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std::ranges..._view::size(3) C++ Standard Libary std::ranges..._view::size(3) NAME std::ranges::common_view::size - std::ranges::common_view::size Synopsis constexpr auto size() requires ranges::sized_range<V>; (1) (since C++20) constexpr auto size() const requires ranges::sized_range<const V>; (2) (since C++20) Returns the number of elements. Equivalent to return ranges::size(base_);, where base_ is the under- lying view. Parameters (none) Return value The number of elements. Example // Run this code #include <ranges> #include <string_view> 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); } See also ranges::size returns an integer equal to the size of a range (C++20) (customization point object) ranges::ssize returns a signed integer equal to the size of a range (C++20) (customization point object) http://cppreference.com 2024.06.10 std::ranges..._view::size(3)
NAME | Synopsis | Parameters | Return value | Example | See also
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