std::list : get next element
- by sheepsimulator
I'm trying to build a string using data elements stored in a std::list, where I want commas placed only between the elements (ie, if elements are {A,B,C,D} in list, result string should be "A,B,C,D".
This code does not work:
typedef std::list< shared_ptr<EventDataItem> > DataItemList;
// ...
std::string Compose(DataItemList& dilList)
{
std::stringstream ssDataSegment;
for(iterItems = dilList.begin();
iterItems = dilList.end();
iterItems++)
{
// Lookahead in list to see if next element is end
if((iterItems + 1) == dilList.end())
{
ssDataSegment << (*iterItems)->ToString();
}
else
{
ssDataSegment << (*iterItems)->ToString() << ",";
}
}
return ssDataSegment.str();
}
How do I get at "the-next-item" in a std::list using an iterator? I would expect that it's a linked-list, why can't I get at the next item?
