What are the advanced features of maps and sets in C++17?

What are the advanced features of maps and sets in C++17?

C++17 introduced several enhancements for maps and sets, including the new std::optional and std::variant types, which can be used with these containers.

Can you explain how std::optional works with maps?

Sure! std::optional allows you to represent values that may or may not be present. In a map, you can use it as the value type to indicate that a key might not have an associated value.

What about the performance improvements in C++17 for these containers?

C++17 includes optimizations like improved memory allocation and better handling of small objects, which can enhance the performance of maps and sets.

Are there any new algorithms introduced for maps and sets?

Yes, C++17 introduced new algorithms like std::for_each_n that can be used with maps and sets, allowing for more efficient iterations.