std:: bad_any_cast
|
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()
.
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.
|
The returned string is encoded with the ordinary literal encoding during constant evaluation. |
(since C++26) |
Notes
Implementations are allowed but not required to override
what()
.
Inherited from std:: bad_cast
Inherited from std:: exception
Member functions
|
[virtual]
|
destroys the exception object
(virtual public member function of
std::exception
)
|
|
[virtual]
|
returns an explanatory string
(virtual public member function of
std::exception
)
|