这看起来是否正确？ [英] Does this look correct?

问题描述

我想向后查看std :: list ....


std :: list< mytype> :: reverse_iterator it;


for（it = out.rbegin（）; it！= out.rend（）; - ））

{

...

}

I want to go through a std::list backwards....

std::list<mytype>::reverse_iterator it;

for (it=out.rbegin(); it != out.rend(); --it)
{
...
}

推荐答案

JustSomeGuy写道：

JustSomeGuy wrote:

我想通过一个标准： ：向后列出....

std :: list< mytype> :: reverse_iterator it;

for（it = out.rbegin（）; it！= out。 rend（）; - ））
{
...
}

I want to go through a std::list backwards....

std::list<mytype>::reverse_iterator it;

for (it=out.rbegin(); it != out.rend(); --it)
{
...
}

看起来正确。唯一的事情是，如果你修改

迭代中的列表，那么迭代器_may_就会变得无效。如果

你的'''''包含类似


out.erase（it）;

$ b $那么这是一个错误，因为''它'在那之后是无效的。另外，那里有
似乎没有必要在''for'之外声明''它''。保持紧张：


for（std :: list< mytype> :: reverse_iterator it = out.rbegin（）; ...


V

-

请在邮寄回复时从我的地址删除资金

Looks correct. The only thing is that if you modify the list in the
middle of iterating through it, the iterator _may_ become invalid. If
your ''...'' contain something like

out.erase(it);

then it''s a mistake because ''it'' is invalid after that. Also, there
seems to be no need to declare ''it'' outside of the ''for''. Keep it tight:

for (std::list<mytype>::reverse_iterator it = out.rbegin(); ...

V
--
Please remove capital As from my address when replying by mail

所以 - 它是正确的...它不是++它（在for循环控制中）

So the --it is correct... It isn''t ++it (In the for loop control)

JustSomeGuy写道：

JustSomeGuy wrote:

所以-it是正确的...它不是++它（在for循环控件中）

So the --it is correct... It isn''t ++it (In the for loop control)

许多迭代器都可以实现作为指针，所以...


-

Phlip
http://www.greencheese.org/ZeekLand < - 不是博客!!!

Many iterators can implement as pointers, so...

--
Phlip
http://www.greencheese.org/ZeekLand <-- NOT a blog!!!

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