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delete expression

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C++
 
Linguagem C++
Tópicos gerais
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General topics
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Controle de fluxo
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Declarações execução condicional
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Funções
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Functions
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Expressões
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representações alternativas
Utilitários
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Tipos
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Alocação de memória
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Memory allocation
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delete expression
Classes
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Modelos
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Assembly embutido
 
Destrói objeto (s) anteriormente concedida pela <div class="t-tr-text"> nova expressão
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new expression
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e lançamentos obtidos área de memória
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Destructs object(s) previously allocated by the
nova expressão
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new expression
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</div> and releases obtained memory area
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[editar] Sintaxe

::(opcional)    delete    expression (1)
::(opcional)    delete [] expression (2)

[editar] Explicação

Objetos destrói, previamente construído pela expressão new e libera a área de memória obtido. O expression deve resultar em um valor de ponteiro que foi devolvido pela chamada anterior à expressão new. Para únicos objetos alocados a primeira versão da expressão deve ser utilizada, enquanto que para matrizes a segunda versão deve ser usada. Não há expressão de exclusão desalocando objetos inicializados pela colocação' novo, função desalocação e destruidor deve ser explicitamente chamado.
Original:
Destructs objects, previously constructed by new expression and releases the obtained memory area. The expression must result in a pointer value that was returned by previous call to the new expression. For single allocated objects the first version of the expression must be used, whereas for arrays the second version must be used. There is no delete expression deallocating objects initialized by placement new, deallocation function and destructor must be explicitly called.
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A memória é desalocado por um função desalocação, quer operator delete (para a primeira versão da expressão) ou operator delete[] (para a segunda versão da expressão).
Original:
The memory is deallocated by an função desalocação, either operator delete (for the first version of the expression) or operator delete[] (for the second version of the expression).
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O nome da função desalocação é em primeiro lugar procurado no local, classe' tipo de escopo e somente se a pesquisa falhar, o espaço global é procurado. Se :: está presente na expressão delete, somente o namespace global está olhou para cima. O protótipo da função deve ter a seguinte aparência:
Original:
The deallocation function's name is firstly looked up in the local class type scope and only if the lookup fails, the global namespace is looked up. If :: is present in the delete expression, only the global namespace is looked up. The prototype of the function must look like the following:
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void operator delete  (void *ptr);
 for the first version
void operator delete[](void *ptr);
 for the second version
Ambas as funções são declarados implicitamente em cada unidade de tradução. Além disso, as implementações implícitas são fornecidos pelo compilador por padrão, a menos que o programa foi implementado explicitamente eles. Veja este para mais informações.
Original:
Both these functions are implicitly declared in each translation unit. Also, implicit implementations are provided by the compiler by default, unless the program has explicitly implemented them. See este for more information.
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[editar] Palavras-chave

delete

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