std::bad_alloc

From cppreference.com

Defined in header `<new>`

class bad_alloc : public std::exception;

std::bad_alloc is the type of the object thrown as exceptions by the allocation functions to report failure to allocate storage.

Inheritance diagram

Inherited from std::exception

Member functions


(destructor) [virtual]	destructs the exception object (virtual public member function of `std::exception`)

what [virtual]	returns an explanatory string (virtual public member function of `std::exception`)

[edit] Example

run this code

#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';
    }
}

Output:

Allocation failed: std::bad_alloc

[edit] See also


operator new operator new[]	allocation functions (function)

Language
Standard library headers
Concepts
Utilities library
Strings library
Containers library
Algorithms library
Iterators library
Numerics library
Input/output library
Localizations library
Regular expressions library (C++11)
Atomic operations library (C++11)
Thread support library (C++11)


(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

Contents

[edit] Member functions

Inherited from std::exception

Member functions

[edit] Example

[edit] See also