本文介绍了如何使用 std::reverse_iterator 擦除 *AND CONTINUE*?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
我一直在使用 stackoverflow,甚至是非常非常好的 Dr.Dobbs 的文章,但我找不到这个问题的明确答案.
I've been up and down stackoverflow and even the very, very nice Dr. Dobbs article but I can't find a definitive answer to the question.
部分问题的答案std有什么缺点::reverse_iterator? 说这可能根本不可能.
A section of the answer to the question What are the shortcomings of std::reverse_iterator? says that it might not be possible at all.
std::list::reverse_iterator it = list.rbegin();
while( it != list.rend() )
{
int value=*it;
if( some_cond_met_on(value) )
{
++it;
list.erase( it.base() );
}
else
{
++it;
}
}
PS:我知道还有其他替代方法,例如erase_if(),但我正在寻找这个特定问题的答案.
PS: I do know there are other alternatives, such as erase_if(), but I'm looking for an answer to this specific question.
推荐答案
应该就是
std::list<int>::reverse_iterator it = list.rbegin();
while( it != list.rend() )
{
int value=*it;
if( some_cond_met_on(value) )
{
++it;
it= reverse_iterator(list.erase(it.base()); // change to this!
}
else
{
++it;
}
}
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