std::unexpe...td::unexpect(3)

🎀 NAME 🎀

okay so this page is about std::unexpect_t and std::unexpect, from the C++ Standard Libary (yes, the original header spells it “Libary” — we are keeping the typo energy 💅). It’s the tag-type-and-constant situation for making an std::expected hold an unexpected value, iykyk. 🦋

✨ Synopsis ✨

bestie, here’s the exact declaration vibe check:

Defined in header <expected>
struct unexpect_t {

    explicit unexpect_t() = default;    (1) (since C++23)

};
inline constexpr unexpect_t unexpect{}; (2) (since C++23)

1. A tag type for in-place construction of an unexpected value in an std::expected object. 🏷️
2. A constant of type const std::unexpect_t which is usually directly passed to a constructor of std::expected to construct an unexpected value. 🎁

💅 Notes 💅

Like other construction tag types, unexpect_t is a trivial, empty class with an explicit default constructor. No cap, that’s literally the note. ✨

🦋 See also 🦋

• constructor — constructs the expected object (public member function)
• in_place, in_place_type, in_place_index — in-place construction tag
• in_place_t, in_place_type_t, in_place_index_t — (tag) (C++17)

and that’s the whole page, bestie 🫶. cute little sign-off: it’s sourced from http://cppreference.com, dated 2024.06.10, and the footer title is std::unexpe...td::unexpect(3) ✨