Summary

An enum creates a new data type

An enum data type can have different variants

Each enum value is always one of those variants

The variants can have 0 or more fields

Using the match expression, you can pattern match against values to determine which variant you’re using

Match arms have a pattern, a fat arrow =>, and an expression

If your arm’s expression is a block, the comma following the block is optional

enums can have impl blocks, trait implementations, and can derive traits

enums can have type parameters

A common pattern in Rust is to use the Option<T> enum to represent an optional result

Using match expressions, you can capture the values in fields into a variable