Export of internal Abseil changes.

--
6bab63b2bcdbd768743c2ebcc4a8e19af20c5406 by Abseil Team <absl-team@google.com>:

Reformats inlined_vector.h to match the current Google lint rules

PiperOrigin-RevId: 202154101

--
00cdeda6ea24591a9cb8ac8b3c2e2a042e1b15b1 by Gennadiy Rozental <rogeeff@google.com>:

Improve SplitterIsConvertibleTo implementation.

PiperOrigin-RevId: 202095009

--
7c24071afac45a17c47e819896f844a36e239bda by Greg Falcon <gfalcon@google.com>:

Internal change

PiperOrigin-RevId: 201991288
GitOrigin-RevId: 6bab63b2bcdbd768743c2ebcc4a8e19af20c5406
Change-Id: Ic5a988ab39e78247285411f36287cd34d6f5afd3

7 files changed, 65 insertions, 20 deletions

diff --git a/absl/base/BUILD.bazel b/absl/base/BUILD.bazel
index d117a4fe..35414a25 100644
--- a/absl/base/BUILD.bazel
+++ b/absl/base/BUILD.bazel
@@ -387,6 +387,7 @@ cc_test(
         "//absl:windows": [],
         "//conditions:default": ["-pthread"],
     }),
+    tags = ["no_test_ios_x86_64"],
     deps = [":malloc_internal"],
 )
 
diff --git a/absl/container/inlined_vector.h b/absl/container/inlined_vector.h
index 101ded85..03660f16 100644
--- a/absl/container/inlined_vector.h
+++ b/absl/container/inlined_vector.h
@@ -645,12 +645,12 @@ class InlinedVector {
   class AllocatorAndTag : private allocator_type {
    public:
     explicit AllocatorAndTag(const allocator_type& a, Tag t = Tag())
-        : allocator_type(a), tag_(t) {
-    }
+        : allocator_type(a), tag_(t) {}
     Tag& tag() { return tag_; }
     const Tag& tag() const { return tag_; }
     allocator_type& allocator() { return *this; }
     const allocator_type& allocator() const { return *this; }
+
    private:
     Tag tag_;
   };
@@ -696,19 +696,13 @@ class InlinedVector {
     return reinterpret_cast<const value_type*>(&rep_.inlined_storage.inlined);
   }
 
-  value_type* allocated_space() {
-    return allocation().buffer();
-  }
-  const value_type* allocated_space() const {
-    return allocation().buffer();
-  }
+  value_type* allocated_space() { return allocation().buffer(); }
+  const value_type* allocated_space() const { return allocation().buffer(); }
 
   const allocator_type& allocator() const {
     return allocator_and_tag_.allocator();
   }
-  allocator_type& allocator() {
-    return allocator_and_tag_.allocator();
-  }
+  allocator_type& allocator() { return allocator_and_tag_.allocator(); }
 
   bool allocated() const { return tag().allocated(); }
 
@@ -1128,8 +1122,7 @@ void InlinedVector<T, N, A>::swap(InlinedVector& other) {
     const size_type b_size = b->size();
     assert(a_size >= b_size);
     // 'a' is larger. Swap the elements up to the smaller array size.
-    std::swap_ranges(a->inlined_space(),
-                     a->inlined_space() + b_size,
+    std::swap_ranges(a->inlined_space(), a->inlined_space() + b_size,
                      b->inlined_space());
 
