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

Returns the number of elements. Equivalent to return ranges::size(_[base](../common%5Fview.html#base "cpp/ranges/common view")_);.

[edit] Return value

The number of elements.

[edit] Example

#include #include   int main() { constexpr static auto v1 = {1, 2, 3, 4, 5}; constexpr auto common1{v1 | std::views::common}; static_assert(common1.size() == 5);   constexpr auto take3{v1 | std::views::reverse | std::views::take(3)}; constexpr auto common2{take3 | std::views::common}; static_assert(common2.size() == 3);   using namespace std::literals; constexpr static auto v2 = {"∧"sv, "∨"sv, "∃"sv, "∀"sv}; static_assert(std::ranges::views::common(v2).size() == 4); }

[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] |