From 5fcbe86e7ba65b6457d98764aa511c4f05c9435b Mon Sep 17 00:00:00 2001
From: Abseil Team <absl-team@google.com>
Date: Mon, 23 Oct 2017 11:40:35 -0700
Subject: Changes imported from Abseil "staging" branch:

  - 989557e6b443a81b5ad9bd0d0c704edbe96c09c9 Make InlinedVector::ShiftRight update the vector's size -... by Jon Cohen <cohenjon@google.com>
  - ffc2e2a6f169bbfa823890f21d13e16110cd0206 Fix issues when passing references aliasing into an Inlin... by Jon Cohen <cohenjon@google.com>
  - 2fce2f87043f8c044889b4aab828e6edc20da0d9 In C++14 or later, alias absl::make_unique to std::make_u... by Abseil Team <absl-team@google.com>
  - cb83e95b486c59fd6acfa956e97f42253dd158bd Roll back change to avoid weak virtual table warnings (-W... by Abseil Team <absl-team@google.com>
  - fb4ea46062895cb9340166c9dcc61ec4467bd834 Avoid weak virtual table warnings (-Wweak-vtables) and re... by Abseil Team <absl-team@google.com>

GitOrigin-RevId: 989557e6b443a81b5ad9bd0d0c704edbe96c09c9
Change-Id: I6b8119c3f16e9d0cb9b5fd6e750502c9dad8e257
---
 absl/memory/memory.h       |  4 ++++
 absl/memory/memory_test.cc | 10 ++++++++++
 2 files changed, 14 insertions(+)

(limited to 'absl/memory')

diff --git a/absl/memory/memory.h b/absl/memory/memory.h
index 95909138..15cd85f4 100644
--- a/absl/memory/memory.h
+++ b/absl/memory/memory.h
@@ -81,6 +81,9 @@ struct MakeUniqueResult<T[N]> {
 
 }  // namespace memory_internal
 
+#if __cplusplus >= 201402L || defined(_MSC_VER)
+using std::make_unique;
+#else
 // -----------------------------------------------------------------------------
 // Function Template: make_unique<T>()
 // -----------------------------------------------------------------------------
@@ -164,6 +167,7 @@ typename memory_internal::MakeUniqueResult<T>::array make_unique(size_t n) {
 template <typename T, typename... Args>
 typename memory_internal::MakeUniqueResult<T>::invalid make_unique(
     Args&&... /* args */) = delete;
+#endif
 
 // -----------------------------------------------------------------------------
 // Function Template: RawPtr()
diff --git a/absl/memory/memory_test.cc b/absl/memory/memory_test.cc
index 8a5f5522..7d047ca0 100644
--- a/absl/memory/memory_test.cc
+++ b/absl/memory/memory_test.cc
@@ -138,6 +138,16 @@ TEST(Make_UniqueTest, Array) {
   EXPECT_THAT(ArrayWatch::allocs(), ElementsAre(5 * sizeof(ArrayWatch)));
 }
 
+TEST(Make_UniqueTest, NotAmbiguousWithStdMakeUnique) {
+  // Ensure that absl::make_unique is not ambiguous with std::make_unique.
+  // In C++14 mode, the below call to make_unique has both types as candidates.
+  struct TakesStdType {
+    explicit TakesStdType(const std::vector<int> &vec) {}
+  };
+  using absl::make_unique;
+  make_unique<TakesStdType>(std::vector<int>());
+}
+
 #if 0
 // TODO(billydonahue): Make a proper NC test.
 // These tests shouldn't compile.
-- 
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