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Export of internal Abseil changes.

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dcff7cc4eb3837d39d1e083cbf1d4f082054cbf6 by Laramie Leavitt <lar@google.com>:

Add default and fallback modes for SaltedSeedSeq::generate().

SeedSeq::generate will often be called with contiguous ranges of uint32_t.
Detect this case and use the currently direct code paths to handle it.
Otherwise use a fallback mechanism which does an additional copy.
PiperOrigin-RevId: 258853656

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59ec88845ac2ee6567c493021b54385940d66762 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 258822137

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eb2d1ab21f6f94c24c51c1cd3719846be259e8e7 by Abseil Team <absl-team@google.com>:

Add iOS version 11 to the mix of Apple OS versions that have various C++17 header files
but do not support them.

PiperOrigin-RevId: 258820405

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452cea3e13b29797b2c385d7c6da7613d36bdc45 by Gennadiy Rozental <rogeeff@google.com>:

Internal change

PiperOrigin-RevId: 258802436
GitOrigin-RevId: dcff7cc4eb3837d39d1e083cbf1d4f082054cbf6
Change-Id: I2261cb58e142eb15017ef646a56710dd64f06496
This commit is contained in:
Abseil Team 2019-07-18 15:07:49 -07:00 • committed by Derek Mauro
parent 278b26058c
commit f3840bc5e3
5 changed files with 67 additions and 122 deletions
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22
absl/base/config.h
View file

@ -370,16 +370,20 @@
#error "absl endian detection needs to be set up for your compiler"
#endif
// MacOS 10.13 doesn't let you use <any>, <optional>, or <variant> even though
// the headers exist and are publicly noted to work. See
// 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.
#if defined(__APPLE__) && defined(_LIBCPP_VERSION) && \
defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 101400
#define ABSL_INTERNAL_MACOS_CXX17_TYPES_UNAVAILABLE 1
((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__ < 101200))
#define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 1
#else
#define ABSL_INTERNAL_MACOS_CXX17_TYPES_UNAVAILABLE 0
#define ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE 0
#endif
// ABSL_HAVE_STD_ANY
@ -391,7 +395,7 @@
#ifdef __has_include
#if __has_include(<any>) && __cplusplus >= 201703L && \
!ABSL_INTERNAL_MACOS_CXX17_TYPES_UNAVAILABLE
!ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
#define ABSL_HAVE_STD_ANY 1
#endif
#endif
@ -405,7 +409,7 @@
#ifdef __has_include
#if __has_include(<optional>) && __cplusplus >= 201703L && \
!ABSL_INTERNAL_MACOS_CXX17_TYPES_UNAVAILABLE
!ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
#define ABSL_HAVE_STD_OPTIONAL 1
#endif
#endif
@ -419,7 +423,7 @@
#ifdef __has_include
#if __has_include(<variant>) && __cplusplus >= 201703L && \
!ABSL_INTERNAL_MACOS_CXX17_TYPES_UNAVAILABLE
!ABSL_INTERNAL_APPLE_CXX17_TYPES_UNAVAILABLE
#define ABSL_HAVE_STD_VARIANT 1
#endif
#endif