SkTScopedComPtr: implicit nullptr cast to SkTScopedComPtr<T>()

Change-Id: Ic09da242650eb20164f31333e912fc899428c548
Reviewed-on: https://skia-review.googlesource.com/7634
Reviewed-by: Ben Wagner <bungeman@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/src/utils/win/SkTScopedComPtr.h b/src/utils/win/SkTScopedComPtr.h
index b8aeb73d82..f44740ff44 100644
--- a/src/utils/win/SkTScopedComPtr.h
+++ b/src/utils/win/SkTScopedComPtr.h
@@ -37,17 +37,20 @@ private:
     T *fPtr;
 
 public:
-    explicit SkTScopedComPtr(T *ptr = nullptr) : fPtr(ptr) { }
+    constexpr SkTScopedComPtr() : fPtr(nullptr) {}
+    constexpr SkTScopedComPtr(std::nullptr_t) : fPtr(nullptr) {}
+    explicit SkTScopedComPtr(T *ptr) : fPtr(ptr) {}
+    SkTScopedComPtr(SkTScopedComPtr&& that) : fPtr(that.release()) {}
+    SkTScopedComPtr(const SkTScopedComPtr&) = delete;
 
     ~SkTScopedComPtr() { this->reset();}
 
-    SkTScopedComPtr(SkTScopedComPtr&& that) : fPtr(that.release()) {}
-    SkTScopedComPtr(const SkTScopedComPtr&) = delete;
     SkTScopedComPtr& operator=(SkTScopedComPtr&& that) {
         this->reset(that.release());
         return *this;
     }
     SkTScopedComPtr& operator=(const SkTScopedComPtr&) = delete;
+    SkTScopedComPtr& operator=(std::nullptr_t) { this->reset(); return *this; }
 
     T &operator*() const { SkASSERT(fPtr != nullptr); return *fPtr; }