std::ranges::common_view<V>::base
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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.
[edit] Parameters
(none)
[edit] Return value
A copy of the underlying view.
[edit] Example
Run this code
#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(): []