Returns a partial range up to, and including, its upper bound.


prefix static func ... (maximum: DispatchWallTime) -> PartialRangeThrough<DispatchWallTime>



The upper bound for the range.


Use the prefix closed range operator (prefix ...) to create a partial range of any type that conforms to the Comparable protocol. This example creates a PartialRangeThrough<Double> instance that includes any value less than or equal to 5.0.

let throughFive = ...5.0

throughFive.contains(4.0)     // true
throughFive.contains(5.0)     // true
throughFive.contains(6.0)     // false

You can use this type of partial range of a collection’s indices to represent the range from the start of the collection up to, and including, the partial range’s upper bound.

let numbers = [10, 20, 30, 40, 50, 60, 70]
// Prints "[10, 20, 30, 40]"

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