What is the difference regarding memory allocation and efficiency between using a struct with two fields and a pair?
What is the difference regarding memory allocation and efficiency between using a struct with
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What is the difference regarding memory allocation and efficiency between using a struct with two fields and a pair?
std::pairprovides pre-written constructors and comparison operators. This also allows them to be stored in containers like std::map without you needing to write, for example, the copy constructor or strict weak ordering viaoperator <(such as required bystd::map). If you don’t write them you can’t make a mistake (remember how strict weak ordering works?) so it’s more reliable just to usestd::pair.