NAME¶

std::unexpect_t,std::unexpect - std::unexpect_t,std::unexpect

Synopsis¶

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.

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 (tag)
in_place_type_t
in_place_index_t
(C++17)