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authorAbseil Team <absl-team@google.com>2018-08-28T08·05-0700
committerjueminyang <jueminyang@google.com>2018-08-28T15·08-0400
commitd6df769173bf0263489f98874b93034db0e479a2 (patch)
tree82b98e1d22f271165827b7c984cafe56dd11eab5 /absl/base/attributes.h
parent28080f5f050c9530aa9f2b39c60d8217038d64ff (diff)
Export of internal Abseil changes.
--
de82143f509d8fd6e70efc9eaed35582054a7443 by Abseil Team <absl-team@google.com>:

Mark optional::reset() with the ABSL_ATTRIBUTE_REINITIALIZES attribute.

This prevents false positives in the clang-tidy check bugprone-use-after-move; it allows reset() to be called on a moved-from optional without any warnings, and the optional will thereafter be regarded as initialized again.

PiperOrigin-RevId: 210502364

--
e645e68c44df957271e109aca6d68af530e27d04 by Derek Mauro <dmauro@google.com>:

Mark //absl/synchronization:thread_pool as only visible to internal
Abseil targets since it is internal-only.

PiperOrigin-RevId: 210406260

--
09b53240efba9bf73190eaea91fe33b9eafc3529 by Abseil Team <absl-team@google.com>:

Add support for the [[clang::reinitializes]] attribute.

This will be used to prevent false positives in the clang-tidy check
bugprone-use-after-move.

PiperOrigin-RevId: 210377317
GitOrigin-RevId: de82143f509d8fd6e70efc9eaed35582054a7443
Change-Id: Ibac1ee694f7b5b9f5aff8670559e49505ff8ee11
Diffstat (limited to 'absl/base/attributes.h')
-rw-r--r--absl/base/attributes.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/absl/base/attributes.h b/absl/base/attributes.h
index 3662f0fe7826..cc933bbaaee8 100644
--- a/absl/base/attributes.h
+++ b/absl/base/attributes.h
@@ -494,6 +494,20 @@
 #define ABSL_XRAY_LOG_ARGS(N)
 #endif
 
+// ABSL_ATTRIBUTE_REINITIALIZES
+//
+// Indicates that a member function reinitializes the entire object to a known
+// state, independent of the previous state of the object.
+//
+// The clang-tidy check bugprone-use-after-move allows member functions marked
+// with this attribute to be called on objects that have been moved from;
+// without the attribute, this would result in a use-after-move warning.
+#if ABSL_HAVE_CPP_ATTRIBUTE(clang::reinitializes)
+#define ABSL_ATTRIBUTE_REINITIALIZES [[clang::reinitializes]]
+#else
+#define ABSL_ATTRIBUTE_REINITIALIZES
+#endif
+
 // -----------------------------------------------------------------------------
 // Variable Attributes
 // -----------------------------------------------------------------------------