enum item declares both the type and a number of variants, each of which is independently named and has the syntax of a struct, tuple struct or unit-like struct.
New instances of an
enum can be constructed in an enumeration variant expression.
enum value consumes as much memory as the largest variant for its corresponding
enum type, as well as the size needed to store a discriminant.
Enum types cannot be denoted structurally as types, but must be denoted by named reference to an
enum type is analogous to a
data constructor declaration in ML, or a pick ADT in Limbo.
© 2010 The Rust Project Developers
Licensed under the Apache License, Version 2.0 or the MIT license, at your option.