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std::ranges::elements_view::iterator::operator*(3) | C++ Standard Libary | std::ranges::elements_view::iterator::operator*(3) |
NAME¶
std::ranges::elements_view::iterator::operator* - std::ranges::elements_view::iterator::operator*
Synopsis¶
constexpr decltype(auto) operator*() const; (since C++20)
Returns the element into V the underlying iterator points to.
Effectively returns /*get-element*/(this->base()), where for an expression
e,
/*get-element*/(e) is
* std::get<N>(*e), if ranges::range_reference_t<Base> is a
reference type.
Otherwise,
* static_cast<E>(std::get<N>(*e)), where E is
std::remove_cv_t<std::tuple_element_t<N,
ranges::range_reference_t<Base>>>.
Parameters¶
(none)
Return value¶
The current element.
Notes¶
operator-> is not provided.
Example¶
// Run this code
#include <iostream>
#include <ranges>
#include <string_view>
#include <tuple>
int main()
{
using T = std::tuple<int, char, std::string_view>;
const auto il = {
T{1, 'A', "α"},
T{2, 'B', "β"},
T{3, 'C', "γ"},
};
const auto view {il | std::views::elements<2>};
const auto iter {view.begin() + 1};
std::cout << *iter << '\n';
}
Output:¶
β
See also¶
operator[] accesses an element by index
(C++20) (public member function)
2024.06.10 | http://cppreference.com |