Structural Patterns in Go

Adapter, Decorator, Facade

Core
2026-04-17T12:05:42+00:00
Implement Adapter, Decorator, and Facade patterns in Go by defining interfaces and creating wrapper structs that compose existing types.

Go does not have built-in structural design patterns like Adapter, Decorator, or Facade; you implement them using interfaces and composition. Define an interface for the behavior you need, then create a struct that wraps the target type and implements that interface to adapt or decorate it.

type Logger interface {
    Log(msg string)
}

type StdLogger struct{}
func (s *StdLogger) Log(msg string) { fmt.Println(msg) }

type DecoratedLogger struct {
    Logger
    prefix string
}
func (d *DecoratedLogger) Log(msg string) {
    d.Logger.Log(d.prefix + ": " + msg)
}