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c++stlsetcontains

How to check that an element is in a std::set?

How do you check that an element is in a set?

Is there a simpler equivalent of the following code:

myset.find(x) != myset.end()
Solution

  • Starting with C++20 you can use contains to check for existence in many STL containers such as std::map, std::set, ...:

    const bool is_in = container.contains(element);

    Pre C++20 the typical way was:

    const bool is_in = container.find(element) != container.end();