Distance.kt

sealed class Distance : Comparable<Distance> {
    data class DistanceMeters(val value: Float) : Distance()
    data class DistanceFeet(val value: Float) : Distance()

    fun toMeters() = when (this) {
        is DistanceMeters -> this
        is DistanceFeet -> DistanceMeters(value * .3048f)
    }

    fun toFeet() = when (this) {
        is DistanceMeters -> DistanceFeet(value / .3048f)
        is DistanceFeet -> this
    }

    override fun compareTo(other: Distance): Int {
        return this.toMeters().value.compareTo(other.toMeters().value)
    }
}

fun Location.distanceMetersTo(other: Location) = DistanceMeters(distanceTo(other))

val Int.meters get() = DistanceMeters(this.toFloat())

fun foo(location1: Location, location2: Location) {
    if (location1.distanceMetersTo(location2) < 100.meters) {
        
    }
}