std::expected<T,E>::operator bool, std::expected<T,E>::has_value
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C++
Utilities library
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std::expected
Member functions | ||||
Observers | ||||
expected::operator boolexpected::has_value | ||||
Monadic operations | ||||
Modifiers | ||||
Non-member functions | ||||
Helper classes | ||||
constexpr
explicit operator bool
(
)
const
noexcept
;
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(1) | (since C++23) |
constexpr
bool has_value(
)
const
noexcept
;
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(2) | (since C++23) |
Checks whether *this represents an expected value.
Return value
Notes
A std::expected
object is never valueless. If has_value()
returns true, operator*()
can be used to access the expected value; otherwise, error()
Example
This section is incomplete Reason: no example |
See also
accesses the expected value (public member function) |
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returns the unexpected value (public member function) |