| class bad_weak_ptr; |
(since C++11) | |
std::bad_weak_ptr is the type of the object thrown as exceptions by the constructors of std::shared_ptr that take std::weak_ptr as the argument, when the std::weak_ptr refers to an already deleted object.
Inheritance diagram
| (constructor) |
constructs a new bad_weak_ptr object (public member function) |
| operator= |
replaces the bad_weak_ptr object (public member function) |
| what |
returns the explanatory string (public member function) |
bad_weak_ptr() noexcept; |
(1) | (since C++11) |
bad_weak_ptr( const bad_weak_ptr& other ) noexcept; |
(2) | (since C++11) |
Constructs a new bad_weak_ptr 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_weak_ptr then std::strcmp(what(), other.what()) == 0.
| other | - | another exception object to copy |
bad_weak_ptr& operator=( const bad_weak_ptr& other ) noexcept; |
(since C++11) | |
Assigns the contents with those of other. If *this and other both have dynamic type std::bad_weak_ptr then std::strcmp(what(), other.what()) == 0 after assignment.
| other | - | another exception object to assign with |
*this
virtual const char* what() const noexcept; |
(since C++11) | |
Returns the explanatory string.
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.
Implementations are allowed but not required to override what().
| [virtual] |
destroys the exception object (virtual public member function of std::exception) [edit]
|
| [virtual] |
returns an explanatory string (virtual public member function of std::exception) [edit]
|
Run this code
Possible output:
std::bad_weak_ptr
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 2376 | C++11 | calling what on a default-constructed bad_weak_ptr was required to return "bad_weak_ptr"
|
the return value is implementation-defined |