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Is there a point of doing somthing like this:
namespace status{ enum status{ ok, error }; } and use it like that status::ok
Or should i do this:
enum status{ status_ok, status_error }; and use it like this status_ok?
Update: With C++11 you now should do this:
enum class status { ok, error }; and use like this: status::ok
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In the C# language, enum (also called enumeration) is a user-defined value type used to represent a list of named integer constants. It is created using the enum keyword inside a class, structure, or namespace. It improves a program's readability, maintainability and reduces complexity.
Enum, which is also known as enumeration, is a user-defined data type that enables you to create a new data type that has a fixed range of possible values, and the variable can select one value from the set of values.
Nope. it is not possible. Enum can not inherit in derived class because by default Enum is sealed.
In C#, an enum (or enumeration type) is used to assign constant names to a group of numeric integer values. It makes constant values more readable, for example, WeekDays. Monday is more readable then number 0 when referring to the day in a week.
I personally don't like the second variation because the status_ part seems redundant to me. The former version avoids that problem, but having a type status::status looks strange too. Furthermore, a namespace is open to modification, so in case somebody did something like
namespace status { void error( const char *msg ); } You would get a compiler error since the function error clashes with your enum value.
I prefer to use a third variation:
struct MouseButton { enum Value { Left, Middle, Right }; }; This lets me write functions like
void handleMouseButton( MouseButton::Value b ) { switch ( b ) { case MouseButton::Left: // ... case MouseButton::Middle: // ... case MouseButton::Right: // ... } } If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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