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Export of internal Abseil changes.

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5755b40f6025f3ca126070fc68adb8fde9a7f01b by Abseil Team <absl-team@google.com>:

Fix -Wextra-semi error.

PiperOrigin-RevId: 243215850

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3b6b6e18df9fbd233943cae460f0063f4efaa7c7 by Eric Fiselier <ericwf@google.com>:

Internal Change.

PiperOrigin-RevId: 243152671

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82eef03f246009c806c25607c5682547cb4ad21e by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 243151861

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c14e6340fca7070634e0ecfdf97833d930dd0e5d by Samuel Benzaquen <sbenza@google.com>:

Internal change

PiperOrigin-RevId: 243123590

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9abb7a6b22457c0aa72d72b3b9392efd226d302a by Andy Getzendanner <durandal@google.com>:

Implement operator<<(std::ostream &, absl::LogSeverity) so that absl::LogSeverity values can be streamed.

PiperOrigin-RevId: 243117646
GitOrigin-RevId: 5755b40f6025f3ca126070fc68adb8fde9a7f01b
Change-Id: I7ea607d8a4e803ad15a3090139271f58ad4173a3
This commit is contained in:
Abseil Team 2019-04-12 00:26:40 -07:00 • committed by Shaindel Schwartz
parent 0b545b4601
commit a02f62f456
12 changed files with 281 additions and 26 deletions
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22
absl/base/casts.h
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@ -30,28 +30,20 @@
#include "absl/base/internal/identity.h"
#include "absl/base/macros.h"
#include "absl/meta/type_traits.h"
namespace absl {
namespace internal_casts {
// NOTE: Not a fully compliant implementation of `std::is_trivially_copyable`.
// TODO(calabrese) Branch on implementations that directly provide
// `std::is_trivially_copyable`, create a more rigorous workaround, and publicly
// expose in meta/type_traits.
template <class T>
struct is_trivially_copyable
: std::integral_constant<
bool, std::is_destructible<T>::value&& __has_trivial_destructor(T) &&
__has_trivial_copy(T) && __has_trivial_assign(T)> {};
template <class Dest, class Source>
struct is_bitcastable
: std::integral_constant<bool,
sizeof(Dest) == sizeof(Source) &&
is_trivially_copyable<Source>::value &&
is_trivially_copyable<Dest>::value &&
std::is_default_constructible<Dest>::value> {};
: std::integral_constant<
bool,
sizeof(Dest) == sizeof(Source) &&
type_traits_internal::is_trivially_copyable<Source>::value &&
type_traits_internal::is_trivially_copyable<Dest>::value &&
std::is_default_constructible<Dest>::value> {};
} // namespace internal_casts