struct with 2 cells vs std::pair?

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What is the difference between using a struct with two fields and a pair?

Dear all,

I have a little question about pairs and struct. Is there any advantage to use a std::pair instead of a struct with two cells ? I have used pairs for a while but the main problem is readability : If you want to represent for example a duple (int "label", double "value") you can use either a :

typedef std::pair myElem;

or a

typedef struct {
    int label;
    double value;
} myElem;

The code becomes more readable if your statements have a "semantic" sense (you will always know what x.label is. that's not the case with x.first).

However, I guess there is an advantage using pair. Is it more performant or something else?

struct with 2 cells vs std::pair?

5 Answers