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[iter] Rename hb_iter_t() to hb_iter_type<> and add hb_item_type<>

This commit is contained in:
Behdad Esfahbod 2019-05-08 12:25:34 -07:00
parent bad1606639
commit 5875d775e1
1 changed files with 10 additions and 8 deletions
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18
src/hb-iter.hh
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@ -147,16 +147,18 @@ struct hb_iter_t
using Name::operator <<; \ using Name::operator <<; \
static_assert (true, "") static_assert (true, "")
/* Returns iterator type of a type. */ /* Returns iterator / item type of a type. */
#define hb_iter_t(Iterable) decltype (hb_deref (hb_declval (Iterable)).iter ()) template <typename Iterable>
using hb_iter_type = decltype (hb_deref (hb_declval (Iterable)).iter ());
template <typename Iterable>
using hb_item_type = decltype (*hb_deref (hb_declval (Iterable)).iter ());
template <typename> struct hb_array_t; template <typename> struct hb_array_t;
struct struct
{ {
template <typename T> template <typename T> hb_iter_type<T>
hb_iter_t (T)
operator () (T&& c) const operator () (T&& c) const
{ return hb_deref (hb_forward<T> (c)).iter (); } { return hb_deref (hb_forward<T> (c)).iter (); }
@ -487,9 +489,9 @@ struct
{ {
template <typename A, typename B, template <typename A, typename B,
hb_requires (hb_is_iterable (A) && hb_is_iterable (B))> hb_requires (hb_is_iterable (A) && hb_is_iterable (B))>
hb_zip_iter_t<hb_iter_t (A), hb_iter_t (B)> hb_zip_iter_t<hb_iter_type<A>, hb_iter_type<B>>
operator () (A& a, B &b) const operator () (A& a, B &b) const
{ return hb_zip_iter_t<hb_iter_t (A), hb_iter_t (B)> (hb_iter (a), hb_iter (b)); } { return hb_zip_iter_t<hb_iter_type<A>, hb_iter_type<B>> (hb_iter (a), hb_iter (b)); }
} }
HB_FUNCOBJ (hb_zip); HB_FUNCOBJ (hb_zip);
@ -534,9 +536,9 @@ struct
{ {
template <typename Iterable, template <typename Iterable,
hb_requires (hb_is_iterable (Iterable))> hb_requires (hb_is_iterable (Iterable))>
hb_enumerate_iter_t<hb_iter_t (Iterable)> hb_enumerate_iter_t<hb_iter_type<Iterable>>
operator () (Iterable&& it) const operator () (Iterable&& it) const
{ return hb_enumerate_iter_t<hb_iter_t (Iterable)> (hb_iter (it)); } { return hb_enumerate_iter_t<hb_iter_type<Iterable>> (hb_iter (it)); }
} }
HB_FUNCOBJ (hb_enumerate); HB_FUNCOBJ (hb_enumerate);