Cannot invoke initializer for type ‘Range’ with an argument list of type ‘(Range)’

by

Some background:

In Swift 3, additional range types were introduced, making a total
of four (see for example Ole Begemann: Ranges in Swift 3):

Range, ClosedRange, CountableRange, CountableClosedRange

With the implementation of SE-0143 Conditional conformances in Swift 4.2, the “countable” variants
are not separate types anymore, but (constrained) type aliases, for example

 public typealias CountableRange<Bound: Strideable> = Range<Bound>
      where Bound.Stride : SignedInteger

and, as a consequence, various conversions between the different
range types have been removed, such as the

init(_ other: Range<Range.Bound>)

initializer of struct Range. All theses changes are part of the
[stdlib][WIP] Eliminate (Closed)CountableRange using conditional conformance (#13342) commit.

So that is the reason why 

let range: Range<Index> = Range<Index>(start..<self.endIndex)

does not compile anymore.

How to fix

As you already figured out, this can be simply fixed as 

let range: Range<Index> = start..<self.endIndex

or just

let range = start..<self.endIndex

without the type annotation.

Another option is to use a one sided range
(introduced in Swift 4 with SE-0172 One-sided Ranges):

extension String {
    func index(of aString: String, startingFrom position: Int = 0) -> String.Index? {
        let start = index(startIndex, offsetBy: position)
        return self[start...].range(of: aString, options: .literal)?.lowerBound
    }
}

This works because the substring self[start...] shares its indices
with the originating string self.

More Related Contents:

  1. Concatenate dictionary values in Swift
  2. BigInteger equivalent in Swift?
  3. What’s the difference between “as?”, “as!”, and “as”?
  4. The “++” and “–” operators have been deprecated Xcode 7.3
  5. How to print double quotes inside “”?
  6. Changing the Status Bar Color for specific ViewControllers using Swift in iOS8
  7. Swift extension example
  8. Swift function object wrapper in apple/swift
  9. Swift Alamofire: How to get the HTTP response status code
  10. UITextView with hyperlink text
  11. First item in a List is always selected
  12. How do I make my exponentiation operator work with all numeric types in Swift?
  13. How to create local scopes in Swift?
  14. Get terminal output after a command swift
  15. Assign value of a Firestore document to a variable
  16. Deletable Table with TextField on SwiftUI
  17. Generating random numbers with Swift
  18. Can you override between extensions in Swift or not? (Compiler seems confused!)
  19. How String Comparison happens in Swift
  20. In Swift 3, how to calculate the factorial when the result becomes too high? [duplicate]
  21. What is the reduce() function doing, in Swift
  22. How do I find the beginning of the week from an NSDate?
  23. Twitter Call back URL
  24. Determine if Any.Type is Optional
  25. How to get user home directory path (Users/”user name”) without knowing the username in Swift3
  26. Swift find all occurrences of a substring
  27. Core Data Predicate Filter By Today’s Date
  28. Swift compiler segmentation fault when building
  29. SwiftUI add inverted mask
  30. In Swift 4, how do I remove a block-based KVO observer?

Leave a Comment