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I have two vectors:
one contains numbers and names of things;
second collects numbers that have already been showed to the user;
I’m trying to make a history list of all objects that have been shown.
Here is my code:
class palettArchive{
private:
std::vector<std::pair<int,std::string>> paletts;
int palletsCounter;
std::vector<int> choosen;
public:
//...
void history(){
auto printHist = [](int& i){
int tmp = i;
std::pair<int,std::string> tempPair = paletts[tmp];
std::cout << tempPair.first << " " << tempPair.second;
return 0;
};
std::for_each(choosen.begin(), choosen.end(), printHist);
}
};
There is an error:
error: 'this' cannot be implicitly captured in this context
std::pair<int,std::string> tempPair = paletts[tmp];
I can’t make a third vector
with the list that is created already. I need to make it by calling a function and printing at the time.
>Solution :
The lambda must capture this
to be able to access member variables:
auto printHist = [this](int& i){ ... };