diff options
| author |  Derek Mauro <dmauro@google.com> | 2023-04-19 09:01:27 -0700 |
|---|---|---|
| committer |  Copybara-Service <copybara-worker@google.com> | 2023-04-19 09:02:16 -0700 |
| commit | e85868cbef04e8e8ff518e09b6af3970bbe5d2eb (patch) | |
| tree | 7083f0f730c288474971836ce03c9eda06fa8ff0 /absl/base/config.h | |
| parent | fb0debf5835320a261612a541520ba3c3a11685f (diff) | |
Unify std type detection now that older compilers are no longer supported
PiperOrigin-RevId: 525462751
Change-Id: Ibd6202cb95e79a48a6b39ccc4b74ead04128eb91
Diffstat (limited to 'absl/base/config.h')
| -rw-r--r-- | absl/base/config.h | 51 |
1 files changed, 11 insertions, 40 deletions
diff --git a/absl/base/config.h b/absl/base/config.h index 3c2f60c1..7d06e11c 100644 --- a/absl/base/config.h +++ b/absl/base/config.h @@ -561,73 +561,44 @@ static_assert(ABSL_INTERNAL_INLINE_NAMESPACE_STR[0] != 'h' || // ABSL_HAVE_STD_ANY // -// Checks whether C++17 std::any is available by checking whether <any> exists. +// Checks whether C++17 std::any is available. #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 && \ +#elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ + ABSL_INTERNAL_CPLUSPLUS_LANG >= 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 +#elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ + ABSL_INTERNAL_CPLUSPLUS_LANG >= 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 +#elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ + ABSL_INTERNAL_CPLUSPLUS_LANG >= 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 +#elif defined(ABSL_INTERNAL_CPLUSPLUS_LANG) && \ + ABSL_INTERNAL_CPLUSPLUS_LANG >= 201703L #define ABSL_HAVE_STD_STRING_VIEW 1 #endif |