stringenum

A go tool to auto-generate serialization / validation methods for enum types aliasing string.

Supports JSON, YAML serialization
Implements Validator interface
Does not support default values yet. But it has good fit with third-party default value modules like creasty/defaults because your types are basically a string!

Installation

You need to install stringenum to generate enum stub codes.

 $ go get github.com/therne/stringenum/...

On the top of your type definition sources, add go generate clause to generate stub codes with stringenum.

+ //go:generate stringenum Kind
package mytype

type Kind string

const (
    Apple  = Kind("apple")
    Google = Kind("google")
)

Then, run go generate to generate stub codes:

 $ go generate ./...

<Type>Values: A list of all available values in the enum.
<Type>FromString(string): Casts string into the enum. An error is returned if given string is not defined on the enum.
IsValid(): Returns false if the value is not defined on the enum.
Validate(): Returns an error if the value is not defined on the enum.
MarshalText / UnmarshalText: Implements encoding.TextMarshaler / TextUnmarshaler interface for JSON / YAML serialization.
String() : Casts the enum into a string. Implements fmt.Stringer interface.