14 #ifndef ROOT_RIntegerSequence
15 #define ROOT_RIntegerSequence
17 #include <RConfigure.h>
20 #ifdef R__HAS_STD_INDEX_SEQUENCE
29 #include <type_traits>
34 template <
class _IdxType, _IdxType... _Values>
36 template <
template <
class _OIdxType, _OIdxType...>
class _ToIndexSeq,
class _ToIndexType>
37 using __convert = _ToIndexSeq<_ToIndexType, _Values...>;
40 template<
typename _Tp,
size_t ..._Extra>
43 template<
typename _Tp, _Tp ..._Np,
size_t ..._Extra>
47 sizeof...(_Np) + _Np...,
48 2 *
sizeof...(_Np) + _Np...,
49 3 *
sizeof...(_Np) + _Np...,
50 4 *
sizeof...(_Np) + _Np...,
51 5 *
sizeof...(_Np) + _Np...,
52 6 *
sizeof...(_Np) + _Np...,
53 7 *
sizeof...(_Np) + _Np...,
58 template<
size_t _Np>
struct __make :
__parity<_Np % 8>::template __pmake<_Np> {};
72 struct __pmake :
__repeat<typename __make<_Np / 8>::type> {
75 template<>
struct __parity<1> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 1> {}; };
76 template<>
struct __parity<2> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 2, _Np - 1> {}; };
77 template<>
struct __parity<3> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 3, _Np - 2, _Np - 1> {}; };
78 template<>
struct __parity<4> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
79 template<>
struct __parity<5> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
80 template<>
struct __parity<6> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
81 template<>
struct __parity<7> {
template<
size_t _Np>
struct __pmake :
__repeat<typename __make<_Np / 8>::type, _Np - 7, _Np - 6, _Np - 5, _Np - 4, _Np - 3, _Np - 2, _Np - 1> {}; };
88 template <
class _Tp, _Tp... _Ip>
89 struct integer_sequence {
90 typedef _Tp value_type;
91 static_assert(is_integral<_Tp>::value,
"std::integer_sequence can only be instantiated with an integral type");
92 static constexpr
size_t size() noexcept {
return sizeof...(_Ip); }
95 template <
size_t... _Ip>
96 using index_sequence = integer_sequence<size_t, _Ip...>;
98 template <
typename _Tp, _Tp _Np>
99 using __make_integer_sequence_unchecked =
102 template <
class _Tp, _Tp _Ep>
103 struct __make_integer_sequence_checked {
104 static_assert(is_integral<_Tp>::value,
"std::make_integer_sequence can only be instantiated with an integral type");
105 static_assert(0 <= _Ep,
"std::make_integer_sequence must have a non-negative sequence length");
108 typedef __make_integer_sequence_unchecked<_Tp, 0 <= _Ep ? _Ep : 0>
type;
111 template <
class _Tp, _Tp _Ep>
114 template <
class _Tp, _Tp _Np>
115 using make_integer_sequence = __make_integer_sequence<_Tp, _Np>;
117 template <
size_t _Np>
118 using make_index_sequence = make_integer_sequence<size_t, _Np>;
120 template <
class... _Tp>
121 using index_sequence_for = make_index_sequence<
sizeof...(_Tp)>;