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noexcept operator (desde C++11)

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C++
 
Linguagem C++
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Controle de fluxo
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declaração da função
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modelo de função
linha especificador
especificações de exceção (obsoleta)
noexcept especificador (C++11)
Exceções
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Exceptions
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decltype specifier (C++11)
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cv especificadores
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Assembly embutido
 
O operador noexcept executa uma verificação em tempo de compilação que retorna true se uma expressão for declarada a não lançar quaisquer exceções.
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The noexcept operator performs a compile-time check that returns true if an expression is declared to not throw any exceptions.
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Ele pode ser usado dentro de <div class="t-tr-text"> noexcept especificador
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noexcept specifier
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um modelo de função de declarar que a função irá lançar exceções para alguns tipos, mas não outros.
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It can be used within a function template's
noexcept especificador
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noexcept specifier
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</div> to declare that the function will throw exceptions for some types but not others.
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Índice

[editar] Sintaxe

noexcept( expression )
Retorna um objeto do tipo bool.
Original:
Returns an object of type bool.
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[editar] Explicação

O operador noexcept não avalia expression. O resultado é que o false expression contém pelo menos uma das seguintes construções potencialmente avaliados:
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The noexcept operator does not evaluate expression. The result is false if the expression contains at least one of the following potentially evaluated constructs:
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Em todos os outros casos, o resultado é true.
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In all other cases the result is true.
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[editar] Palavras-chave

noexcept

[editar] Exemplo

template <class T>
void self_assign(T& t) noexcept(noexcept(T::operator=)) 
{ // self_assign is noexcept if and only if T::operator= is noexcept
    t = t;
}


[editar] Veja também

noexcept especificador
requer uma função para não jogar qualquer (C++11) exceções
Original:
requires a function to not throw any exceptions (C++11)
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[edit]
especificação de exceção
especifica que as exceções são lançadas por um (obsoleta) função
Original:
specifies what exceptions are thrown by a function (obsoleta)
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[edit]
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