Imported Upstream version 8.2.2

[platform/upstream/harfbuzz.git] / src / hb-meta.hh

diff --git a/src/hb-meta.hh b/src/hb-meta.hh
index 3fea5d9..52ff4a8 100644 (file)
--- a/src/hb-meta.hh
+++ b/src/hb-meta.hh
@@ -112,8 +112,7 @@ template <typename T> auto _hb_try_add_pointer (hb_priority<1>) -> hb_type_ident
 template <typename T> using hb_add_pointer = decltype (_hb_try_add_pointer<T> (hb_prioritize));
 
 
-/* TODO Add feature-parity to std::decay. */
-template <typename T> using hb_decay = hb_remove_const<hb_remove_reference<T>>;
+template <typename T> using hb_decay = typename std::decay<T>::type;
 
 #define hb_is_convertible(From,To) std::is_convertible<From, To>::value
 
@@ -133,6 +132,18 @@ struct
 
   template <typename T> constexpr auto
   operator () (T *v) const HB_AUTO_RETURN (*v)
+
+  template <typename T> constexpr auto
+  operator () (const hb::shared_ptr<T>& v) const HB_AUTO_RETURN (*v)
+
+  template <typename T> constexpr auto
+  operator () (hb::shared_ptr<T>& v) const HB_AUTO_RETURN (*v)
+  
+  template <typename T> constexpr auto
+  operator () (const hb::unique_ptr<T>& v) const HB_AUTO_RETURN (*v)
+
+  template <typename T> constexpr auto
+  operator () (hb::unique_ptr<T>& v) const HB_AUTO_RETURN (*v)
 }
 HB_FUNCOBJ (hb_deref);
 
@@ -142,8 +153,8 @@ struct hb_reference_wrapper
   hb_reference_wrapper (T v) : v (v) {}
   bool operator == (const hb_reference_wrapper& o) const { return v == o.v; }
   bool operator != (const hb_reference_wrapper& o) const { return v != o.v; }
-  operator T () const { return v; }
-  T get () const { return v; }
+  operator T& () { return v; }
+  T& get () { return v; }
   T v;
 };
 template <typename T>
@@ -152,8 +163,8 @@ struct hb_reference_wrapper<T&>
   hb_reference_wrapper (T& v) : v (std::addressof (v)) {}
   bool operator == (const hb_reference_wrapper& o) const { return v == o.v; }
   bool operator != (const hb_reference_wrapper& o) const { return v != o.v; }
-  operator T& () const { return *v; }
-  T& get () const { return *v; }
+  operator T& () { return *v; }
+  T& get () { return *v; }
   T* v;
 };
 
@@ -188,6 +199,19 @@ template <> struct hb_int_max<signed long long>            : hb_integral_constant<signed l
 template <> struct hb_int_max<unsigned long long>      : hb_integral_constant<unsigned long long,      ULLONG_MAX>     {};
 #define hb_int_max(T) hb_int_max<T>::value
 
+#if defined(__GNUC__) && __GNUC__ < 5 && !defined(__clang__)
+#define hb_is_trivially_copyable(T) __has_trivial_copy(T)
+#define hb_is_trivially_copy_assignable(T) __has_trivial_assign(T)
+#define hb_is_trivially_constructible(T) __has_trivial_constructor(T)
+#define hb_is_trivially_copy_constructible(T) __has_trivial_copy_constructor(T)
+#define hb_is_trivially_destructible(T) __has_trivial_destructor(T)
+#else
+#define hb_is_trivially_copyable(T) std::is_trivially_copyable<T>::value
+#define hb_is_trivially_copy_assignable(T) std::is_trivially_copy_assignable<T>::value
+#define hb_is_trivially_constructible(T) std::is_trivially_constructible<T>::value
+#define hb_is_trivially_copy_constructible(T) std::is_trivially_copy_constructible<T>::value
+#define hb_is_trivially_destructible(T) std::is_trivially_destructible<T>::value
+#endif
 
 /* Class traits. */