Specialize IsMoveOnlyType<T> for vectors.

base/bind_unittest.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 
 #include <memory>
 #include <utility>
+#include <vector>
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "build/build_config.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ skipping 758 matching lines @@
 
 TYPED_TEST(BindMoveOnlyTypeTest, UnboundForwarding) {
   int deletes = 0;
   TypeParam ptr(new DeleteCounter(&deletes));
   // Test unbound argument forwarding.
   Callback<TypeParam(TypeParam)> cb_unbound = Bind(&PassThru<TypeParam>);
   cb_unbound.Run(std::move(ptr));
   EXPECT_EQ(1, deletes);
 }
 
+void VerifyVector(const std::vector<scoped_ptr<int>>& v) {
+  ASSERT_EQ(1u, v.size());
+  EXPECT_EQ(12345, *v[0]);
+}
+
+std::vector<scoped_ptr<int>> AcceptAndReturnMoveOnlyVector(
+    std::vector<scoped_ptr<int>> v) {
+  VerifyVector(v);
+  return v;
+}
+
+// Test that a vector containing move-only types can be used with Callback.
+TEST_F(BindTest, BindMoveOnlyVector) {
+  using MoveOnlyVector = std::vector<scoped_ptr<int>>;
+
+  MoveOnlyVector v;
+  v.push_back(make_scoped_ptr(new int(12345)));
+
+  // Early binding should work:
+  base::Callback<MoveOnlyVector()> bound_cb =
+      base::Bind(&AcceptAndReturnMoveOnlyVector, Passed(&v));
+  MoveOnlyVector intermediate_result = bound_cb.Run();
+  VerifyVector(intermediate_result);
+
+  // As should passing it as an argument to Run():
+  base::Callback<MoveOnlyVector(MoveOnlyVector)> unbound_cb =
+      base::Bind(&AcceptAndReturnMoveOnlyVector);
+  MoveOnlyVector final_result = unbound_cb.Run(std::move(intermediate_result));
+  VerifyVector(final_result);
+}
+
 // Argument Copy-constructor usage for non-reference parameters.
 //   - Bound arguments are only copied once.
 //   - Forwarded arguments are only copied once.
 //   - Forwarded arguments with coercions are only copied twice (once for the
 //     coercion, and one for the final dispatch).
 TEST_F(BindTest, ArgumentCopies) {
   int copies = 0;
   int assigns = 0;
 
   CopyCounter counter(&copies, &assigns);
@@ skipping 55 matching lines @@
   base::Callback<void(int)> null_cb;
   ASSERT_TRUE(null_cb.is_null());
   EXPECT_DEATH(base::Bind(null_cb, 42), "");
 }
 
 #endif  // (!defined(NDEBUG) || defined(DCHECK_ALWAYS_ON)) &&
         //     GTEST_HAS_DEATH_TEST
 
 }  // namespace
 }  // namespace base