diff options
Diffstat (limited to 'thirdparty/harfbuzz/src/hb-meta.hh')
| -rw-r--r-- | thirdparty/harfbuzz/src/hb-meta.hh | 234 |
1 files changed, 11 insertions, 223 deletions
diff --git a/thirdparty/harfbuzz/src/hb-meta.hh b/thirdparty/harfbuzz/src/hb-meta.hh index a714bc2bf0..3fea5d995e 100644 --- a/thirdparty/harfbuzz/src/hb-meta.hh +++ b/thirdparty/harfbuzz/src/hb-meta.hh @@ -29,6 +29,10 @@ #include "hb.hh" +#include <memory> +#include <type_traits> +#include <utility> + /* * C++ template meta-programming & fundamentals used with them. @@ -82,30 +86,13 @@ template <> struct hb_priority<0> {}; template <typename T> struct hb_type_identity_t { typedef T type; }; template <typename T> using hb_type_identity = typename hb_type_identity_t<T>::type; -struct -{ - template <typename T> constexpr T* - operator () (T& arg) const - { -#pragma GCC diagnostic push -#pragma GCC diagnostic ignored "-Wcast-align" - /* https://en.cppreference.com/w/cpp/memory/addressof */ - return reinterpret_cast<T*> ( - &const_cast<char&> ( - reinterpret_cast<const volatile char&> (arg))); -#pragma GCC diagnostic pop - } -} -HB_FUNCOBJ (hb_addressof); - template <typename T> static inline T hb_declval (); #define hb_declval(T) (hb_declval<T> ()) template <typename T> struct hb_match_const : hb_type_identity_t<T>, hb_false_type {}; template <typename T> struct hb_match_const<const T> : hb_type_identity_t<T>, hb_true_type {}; template <typename T> using hb_remove_const = typename hb_match_const<T>::type; -template <typename T> using hb_add_const = const T; -#define hb_is_const(T) hb_match_const<T>::value + template <typename T> struct hb_match_reference : hb_type_identity_t<T>, hb_false_type {}; template <typename T> struct hb_match_reference<T &> : hb_type_identity_t<T>, hb_true_type {}; template <typename T> struct hb_match_reference<T &&> : hb_type_identity_t<T>, hb_true_type {}; @@ -116,92 +103,39 @@ template <typename T> using hb_add_lvalue_reference = decltype (_hb_try_add_lval template <typename T> auto _hb_try_add_rvalue_reference (hb_priority<1>) -> hb_type_identity<T&&>; template <typename T> auto _hb_try_add_rvalue_reference (hb_priority<0>) -> hb_type_identity<T>; template <typename T> using hb_add_rvalue_reference = decltype (_hb_try_add_rvalue_reference<T> (hb_prioritize)); -#define hb_is_reference(T) hb_match_reference<T>::value + template <typename T> struct hb_match_pointer : hb_type_identity_t<T>, hb_false_type {}; template <typename T> struct hb_match_pointer<T *> : hb_type_identity_t<T>, hb_true_type {}; template <typename T> using hb_remove_pointer = typename hb_match_pointer<T>::type; template <typename T> auto _hb_try_add_pointer (hb_priority<1>) -> hb_type_identity<hb_remove_reference<T>*>; template <typename T> auto _hb_try_add_pointer (hb_priority<1>) -> hb_type_identity<T>; template <typename T> using hb_add_pointer = decltype (_hb_try_add_pointer<T> (hb_prioritize)); -#define hb_is_pointer(T) hb_match_pointer<T>::value /* TODO Add feature-parity to std::decay. */ template <typename T> using hb_decay = hb_remove_const<hb_remove_reference<T>>; - -template<bool B, class T, class F> -struct _hb_conditional { typedef T type; }; -template<class T, class F> -struct _hb_conditional<false, T, F> { typedef F type; }; -template<bool B, class T, class F> -using hb_conditional = typename _hb_conditional<B, T, F>::type; - - -template <typename From, typename To> -struct hb_is_convertible -{ - private: - static constexpr bool from_void = hb_is_same (void, hb_decay<From>); - static constexpr bool to_void = hb_is_same (void, hb_decay<To> ); - static constexpr bool either_void = from_void || to_void; - static constexpr bool both_void = from_void && to_void; - - static hb_true_type impl2 (hb_conditional<to_void, int, To>); - - template <typename T> - static auto impl (hb_priority<1>) -> decltype (impl2 (hb_declval (T))); - template <typename T> - static hb_false_type impl (hb_priority<0>); - public: - static constexpr bool value = both_void || - (!either_void && - decltype (impl<hb_conditional<from_void, int, From>> (hb_prioritize))::value); -}; -#define hb_is_convertible(From,To) hb_is_convertible<From, To>::value - -template <typename Base, typename Derived> -using hb_is_base_of = hb_is_convertible<hb_decay<Derived> *, hb_decay<Base> *>; -#define hb_is_base_of(Base,Derived) hb_is_base_of<Base, Derived>::value +#define hb_is_convertible(From,To) std::is_convertible<From, To>::value template <typename From, typename To> using hb_is_cr_convertible = hb_bool_constant< hb_is_same (hb_decay<From>, hb_decay<To>) && - (!hb_is_const (From) || hb_is_const (To)) && - (!hb_is_reference (To) || hb_is_const (To) || hb_is_reference (To)) + (!std::is_const<From>::value || std::is_const<To>::value) && + (!std::is_reference<To>::value || std::is_const<To>::value || std::is_reference<To>::value) >; #define hb_is_cr_convertible(From,To) hb_is_cr_convertible<From, To>::value -/* std::move and std::forward */ - -template <typename T> -static constexpr hb_remove_reference<T>&& hb_move (T&& t) { return (hb_remove_reference<T>&&) (t); } - -template <typename T> -static constexpr T&& hb_forward (hb_remove_reference<T>& t) { return (T&&) t; } -template <typename T> -static constexpr T&& hb_forward (hb_remove_reference<T>&& t) { return (T&&) t; } struct { template <typename T> constexpr auto - operator () (T&& v) const HB_AUTO_RETURN (hb_forward<T> (v)) + operator () (T&& v) const HB_AUTO_RETURN (std::forward<T> (v)) template <typename T> constexpr auto operator () (T *v) const HB_AUTO_RETURN (*v) } HB_FUNCOBJ (hb_deref); -struct -{ - template <typename T> constexpr auto - operator () (T&& v) const HB_AUTO_RETURN (hb_forward<T> (v)) - - template <typename T> constexpr auto - operator () (T& v) const HB_AUTO_RETURN (hb_addressof (v)) -} -HB_FUNCOBJ (hb_ref); - template <typename T> struct hb_reference_wrapper { @@ -215,7 +149,7 @@ struct hb_reference_wrapper template <typename T> struct hb_reference_wrapper<T&> { - hb_reference_wrapper (T& v) : v (hb_addressof (v)) {} + 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; } @@ -226,50 +160,6 @@ struct hb_reference_wrapper<T&> /* Type traits */ -template <typename T> -using hb_is_integral = hb_bool_constant< - hb_is_same (hb_decay<T>, char) || - hb_is_same (hb_decay<T>, signed char) || - hb_is_same (hb_decay<T>, unsigned char) || - hb_is_same (hb_decay<T>, signed int) || - hb_is_same (hb_decay<T>, unsigned int) || - hb_is_same (hb_decay<T>, signed short) || - hb_is_same (hb_decay<T>, unsigned short) || - hb_is_same (hb_decay<T>, signed long) || - hb_is_same (hb_decay<T>, unsigned long) || - hb_is_same (hb_decay<T>, signed long long) || - hb_is_same (hb_decay<T>, unsigned long long) || - false ->; -#define hb_is_integral(T) hb_is_integral<T>::value -template <typename T> -using hb_is_floating_point = hb_bool_constant< - hb_is_same (hb_decay<T>, float) || - hb_is_same (hb_decay<T>, double) || - hb_is_same (hb_decay<T>, long double) || - false ->; -#define hb_is_floating_point(T) hb_is_floating_point<T>::value -template <typename T> -using hb_is_arithmetic = hb_bool_constant< - hb_is_integral (T) || - hb_is_floating_point (T) || - false ->; -#define hb_is_arithmetic(T) hb_is_arithmetic<T>::value - - -template <typename T, bool is_arithmetic> struct hb_is_signed_; -template <typename T> struct hb_is_signed_<T, false> : hb_false_type {}; -template <typename T> struct hb_is_signed_<T, true> : hb_bool_constant<(T) -1 < (T) 0> {}; -template <typename T> struct hb_is_signed : hb_is_signed_<T, hb_is_arithmetic (T)> {}; -#define hb_is_signed(T) hb_is_signed<T>::value -template <typename T, bool is_arithmetic> struct hb_is_unsigned_; -template <typename T> struct hb_is_unsigned_<T, false> : hb_false_type {}; -template <typename T> struct hb_is_unsigned_<T, true> : hb_bool_constant<(T) 0 < (T) -1> {}; -template <typename T> struct hb_is_unsigned : hb_is_unsigned_<T, hb_is_arithmetic (T)> {}; -#define hb_is_unsigned(T) hb_is_unsigned<T>::value - template <typename T> struct hb_int_min; template <> struct hb_int_min<char> : hb_integral_constant<char, CHAR_MIN> {}; template <> struct hb_int_min<signed char> : hb_integral_constant<signed char, SCHAR_MIN> {}; @@ -309,108 +199,6 @@ template <> struct hb_int_max<unsigned long long> : hb_integral_constant<unsigne TypeName(const TypeName&) = delete; \ void operator=(const TypeName&) = delete -template <typename T, typename> -struct _hb_is_destructible : hb_false_type {}; -template <typename T> -struct _hb_is_destructible<T, hb_void_t<decltype (hb_declval (T).