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ezura/CodePiece.kt

Created June 18, 2017 12:39
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Nothing は全ての型サブタイプ && `interface List<out E>` だからこの `emptyList` の実装できるのかな (｡ ・ω・)) #CodePiece #kotlin
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CodePiece.kt
fun <T> listOf(vararg elements: T): List<T> = if (elements.size > 0) elements.asList() else emptyList()
fun <T> emptyList(): List<T> = EmptyList
object EmptyList : List<Nothing>
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