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[meta] Rewrite is_integral / is_floating_point, add is_arithmetic

This commit is contained in:
Behdad Esfahbod 2019-05-10 20:20:51 -07:00
parent c3a456a26e
commit e939d88bd7
1 changed files with 31 additions and 18 deletions
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49
src/hb-meta.hh
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@ -221,25 +221,38 @@ struct hb_reference_wrapper<T&>
};
template <typename T> struct hb_is_integral { static constexpr bool value = false;};
template <> struct hb_is_integral<char> { static constexpr bool value = true; };
template <> struct hb_is_integral<signed char> { static constexpr bool value = true; };
template <> struct hb_is_integral<unsigned char> { static constexpr bool value = true; };
template <> struct hb_is_integral<signed short> { static constexpr bool value = true; };
template <> struct hb_is_integral<unsigned short> { static constexpr bool value = true; };
template <> struct hb_is_integral<signed int> { static constexpr bool value = true; };
template <> struct hb_is_integral<unsigned int> { static constexpr bool value = true; };
template <> struct hb_is_integral<signed long> { static constexpr bool value = true; };
template <> struct hb_is_integral<unsigned long> { static constexpr bool value = true; };
template <> struct hb_is_integral<signed long long> { static constexpr bool value = true; };
template <> struct hb_is_integral<unsigned long long> { static constexpr bool value = true; };
template <typename T> struct hb_is_floating_point { static constexpr bool value = false;};
template <> struct hb_is_floating_point<float> { static constexpr bool value = true; };
template <> struct hb_is_floating_point<double> { static constexpr bool value = true; };
template <> struct hb_is_floating_point<long double> { static constexpr bool value = true; };
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_arighmetic(T) hb_is_arighmetic<T>::value
template <typename T> struct hb_is_signed;
template <> struct hb_is_signed<char> { static constexpr bool value = CHAR_MIN < 0; };
template <> struct hb_is_signed<signed char> { static constexpr bool value = true; };