Reference

Making enums Functions that create enums
enum()	Create a new enumeration
as_enum()	Coerce lists, environments, and factors to enumerations
new_numeric_enum() new_generic_enum()	Enum constructors
enum-class	enum class
Validating enums Functions that validate the structure of enums
validate_enum_definition() validate_numeric_enum() validate_generic_enum()	Enum Validator
Type checking Functions that assist in type checking enums
is_enum() is_numeric_enum() is_generic_enum()	Test object inheritance
Enum()	Enum assertion type checking
S3 methods Functions defined for S3 dispatch
`[`(<enum>) `[[`(<enum>) `$`(<enum>) `$<-`(<enum>) `[<-`(<enum>) `[[<-`(<enum>)	Subsetting enums
print(<enum>)	Printing enums
length(<enum>) names(<enum>) as.list(<enum>) as.character(<enum>) as.numeric(<enum>) as.data.frame(<enum>)	General S3 Methods for Enums