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std::bad_array_new_length

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< cpp‎ | memory‎ | new

 
 
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std::bad_array_new_length
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bad_array_new_length::bad_array_new_length
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Defined in header <new>
class bad_array_new_length;
(a partir do C++ 11)

std::bad_array_new_length is the type of the object thrown as exceptions by the novos-expressões 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
Sobre esta imagem

Inheritance diagram

Índice

[editar] Funções de membro

constrói o objeto bad_array_new_length
Original:
constructs the bad_array_new_length object
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(função pública membro)

Inherited from std::bad_alloc

Inherited from std::exception

Member functions

[virtual]
destrói o objeto de exceção
Original:
destructs the exception object
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(of std::exception função pública virtual membro) [edit]
[virtual]
retorna uma cadeia explicativa
Original:
returns an explanatory string
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(of std::exception função pública virtual membro) [edit]

[editar] Notas

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

[editar] Exemplo

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';
    }
}


[editar] Veja também

funções de alocação
Original:
allocation functions
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(função) [edit]
exceção lançada quando a alocação de memória falha
Original:
exception thrown when memory allocation fails
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(classe) [edit]