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inline specifier

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[editar] Sintaxe

inline function_declaration

[editar] Descrição

A palavra-chave inline é uma dica dada para o compilador para realizar uma otimização. O compilador tem a liberdade de ignorar este pedido.
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The inline keyword is a hint given to the compiler to perform an optimization. The compiler has the freedom to ignore this request.
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Se o compilador inlines a função, que substitui todas as chamadas dessa função com o corpo real (sem gerar uma chamada).
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If the compiler inlines the function, it replaces every call of that function with the actual body (without generating a call).
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Isso evita sobrecarga extra criado pela chamada de função (colocar dados na pilha e recuperar o resultado), mas pode resultar em um maior executável como o código para a função tem de ser repetido várias vezes.
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This avoids extra overhead created by the function call (placing data on stack and retrieving the result) but it may result in a larger executable as the code for the function has to be repeated multiple times.
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O resultado é semelhante ao -função como macros
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The result is similar to -função como macros
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O corpo da função deve ser visível na unidade de tradução atual.
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The function body must be visible in the current translation unit.
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Métodos de classe definidas dentro do corpo da classe são declarados implicitamente em linha.
Original:
Class methods defined inside the class body are implicitly declared inline.
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[editar] Exemplo

inline int sum(int a, int b) 
{
    return (a + b);
}
 
int c = sum(1, 4);
// if the compiler inlines the function the compiled code will be the same as writing
int c = 1 + 4;