# std::expected<T,E>::operator bool, std::expected<T,E>::has_value

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< cpp‎ | utility‎ | expected

constexpr explicit operator bool() const noexcept; |  | (since C++23)
constexpr bool has_value() const noexcept; |  | (since C++23)

Checks whether *this contains an expected value.

### Parameters

(none)

### Return value

true if *this contains an expected value, false if *this contains an unexpected value.

### Notes

A `std::expected` object is never empty. If `has_value()` returns true, `operator*` can be used to access the contained value; otherwise, `error()` can be used.

### Example

| This section is incomplete Reason: no example

### See also

operator->operator* (C++23) | accesses the expected value (public member function)
error (C++23) | returns the unexpected value (public member function)

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