Export of internal Abseil changes.

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425305bdac5c84a2b7b61d65aee90e4d9d1c29a0 by Abseil Team <absl-team@google.com>:

Change a comment about hex strings to use lowercase 'a' and 'f' characters, since StrCat(Hex()) produces lowercase hex characters.

PiperOrigin-RevId: 236763001

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2a312da1c2e46da3bdece0c322c4cd37356bb9aa by Samuel Benzaquen <sbenza@google.com>:

Enable more tests for non-std containers by default.
Add more tests for typedefs and other members.

PiperOrigin-RevId: 236652269

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5d5abd4d8e8e03d3c924675550a9584325b18732 by Eric Fiselier <ericwf@google.com>:

Fix incorrect detection of unavailable C++17 types.

Using <any> on OS X has complications, because it is
present but marked "unavailable" due to dylib compatibility
reasons.

The dance we did to detect availability was correct
on OS X, but accidentally clobbered all other platforms
for not being Apple.

This patch corrects the detection.

PiperOrigin-RevId: 236651217
GitOrigin-RevId: 425305bdac5c84a2b7b61d65aee90e4d9d1c29a0
Change-Id: Ib922ce003422781aec169ea169d8fb15292ccd85

1 files changed, 85 insertions, 0 deletions

diff --git a/absl/container/internal/unordered_map_members_test.h b/absl/container/internal/unordered_map_members_test.h
new file mode 100644
index 000000000000..5c9a799c4734
--- /dev/null
+++ b/absl/container/internal/unordered_map_members_test.h
@@ -0,0 +1,85 @@
+// Copyright 2019 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#ifndef ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MEMBERS_TEST_H_
+#define ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MEMBERS_TEST_H_
+
+#include <type_traits>
+#include "gmock/gmock.h"
+#include "gtest/gtest.h"
+#include "absl/meta/type_traits.h"
+
+namespace absl {
+namespace container_internal {
+
+template <class UnordMap>
+class MembersTest : public ::testing::Test {};
+
+TYPED_TEST_SUITE_P(MembersTest);
+
+template <typename T>
+void UseType() {}
+
+TYPED_TEST_P(MembersTest, Typedefs) {
+  EXPECT_TRUE((std::is_same<std::pair<const typename TypeParam::key_type,
+                                      typename TypeParam::mapped_type>,
+                            typename TypeParam::value_type>()));
+  EXPECT_TRUE((absl::conjunction<
+               absl::negation<std::is_signed<typename TypeParam::size_type>>,
+               std::is_integral<typename TypeParam::size_type>>()));
+  EXPECT_TRUE((absl::conjunction<
+               std::is_signed<typename TypeParam::difference_type>,
+               std::is_integral<typename TypeParam::difference_type>>()));
+  EXPECT_TRUE((std::is_convertible<
+               decltype(std::declval<const typename TypeParam::hasher&>()(
+                   std::declval<const typename TypeParam::key_type&>())),
+               size_t>()));
+  EXPECT_TRUE((std::is_convertible<
+               decltype(std::declval<const typename TypeParam::key_equal&>()(
+                   std::declval<const typename TypeParam::key_type&>(),
+                   std::declval<const typename TypeParam::key_type&>())),
+               bool>()));
+  EXPECT_TRUE((std::is_same<typename TypeParam::allocator_type::value_type,
+                            typename TypeParam::value_type>()));
+  EXPECT_TRUE((std::is_same<typename TypeParam::value_type&,
+                            typename TypeParam::reference>()));
+  EXPECT_TRUE((std::is_same<const typename TypeParam::value_type&,
+                            typename TypeParam::const_reference>()));
+  EXPECT_TRUE((std::is_same<typename std::allocator_traits<
+                                typename TypeParam::allocator_type>::pointer,
+                            typename TypeParam::pointer>()));
+  EXPECT_TRUE(
+      (std::is_same<typename std::allocator_traits<
+                        typename TypeParam::allocator_type>::const_pointer,
+                    typename TypeParam::const_pointer>()));
+}
+
+TYPED_TEST_P(MembersTest, SimpleFunctions) {
+  EXPECT_GT(TypeParam().max_size(), 0);
+}
+
+TYPED_TEST_P(MembersTest, BeginEnd) {
+  TypeParam t = {typename TypeParam::value_type{}};
+  EXPECT_EQ(t.begin(), t.cbegin());
+  EXPECT_EQ(t.end(), t.cend());
+  EXPECT_NE(t.begin(), t.end());
+  EXPECT_NE(t.cbegin(), t.cend());
+}
+
+REGISTER_TYPED_TEST_SUITE_P(MembersTest, Typedefs, SimpleFunctions, BeginEnd);
+
+}  // namespace container_internal
+}  // namespace absl
+
+#endif  // ABSL_CONTAINER_INTERNAL_UNORDERED_MAP_MEMBERS_TEST_H_