| Defined in header <new> | ||
|---|---|---|
class bad_alloc; |
std::bad_alloc is the type of the object thrown as exceptions by the allocation functions to report failure to allocate storage.
Inheritance diagram.
Member functions
| (constructor) | constructs the bad_alloc object (public member function) |
| operator= | replaces a bad_alloc object (public member function) |
| what | returns explanatory string (public member function) |
std::bad_alloc::bad_alloc
bad_alloc(); |
Constructs new bad_alloc object with an implementation-defined null-terminated byte string which is accessible through what().
Parameters
(none).
Exceptions
| (none) | (until C++11) |
noexcept specification: noexcept | (since C++11) |
std::bad_alloc::operator=
bad_alloc& operator=( const bad_alloc& other ); |
Assigns the contents of other.
Parameters
| other | - | another exception object to assign |
Return value
*this.
Exceptions
| (none) | (until C++11) |
noexcept specification: noexcept | (since C++11) |
std::bad_alloc::what
virtual const char* what() const; |
Returns the explanatory string.
Parameters
(none).
Return value
Pointer to a null-terminated string with explanatory information.
Exceptions
| (none) | (until C++11) |
noexcept specification: noexcept | (since C++11) |
Inherited from std::exception
Member functions
| (destructor)
[virtual] | destructs the exception object (virtual public member function of std::exception) |
| [virtual] | returns an explanatory string (virtual public member function of std::exception) |
Example
#include <iostream>
#include <new>
int main()
{
try {
while (true) {
new int[100000000ul];
}
} catch (const std::bad_alloc& e) {
std::cout << "Allocation failed: " << e.what() << '\n';
}
}Possible output:
Allocation failed: std::bad_alloc
See also
| allocation functions (function) |
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