(C++17) | ||||
| Sequence | ||||
(C++11) | ||||
(C++26) | ||||
(C++26) | ||||
(C++11) | ||||
| Associative | ||||
| Unordered associative | ||||
(C++11) | ||||
(C++11) | ||||
(C++11) | ||||
(C++11) | ||||
| Adaptors | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
(C++23) | ||||
| Views | ||||
(C++20) | ||||
(C++23) | ||||
| Tables | ||||
| Iterator invalidation | ||||
| Member function table | ||||
| Non-member function table |
| Member types | ||||||
| Member functions | ||||||
| Non-member functions | ||||||
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| Helper classes | ||||||
tuple_element<std::array> | ||||||
| Deduction guides(C++17) | ||||||
Defined in header <array> | ||
template<std::size_t I,class T,std::size_t N> struct tuple_element< I,std::array<T, N>>; | (since C++11) | |
Provides compile-time indexed access to the type of the elements of the array using tuple-like interface.
Contents |
| Member type | Definition |
| type | the type of elements of the array |
template<std::size_t I,class T>struct tuple_element; template<std::size_t I,class T,std::size_t N>struct tuple_element<I,std::array<T,N>>{using type= T;}; |
#include <array>#include <tuple>#include <type_traits> int main(){// define array and get the type of the element at position 0std::array<int,10> data{0,1,2,3,4,5,6,7,8,9};using T=std::tuple_element<0, decltype(data)>::type;// int static_assert(std::is_same_v<T,int>); constauto const_data= data;using CT=std::tuple_element<0, decltype(const_data)>::type;// const int // the result of tuple_element depends on the cv-qualification of the tuple-like type static_assert(!std::is_same_v<T, CT>); static_assert(std::is_same_v<CT,constint>);}
| Structured binding(C++17) | binds the specified names to sub-objects or tuple elements of the initializer[edit] |
| obtains the type of the specified element (class template specialization)[edit] | |
obtains the type of the elements ofpair(class template specialization)[edit] |
