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std::bad_array_new_length

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std::bad_array_new_length
Member-Funktionen
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Member functions
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bad_array_new_length::bad_array_new_length
Geerbt von std::exception
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Inherited from std::exception
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exception::~exception
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Defined in header <new>
class bad_array_new_length;
(seit C++11)

std::bad_array_new_length is the type of the object thrown as exceptions by the new-Ausdrücken 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
Über dieses Bild

Inheritance diagram

Inhaltsverzeichnis

[Bearbeiten] Member-Funktionen

baut die bad_array_new_length Objekt
Original:
constructs the bad_array_new_length object
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(öffentliche Elementfunktion)

Inherited from std::bad_alloc

Inherited from std::exception

Member functions

[virtuell]
zerstört sich die Ausnahme-Objekt
Original:
destructs the exception object
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(virtuellen öffentlichen Member-Funktion of std::exception) [edit]
[virtuell]
gibt einen erläuternden String
Original:
returns an explanatory string
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(virtuellen öffentlichen Member-Funktion of std::exception) [edit]

[Bearbeiten] Notes

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

[Bearbeiten] Beispiel

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';
    }
}


[Bearbeiten] Siehe auch

Zuordnungsfunktionen
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allocation functions
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(Funktion) [edit]
Ausnahme ausgelöst, wenn die Speicherzuweisung fehlschlägt
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exception thrown when memory allocation fails
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(Klasse) [edit]