R Programming By Example

Public methods and polymorphism

We have already defined the methods we want in the previous piece of code, so for completeness, we will only show how to call these methods now. As you can see, you simply use the $ operator to access a public attribute or a public method, and if it's a method, you add the parentheses at the end (surrounding any parameters you want to send as you normally would):

R6_rectangle$own_print()#> [1] "blue rectangle: 2 x 3 == 6"R6_rectangle$area()#> [1] 6R6_rectangle$color()#> [1] "blue"