12 template<
bool B,
typename T =
void>
13 using enable_if_t =
typename std::enable_if<B, T>::type;
16 using uncvref_t =
typename std::remove_cv<typename std::remove_reference<T>::type>::type;
20 template<std::size_t... Ints>
23 using type = index_sequence;
24 using value_type = std::size_t;
25 static constexpr std::size_t size() noexcept
27 return sizeof...(Ints);
31 template<
class Sequence1,
class Sequence2>
32 struct merge_and_renumber;
34 template<std::size_t... I1, std::size_t... I2>
35 struct merge_and_renumber<index_sequence<I1...>, index_sequence<I2...>>
36 : index_sequence < I1..., (sizeof...(I1) + I2)... > {};
38 template<std::
size_t N>
39 struct make_index_sequence
40 : merge_and_renumber < typename make_index_sequence < N / 2 >::type,
41 typename make_index_sequence < N - N / 2 >::type > {};
43 template<>
struct make_index_sequence<0> : index_sequence<> {};
44 template<>
struct make_index_sequence<1> : index_sequence<0> {};
46 template<
typename... Ts>
47 using index_sequence_for = make_index_sequence<
sizeof...(Ts)>;
50 template<
unsigned N>
struct priority_tag : priority_tag < N - 1 > {};
51 template<>
struct priority_tag<0> {};
57 static constexpr T value{};
61 constexpr T static_const<T>::value;