std::bad_any_cast
Defined in header <any>
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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.
Contents |
[edit] 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.
Return value
Pointer to an implementation-defined 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 )
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[virtual] |
returns an explanatory string (virtual public member function of std::exception )
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