Export of internal Abseil changes.

--
babbb6421068af3831870fd5995444437ace6769 by Derek Mauro <dmauro@google.com>:

Rollback of:

Make raw_hash_set_test less flaky.

Split the timing loop into chunks so that we are less suceptible to
antogantistic processes.

PiperOrigin-RevId: 243854490

--
a2711f17a712f6d09799bf32363d67526737b486 by CJ Johnson <johnsoncj@google.com>:

Relocates IsAtLeastForwardIterator to internal/inlined_vector.h

PiperOrigin-RevId: 243846090

--
6c14cdbeb9a61022c27f8957654f930d8abf2fc1 by Matt Kulukundis <kfm@google.com>:

Make raw_hash_set_test less flaky.

Split the timing loop into chunks so that we are less suceptible to
antogantistic processes.

PiperOrigin-RevId: 243824289

--
ee6072a6b6e0ac653622524ceb09db3b9e870f96 by Samuel Benzaquen <sbenza@google.com>:

Improve format parser performance.
Replace the main switch with a lookup in the existing tag table.
Improve the ABI of ConsumeUnboundConversion a little.

PiperOrigin-RevId: 243824112

--
24b9e6476dfa4be8d644359eab8ac6816492f187 by Abseil Team <absl-team@google.com>:

Fix DR numbers: 3800 ? 3080, 3801 ? 3081.

PiperOrigin-RevId: 243804213

--
0660404074707e197684f07cc0bffe4a9c35cd2f by Abseil Team <absl-team@google.com>:

Internal change.

PiperOrigin-RevId: 243757359

--
ba0f5bb9b8584d75c4ffc44ff3cb8c691796ffc6 by Xiaoyi Zhang <zhangxy@google.com>:

Consolidate ABSL_INTERNAL_UNALIGNED_* implementation into memcpy.
The compiler should be good enough to optimize these operations.
See https://github.com/abseil/abseil-cpp/issues/269 for background.

PiperOrigin-RevId: 243323941

--
00853a8756548df7217513c562d604b4ee5c6ab9 by Eric Fiselier <ericwf@google.com>:

Reexport memory.h from optional.h for compatibility between libc++ and
libstdc++.

PiperOrigin-RevId: 243313425
GitOrigin-RevId: babbb6421068af3831870fd5995444437ace6769
Change-Id: Ic53c127ad857a431ad60c98b27cc585fed50a3e3

absl/strings/internal/str_format/parser_test.cc

@@ -1,6 +1,8 @@
 #include "absl/strings/internal/str_format/parser.h"
 
 #include <string.h>
+
+#include "gmock/gmock.h"
 #include "gtest/gtest.h"
 #include "absl/base/macros.h"
 
@@ -9,6 +11,8 @@ namespace str_format_internal {
 
 namespace {
 
+using testing::Pair;
+
 TEST(LengthModTest, Names) {
   struct Expectation {
     int line;
@@ -63,20 +67,21 @@ TEST(ConversionCharTest, Names) {
 
 class ConsumeUnboundConversionTest : public ::testing::Test {
  public:
-  typedef UnboundConversion Props;
-  string_view Consume(string_view* src) {
+  std::pair<string_view, string_view> Consume(string_view src) {
     int next = 0;
-    const char* prev_begin = src->data();
     o = UnboundConversion();  // refresh
-    ConsumeUnboundConversion(src, &o, &next);
-    return {prev_begin, static_cast<size_t>(src->data() - prev_begin)};
+    const char* p = ConsumeUnboundConversion(
+        src.data(), src.data() + src.size(), &o, &next);
+    if (!p) return {{}, src};
+    return {string_view(src.data(), p - src.data()),
+            string_view(p, src.data() + src.size() - p)};
   }
 
   bool Run(const char *fmt, bool force_positional = false) {
-    string_view src = fmt;
     int next = force_positional ? -1 : 0;
     o = UnboundConversion();  // refresh
-    return ConsumeUnboundConversion(&src, &o, &next) && src.empty();
+    return ConsumeUnboundConversion(fmt, fmt + strlen(fmt), &o, &next) ==
+           fmt + strlen(fmt);
   }
   UnboundConversion o;
 };
@@ -104,11 +109,7 @@ TEST_F(ConsumeUnboundConversionTest, ConsumeSpecification) {
   };
   for (const auto& e : kExpect) {
     SCOPED_TRACE(e.line);
-    string_view src = e.src;
-    EXPECT_EQ(e.src, src);
-    string_view out = Consume(&src);
-    EXPECT_EQ(e.out, out);
-    EXPECT_EQ(e.src_post, src);
+    EXPECT_THAT(Consume(e.src), Pair(e.out, e.src_post));
   }
 }