std::bad_array_new_length

 

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std::bad_array_new_length

Member functions

bad_array_new_length::bad_array_new_length

Inherited from std::exception

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exception::what

 

Defined in header <new>
class bad_array_new_length;		(since C++11)

std::bad_array_new_length is the type of the object thrown as exceptions by the new-expressions to report invalid array lengths if

1) array length is negative

2) total size of the new array would exceed implementation-defined maximum value

3) the number of initializer-clauses exceeds the number of elements to initialize

Only the first array dimension may generate this exception; dimensions other than the first are constant expressions and are checked at compile time.

Inheritance diagram

Member functions

(constructor)

constructs the bad_array_new_length object (public member function)

Inherited from std::bad_alloc

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)

Notes

The override for the virtual member function what() may by provided, but is not required.

Example

Three conditions where std::bad_array_new_length should be thrown:

Run this code

#include <iostream>
#include <new>
#include <climits>
 
int main()
{
    int negative = -1;
    int small = 1;
    int large = INT_MAX;
    try {
        new int[negative];           // negative size
        new int[small]{1,2,3};       // too many initializers
        new int[large][1000000];     // too large
    } catch(const std::bad_array_new_length &e) {
        std::cout << e.what() << '\n';
    }
}

See also

operator newoperator new[]	allocation functions (function)
bad_alloc	exception thrown when memory allocation fails (class)