Questions tagged [stdadvance]
7 questions
10
votes
2 answers
How is std::advance implemented to change behavior on iterator type?
What we know about std::advance is the following:
template
void advance (InputIterator& i, Distance n);
Purpose
Advances the iterator i by n elements.
If i is a Random Access Iterator, the function uses once…
Narek
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6
votes
4 answers
advance the iterator of a standard map
The main question is already in the title: How do I advance the iterator of a standard map?
But since most people ask why I need this, I'll provide some more information:
I have a class which has several maps. I have at least 2 differential…
Rico-E
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2
votes
1 answer
advance iterator in loop
is there any reason why this works well
vector* myVec; //assume this contains CalcToken
for(vector::iterator it = myVec->begin() ; it != myVec->end() ; advance(it,1)) {
cout<< (*it)->toString()<< " ";
}
and this…
Etian Chamay
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1
vote
4 answers
C++ - How to enable ADL with advance() on iterators in custom templated data container?
Here's a container:
namespace container_namespace
{
template >
class container
{
// stuff
class iterator
{
// stuff
};
};
}
Where in the…
metamorphosis
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1
vote
1 answer
std::advance of std::multimap end() iterator by negative number crashes
My app crashed on this operation:
std::multimap> mm;
// insert elements
auto it = mm.end();
std::advance(it, -(mm.size() - 7));
Here is the message of crash:
Expression: map/set iterator not incrementable
What…
Narek
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1
vote
1 answer
Is there something like circular_advance avaliable in std or boost?
lets say I want to go through container in a circular way:
idx = 0, idx =1 .. idx = size()-1, idx =0, idx =1 ...
Is there a way to do in with std or boost?
I know that algorithms operate on ranges not on containers so I guess Im out of luck, but…
NoSenseEtAl
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0
votes
1 answer
c++: std::advance (once) goes to end of list
I've never walked into the following problem with iterators, so I really do not know where the solution might start. I have a LIST "StringOfPearls" which is permuted right before I do the following:
DNAr = StringOfPearls->begin(); // Added 1 element…
Brem
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