CODEWITHSUNDEEP
c++indexingoperator-overloading
Raw305
Raw305

Reputation: 31

Overloading indexing operator

I'm trying to overload the indexing operator []. I have two versions and I need to use both of them, but when I build the project one of them is called and I get an error wherever I use the second one: Invalid operands to binary expression double and Quarters.

Here's the first one: 

Quarters& Security :: operator [] (QuarterType quarter){
    return quartersData[static_cast<int>(quarter)];
}

and the second one: 

const double& Security :: operator [] (QuarterType quarter) const{
    return (quartersData[static_cast<int>(quarter)].getPrediction());
}

What is the problem and what can I do to fix it?

Upvotes: 0

Views: 116

Answers (1)

Anton Savin
Anton Savin

Reputation: 41331

Overriding doesn't take into account the return type. Since in both cases the parameter types are the same, overriding takes into account only const-ness of the object. If your object is not const, then non-const version of operator[] will be called, regardless of what you are trying to do next with it.

Upvotes: 2

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