     // Move the remaining elements: A[b_size,a_size) -> B[b_size,a_size)
@@ -1273,8 +1266,7 @@ void InlinedVector<T, N, A>::Destroy(value_type* ptr, value_type* ptr_last) {
   // scribbling on a vtable pointer.
 #ifndef NDEBUG
   if (ptr != ptr_last) {
-    memset(reinterpret_cast<void*>(ptr), 0xab,
-           sizeof(*ptr) * (ptr_last - ptr));
+    memset(reinterpret_cast<void*>(ptr), 0xab, sizeof(*ptr) * (ptr_last - ptr));
   }
 #endif
 }
@@ -1302,8 +1294,9 @@ void InlinedVector<T, N, A>::AssignRange(Iter first, Iter last,
   // Optimized to avoid reallocation.
   // Prefer reassignment to copy construction for elements.
   iterator out = begin();
-  for ( ; first != last && out != end(); ++first, ++out)
+  for (; first != last && out != end(); ++first, ++out) {
     *out = *first;
+  }
   erase(out, end());
   std::copy(first, last, std::back_inserter(*this));
 }
diff --git a/absl/strings/BUILD.bazel b/absl/strings/BUILD.bazel
index 3e50d24a..17831c20 100644
--- a/absl/strings/BUILD.bazel
+++ b/absl/strings/BUILD.bazel
@@ -486,6 +486,9 @@ cc_test(
     srcs = [
         "charconv_benchmark.cc",
     ],
+    tags = [
+        "benchmark",
+    ],
     deps = [
         ":strings",
         "//absl/base",
diff --git a/absl/strings/internal/str_split_internal.h b/absl/strings/internal/str_split_internal.h
index a1b10f3a..9cf0833f 100644
--- a/absl/strings/internal/str_split_internal.h
+++ b/absl/strings/internal/str_split_internal.h
@@ -228,14 +228,31 @@ struct IsInitializerList
 // compiled in C++11 will get an error due to ambiguous conversion paths (in
 // C++11 std::vector<T>::operator= is overloaded to take either a std::vector<T>
 // or an std::initializer_list<T>).
+
+template <typename C, bool has_value_type, bool has_mapped_type>
+struct SplitterIsConvertibleToImpl : std::false_type {};
+
+template <typename C>
+struct SplitterIsConvertibleToImpl<C, true, false>
+    : std::is_constructible<typename C::value_type, absl::string_view> {};
+
+template <typename C>
+struct SplitterIsConvertibleToImpl<C, true, true>
+    : absl::conjunction<
+          std::is_constructible<typename C::key_type, absl::string_view>,
+          std::is_constructible<typename C::mapped_type, absl::string_view>> {};
+
 template <typename C>
 struct SplitterIsConvertibleTo
-    : std::enable_if<
+    : SplitterIsConvertibleToImpl<
+          C,
 #ifdef _GLIBCXX_DEBUG
           !IsStrictlyBaseOfAndConvertibleToSTLContainer<C>::value &&
 #endif  // _GLIBCXX_DEBUG
-          !IsInitializerList<C>::value && HasValueType<C>::value &&
-          HasConstIterator<C>::value> {
+              !IsInitializerList<
+                  typename std::remove_reference<C>::type>::value &&
+              HasValueType<C>::value && HasConstIterator<C>::value,
+          HasMappedType<C>::value> {
 };
 
 // This class implements the range that is returned by absl::StrSplit(). This
@@ -281,7 +298,8 @@ class Splitter {
   // An implicit conversion operator that is restricted to only those containers
   // that the splitter is convertible to.
   template <typename Container,
-            typename OnlyIf = typename SplitterIsConvertibleTo<Container>::type>
+            typename = typename std::enable_if<
+                SplitterIsConvertibleTo<Container>::value>::type>
   operator Container() const {  // NOLINT(runtime/explicit)
     return ConvertToContainer<Container, typename Container::value_type,
                               HasMappedType<Container>::value>()(*this);
diff --git a/absl/strings/str_split_test.cc b/absl/strings/str_split_test.cc
index c172a762..c6898863 100644
--- a/absl/strings/str_split_test.cc
+++ b/absl/strings/str_split_test.cc
@@ -37,6 +37,34 @@ using ::testing::ElementsAre;
 using ::testing::Pair;
 using ::testing::UnorderedElementsAre;
 
+TEST(Split, TraitsTest) {
+  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<int>::value,
+                "");
+  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<std::string>::value,
+                "");
+  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
+                    std::vector<std::string>>::value,
+                "");
+  static_assert(
+      !absl::strings_internal::SplitterIsConvertibleTo<std::vector<int>>::value,
+      "");
+  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
+                    std::vector<absl::string_view>>::value,
+                "");
+  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
+                    std::map<std::string, std::string>>::value,
+                "");
+  static_assert(absl::strings_internal::SplitterIsConvertibleTo<
+                    std::map<absl::string_view, absl::string_view>>::value,
+                "");
+  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<
+                    std::map<int, std::string>>::value,
+                "");
+  static_assert(!absl::strings_internal::SplitterIsConvertibleTo<
+                    std::map<std::string, int>>::value,
+                "");
+}
+
 // This tests the overall split API, which is made up of the absl::StrSplit()
 // function and the Delimiter objects in the absl:: namespace.
 // This TEST macro is outside of any namespace to require full specification of
diff --git a/absl/synchronization/BUILD.bazel b/absl/synchronization/BUILD.bazel
index 372874e1..8d302e01 100644
--- a/absl/synchronization/BUILD.bazel
+++ b/absl/synchronization/BUILD.bazel
@@ -225,6 +225,7 @@ cc_test(
         "//absl:windows": [],
         "//conditions:default": ["-pthread"],
     }),
+    tags = ["no_test_ios_x86_64"],
     deps = [
         ":synchronization",
         "//absl/base",
diff --git a/absl/types/BUILD.bazel b/absl/types/BUILD.bazel
index 10f6c4d2..096c119e 100644
--- a/absl/types/BUILD.bazel
+++ b/absl/types/BUILD.bazel
@@ -256,6 +256,7 @@ cc_test(
         "variant_benchmark.cc",
     ],
     copts = ABSL_TEST_COPTS,
+    tags = ["benchmark"],
     deps = [
         ":variant",
         "//absl/utility",