std::unexpect_t, std::unexpect

Since C++23

Header: <expected>

  1. A tag type for in-place construction of an unexpected value in an std::expected object.

# Declarations

struct unexpect_t { explicit unexpect_t() = default; };

(since C++23)

inline constexpr std::unexpect_t unexpect{};

(since C++23)

# Notes

Like other construction tag types, unexpect_t is a trivial, empty class with an explicit default constructor.

# See also