Re: how to iterator and delete elements in std::set
On 22/11/2010 13:49, Bogdan wrote:
On Nov 22, 1:12 am, zl2k<kdsfin...@gmail.com> wrote:
hi, there
Here is what I want to do: I have a set of objects. I need to iterate
each of them to ask if it needs to be eliminated. If yes, I'll erase
it from the set. I don't know which needs to be erased before I touch
it.
std::set<Obj> objs;
...
for (auto obj_iterator = objs.begin(); obj_iterator != objs.end(); +
+obj_iterator){
if (obj_iterator.do_you_want_to_be_erased() == true){
objs.erase(*obj_iterator);
}
}
Now I have the trouble since the iterator is destroyed after the first
erase. What is the proper way to do the job? Thanks.
zl2k
It was some time ago a discussion on this list about this issue.
Indeed, it seems strange to erase the object to which the iterator
points to, but running your snippet exactly as is still produces the
right answer.
No it doesn't. See else-thread for the right answer.
/Leigh
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