constexpr auto size() requires ranges::sized_range<V>;
(1) (since C++23)
constexpr auto size() const requires ranges::sized_range<const V>;
(2) (since C++23)

Returns the number of elements, which is the smallest integer value that is not less than the quotient of dividing the size of underlying view base_ by the underlying data member n_, that holds the number passed to the constructor (​0​ if default constructed). Equivalent to.

return __to_unsigned_like(__div_ceil(ranges::distance(base_), n_));



Return value

The number of elements.


// https://godbolt.org/z/Ye7M7arv7
#include <ranges>
int main()
    constexpr static auto v = {1, 2, 3, 4, 5};
    constexpr auto w{ std::ranges::chunk_view(v, 2) };
    static_assert(w.size() == (5 / 2 + (5 % 2 == 0 ? 0 : 1)));

See also

returns an integer equal to the size of a range
(customization point object)
returns a signed integer equal to the size of a range
(customization point object)

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