std::match_results::empty(3)

okay so bestie, welcome to std::match_results::empty(3) from the C++ Standard Libary — yes, that’s the manual name in the header, spelling and all, and we are not touching it. This one is short and iconic: it’s basically the vibe check for whether a match actually matched. ✨

🌸 NAME 🌸

std::match_results::empty — std::match_results::empty (the name said it twice, and honestly? slay.)

✨ Synopsis ✨

          bool empty() const;                (since C++11)
                                             (until C++20)
          [[nodiscard]] bool empty() const;  (since C++20)

Checks whether the match was successful. That’s the whole assignment, no cap. 🎯

🎀 Parameters 🎀

(none) — literally zero parameters, not even a tiny one. 💅

💖 Return value 💖

It gives you true if *this represents the result of a failed match, and false otherwise, i.e. size() == 0. So yes: failed-match energy gets true, and everything else gets false. 😭

😭 Exceptions 😭

May throw implementation-defined exceptions. So like, it’s not contractually chill 100% of the time — the implementation gets to define its own chaos. 🙈

⚡ Complexity ⚡

Constant. That’s it. No dramatic runtime arc. 💀

👀 See also 👀

• size — returns the number of matches in a fully-established result state (public member function).

xoxo, your source is http://cppreference.com, dated 2024.06.10 — mwah 💋