kotlin.util.Ranges.kt Maven / Gradle / Ivy
@file:kotlin.jvm.JvmMultifileClass
@file:kotlin.jvm.JvmName("RangesKt")
package kotlin
/**
* Represents a range of [Comparable] values.
*/
private class ComparableRange> (
override val start: T,
override val endInclusive: T
): ClosedRange {
override fun equals(other: Any?): Boolean {
return other is ComparableRange<*> && (isEmpty() && other.isEmpty() ||
start == other.start && endInclusive == other.endInclusive)
}
override fun hashCode(): Int {
return if (isEmpty()) -1 else 31 * start.hashCode() + endInclusive.hashCode()
}
override fun toString(): String = "$start..$endInclusive"
}
/**
* Creates a range from this [Comparable] value to the specified [that] value. This value
* needs to be smaller than [that] value, otherwise the returned range will be empty.
*/
public operator fun > T.rangeTo(that: T): ClosedRange = ComparableRange(this, that)
internal fun checkStepIsPositive(isPositive: Boolean, step: Number) {
if (!isPositive) throw IllegalArgumentException("Step must be positive, was: $step")
}