Assign a ListDigraph::ArcMap to a class attribute into a constructor c++

Question

I need the following:

create a class which does something with a graph
the modification on the graph and the related maps must be possible in different functions, so that all of them can change the global state of graph and maps
I have both graph and maps as attribute variable, and I want to define the map in the constructor, so I can create it when I create the object.

The problem is that I cannot assign to a class attribute a map. the error I get is the following:

'operator=' is a private member of 'lemon::DigraphExtender<lemon::ListDigraphBase>::ArcMap<int>'

when I try the assignment: this->length = ListDigraph::ArcMap<int>(g);

length and g are declared as public attributes of the class:

ListDigraph g;
ListDigraph::ArcMap<int> length;

rather than repeatedly asking questions about the same issue you should clarify one of the questions, by adding a [mcve] and the relevant details. Though, if the type has no accessible `operator=` then you cannot call its `operator=` no matter how hard you try — 463035818_is_not_an_ai, Jun 20 '23 at 08:16
constructors should not assign to members. A constructor should initialize members — 463035818_is_not_an_ai, Jun 20 '23 at 08:18
I cannot initialize the ArcMap after its declaration, that is the problem — Claudio Tomasi, Jun 20 '23 at 08:21
"I cannot initialize the ArcMap after its declaration, that is the problem" it is unclear what you mean by that. To get help with non-working code you need to show a [mcve] of the code — 463035818_is_not_an_ai, Jun 20 '23 at 08:22
The minimal reproducible example is in one of the question you already cited, that does not get answer — Claudio Tomasi, Jun 20 '23 at 08:23

0 Answers0