std::ranges::common_view<V>::base
constexpr V base() const& requires std::copy_constructible<V>; |
(1) | (since C++20) |
constexpr V base() &&; |
(2) | (since C++20) |
Returns a copy of the underlying view.
1) Copy constructs the result from the underlying view.
2) Move constructs the result from the underlying view.
Parameters
(none).
Return value
A copy of the underlying view.
Example
#include <iostream>
#include <ranges>
#include <string>
int main()
{
std::string str { "C++20" };
auto view = std::views::common(str);
std::string copy_of_str = view.base();
std::cout << "copy of str: [" << copy_of_str << "]\n";
std::cout << "view.base(): [" << view.base() << "]\n";
std::string move_str = std::move(view.base());
std::cout << "moved str: [" << move_str << "]\n";
std::cout << "view.base(): [" << view.base() << "]\n"; // unspecified
}
Possible output:
copy of str: [C++20] view.base(): [C++20] moved str: [C++20] view.base(): []
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https://en.cppreference.com/w/cpp/ranges/common_view/base
