std::ranges::drop_while_view<V,Pred>::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
base_.2) Move constructs the result from the underlying view
base_.[edit] Parameters
(none)
[edit] Return value
A copy of the underlying view.
[edit] Example
Run this code
#include <algorithm> #include <array> #include <iostream> #include <ranges> void print(auto first, auto last) { for (; first != last; ++first) std::cout << *first << ' '; std::cout << '\n'; } int main() { std::array data{1, 2, 3, 4, 5}; print(data.cbegin(), data.cend()); auto func = [](int x) { return x < 3; }; auto view = std::ranges::drop_while_view {data, func}; print(view.begin(), view.end()); auto base = view.base(); // `base` refers to the `data` std::ranges::reverse (base); //< changes `data` indirectly print(data.cbegin(), data.cend()); }
Output:
1 2 3 4 5 3 4 5 5 4 3 2 1