Kotlin: Type Alias

How type alias is useful

• Sometimes when we use a particular keyword, class, or any type in many places, There are scenarios we want it to be more readable.
• Just to make it readable we don't have to push it to another custom class because it will change the type.
• Kotlin provides type-alias, by using it we can give our name to the type without altering it.
• As seen in the example below, We gave AuthToken and we can directly use it and the type remains String

Code

Declaring TypeAlias

typealias AuthToken = String

Usage of TypeAlias

class TypeAliasVm @Inject constructor( ) : ViewModel() {
    data class Student(val name : String, val age : Int, val authTolken : AuthToken)
    data class Teacher(val name : String, val age : Int, val authTolken : AuthToken)

    fun demo() {
        val dataOne = Student(name = "Mahesh", age = 20 , authTolken = "282828fhisb")
        val dataTwo = Teacher(name = "Suresh", age = 40 , authTolken = "282828fhisb")

        println(dataOne.authTolken)
        println(dataTwo.authTolken)
    }
}