[cplusplus] Add unique_ptr
diff --git a/src/hb-cplusplus.hh b/src/hb-cplusplus.hh
index 7612252..86d0452 100644
--- a/src/hb-cplusplus.hh
+++ b/src/hb-cplusplus.hh
@@ -58,7 +58,7 @@
shared_ptr (const shared_ptr &o) : p (v::reference (o.p)) {}
shared_ptr (shared_ptr &&o) : p (o.p) { o.p = nullptr; }
shared_ptr& operator = (const shared_ptr &o) { if (p != o.p) { destroy (); p = o.p; reference (); } return *this; }
- shared_ptr& operator = (shared_ptr &&o) { destroy (); p = o.p; o.p = nullptr; return *this; }
+ shared_ptr& operator = (shared_ptr &&o) { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
~shared_ptr () { v::destroy (p); p = nullptr; }
T* get() const { return p; }
@@ -89,6 +89,38 @@
template<typename T> struct is_shared_ptr : std::false_type {};
template<typename T> struct is_shared_ptr<shared_ptr<T>> : std::true_type {};
+template <typename T>
+struct unique_ptr
+{
+ using element_type = T;
+
+ using v = vtable<T>;
+
+ explicit unique_ptr (T *p = nullptr) : p (p) {}
+ unique_ptr (const unique_ptr &o) = delete;
+ unique_ptr (unique_ptr &&o) : p (o.p) { o.p = nullptr; }
+ unique_ptr& operator = (const unique_ptr &o) = delete;
+ unique_ptr& operator = (unique_ptr &&o) { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
+ ~unique_ptr () { v::destroy (p); p = nullptr; }
+
+ T* get() const { return p; }
+ T* release () { T* v = p; p = nullptr; return v; }
+
+ void swap (unique_ptr &o) { std::swap (p, o.p); }
+ friend void swap (unique_ptr &a, unique_ptr &b) { std::swap (a.p, b.p); }
+
+ operator T * () const { return p; }
+ T& operator * () const { return *get (); }
+ T* operator -> () const { return get (); }
+ operator bool () { return p; }
+
+ private:
+ T *p;
+};
+
+template<typename T> struct is_unique_ptr : std::false_type {};
+template<typename T> struct is_unique_ptr<unique_ptr<T>> : std::true_type {};
+
template <typename T,
T * (*_get_empty) (void),
T * (*_reference) (T *),
@@ -144,6 +176,16 @@
}
};
+template<typename T>
+struct std::hash<hb::unique_ptr<T>>
+{
+ std::size_t operator()(const hb::unique_ptr<T>& v) const noexcept
+ {
+ std::size_t h = std::hash<decltype (v.get ())>{}(v.get ());
+ return h;
+ }
+};
+
#endif /* __cplusplus */
