Add skstd::unique_ptr and use it.

tests/CPlusPlusEleven.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Test.h"
+#include "SkTemplates.h"
+#include "SkFunction.h"
 
 namespace {
-template <class T> T&& Move(T& o) { return static_cast<T&&>(o); }
-
 class Moveable {
 public:
     Moveable() {}
     Moveable(Moveable&&) {}
     Moveable& operator=(Moveable&&) { return *this; }
 private:
     Moveable(const Moveable&);
     Moveable& operator=(const Moveable&);
 };
+template <typename T> void deleter(T*) { }
+template <typename T> struct Deleter {
+    void operator()(T*) { }
+};
 } // namespace
 
 DEF_TEST(CPlusPlusEleven_RvalueAndMove, r) {
-    Moveable src1; Moveable dst1(Move(src1));
-    Moveable src2, dst2; dst2 = Move(src2);
+    Moveable src1; Moveable dst1(skstd::move(src1));
+    Moveable src2, dst2; dst2 = skstd::move(src2);
 }
+
+#define TOO_BIG "The unique_ptr was bigger than expected."
+#define WEIRD_SIZE "The unique_ptr was a different size than expected."
+
+DEF_TEST(CPlusPlusEleven_UniquePtr, r) {
+    struct SmallUniquePtr {
+        Moveable* p;
+    };
+    struct BigUniquePtr {
+        void(*d)(Moveable*);
+        Moveable* p;
+    };
+
+    static_assert(sizeof(skstd::unique_ptr<Moveable>) == sizeof(SmallUniquePtr), TOO_BIG);
+    static_assert(sizeof(skstd::unique_ptr<Moveable[]>) == sizeof(SmallUniquePtr), TOO_BIG);
+
+    using proc = void(*)(Moveable*);
+    static_assert(sizeof(skstd::unique_ptr<Moveable, proc>) == sizeof(BigUniquePtr), WEIRD_SIZE);
+    static_assert(sizeof(skstd::unique_ptr<Moveable[], proc>) == sizeof(BigUniquePtr), WEIRD_SIZE);
+
+    {
+        skstd::unique_ptr<Moveable, void(*)(Moveable*)> u(nullptr, deleter<Moveable>);
+        static_assert(sizeof(u) == sizeof(BigUniquePtr), WEIRD_SIZE);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(BigUniquePtr), WEIRD_SIZE);
+    }
+
+    {
+        skstd::unique_ptr<Moveable, void(*)(Moveable*)> u(nullptr, [](Moveable* m){ deleter(m); });
+        static_assert(sizeof(u) == sizeof(BigUniquePtr), WEIRD_SIZE);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(BigUniquePtr), WEIRD_SIZE);
+    }
+
+    {
+        auto d = [](Moveable* m){ deleter(m); };
+        skstd::unique_ptr<Moveable, decltype(d)> u(nullptr, d);
+        static_assert(sizeof(u) == sizeof(SmallUniquePtr), TOO_BIG);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(SmallUniquePtr), TOO_BIG);
+    }
+
+    {
+        skstd::unique_ptr<Moveable, Deleter<Moveable>> u(nullptr, Deleter<Moveable>());
+        static_assert(sizeof(u) == sizeof(SmallUniquePtr), TOO_BIG);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(SmallUniquePtr), TOO_BIG);
+    }
+
+    {
+        skstd::unique_ptr<Moveable, Deleter<Moveable>> u(new Moveable(), Deleter<Moveable>());

[bungeman-skia, 2015/09/03 23:15:17]

Need to make sure this 'new' is actually deleted.

+        static_assert(sizeof(u) == sizeof(SmallUniquePtr), TOO_BIG);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(SmallUniquePtr), TOO_BIG);
+    }
+}