1. 8.0.0
    Type OperatorSwiftBSONSwift

    ...(_:)

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

    static func ... (maximum: Self) -> PartialRangeThrough<Self>

    Parameters

    maximum

    The upper bound for the range.

    Overview

    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]
    print(numbers[...3])
    // Prints "[10, 20, 30, 40]"