.

tools/clang/plugins/tests/base_passed.cpp

+#define MOVE_ONLY_TYPE_FOR_CPP_03(type, rvalue_type) \
+ public: \
+  struct rvalue_type { \
+    explicit rvalue_type(type* object) : object(object) {} \
+    type* object; \
+  }; \
+  type(type&); \
+  void operator=(type&); \
+  operator rvalue_type() { return rvalue_type(this); } \
+  type Pass() { return type(rvalue_type(this)); } \
+  typedef void MoveOnlyTypeForCPP03; \
+ private:
+
+namespace base {
+template <class T>
+class scoped_ptr {
+  MOVE_ONLY_TYPE_FOR_CPP_03(scoped_ptr, RValue)
+ public:
+  typedef T element_type;
+  scoped_ptr() { }
+  explicit scoped_ptr(element_type* p) { }
+  scoped_ptr(RValue rvalue) { }
+  template <typename U>
+  scoped_ptr& operator=(scoped_ptr<U> rhs) { return *this; }
+  element_type* get() const { return 0; }
+};
+
+template <typename T>
+static inline T Passed(T scoper) {
+  return scoper.Pass();
+}
+template <typename T>
+static inline T Passed(T* scoper) {
+  return scoper->Pass();
+}
+
+}

[awong, 2014/09/04 00:29:51]

}  // namespace base

+
+void f_bad(base::scoped_ptr<int> i, int* p) {}
+
+void f_ok(base::scoped_ptr<int> i) {}
+
+int h_bad1(base::scoped_ptr<int> i) { return 0; }
+int h_bad2(int* i) { return 0; }
+int h(int a, int b) { return 0; }
+
+void g() {
+  base::scoped_ptr<int> s;
+
+  f_bad(base::Passed(&s), s.get());
+  // FIXME: Do I also have to catch (no &)?

[awong, 2014/09/04 00:29:51]

Yes, but your syntax is wrong. base::Passed(s.Pass()).

+  //f(base::Passed(s), s.get());
+
+  // Shouldn't warn.
+  f_ok(base::Passed(&s));
+
+  h(h_bad1(base::Passed(&s)),
+    h_bad2(s.get()));
+}