[cplusplus] Add unique_ptr
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@ -247,6 +247,11 @@ struct
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{
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return v.get () ? v.get ()->hash () : 0;
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}
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template <typename T> constexpr uint32_t
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impl (const hb::unique_ptr<T>& v, hb_priority<1>) const
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{
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return v.get () ? v.get ()->hash () : 0;
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}
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template <typename T> constexpr auto
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impl (const T& v, hb_priority<0>) const HB_RETURN (uint32_t, std::hash<hb_decay<decltype (hb_deref (v))>>{} (hb_deref (v)))
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@ -58,7 +58,7 @@ struct shared_ptr
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shared_ptr (const shared_ptr &o) : p (v::reference (o.p)) {}
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shared_ptr (shared_ptr &&o) : p (o.p) { o.p = nullptr; }
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shared_ptr& operator = (const shared_ptr &o) { if (p != o.p) { destroy (); p = o.p; reference (); } return *this; }
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shared_ptr& operator = (shared_ptr &&o) { destroy (); p = o.p; o.p = nullptr; return *this; }
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shared_ptr& operator = (shared_ptr &&o) { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
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~shared_ptr () { v::destroy (p); p = nullptr; }
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T* get() const { return p; }
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@ -89,6 +89,38 @@ struct shared_ptr
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template<typename T> struct is_shared_ptr : std::false_type {};
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template<typename T> struct is_shared_ptr<shared_ptr<T>> : std::true_type {};
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template <typename T>
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struct unique_ptr
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{
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using element_type = T;
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using v = vtable<T>;
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explicit unique_ptr (T *p = nullptr) : p (p) {}
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unique_ptr (const unique_ptr &o) = delete;
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unique_ptr (unique_ptr &&o) : p (o.p) { o.p = nullptr; }
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unique_ptr& operator = (const unique_ptr &o) = delete;
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unique_ptr& operator = (unique_ptr &&o) { v::destroy (p); p = o.p; o.p = nullptr; return *this; }
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~unique_ptr () { v::destroy (p); p = nullptr; }
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T* get() const { return p; }
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T* release () { T* v = p; p = nullptr; return v; }
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void swap (unique_ptr &o) { std::swap (p, o.p); }
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friend void swap (unique_ptr &a, unique_ptr &b) { std::swap (a.p, b.p); }
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operator T * () const { return p; }
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T& operator * () const { return *get (); }
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T* operator -> () const { return get (); }
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operator bool () { return p; }
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private:
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T *p;
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};
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template<typename T> struct is_unique_ptr : std::false_type {};
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template<typename T> struct is_unique_ptr<unique_ptr<T>> : std::true_type {};
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template <typename T,
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T * (*_get_empty) (void),
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T * (*_reference) (T *),
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@ -144,6 +176,16 @@ struct std::hash<hb::shared_ptr<T>>
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}
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};
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template<typename T>
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struct std::hash<hb::unique_ptr<T>>
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{
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std::size_t operator()(const hb::unique_ptr<T>& v) const noexcept
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{
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std::size_t h = std::hash<decltype (v.get ())>{}(v.get ());
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return h;
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}
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};
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#endif /* __cplusplus */
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@ -106,5 +106,7 @@ main ()
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pb.set_user_data (&key, b, nullptr, true);
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(void) pb.get_user_data (&key);
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hb::unique_ptr<hb_buffer_t> pb5 {pb3.reference ()};
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return pb == pb.get_empty () || pb == pb2;
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}
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