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std::ranges...m_view::size(3) C++ Standard Libarystd::ranges...m_view::size(3) NAME std::ranges::transform_view::size - std::ranges::transform_view::size Synopsis constexpr auto size() requires ranges::sized_range<V>; (since C++20) constexpr auto size() const requires ranges::sized_range<const V>; (since C++20) Returns the number of elements. Returns ranges::size(base_), where base_ is the underlying view. Parameters (none) Return value The number of elements. Notes If V does not model forward_range, size() might not be well-defined after a call to begin(). Example // Run this code #include <iostream> #include <ranges> #include <string> #include <cctype> int main() { std::string s{"The length of this string is 42 characters"}; auto tv = std::ranges::transform_view{s, [](char c) -> char { return std::toupper(c); } }; for (auto x: tv) { std::cout << x; }; std::cout << "\nsize = " << tv.size() << '\n'; } Output: THE LENGTH OF THIS STRING IS 42 CHARACTERS size = 42 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 2022.07.31 std::ranges...m_view::size(3)
NAME | Synopsis | Parameters | Return value | Notes | Example | Output: | See also
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