参数的最佳实践？ [英] best practice for parameters?

问题描述

通常认为传递参数作为指针，而不是作为值，当你可以更好？显然，它在很大程度上取决于情况，但是当有一个选择，是否更好使用指针？

这只是为了记忆的原因吗？

如果是真的，指针或引用？

解决方案

一些一般的经验法则：

如果需要修改它，请传递一个指针或引用。如果值可能为null，则传递一个指针，否则传递一个引用。

如果大，传递一个const指针或const引用，

如果使用指针，则更喜欢智能指针指向裸指针。

否则，传递值。 / p>

Is it generally considered better to pass parameters as pointers rather than as value when you can? Obviously it largely depends on the situation, but when there is a choice, is it better to use pointers?

Is this simply for reasons of memory?

And what is better to pass through if it is true, a pointer or a reference?

解决方案

Some general rules of thumb:

If you need to modify it, pass a pointer or a reference. If the value might be null, pass a pointer, otherwise pass a reference.

If it's large, pass a const pointer or const reference, depending on whether null is a legal value.

If using pointers, prefer smart pointers to bare pointers.

Otherwise, pass by value.

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