Export of internal Abseil changes.

--
4e043a11b4c10a24e84046827ee16f47e11e35cc by Abseil Team <absl-team@google.com>:

Merge of https://github.com/abseil/abseil-cpp/pull/136

PiperOrigin-RevId: 218197648

--
e61f06e1e601061a443feaa8c5207c52437bd641 by Abseil Team <absl-team@google.com>:

Don't include <iostream> into int128, it's wasteful

Including iostream emits a global constructor for initializing std::cout and
friends, which isn't actually used by this file.

PiperOrigin-RevId: 218156386

--
8a6c82396e4c956be7f285328aec131cb4965f16 by Xiaoyi Zhang <zhangxy@google.com>:

Fix MSVC compiler warnings on discarding return values of functions with 'nodiscard'
attribute.

PiperOrigin-RevId: 217883401

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abf3e3a0f22bc4070df9dbc9a4ef4d883ed686bf by Tom Manshreck <shreck@google.com>:

Update public README to add new libraries

PiperOrigin-RevId: 217879399

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43b3b420a4e861711abbfbd497b8f2b3de17ec8c by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 217780963

--
1c8831947ca6a65a63842e6bd5f37a7c102a4e1b by Abseil Team <absl-team@google.com>:

Fix typo in a comment (missing comma in usage example).

PiperOrigin-RevId: 217776645
GitOrigin-RevId: 4e043a11b4c10a24e84046827ee16f47e11e35cc
Change-Id: I8999ae928da7a0030b4ecfd8d13da8522fdd013a

3 files changed, 11 insertions, 12 deletions

diff --git a/absl/strings/CMakeLists.txt b/absl/strings/CMakeLists.txt
index f3e4162387f1..dbb6ae6a4505 100644
--- a/absl/strings/CMakeLists.txt
+++ b/absl/strings/CMakeLists.txt
@@ -67,7 +67,7 @@ list(APPEND STRINGS_SRC
   ${STRINGS_PUBLIC_HEADERS}
   ${STRINGS_INTERNAL_HEADERS}
 )
-set(STRINGS_PUBLIC_LIBRARIES absl::base absl_throw_delegate)
+set(STRINGS_PUBLIC_LIBRARIES absl::base absl_internal_throw_delegate)
 
 absl_library(
   TARGET
@@ -207,7 +207,7 @@ absl_test(
 
 # test string_view_test
 set(STRING_VIEW_TEST_SRC "string_view_test.cc")
-set(STRING_VIEW_TEST_PUBLIC_LIBRARIES absl::strings absl_throw_delegate absl::base)
+set(STRING_VIEW_TEST_PUBLIC_LIBRARIES absl::strings absl_internal_throw_delegate absl::base)
 
 absl_test(
   TARGET
@@ -235,7 +235,7 @@ absl_test(
 
 # test str_replace_test
 set(STR_REPLACE_TEST_SRC "str_replace_test.cc")
-set(STR_REPLACE_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_throw_delegate)
+set(STR_REPLACE_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_internal_throw_delegate)
 
 absl_test(
   TARGET
@@ -249,7 +249,7 @@ absl_test(
 
 # test str_split_test
 set(STR_SPLIT_TEST_SRC "str_split_test.cc")
-set(STR_SPLIT_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_throw_delegate)
+set(STR_SPLIT_TEST_PUBLIC_LIBRARIES absl::strings absl::base absl_internal_throw_delegate)
 
 absl_test(
   TARGET
@@ -460,4 +460,3 @@ absl_test(
     absl::base
 )
 
-
diff --git a/absl/strings/string_view_benchmark.cc b/absl/strings/string_view_benchmark.cc
index fb46db18b3c3..f44203208fe4 100644
--- a/absl/strings/string_view_benchmark.cc
+++ b/absl/strings/string_view_benchmark.cc
@@ -151,7 +151,7 @@ void BM_find_string_view_len_one(benchmark::State& state) {
   std::string haystack(state.range(0), '0');
   absl::string_view s(haystack);
   for (auto _ : state) {
-    s.find("x");  // not present; length 1
+    benchmark::DoNotOptimize(s.find("x"));  // not present; length 1
   }
 }
 BENCHMARK(BM_find_string_view_len_one)->Range(1, 1 << 20);
@@ -160,7 +160,7 @@ void BM_find_string_view_len_two(benchmark::State& state) {
   std::string haystack(state.range(0), '0');
   absl::string_view s(haystack);
   for (auto _ : state) {
-    s.find("xx");  // not present; length 2
+    benchmark::DoNotOptimize(s.find("xx"));  // not present; length 2
   }
 }
 BENCHMARK(BM_find_string_view_len_two)->Range(1, 1 << 20);
@@ -169,7 +169,7 @@ void BM_find_one_char(benchmark::State& state) {
   std::string haystack(state.range(0), '0');
   absl::string_view s(haystack);
   for (auto _ : state) {
-    s.find('x');  // not present
+    benchmark::DoNotOptimize(s.find('x'));  // not present
   }
 }
 BENCHMARK(BM_find_one_char)->Range(1, 1 << 20);
@@ -178,7 +178,7 @@ void BM_rfind_one_char(benchmark::State& state) {
   std::string haystack(state.range(0), '0');
   absl::string_view s(haystack);
   for (auto _ : state) {
-    s.rfind('x');  // not present
+    benchmark::DoNotOptimize(s.rfind('x'));  // not present
   }
 }
 BENCHMARK(BM_rfind_one_char)->Range(1, 1 << 20);
@@ -193,7 +193,7 @@ void BM_worst_case_find_first_of(benchmark::State& state, int haystack_len) {
 
   absl::string_view s(haystack);
   for (auto _ : state) {
-    s.find_first_of(needle);
+    benchmark::DoNotOptimize(s.find_first_of(needle));
   }
 }
 
diff --git a/absl/strings/string_view_test.cc b/absl/strings/string_view_test.cc
index 217fda04b706..ed34ed83237c 100644
--- a/absl/strings/string_view_test.cc
+++ b/absl/strings/string_view_test.cc
@@ -678,9 +678,9 @@ TEST(StringViewTest, STL2Substr) {
   EXPECT_EQ(a.substr(23, absl::string_view::npos), c);
   // throw exception
 #ifdef ABSL_HAVE_EXCEPTIONS
-  EXPECT_THROW(a.substr(99, 2), std::out_of_range);
+  EXPECT_THROW((void)a.substr(99, 2), std::out_of_range);
 #else
-  EXPECT_DEATH(a.substr(99, 2), "absl::string_view::substr");
+  EXPECT_DEATH((void)a.substr(99, 2), "absl::string_view::substr");
 #endif
 }