// 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
}