本文介绍了删除 NULL 指针是否安全?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
删除NULL指针安全吗?
Is it safe to delete a NULL pointer?
这是一种好的编码风格吗?
And is it a good coding style?
推荐答案
delete
无论如何都会执行检查,因此在您这边检查会增加开销并且看起来更丑陋.非常好的做法是在 delete
之后将指针设置为 NULL(有助于避免重复删除和其他类似的内存损坏问题).
delete
performs the check anyway, so checking it on your side adds overhead and looks uglier. A very good practice is setting the pointer to NULL after delete
(helps avoiding double deletion and other similar memory corruption problems).
如果 delete
默认情况下将参数设置为 NULL,就像在
I'd also love if delete
by default was setting the parameter to NULL like in
#define my_delete(x) {delete x; x = NULL;}
(我知道 R 和 L 的值,但这不是很好吗?)
(I know about R and L values, but wouldn't it be nice?)
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