSION(5, 0) && \ !defined(__cpp_exceptions)) && \ !(defined(_MSC_VER) && !defined(_CPPUNWIND)) #define ABSL_HAVE_EXCEPTIONS 1 #endif // ----------------------------------------------------------------------------- // Platform Feature Checks // ----------------------------------------------------------------------------- // Currently supported operating systems and associated preprocessor // symbols: // // Linux and Linux-derived __linux__ // Android __ANDROID__ (implies __linux__) // Linux (non-Android) __linux__ && !__ANDROID__ // Darwin (macOS and iOS) __APPLE__ // Akaros (http://akaros.org) __ros__ // Windows _WIN32 // NaCL __native_client__ // AsmJS __asmjs__ // WebAssembly __wasm__ // Fuchsia __Fuchsia__ // // Note that since Android defines both __ANDROID__ and __linux__, one // may probe for either Linux or Android by simply testing for __linux__. // ABSL_HAVE_MMAP // // Checks whether the platform has an mmap(2) implementation as defined in // POSIX.1-2001. #ifdef ABSL_HAVE_MMAP #error ABSL_HAVE_MMAP cannot be directly set #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \ defined(_AIX) || defined(__ros__) || defined(__native_client__) || \ defined(__asmjs__) || defined(__wasm__) || defined(__Fuchsia__) || \ defined(__sun) || defined(__ASYLO__) || defined(__myriad2__) || \ defined(__HAIKU__) #define ABSL_HAVE_MMAP 1 #endif // ABSL_HAVE_PTHREAD_GETSCHEDPARAM // // Checks whether the platform implements the pthread_(get|set)schedparam(3) // functions as defined in POSIX.1-2001. #ifdef ABSL_HAVE_PTHREAD_GETSCHEDPARAM #error ABSL_HAVE_PTHREAD_GETSCHEDPARAM cannot be directly set #elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__) || \ defined(_AIX) || defined(__ros__) #define ABSL_HAVE_PTHREAD_GETSCHEDPARAM 1 #endif // ABSL_HAVE_SCHED_GETCPU // // Checks whether sched_getcpu is available. #ifdef ABSL_HAVE_SCHED_GETCPU #error ABSL_HAVE_SCHED_GETCPU cannot be directly set #elif defined(__linux__) #define ABSL_HAVE_SCHED_GETCPU 1 #endif // ABSL_HAVE_SCHED_YIELD // // Checks whether the platform implements sched_yield(2) as defined in // POSIX.1-2001. #ifdef ABSL_HAVE_SCHED_YIELD #error ABSL_HAVE_SCHED_YIELD cannot be directly set #elif defined(__linux__) || defined(__ros__) || defined(__native_client__) #define ABSL_HAVE_SCHED_YIELD 1 #endif // ABSL_HAVE_SEMAPHORE_H // // Checks whether the platform supports the <semaphore.h> header and sem_init(3) // family of functions as standardized in POSIX.1-2001. // // Note: While Apple provides <semaphore.h> for both iOS and macOS, it is // explicitly deprecated and will cause build failures if enabled for those // platforms. We side-step the issue by not defining it here for Apple // platforms. #ifdef ABSL_HAVE_SEMAPHORE_H #error ABSL_HAVE_SEMAPHORE_H cannot be directly set #elif defined(__linux__) || defined(__ros__) #define ABSL_HAVE_SEMAPHORE_H 1 #endif // ABSL_HAVE_ALARM // // Checks whether the platform supports the <signal.h> header and alarm(2) // function as standardized in POSIX.1-2001. #ifdef ABSL_HAVE_ALARM #error ABSL_HAVE_ALARM cannot be directly set #elif defined(__GOOGLE_GRTE_VERSION__) // feature tests for Google's GRTE #define ABSL_HAVE_ALARM 1 #elif defined(__GLIBC__) // feature test for glibc #define ABSL_HAVE_ALARM 1 #elif defined(_MSC_VER) // feature tests for Microsoft's library #elif defined(__MINGW32__) // mingw32 doesn't provide