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[meta] Use std::is_const instead of hb_is_const

This commit is contained in:
Behdad Esfahbod 2022-01-13 15:32:46 -07:00
parent 909dde9df1
commit 3b2e604237
1 changed files with 2 additions and 3 deletions
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5
src/hb-meta.hh
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@ -108,7 +108,6 @@ template <typename T> struct hb_match_const : hb_type_identity_t<T>, hb_false_t
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 {};
@ -137,8 +136,8 @@ template <typename T> using hb_decay = hb_remove_const<hb_remove_reference<T>>;
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)) &&
(!std::is_reference<To>::value || hb_is_const (To) || std::is_reference<To>::value)
(!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