Artem Kobzar
26 lines
689 B
Kotlin
Vendored
26 lines
689 B
Kotlin
Vendored
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// FILE: 1.kt
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interface Service {
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fun send(message: String): String
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}
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inline fun Service.decorate(crossinline decorate: (Service) -> Service): Service =
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object : Service by decorate(this) {}
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inline fun Service.transformMessage(crossinline transform: (String) -> String) =
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decorate { service ->
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object : Service {
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override fun send(message: String): String =
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service.send(transform(message))
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}
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}
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// FILE: 2.kt
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fun Service.append(suffix: String): Service =
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transformMessage { it + suffix }
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fun box(): String =
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object : Service {
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override fun send(message: String): String = message
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}.append("K").send("O")
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