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