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[iter] Make hb_is_iterator_of() check is_convertible 

Instead of is_cr_convertible.
This commit is contained in:
Behdad Esfahbod 2019-05-09 14:53:02 -07:00
parent 70a49f2e4a
commit 726002a6a6
3 changed files with 9 additions and 9 deletions
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8
src/hb-array.hh
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@ -47,12 +47,12 @@ struct hb_array_t : hb_iter_with_fallback_t<hb_array_t<Type>, Type&>
template <unsigned int length_> hb_array_t (Type (&array_)[length_]) : arrayZ (array_), length (length_) {}
template <typename U,
hb_enable_if (hb_is_cr_convertible_to(U, Type))>
hb_enable_if (hb_is_cr_convertible(U, Type))>
hb_array_t (const hb_array_t<U> &o) :
hb_iter_with_fallback_t<hb_array_t<Type>, Type&> (),
arrayZ (o.arrayZ), length (o.length) {}
template <typename U,
hb_enable_if (hb_is_cr_convertible_to(U, Type))>
hb_enable_if (hb_is_cr_convertible(U, Type))>
hb_array_t& operator = (const hb_array_t<U> &o)
{ arrayZ = o.arrayZ; length = o.length; return *this; }
@ -228,12 +228,12 @@ struct hb_sorted_array_t :
template <unsigned int length_> hb_sorted_array_t (Type (&array_)[length_]) : hb_array_t<Type> (array_) {}
template <typename U,
hb_enable_if (hb_is_cr_convertible_to(U, Type))>
hb_enable_if (hb_is_cr_convertible(U, Type))>
hb_sorted_array_t (const hb_array_t<U> &o) :
hb_iter_t<hb_sorted_array_t<Type>, Type&> (),
hb_array_t<Type> (o) {}
template <typename U,
hb_enable_if (hb_is_cr_convertible_to(U, Type))>
hb_enable_if (hb_is_cr_convertible(U, Type))>
hb_sorted_array_t& operator = (const hb_array_t<U> &o)
{ hb_array_t<Type> (*this) = o; return *this; }

2
src/hb-iter.hh
View File

@ -266,7 +266,7 @@ static inline char _hb_is_iterator_of (hb_priority<0>, const void *) { return 0;
template <typename Iter,
typename Item,
typename Item2 = typename Iter::item_t,
hb_enable_if (hb_is_cr_convertible_to (Item2, Item))>
hb_enable_if (hb_is_convertible (Item2, Item))>
static inline int _hb_is_iterator_of (hb_priority<2>, hb_iter_t<Iter, Item2> *) { return 0; }
template<typename Iter, typename Item>

8
src/hb-meta.hh
View File

@ -116,10 +116,10 @@ template <typename T> using hb_remove_pointer = typename hb_match_pointer<T>::ty
/* TODO Add feature-parity to std::decay. */
template <typename T> using hb_decay = hb_remove_const<hb_remove_reference<T>>;
#define hb_is_cr_convertible_to(A, B) ( \
hb_is_same (hb_decay<A>, hb_decay<B>) && \
hb_is_const (A) <= hb_is_const (B) && \
hb_is_reference (A) >= hb_is_reference (B))
#define hb_is_cr_convertible(From, To) ( \
hb_is_same (hb_decay<From>, hb_decay<To>) && \
hb_is_const (From) <= hb_is_const (To) && \
hb_is_reference (From) >= hb_is_reference (To))