from the doc ``` sealed class Expr data class Const val numb kotlinlang #announcements

from the doc: ``` sealed class Expr data class Con...

jdorleans

09/20/2017, 2:59 AM

from the doc:

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sealed class Expr
data class Const(val number: Double) : Expr()
data class Sum(val e1: Expr, val e2: Expr) : Expr()