std::unexpect_t, std::unexpect
Defined in header <expected> | ||
|---|---|---|
struct unexpect_t { explicit unexpect_t() = default; };
| (1) | (since C++23) |
inline constexpr std::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 conststd::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
constructs the expected object (public member function) |
|
|
(C++17) | in-place construction tag (tag) |
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