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std::ranges..._view::base(3) C++ Standard Libary std::ranges..._view::base(3) NAME std::ranges::drop_while_view::base - std::ranges::drop_while_view::base Synopsis 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 // Run this code #include <array> #include <ranges> #include <iostream> #include <algorithm> 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 http://cppreference.com 2022.07.31 std::ranges..._view::base(3)
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