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-rw-r--r--third_party/base/nonstd_unique_ptr.h14
-rw-r--r--third_party/base/nonstd_unique_ptr_unittest.cpp87
2 files changed, 101 insertions, 0 deletions
diff --git a/third_party/base/nonstd_unique_ptr.h b/third_party/base/nonstd_unique_ptr.h
index 1d1c43f42f..d666e1eeb2 100644
--- a/third_party/base/nonstd_unique_ptr.h
+++ b/third_party/base/nonstd_unique_ptr.h
@@ -176,6 +176,13 @@ class unique_ptr : public unique_ptr_base<C> {
}
}
+ // Move assignment.
+ unique_ptr<C>& operator=(unique_ptr<C>&& that) {
+ if (that.ptr_ != ptr_)
+ reset(that.release());
+ return *this;
+ }
+
private:
// Forbid comparison of unique_ptr types. If C2 != C, it totally doesn't
// make sense, and if C2 == C, it still doesn't make sense because you should
@@ -222,6 +229,13 @@ class unique_ptr<C[]> : public unique_ptr_base<C> {
}
}
+ // Move assignment.
+ unique_ptr<C>& operator=(unique_ptr<C>&& that) {
+ if (that.ptr_ != ptr_)
+ reset(that.release());
+ return *this;
+ }
+
// Support indexing since it is holding array.
C& operator[] (size_t i) { return ptr_[i]; }
diff --git a/third_party/base/nonstd_unique_ptr_unittest.cpp b/third_party/base/nonstd_unique_ptr_unittest.cpp
new file mode 100644
index 0000000000..49cc901fe2
--- /dev/null
+++ b/third_party/base/nonstd_unique_ptr_unittest.cpp
@@ -0,0 +1,87 @@
+// Copyright 2015 PDFium 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 <sstream>
+
+#include "testing/gtest/include/gtest/gtest.h"
+#include "macros.h"
+#include "nonstd_unique_ptr.h"
+
+using nonstd::unique_ptr;
+
+namespace {
+
+// Used to test depth subtyping.
+class CtorDtorLoggerParent {
+ public:
+ virtual ~CtorDtorLoggerParent() {}
+
+ virtual void SetPtr(int* ptr) = 0;
+
+ virtual int SomeMeth(int x) const = 0;
+};
+
+class CtorDtorLogger : public CtorDtorLoggerParent {
+ public:
+ CtorDtorLogger() : ptr_(nullptr) {}
+ explicit CtorDtorLogger(int* ptr) { SetPtr(ptr); }
+ ~CtorDtorLogger() override { --*ptr_; }
+
+ void SetPtr(int* ptr) override {
+ ptr_ = ptr;
+ ++*ptr_;
+ }
+
+ int SomeMeth(int x) const override { return x; }
+
+ private:
+ int* ptr_;
+
+ // Disallow evil constructors.
+ CtorDtorLogger(const CtorDtorLogger&) = delete;
+ void operator=(const CtorDtorLogger&) = delete;
+};
+
+struct CountingDeleter {
+ explicit CountingDeleter(int* count) : count_(count) {}
+ inline void operator()(double* ptr) const { (*count_)++; }
+ int* count_;
+};
+
+// Do not delete this function! It's existence is to test that you can
+// return a temporarily constructed version of the scoper.
+unique_ptr<CtorDtorLogger> TestReturnOfType(int* constructed) {
+ return unique_ptr<CtorDtorLogger>(new CtorDtorLogger(constructed));
+}
+
+} // namespace
+
+TEST(UniquePtrTest, MoveTest) {
+ int constructed = 0;
+ int constructed4 = 0;
+ {
+ unique_ptr<CtorDtorLogger> ptr1(new CtorDtorLogger(&constructed));
+ EXPECT_EQ(1, constructed);
+ EXPECT_TRUE(ptr1);
+
+ unique_ptr<CtorDtorLogger> ptr2(nonstd::move(ptr1));
+ EXPECT_EQ(1, constructed);
+ EXPECT_FALSE(ptr1);
+ EXPECT_TRUE(ptr2);
+
+ unique_ptr<CtorDtorLogger> ptr3;
+ ptr3 = nonstd::move(ptr2);
+ EXPECT_EQ(1, constructed);
+ EXPECT_FALSE(ptr2);
+ EXPECT_TRUE(ptr3);
+
+ unique_ptr<CtorDtorLogger> ptr4(new CtorDtorLogger(&constructed4));
+ EXPECT_EQ(1, constructed4);
+ ptr4 = nonstd::move(ptr3);
+ EXPECT_EQ(0, constructed4);
+ EXPECT_FALSE(ptr3);
+ EXPECT_TRUE(ptr4);
+ }
+ EXPECT_EQ(0, constructed);
+}