# std::ranges::drop_view<V>::drop_view

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< cpp‎ | ranges‎ | drop view

drop_view() requires std::default_initializable<V> = default; | (1) | (since C++20)
constexpr explicit drop_view( V base, ranges::range_difference_t<V> count ); | (2) | (since C++20)

Constructs a `drop_view`.

1) Default constructor. Value-initializes the underlying view and initializes the count to ​0​. After construction, `base()` returns a copy of V() and `size()` equals to the size of the underlying view.
2) Initializes the underlying view with std::move(base) and the count with count. After construction, `base()` returns a copy of base and `size()` returns ranges::size(base) - count if the size of base is not less than count, or ​0​ otherwise.

### Parameters

base | - | the underlying view
count | - | number of elements to skip

### Example

Run this code

    #include <algorithm>
    #include <array>
    #include <iostream>
    #include <iterator>
    #include <ranges>

    int main()
    {
        constexpr std::array hi{'H', 'e', 'l', 'l', 'o', ',',
                                ' ', 'C', '+', '+', '2', '0'};

        std::ranges::for_each(hi, [](const char c){ std::cout << c; });
        std::cout << '\n';

        constexpr auto n = std::distance(hi.cbegin(), std::ranges::find(hi, 'C'));

        auto cxx = std::ranges::drop_view{hi, n};

        std::ranges::for_each(cxx, [](const char c){ std::cout << c; });
        std::cout << '\n';
    }

Output:

    Hello, C++20
    C++20

### Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR | Applied to | Behavior as published | Correct behavior
--- | --- | --- | ---
LWG 3714 (P2711R1) | C++20 | the multi-parameter constructor was not explicit | made explicit

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