std::ranges...w::sentinel(3)

💖 NAME 💖

std::ranges::join_view::sentinel — std::ranges::join_view::sentinel. That’s the whole name, bestie, no notes 💅.

This is the std::ranges...w::sentinel(3) page from the C++ Standard Libary manual, and it’s giving very specific C++20 sentinel energy ✨.

✨ Synopsis ✨

template< bool Const >  (since C++20)
class /*sentinel*/      (exposition only*)

Okay so std::ranges::join_view::sentinel is the return type of join_view::end when either of the underlying ranges (V or ranges::range_reference_t<V>) is not a common_range, or when the parent join_view is not a forward_range. That’s the vibe check 🫶.

If V is not a simple view, Const is true for sentinels returned from the const overloads, and false otherwise. If V is a simple view, Const is true. No cap 💅.

🎀 Member types 🎀

Both of these member types are private and exposition-only, so peek respectfully bestie:

• Parent (private) — const ranges::join_view<V> if Const is true, otherwise ranges::join_view<V>. (exposition-only member type*)
• Base (private) — const V if Const is true, otherwise V. (exposition-only member type*)

🦋 Data members 🦋

Only one data member object here, and she’s private + exposition-only:

• end_ (private) — a sentinel of type std::sentinel_t<Base> obtained from (possibly const-qualified) V. (exposition-only member object*)

🌸 Member functions 🌸

• constructor — constructs a sentinel (public member function).

💜 Non-member functions 💜

• operator== (C++20) — compares a sentinel with an iterator returned from join_view::begin (function).

That’s the entire page, bestie 🫶. Source/version: cppreference.com; date: 2024.06.10. The sentinel said slay and logged off 👑✨.