Why enum instead of enum class?

Question

Since I started coding in C++11 I prefer declaring my enums as enum class (specifying the storage type i.e. enum class X:unsigned short{a,b,c}) so enforcing that only that type is allowed... Of course you can static_cast, but, not only i feel more confident on defining functions that accept a enum class, but also is a lot easier and obvious to write and read a value fot that parameter. 

Why don't you use enum class in Casablanca classes/functions since this is a C++11 library anyway?

(sorry if this is a newbie question)

Thanks in advance for the clarification

Fernando

Answer 1

Visual Studio 2010 does not support it and we very dearly wanted Casablanca to work with that version of VS, too.

Niklas