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Export of internal Abseil changes.

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3f04cd3c25a99df91ff913977b8c5b343532db5d by Abseil Team <absl-team@google.com>:

Stricter memory order constraints for CycleClock callback.

PiperOrigin-RevId: 242670115

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216db48375306490f1722a11aaf33080939d9f2f by Abseil Team <absl-team@google.com>:

internal/optional.h: move macro from types/optional.h

ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS is only used within this file.
additionally check the macro with #ifdef rather than #if, fixes -Wundef
warning:
'ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS' is not defined, evaluates to 0
PiperOrigin-RevId: 242548205

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fbe22e7d8dc5c0b3d43ac26297e97ddbaeab3d39 by Samuel Benzaquen <sbenza@google.com>:

Implement %f natively for any input.
It evaluates the input at runtime and allocates stack space accordingly.

This removes a potential fallback into snprintf, improves performance, and removes all memory allocations in this formatting path.

PiperOrigin-RevId: 242531736

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1458f9ba2a79ef0534e46527cd34770dee54164d by Greg Falcon <gfalcon@google.com>:

Add explicit check for NVCC in compressed_tuple.h.

NVCC claims to be MSVC, but does not implement this MSVC attribute.

PiperOrigin-RevId: 242513453
GitOrigin-RevId: 3f04cd3c25a99df91ff913977b8c5b343532db5d
Change-Id: I0742e8619c5248c7607961113e406486bc0e279b
This commit is contained in:
Abseil Team 2019-04-09 08:22:32 -07:00 • committed by Shaindel Schwartz
parent 044da8a29c
commit dbae8764fb
8 changed files with 78 additions and 584 deletions
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29
absl/types/optional.h
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@ -64,34 +64,6 @@ using std::nullopt;
#include "absl/types/bad_optional_access.h"
#include "absl/types/internal/optional.h"
// ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
//
// Inheriting constructors is supported in GCC 4.8+, Clang 3.3+ and MSVC 2015.
// __cpp_inheriting_constructors is a predefined macro and a recommended way to
// check for this language feature, but GCC doesn't support it until 5.0 and
// Clang doesn't support it until 3.6.
// Also, MSVC 2015 has a bug: it doesn't inherit the constexpr template
// constructor. For example, the following code won't work on MSVC 2015 Update3:
// struct Base {
// int t;
// template <typename T>
// constexpr Base(T t_) : t(t_) {}
// };
// struct Foo : Base {
// using Base::Base;
// }
// constexpr Foo foo(0); // doesn't work on MSVC 2015
#if defined(__clang__)
#if __has_feature(cxx_inheriting_constructors)
#define ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS 1
#endif
#elif (defined(__GNUC__) && \
(__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__ >= 8)) || \
(__cpp_inheriting_constructors >= 200802) || \
(defined(_MSC_VER) && _MSC_VER >= 1910)
#define ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS 1
#endif
namespace absl {
// nullopt_t
@ -791,7 +763,6 @@ struct hash<absl::optional<T> >
} // namespace std
#undef ABSL_OPTIONAL_USE_INHERITING_CONSTRUCTORS
#undef ABSL_MSVC_CONSTEXPR_BUG_IN_UNION_LIKE_CLASS
#endif // ABSL_HAVE_STD_OPTIONAL