Kotlin pipe forward operator implemented with an infix function, featuring classic functional paradigms like partial functions and function currying.

PipeOperator.kt

typealias id<T> = (T) -> T
typealias rec_bin<T> = T.(T) -> T

inline infix fun<T> T.`|`(fnc: id<T>) = this.let(fnc)
inline infix fun<T> id<T>.`|`(crossinline fnc: id<T>): id<T> = { this(it) `|` fnc }

fun<T> partial(op: rec_bin<T>, operand: T): id<T> = { it.op(operand) }

val addCinque = partial(Int::plus, 5)
val negative = partial(Int::times, -1)

fun main() {
    val pipe = addCinque `|` negative
    println(4 `|` negative `|` pipe)
}