Export of internal Abseil changes

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f6d1ddef9a38e3fb8492181bf1a7a006b7f2145d by Abseil Team <absl-team@google.com>:

Update the implementation of `operator<<` in Status to use `ToString(StatusToStringMode::kWithEverything)`

PiperOrigin-RevId: 380740880

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5f13b20c4b85c1c6e94b69c74f80f8f3f3941747 by Derek Mauro <dmauro@google.com>:

Update Docker images

This also disables the Clang/libstdc++/C++20 combo as it seems that
the latest libstdc++ is relying on C++20 Concepts to a greater extent
than Clang supports.

PiperOrigin-RevId: 380714572

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f8f4dee12cfd02559bf741ad6b06f10ac0c48c73 by Abseil Team <absl-team@google.com>:

Fix shadow member warnings in randen_hwaes.cc

These happen when attempting to use abseil in github.com/google/benchmark. The project sets -Wshadow.

The warning is due to the name of the Vector128 ctor parameter. Using v instead, which I see used elsewhere (e.g. line 290)

PiperOrigin-RevId: 380704197

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2e1a09e9cb1239485715acb4828d9b4799fcfbb5 by Tom Manshreck <shreck@google.com>:

Add more precise documentation for AbslParseFlag declarations in the Time API

PiperOrigin-RevId: 380649107

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153e5f7a960c03e4161c03737a0ff18ba377ff73 by Evan Brown <ezb@google.com>:

Make the number of control bytes a constant.

We use a constexpr function because we need to support C++11, which doesn't have inline variables.

The motivation is to avoid future bugs where the number changes and we forget to update all the places it's used.

This CL should be a no-op.

PiperOrigin-RevId: 380253975
GitOrigin-RevId: f6d1ddef9a38e3fb8492181bf1a7a006b7f2145d
Change-Id: Id584138f898bf3ebef95fabcf48e41098c4db954

5 files changed, 39 insertions, 15 deletions

diff --git a/absl/container/internal/raw_hash_set.cc b/absl/container/internal/raw_hash_set.cc
index c9840f79..f5a9ce68 100644
--- a/absl/container/internal/raw_hash_set.cc
+++ b/absl/container/internal/raw_hash_set.cc
@@ -51,7 +51,7 @@ void ConvertDeletedToEmptyAndFullToDeleted(
     Group{pos}.ConvertSpecialToEmptyAndFullToDeleted(pos);
   }
   // Copy the cloned ctrl bytes.
-  std::memcpy(ctrl + capacity + 1, ctrl, Group::kWidth - 1);
+  std::memcpy(ctrl + capacity + 1, ctrl, NumClonedBytes());
   ctrl[capacity] = kSentinel;
 }
 
diff --git a/absl/container/internal/raw_hash_set.h b/absl/container/internal/raw_hash_set.h
index 844890f0..508f2124 100644
--- a/absl/container/internal/raw_hash_set.h
+++ b/absl/container/internal/raw_hash_set.h
@@ -448,6 +448,10 @@ using Group = GroupSse2Impl;
 using Group = GroupPortableImpl;
 #endif
 
+// The number of cloned control bytes that we copy from the beginning to the
+// end of the control bytes array.
+constexpr size_t NumClonedBytes() { return Group::kWidth - 1; }
+
 template <class Policy, class Hash, class Eq, class Alloc>
 class raw_hash_set;
 
@@ -629,8 +633,8 @@ class raw_hash_set {
   static Layout MakeLayout(size_t capacity) {
     assert(IsValidCapacity(capacity));
     // The extra control bytes are for 1 sentinel byte followed by
-    // `Group::kWidth - 1` bytes that are cloned from the beginning.
-    return Layout(capacity + Group::kWidth, capacity);
+    // NumClonedBytes() bytes that are cloned from the beginning.
+    return Layout(capacity + 1 + NumClonedBytes(), capacity);
   }
 
   using AllocTraits = absl::allocator_traits<allocator_type>;
@@ -1796,8 +1800,8 @@ class raw_hash_set {
     }
 
     ctrl_[i] = h;
-    constexpr size_t kClonedBytes = Group::kWidth - 1;
-    ctrl_[((i - kClonedBytes) & capacity_) + (kClonedBytes & capacity_)] = h;
+    ctrl_[((i - NumClonedBytes()) & capacity_) +
+          (NumClonedBytes() & capacity_)] = h;
   }
 
