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std::bad_array_new_length

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< cpp‎ | memory‎ | new
Revision as of 23:12, 31 May 2013 by P12bot (Talk | contribs)

 
 
 
 
 
 
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.

cpp/error/exceptioncpp/memory/new/bad allocstd-bad array new length-inheritance.svg
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Inheritance diagram

Contents

Member functions

constructs the bad_array_new_length object
(public member function)

Inherited from std::bad_alloc

Inherited from std::exception

Member functions

[virtual]
destructs the exception object
(virtual public member function of std::exception) [edit]
[virtual]
returns an explanatory string
(virtual public member function of std::exception) [edit]

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:

#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

allocation functions
(function) [edit]
exception thrown when memory allocation fails
(class) [edit]