NAME¶

std::bad_any_cast - std::bad_any_cast

Synopsis¶

Defined in header <any>
class bad_any_cast : public std::bad_cast; (since C++17)

Defines a type of object to be thrown by the value-returning forms of std::any_cast
on failure.

Member functions¶

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

std::bad_any_cast::bad_any_cast

bad_any_cast() noexcept; (1) (since C++17)
bad_any_cast( const bad_any_cast& other ) noexcept; (2) (since C++17)

Constructs a new bad_any_cast 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::bad_any_cast
then std::strcmp(what(), other.what()) == 0.

Parameters¶

other - another exception object to copy

std::bad_any_cast::operator=

bad_any_cast& operator=( const bad_any_cast& other ) noexcept; (since C++17)

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

Parameters¶

other - another exception object to assign with

Return value¶

*this

std::bad_any_cast::what

virtual const char* what() const noexcept; (since C++17)

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::bad_cast

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)