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_));
(none).
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)));
}|
(C++20) | returns an integer equal to the size of a range (customization point object) |
|
(C++20) | returns a signed integer equal to the size of a range (customization point object) |
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