alarm(2): // https://osdn.net/projects/mingw/scm/git/mingw-org-wsl/blobs/5.2-trunk/mingwrt/include/unistd.h // mingw-w64 provides a no-op implementation: // https://sourceforge.net/p/mingw-w64/mingw-w64/ci/master/tree/mingw-w64-crt/misc/alarm.c #elif defined(__EMSCRIPTEN__) // emscripten doesn't support signals #elif defined(__Fuchsia__) // Signals don't exist on fuchsia. #elif defined(__native_client__) #else // other standard libraries #define ABSL_HAVE_ALARM 1 #endif // ABSL_IS_LITTLE_ENDIAN // ABSL_IS_BIG_ENDIAN // // Checks the endianness of the platform. // // Notes: uses the built in endian macros provided by GCC (since 4.6) and // Clang (since 3.2); see // https://gcc.gnu.org/onlinedocs/cpp/Common-Predefined-Macros.html. // Otherwise, if _WIN32, assume little endian. Otherwise, bail with an error. #if defined(ABSL_IS_BIG_ENDIAN) #error "ABSL_IS_BIG_ENDIAN cannot be directly set." #endif #if defined(ABSL_IS_LITTLE_ENDIAN) #error "ABSL_IS_LITTLE_ENDIAN cannot be directly set." #endif #if (defined(__BYTE_ORDER__) && defined(__ORDER_LITTLE_ENDIAN__) && \ __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) #define ABSL_IS_LITTLE_ENDIAN 1 #elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__) && \ __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ #define ABSL_IS_BIG_ENDIAN 1 #elif defined(_WIN32) #define ABSL_IS_LITTLE_ENDIAN 1 #else #error "absl endian detection needs to be set up for your compiler" #endif // macOS 10.13 and iOS 10.11 don't let you use <any>, <optional>, or <variant> // even though the headers exist and are publicly noted to work. See // https://github.com/abseil/abseil-cpp/issues/207 and // https://developer.apple.com/documentation/xcode_release_notes/xcode_10_release_notes // libc++ spells out the availability requirements in the file // llvm-project/libcxx/include/__config via the #define // _LIBCPP_AVAILABILITY_BAD_OPTIONAL_ACCESS. #if defined(__APPLE__) && defined(_LIBCPP_VERSION) && \ ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \ __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101400) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && \ __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ < 120000) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && \ __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ < 50000) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && \ __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ < 120000)) #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1 #else #define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0 #endif // ABSL_HAVE_STD_ANY // // Checks whether C++17 std::any is available by checking whether <any> exists. #ifdef ABSL_HAVE_STD_ANY #error "ABSL_HAVE_STD_ANY cannot be directly set." #endif #ifdef __has_include #if __has_include(<any>) && defined(__cplusplus) && __cplusplus >= 201703L && \ !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE #define ABSL_HAVE_STD_ANY 1 #endif #endif // ABSL_HAVE_STD_OPTIONAL // // Checks whether C++17 std::optional is available. #ifdef ABSL_HAVE_STD_OPTIONAL #error "ABSL_HAVE_STD_OPTIONAL cannot be directly set." #endif #ifdef __has_include #if __has_include(<optional>) && defined(__cplusplus) && \ __cplusplus >= 201703L && !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE #define ABSL_HAVE_STD_OPTIONAL 1 #endif #endif // ABSL_HAVE_STD_VARIANT // // Checks whether C++17 std::variant is available. #ifdef ABSL_HAVE_STD_VARIANT #error "ABSL_HAVE_STD_VARIANT cannot be directly set." #endif #ifdef __has_include #if __has_include(<variant>) && defined(__cplusplus) && \ __cplusplus >= 201703L && !ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE #define ABSL_HAVE_STD_VARIANT 1 #endif #endif // ABSL_HAVE_STD_STRING_VIEW // // Checks whether C++17 std::string_view is available. #ifdef ABSL_HAVE_STD_STRING_VIEW #error "ABSL_HAVE_STD_STRING_VIEW cannot be directly set." #endif #ifdef __has_include #if __has_include(<string_view>) && defined(__cplusplus) && \ __cplusplus >= 201703L #define ABSL_HAVE_STD_STRING_VIEW 1 #endif #endif // For MSVC, `__has_include` is supported in VS 2017 15.3, which is later than // the support for <optional>, <any>, <string_view>, <variant>. So we use // _MSC_VER to check whether we have VS 2017 RTM (when <optional>, <any>, // <string_view>, <variant> is implemented) or higher. Also, `__cplusplus` is // not correctly set by MSVC, so we use `_MSVC_LANG` to check the language // version. // TODO(zhangxy): fix tests before enabling aliasing for `std::any`. #if defined(_MSC_VER) && _MSC_VER >= 1910 && \ ((defined(_MSVC_LANG) && _MSVC_LANG > 201402) || \ (defined(__cplusplus) && __cplusplus > 201402)) // #define ABSL_HAVE_STD_ANY 1 #define ABSL_HAVE_STD_OPTIONAL 1 #define ABSL_HAVE_STD_VARIANT 1 #define ABSL_HAVE_STD_STRING_VIEW 1 #endif // ABSL_USES_STD_ANY // // Indicates whether absl::any is an alias for std::any. #if !defined(ABSL_OPTION_USE_STD_ANY) #error options.h is misconfigured. #elif ABSL_OPTION_USE_STD_ANY == 0 || \ (ABSL_OPTION_USE_STD_ANY == 2 && !defined(ABSL_HAVE_STD_ANY)) #undef ABSL_USES_STD_ANY #elif ABSL_OPTION_USE_STD_ANY == 1 || \ (ABSL_OPTION_USE_STD_ANY == 2 && defined(ABSL_HAVE_STD_ANY)) #define ABSL_USES_STD_ANY 1 #else #error options.h is misconfigured. #endif // ABSL_USES_STD_OPTIONAL // // Indicates whether absl::optional is an alias for std::optional. #if !defined(ABSL_OPTION_USE_STD_OPTIONAL) #error options.h is misconfigured. #elif ABSL_OPTION_USE_STD_OPTIONAL == 0 || \ (ABSL_OPTION_USE_STD_OPTIONAL == 2 && !defined(ABSL_HAVE_STD_OPTIONAL)) #undef ABSL_USES_STD_OPTIONAL #elif ABSL_OPTION_USE_STD_OPTIONAL == 1 || \ (ABSL_OPTION_USE_STD_OPTIONAL == 2 && defined(ABSL_HAVE_STD_OPTIONAL)) #define ABSL_USES_STD_OPTIONAL 1 #else #error options.h is misconfigured. #endif // ABSL_USES_STD_VARIANT // // Indicates whether absl::variant is an alias for std::variant. #if !defined(ABSL_OPTION_USE_STD_VARIANT) #error options.h is misconfigured. #elif ABSL_OPTION_USE_STD_VARIANT == 0 || \ (ABSL_OPTION_USE_STD_VARIANT == 2 && !defined(ABSL_HAVE_STD_VARIANT)) #undef ABSL_USES_STD_VARIANT #elif ABSL_OPTION_USE_STD_VARIANT == 1 || \ (ABSL_OPTION_USE_STD_VARIANT == 2 && defined(ABSL_HAVE_STD_VARIANT)) #define ABSL_USES_STD_VARIANT 1 #else #error options.h is misconfigured. #endif // ABSL_USES_STD_STRING_VIEW // // Indicates whether absl::string_view is an alias for std::string_view. #if !defined(ABSL_OPTION_USE_STD_STRING_VIEW) #error options.h is misconfigured. #elif ABSL_OPTION_USE_STD_STRING_VIEW == 0 || \ (ABSL_OPTION_USE_STD_STRING_VIEW == 2 && \ !defined(ABSL_HAVE_STD_STRING_VIEW)) #undef ABSL_USES_STD_STRING_VIEW #elif ABSL_OPTION_USE_STD_STRING_VIEW == 1 || \ (ABSL_OPTION_USE_STD_STRING_VIEW == 2 && \ defined(ABSL_HAVE_STD_STRING_VIEW)) #define ABSL_USES_STD_STRING_VIEW 1 #else #error options.h is misconfigured. #endif // In debug mode, MSVC 2017's std::variant