Go Type Switch

Internal

• Go Interfaces
• Type Assertion

Overview

A type switch is a new control structure introduced by Go and a generalization of the type assertion. While a type assertion checks whether a specific concrete type implements a given interface, the type switch generalizes this check for multiple options, helping with the discovery of the dynamic type for an interface variable:

var i SomeInterface = &SomeImplementation{data: "test"}
	
switch v := i.(type) {
case *SomeImplementation:
	...
case *SomeImplementationB:
	...
}