~T ())>> : hb_true_type {}; -template <typename T> -using hb_is_destructible = _hb_is_destructible<T, void>; -#define hb_is_destructible(T) hb_is_destructible<T>::value - -template <typename T, typename, typename ...Ts> -struct _hb_is_constructible : hb_false_type {}; -template <typename T, typename ...Ts> -struct _hb_is_constructible<T, hb_void_t<decltype (T (hb_declval (Ts)...))>, Ts...> : hb_true_type {}; -template <typename T, typename ...Ts> -using hb_is_constructible = _hb_is_constructible<T, void, Ts...>; -#define hb_is_constructible(...) hb_is_constructible<__VA_ARGS__>::value - -template <typename T> -using hb_is_default_constructible = hb_is_constructible<T>; -#define hb_is_default_constructible(T) hb_is_default_constructible<T>::value - -template <typename T> -using hb_is_copy_constructible = hb_is_constructible<T, hb_add_lvalue_reference<hb_add_const<T>>>; -#define hb_is_copy_constructible(T) hb_is_copy_constructible<T>::value - -template <typename T> -using hb_is_move_constructible = hb_is_constructible<T, hb_add_rvalue_reference<hb_add_const<T>>>; -#define hb_is_move_constructible(T) hb_is_move_constructible<T>::value - -template <typename T, typename U, typename> -struct _hb_is_assignable : hb_false_type {}; -template <typename T, typename U> -struct _hb_is_assignable<T, U, hb_void_t<decltype (hb_declval (T) = hb_declval (U))>> : hb_true_type {}; -template <typename T, typename U> -using hb_is_assignable = _hb_is_assignable<T, U, void>; -#define hb_is_assignable(T,U) hb_is_assignable<T, U>::value - -template <typename T> -using hb_is_copy_assignable = hb_is_assignable<hb_add_lvalue_reference<T>, - hb_add_lvalue_reference<hb_add_const<T>>>; -#define hb_is_copy_assignable(T) hb_is_copy_assignable<T>::value - -template <typename T> -using hb_is_move_assignable = hb_is_assignable<hb_add_lvalue_reference<T>, - hb_add_rvalue_reference<T>>; -#define hb_is_move_assignable(T) hb_is_move_assignable<T>::value - -/* Trivial versions. */ - -template <typename T> union hb_trivial { T value; }; - -template <typename T> -using hb_is_trivially_destructible= hb_is_destructible<hb_trivial<T>>; -#define hb_is_trivially_destructible(T) hb_is_trivially_destructible<T>::value - -/* Don't know how to do the following. */ -//template <typename T, typename ...Ts> -//using hb_is_trivially_constructible= hb_is_constructible<hb_trivial<T>, hb_trivial<Ts>...>; -//#define hb_is_trivially_constructible(...) hb_is_trivially_constructible<__VA_ARGS__>::value - -template <typename T> -using hb_is_trivially_default_constructible= hb_is_default_constructible<hb_trivial<T>>; -#define hb_is_trivially_default_constructible(T) hb_is_trivially_default_constructible<T>::value - -template <typename T> -using hb_is_trivially_copy_constructible= hb_is_copy_constructible<hb_trivial<T>>; -#define hb_is_trivially_copy_constructible(T) hb_is_trivially_copy_constructible<T>::value - -template <typename T> -using hb_is_trivially_move_constructible= hb_is_move_constructible<hb_trivial<T>>; -#define hb_is_trivially_move_constructible(T) hb_is_trivially_move_constructible<T>::value - -/* Don't know how to do the following. */ -//template <typename T, typename U> -//using hb_is_trivially_assignable= hb_is_assignable<hb_trivial<T>, hb_trivial<U>>; -//#define hb_is_trivially_assignable(T,U) hb_is_trivially_assignable<T, U>::value - -template <typename T> -using hb_is_trivially_copy_assignable= hb_is_copy_assignable<hb_trivial<T>>; -#define hb_is_trivially_copy_assignable(T) hb_is_trivially_copy_assignable<T>::value - -template <typename T> -using hb_is_trivially_move_assignable= hb_is_move_assignable<hb_trivial<T>>; -#define hb_is_trivially_move_assignable(T) hb_is_trivially_move_assignable<T>::value - -template <typename T> -using hb_is_trivially_copyable= hb_bool_constant< - hb_is_trivially_destructible (T) && - (!hb_is_move_assignable (T) || hb_is_trivially_move_assignable (T)) && - (!hb_is_move_constructible (T) || hb_is_trivially_move_constructible (T)) && - (!hb_is_copy_assignable (T) || hb_is_trivially_copy_assignable (T)) && - (!hb_is_copy_constructible (T) || hb_is_trivially_copy_constructible (T)) && - true ->; -#define hb_is_trivially_copyable(T) hb_is_trivially_copyable<T>::value - -template <typename T> -using hb_is_trivial= hb_bool_constant< - hb_is_trivially_copyable (T) && - hb_is_trivially_default_constructible (T) ->; -#define hb_is_trivial(T) hb_is_trivial<T>::value - /* hb_unwrap_type (T) * If T has no T::type, returns T. Otherwise calls itself on T::type recursively. */ |