constexpr bool kHasUnalignedAccess = false;
#endif
-namespace detail {
+namespace portability_detail {
+
+template <typename I, I A, I B>
+using integral_max = std::integral_constant<I, (A < B) ? B : A>;
template <typename I, I A, I... Bs>
-struct integral_max
- : std::integral_constant<
- I,
- (A > integral_max<I, Bs...>::value) ? A
- : integral_max<I, Bs...>::value> {
-};
+struct integral_sequence_max
+ : integral_max<I, A, integral_sequence_max<I, Bs...>::value> {};
-template <typename I, size_t A>
-struct integral_max<I, A> : std::integral_constant<I, A> {};
+template <typename I, I A>
+struct integral_sequence_max<I, A> : std::integral_constant<I, A> {};
template <typename... Ts>
-using max_alignment = integral_max<size_t, alignof(Ts)...>;
+using max_alignment = integral_sequence_max<size_t, alignof(Ts)...>;
using max_basic_alignment = max_alignment<
std::max_align_t,
char32_t,
wchar_t,
std::nullptr_t>;
-} // namespace detail
+} // namespace portability_detail
-constexpr size_t max_align_v = detail::max_basic_alignment::value;
+constexpr size_t max_align_v = portability_detail::max_basic_alignment::value;
// max_align_t is a type which is aligned at least as strictly as the
// most-aligned basic type (see the specification of std::max_align_t). This
#endif
#if defined(__aarch64__)
-# define FOLLY_A64 1
+# define FOLLY_AARCH64 1
#else
-# define FOLLY_A64 0
+# define FOLLY_AARCH64 0
#endif
#if defined (__powerpc64__)
namespace folly {
constexpr bool kIsArchAmd64 = FOLLY_X64 == 1;
-constexpr bool kIsArchAArch64 = FOLLY_A64 == 1;
+constexpr bool kIsArchAArch64 = FOLLY_AARCH64 == 1;
constexpr bool kIsArchPPC64 = FOLLY_PPC64 == 1;
-}
+} // namespace folly
namespace folly {
#else
constexpr bool kIsSanitizeThread = false;
#endif
-}
+
+#if FOLLY_SANITIZE
+constexpr bool kIsSanitize = true;
+#else
+constexpr bool kIsSanitize = false;
+#endif
+} // namespace folly
// packing is very ugly in msvc
#ifdef _MSC_VER
# define FOLLY_MSVC_DISABLE_WARNING(warningNumber)
#endif
-#ifdef HAVE_SHADOW_LOCAL_WARNINGS
+#ifdef FOLLY_HAVE_SHADOW_LOCAL_WARNINGS
#define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS \
FOLLY_GCC_DISABLE_WARNING("-Wshadow-compatible-local") \
FOLLY_GCC_DISABLE_WARNING("-Wshadow-local")
#define FOLLY_GCC_DISABLE_NEW_SHADOW_WARNINGS /* empty */
#endif
-// portable version check for clang
-#ifndef __CLANG_PREREQ
-# if defined __clang__ && defined __clang_major__ && defined __clang_minor__
-/* nolint */
-# define __CLANG_PREREQ(maj, min) \
- ((__clang_major__ << 16) + __clang_minor__ >= ((maj) << 16) + (min))
-# else
-/* nolint */
-# define __CLANG_PREREQ(maj, min) 0
-# endif
-#endif
-
/* Platform specific TLS support
* gcc implements __thread
* msvc implements __declspec(thread)
#else
constexpr auto kIsDebug = true;
#endif
-}
+} // namespace folly
// Endianness
namespace folly {
constexpr auto kIsLittleEndian = __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__;
#endif
constexpr auto kIsBigEndian = !kIsLittleEndian;
-}
+} // namespace folly
#ifndef FOLLY_SSE
# if defined(__SSE4_2__)
namespace FOLLY_GFLAGS_NAMESPACE { }
namespace gflags {
using namespace FOLLY_GFLAGS_NAMESPACE;
-} // namespace gflags
+} // namespace gflags
#endif
// for TARGET_OS_IPHONE
constexpr auto kIsWindows = false;
constexpr auto kMscVer = 0;
#endif
-}
+} // namespace folly
+
+// Define FOLLY_USE_CPP14_CONSTEXPR to be true if the compiler's C++14
+// constexpr support is "good enough".
+#ifndef FOLLY_USE_CPP14_CONSTEXPR
+#if defined(__clang__)
+#define FOLLY_USE_CPP14_CONSTEXPR __cplusplus >= 201300L
+#elif defined(__GNUC__)
+#define FOLLY_USE_CPP14_CONSTEXPR __cplusplus >= 201304L
+#else
+#define FOLLY_USE_CPP14_CONSTEXPR 0 // MSVC?
+#endif
+#endif
+
+#if FOLLY_USE_CPP14_CONSTEXPR
+#define FOLLY_CPP14_CONSTEXPR constexpr
+#else
+#define FOLLY_CPP14_CONSTEXPR inline
+#endif
+
+#if __cpp_coroutines >= 201703L || (_MSC_VER && _RESUMABLE_FUNCTIONS_SUPPORTED)
+#define FOLLY_HAS_COROUTINES 1
+#endif
+
+// MSVC 2017.5
+#if __cpp_noexcept_function_type >= 201510 || _MSC_FULL_VER >= 191225816
+#define FOLLY_HAVE_NOEXCEPT_FUNCTION_TYPE 1
+#endif