throws a EXCEPTION_ACCESS_VIOLATION // SEH exception from emplace for variant<SomeStruct> when constructing the // struct can throw. This defeats some of variant_test and // variant_exception_safety_test. #if defined(_MSC_VER) && _MSC_VER >= 1700 && defined(_DEBUG) #define ABSL_INTERNAL_MSVC_2017_DBG_MODE #endif // ABSL_INTERNAL_MANGLED_NS // ABSL_INTERNAL_MANGLED_BACKREFERENCE // // Internal macros for building up mangled names in our internal fork of CCTZ. // This implementation detail is only needed and provided for the MSVC build. // // These macros both expand to string literals. ABSL_INTERNAL_MANGLED_NS is // the mangled spelling of the `absl` namespace, and // ABSL_INTERNAL_MANGLED_BACKREFERENCE is a back-reference integer representing // the proper count to skip past the CCTZ fork namespace names. (This number // is one larger when there is an inline namespace name to skip.) #if defined(_MSC_VER) #if ABSL_OPTION_USE_INLINE_NAMESPACE == 0 #define ABSL_INTERNAL_MANGLED_NS "absl" #define ABSL_INTERNAL_MANGLED_BACKREFERENCE "5" #else #define ABSL_INTERNAL_MANGLED_NS \ ABSL_INTERNAL_TOKEN_STR(ABSL_OPTION_INLINE_NAMESPACE_NAME) "@absl" #define ABSL_INTERNAL_MANGLED_BACKREFERENCE "6" #endif #endif #undef ABSL_INTERNAL_HAS_KEYWORD // ABSL_DLL // // When building Abseil as a DLL, this macro expands to `__declspec(dllexport)` // so we can annotate symbols appropriately as being exported. When used in // headers consuming a DLL, this macro expands to `__declspec(dllimport)` so // that consumers know the symbol is defined inside the DLL. In all other cases, // the macro expands to nothing. #if defined(_MSC_VER) #if defined(ABSL_BUILD_DLL) #define ABSL_DLL __declspec(dllexport) #elif defined(ABSL_CONSUME_DLL) #define ABSL_DLL __declspec(dllimport) #else #define ABSL_DLL #endif #else #define ABSL_DLL #endif // defined(_MSC_VER) // ABSL_HAVE_MEMORY_SANITIZER // // MemorySanitizer (MSan) is a detector of uninitialized reads. It consists of // a compiler instrumentation module and a run-time library. #ifdef ABSL_HAVE_MEMORY_SANITIZER #error "ABSL_HAVE_MEMORY_SANITIZER cannot be directly set." #elif defined(__SANITIZE_MEMORY__) #define ABSL_HAVE_MEMORY_SANITIZER 1 #elif !defined(__native_client__) && ABSL_HAVE_FEATURE(memory_sanitizer) #define ABSL_HAVE_MEMORY_SANITIZER 1 #endif // ABSL_HAVE_THREAD_SANITIZER // // ThreadSanitizer (TSan) is a fast data race detector. #ifdef ABSL_HAVE_THREAD_SANITIZER #error "ABSL_HAVE_THREAD_SANITIZER cannot be directly set." #elif defined(__SANITIZE_THREAD__) #define ABSL_HAVE_THREAD_SANITIZER 1 #elif ABSL_HAVE_FEATURE(thread_sanitizer) #define ABSL_HAVE_THREAD_SANITIZER 1 #endif // ABSL_HAVE_ADDRESS_SANITIZER // // AddressSanitizer (ASan) is a fast memory error detector. #ifdef ABSL_HAVE_ADDRESS_SANITIZER #error "ABSL_HAVE_ADDRESS_SANITIZER cannot be directly set." #elif defined(__SANITIZE_ADDRESS__) #define ABSL_HAVE_ADDRESS_SANITIZER 1 #elif ABSL_HAVE_FEATURE(address_sanitizer) #define ABSL_HAVE_ADDRESS_SANITIZER 1 #endif // ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION // // Class template argument deduction is a language feature added in C++17. #ifdef ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION #error "ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION cannot be directly set." #elif defined(__cpp_deduction_guides) #define ABSL_HAVE_CLASS_TEMPLATE_ARGUMENT_DEDUCTION 1 #endif #endif // ABSL_BASE_CONFIG_H_