A type that can be used to slice a collection.
protocol RangeExpression<Bound>A type that conforms to RangeExpression can convert itself to a Range<Bound> of indices within a given collection.
import Swiftassociatedtype Bound : ComparableThe type for which the expression describes a range.
func contains(_ element: Self.Bound) -> Bool Returns a Boolean value indicating whether the given element is contained within the range expression.
func relative<C>(to collection: C) -> Range<Self.Bound> where C : Collection, Self.Bound == C.Index Returns the range of indices described by this range expression within the given collection.
static func ~= (pattern: Self, value: Self.Bound) -> Bool Returns a Boolean value indicating whether a value is included in a range.