   size_t& growth_left() { return settings_.template get<0>(); }
@@ -1816,10 +1820,10 @@ class raw_hash_set {
   // TODO(alkis): Investigate removing some of these fields:
   // - ctrl/slots can be derived from each other
   // - size can be moved into the slot array
-  ctrl_t* ctrl_ = EmptyGroup();    // [(capacity + Group::kWidth) * ctrl_t]
-  slot_type* slots_ = nullptr;     // [capacity * slot_type]
-  size_t size_ = 0;                // number of full slots
-  size_t capacity_ = 0;            // total number of slots
+  ctrl_t* ctrl_ = EmptyGroup();  // [(capacity + 1 + NumClonedBytes()) * ctrl_t]
+  slot_type* slots_ = nullptr;   // [capacity * slot_type]
+  size_t size_ = 0;              // number of full slots
+  size_t capacity_ = 0;          // total number of slots
   absl::container_internal::CompressedTuple<size_t /* growth_left */,
                                             HashtablezInfoHandle, hasher,
                                             key_equal, allocator_type>
diff --git a/absl/random/internal/randen_hwaes.cc b/absl/random/internal/randen_hwaes.cc
index b5a3f90a..3738cc38 100644
--- a/absl/random/internal/randen_hwaes.cc
+++ b/absl/random/internal/randen_hwaes.cc
@@ -270,7 +270,7 @@ namespace {
 class Vector128 {
  public:
   // Convert from/to intrinsics.
-  inline explicit Vector128(const __m128i& Vector128) : data_(Vector128) {}
+  inline explicit Vector128(const __m128i& v) : data_(v) {}
 
   inline __m128i data() const { return data_; }
 
diff --git a/absl/status/status.cc b/absl/status/status.cc
index 5a5cd5c2..53c198e1 100644
--- a/absl/status/status.cc
+++ b/absl/status/status.cc
@@ -308,7 +308,7 @@ std::string Status::ToStringSlow(StatusToStringMode mode) const {
 }
 
 std::ostream& operator<<(std::ostream& os, const Status& x) {
-  os << x.ToString();
+  os << x.ToString(StatusToStringMode::kWithEverything);
   return os;
 }
 
diff --git a/absl/time/time.h b/absl/time/time.h
index 48982df4..7fa0f5c6 100644
--- a/absl/time/time.h
+++ b/absl/time/time.h
@@ -547,10 +547,20 @@ inline std::ostream& operator<<(std::ostream& os, Duration d) {
 // `ZeroDuration()`. Parses "inf" and "-inf" as +/- `InfiniteDuration()`.
 bool ParseDuration(absl::string_view dur_string, Duration* d);
 
-// Support for flag values of type Duration. Duration flags must be specified
-// in a format that is valid input for absl::ParseDuration().
+// AbslParseFlag()
+//
+// Parses a command-line flag string representation `text` into a a Duration
+// value. Duration flags must be specified in a format that is valid input for
+// `absl::ParseDuration()`.
 bool AbslParseFlag(absl::string_view text, Duration* dst, std::string* error);
+
+
+// AbslUnparseFlag()
+//
+// Unparses a Duration value into a command-line string representation using
+// the format specified by `absl::ParseDuration()`.
 std::string AbslUnparseFlag(Duration d);
+
 ABSL_DEPRECATED("Use AbslParseFlag() instead.")
 bool ParseFlag(const std::string& text, Duration* dst, std::string* error);
 ABSL_DEPRECATED("Use AbslUnparseFlag() instead.")
@@ -813,8 +823,12 @@ Time FromChrono(const std::chrono::system_clock::time_point& tp);
 //   // tp == std::chrono::system_clock::from_time_t(123);
 std::chrono::system_clock::time_point ToChronoTime(Time);
 
-// Support for flag values of type Time. Time flags must be specified in a
-// format that matches absl::RFC3339_full. For example:
+// AbslParseFlag()
+//
+// Parses the command-line flag string representation `text` into a Time value.
+// Time flags must be specified in a format that matches absl::RFC3339_full.
+//
+// For example:
 //
 //   --start_time=2016-01-02T03:04:05.678+08:00
 //
@@ -824,7 +838,13 @@ std::chrono::system_clock::time_point ToChronoTime(Time);
 // seconds/milliseconds/etc from the Unix epoch, use an absl::Duration flag
 // and add that duration to absl::UnixEpoch() to get an absl::Time.
 bool AbslParseFlag(absl::string_view text, Time* t, std::string* error);
+
+// AbslUnparseFlag()
+//
+// Unparses a Time value into a command-line string representation using
+// the format specified by `absl::ParseTime()`.
 std::string AbslUnparseFlag(Time t);
+
 ABSL_DEPRECATED("Use AbslParseFlag() instead.")
 bool ParseFlag(const std::string& text, Time* t, std::string* error);
 ABSL_DEPRECATED("Use AbslUnparseFlag() instead.")