std::bad_expected_access
Defined in header <expected>
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template
<
class E >
class bad_expected_access : public std:: bad_expected_access < void > |
(1) | (since C++23) |
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template
<>
class bad_expected_access< void > : public std::exception |
(2) | (since C++23) |
bad_expected_access<E>
bad_expected_access<void> is the base class of all other bad_expected_access specializations.| This section is incomplete Reason: inheritance diagram |
Members of the primary template
(constructor) |
constructs a bad_expected_access object (public member function) |
error |
returns the stored value (public member function) |
what |
returns the explanatory string (public member function) |
std::bad_expected_access::bad_expected_access
explicit bad_expected_access( E e ); |
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Constructs a new bad_expected_access<E> object. Initializes the stored value with std::move(e).
std::bad_expected_access::error
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const E& error(
)
const
&
noexcept
;
E& error(
)
&
noexcept
;
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Returns a reference to the stored value.
std::bad_expected_access::what
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const
char
* what(
)
const
noexcept override;
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Returns the explanatory string.
Parameters
(none)
Return value
Pointer to a null-terminated string with explanatory information. The string is suitable for conversion and display as a std::wstring
Notes
Implementations are allowed but not required to override what().
Members of the bad_expected_access<void> specialization
(constructor) |
constructs a bad_expected_access<void> object (protected member function) |
(destructor) |
destroys the bad_expected_access<void> object (protected member function) |
operator= |
replaces the bad_expected_access<void> object (protected member function) |
what |
returns the explanatory string (public member function) |
Special member functions of bad_expected_access<void> are protected. They can only be called by derived classes.
Example
| This section is incomplete Reason: no example |