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Difference between revisions of "cpp/memory/new/bad array new length"

From cppreference.com
< cpp‎ | memory‎ | new
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class bad_array_new_length;
 
class bad_array_new_length;
 
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{{tt|std::bad_array_new_length}} is the type of the object thrown as exceptions by the [[cpp/language/new|new-expressions]] to report invalid array lengths if
 
{{tt|std::bad_array_new_length}} is the type of the object thrown as exceptions by the [[cpp/language/new|new-expressions]] to report invalid array lengths if
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===Member functions===
 
===Member functions===
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===Example===
 
===Example===
 
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#include <iostream>
 
#include <iostream>
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===See also===
 
===See also===
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[[de:cpp/memory/new/bad array new length]]
 
[[de:cpp/memory/new/bad array new length]]

Revision as of 19:14, 31 May 2013

Template:cpp/memory/new/bad array new length/navbar

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

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]
 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]

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

Template:cpp/memory/new/dcl list operator newTemplate:cpp/memory/new/dcl list bad alloc
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