std::ranges...::operator*(3)

🦋 std::ranges::zip_transform_view::iterator::operator* 🦋

okay bestie, this is the C++ Standard Libary manual page for std::ranges...::operator*(3) — manual name folded in near the top so we’re not copy-pasting that header line like a boring NPC. It’s giving “iterator dereference but make it zip_transform_view,” and we’re keeping every technical crumb. 🎀

✨ NAME ✨

std::ranges::zip_transform_view::iterator::operator* -
std::ranges::zip_transform_view::iterator::operator*

📜 Synopsis 📜

Signature tea, served exactly:

          constexpr decltype(auto) operator*() const  (since C++23)
              noexcept(/* see description */);

It returns the transformed element you get by applying the invocable object of type F to the underlying pointed-to elements.

Equivalent to:

        return
            std::apply
            (
                [&](auto const&... iters) -> decltype(auto)
                {
                    return std::invoke(*parent_->fun_, *iters...);
                },
                inner_.current_
            );

where *parent_->fun_ is the transformation function stored in the parent ranges::zip_transform_view, and current_ is the underlying tuple of iterators into Views....

🌸 Parameters 🌸

• none. literally none. she takes no parameters. 💅

🎀 Return value 🎀

The element which is the result of transformation (mapping). Slay. ✨

🔥 Exceptions 🔥

noexcept specification:

          noexcept(std::invoke(*parent_->fun_,
       *std::get<INTS>(inner_.current_)...))

where INTS is the pack of integers 0, 1, ..., (sizeof...(Views)-1).

🦋 Notes 🦋

• operator-> is not provided. nope, not invited to the function party. 🙈
• The behavior is undefined if the parent_ pointer to parent ranges::zip_transform_view is null (e.g. if *this is default constructed). This is a danger zone, bestie — don’t do it. 💀

🙈 Example 🙈

This section is incomplete.

Reason: no example.

The manual said “no example” and honestly we respect the honesty. 😭

🏷️ Categories 🏷️

• conditionally noexcept
• Todo no example

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🫶 that’s the page, bestie. Source/version: http://cppreference.com; date: 2024.06.10; page: std::ranges...::operator*(3). Periodt. 💅