enum.cpp

// Simple rule: always use C++11 enum class, never the old C-style enums.
//
// - http://stackoverflow.com/questions/18335861/why-is-enum-class-preferred-over-plain-enum
// - http://stackoverflow.com/questions/4506750/how-do-i-use-the-enum-value-from-a-class-in-another-part-of-code
// - http://stackoverflow.com/questions/10869790/best-practices-for-enum-in-c

#include "common.hpp"

int main() {
    // Unlike C, already does typedef, no need to write enum all the time.
    {
        enum E {A, B, C};
        E e = A;
    }

#if __cplusplus >= 201103L
    // Set storage size.
    {
        enum E : char {A, B, C};
        assert(sizeof(E) == sizeof(char));
    }

    // # scoped enumeration
    //
    // Much better than the older raw enum, just always use it.
    {
        enum class ClassEnum {
            A,
            B
        };

        // Error. YES, namespaces!
        //ClassEnum classEnum = A;

        ClassEnum classEnum = ClassEnum::A;

        // No conversion insanity.
        //int i = ClassEnum::A;
    }

    // # enum to string
    //
    // C++14 nope:
    //
    // - http://stackoverflow.com/questions/201593/is-there-a-simple-way-to-convert-c-enum-to-string
    // - http://stackoverflow.com/questions/28828957/enum-to-string-in-modern-c-and-future-c17-c20
#endif
}