C++ vector of pairs of references to structures

Asked May 12 '17 at 22:42

Active May 12 '17 at 23:36

Viewed 67 times

I have vector of structures like this:

struct myStructure {
    int x;
};
vector <myStructure> vectorOfMyStructures;

then I push some (many) of my structures to this vector. Next think I do is declaring vector of pairs of those structures:

vector < pair<myStructure, myStructure> > *vectorOfPairsOfMyStructures;

the thing I want to achieve is declaring this vector of pairs to store only references to original structures in first vector (I will have line n^2 of those pairs), but following approach does not work:

vectorOfPairsOfMyStructures->push_back(make_pair(&myStructure1, &myStructure2));

How can I properly declare and add to vector of pairs of references of structures?

Why not duplicate?
1. I want to put references of structures to pair, not vector
2. I operate on c++ 98 (cannot use reference_wrapper)

edited May 12 '17 at 23:36

asked May 12 '17 at 22:42

Jakub Pastuszuk

not a perfect dupe, but the second answer can help you – 463035818_is_not_an_ai May 12 '17 at 22:45
I want to put reference of structure to pair, not vector itself – Jakub Pastuszuk May 12 '17 at 22:48
you also cant have a pair of references for the very same reason – 463035818_is_not_an_ai May 12 '17 at 22:50
see here http://stackoverflow.com/questions/3769781/stdpair-of-references – 463035818_is_not_an_ai May 12 '17 at 22:50
Well, the C++98 bit settles this then. – Baum mit Augen May 12 '17 at 22:51
[here](https://gcc.gnu.org/onlinedocs/libstdc++/libstdc++-api-4.6/a00887_source.html#l00422) you can find an implementation of `std::reference_wrapper` it isnt easy to read at all, but it can give you a hint of what you would need to write your custom wrapper – 463035818_is_not_an_ai May 12 '17 at 22:55
well I just realized that the implentation uses a pointer to the referenced object, so you might as well simply use pointers instead of references ;) – 463035818_is_not_an_ai May 12 '17 at 22:57
Will try with this – Jakub Pastuszuk May 12 '17 at 23:01

C++ vector of pairs of references to structures

0 Answers0