std::ranges::stride_view::size - cppreference.com (original) (raw)

Returns the number of elements.

Let base_ be the underlying view and stride_ be the stored stride value. Equivalent to:

[edit] Parameters

(none)

[edit] Return value

The number of elements. The returned value is calculated as if by expression

(ranges::size(base_) / stride_) + ((ranges::size(base_) % stride_ ? 1 : 0).

[edit] Example

#include #include   int main() { namespace vs = std::views; constexpr static auto v = {1, 2, 3, 4, 5}; static_assert ( vs::stride(v, 1).size() == 5 and vs::stride(v, 2).size() == 3 and vs::stride(v, 3).size() == 2 and vs::stride(v, 4).size() == 2 and vs::stride(v, 5).size() == 1 and vs::stride(v, 6).size() == 1 );   std::forward_list list{v}; // auto s = vs::stride(list, 2).size(); // Error: not a sized_range }

[edit] See also

| | returns an integer equal to the size of a range(customization point object)[edit] | | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | returns a signed integer equal to the size of a range(customization point object)[edit] |