NAME¶

std::experimental::bad_optional_access - std::experimental::bad_optional_access

Synopsis¶

Defined in header <experimental/optional>
class bad_optional_access; (library fundamentals TS)

Defines a type of object to be thrown by std::experimental::optional::value when
accessing an optional object that does not contain a value.

std-bad optional access-inheritance.svg

Inheritance diagram

Member functions¶

constructor constructs a new bad_optional_access object
(public member function)
operator= replaces the bad_optional_access object
(public member function)
what returns the explanatory string
(public member function)

std::experimental::bad_optional_access::bad_optional_access

bad_optional_access() noexcept; (1) (library fundamentals TS)
bad_optional_access( const bad_optional_access& other (2) (library fundamentals TS)
) noexcept;

Constructs a new bad_optional_access object with an implementation-defined
null-terminated byte string which is accessible through what().

1) Default constructor.
2) Copy constructor. If *this and other both have dynamic type
std::experimental::bad_optional_access then std::strcmp(what(), other.what()) == 0.

Parameters¶

other - another exception object to copy

std::experimental::bad_optional_access::operator=

bad_optional_access& operator=( const (library fundamentals TS)
bad_optional_access& other ) noexcept;

Assigns the contents with those of other. If *this and other both have dynamic type
std::experimental::bad_optional_access then std::strcmp(what(), other.what()) == 0
after assignment.

Parameters¶

other - another exception object to assign with

Return value¶

*this

std::experimental::bad_optional_access::what

virtual const char* what() const noexcept; (library fundamentals TS)

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. The pointer is guaranteed to
be valid at least until the exception object from which it is obtained is destroyed,
or until a non-const member function (e.g. copy assignment operator) on the
exception object is called.

Notes¶

Implementations are allowed but not required to override what().

Inherited from std::logic_error

Inherited from std::exception

Member functions¶

destructor destroys the exception object
[virtual] (virtual public member function of std::exception)
what returns an explanatory string
[virtual] (virtual public member function of std::exception)

Category:¶

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