Add skstd::unique_ptr and use it.

tests/CPlusPlusEleven.cpp

Index: tests/CPlusPlusEleven.cpp
diff --git a/tests/CPlusPlusEleven.cpp b/tests/CPlusPlusEleven.cpp
index 41821126ad8cd180d6c63a87bd3b27ab6f8751dd..4f74b80225d4e7e1e5742c32f95058c8aa81583e 100644
--- a/tests/CPlusPlusEleven.cpp
+++ b/tests/CPlusPlusEleven.cpp
@@ -5,10 +5,10 @@
  * 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() {}
@@ -18,9 +18,82 @@ private:
     Moveable(const Moveable&);
     Moveable& operator=(const Moveable&);
 };
+template <typename T> void deleter(T*) { }
+template <typename T> struct Deleter {
+    void operator()(T* t) { delete static_cast<const Moveable*>(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>());
+        static_assert(sizeof(u) == sizeof(SmallUniquePtr), TOO_BIG);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(SmallUniquePtr), TOO_BIG);
+    }
+
+    {
+        skstd::unique_ptr<const void, Deleter<const void>> u(new Moveable(), Deleter<const void>());
+        static_assert(sizeof(u) == sizeof(SmallUniquePtr), TOO_BIG);
+
+        auto u2 = skstd::move(u);
+        static_assert(sizeof(u2) == sizeof(SmallUniquePtr), TOO_BIG);
+    }
 }