enum with no integer and no error

Conceptually, an enumerated type is similar to a list of nominals (numeric codes), since each possible value of the type is assigned a distinctive natural number.

So some languages have left from concept. :)

Conceptually, an enumerated type is similar to a list of nominals (numeric codes), since each possible value of the type is assigned a distinctive natural number.

So some languages have left from concept. :)

Possibly, if you look at the beginning of the wiki page you'll see:

In computer programming, an enumerated type (also called enumeration, enum, or factor in the R programming language, and a categorical variable in statistics) is a data type consisting of a set of named values called elements, members, enumeral, or enumerators of the type

If you look at enumeration on wikipedia, you'll see:

An enumeration is a complete, ordered listing of all the items in a collection. The term is commonly used in mathematics and computer science to refer to a listing of all of the elements of a set.

Elements in a set are not integers by definition. It can be anything in that set.

In any case, I don't think strings should be dropped from being used in enums, but rather, the documentation should be updated.