![Chris on Twitter: "Experiments with Copy-On-Write. I didn't realize before that array subscripts are a special case... will write this up for Advanced Swift. https://t.co/ozE2jHUlD4" / Twitter Chris on Twitter: "Experiments with Copy-On-Write. I didn't realize before that array subscripts are a special case... will write this up for Advanced Swift. https://t.co/ozE2jHUlD4" / Twitter](https://pbs.twimg.com/media/CsyJLXHWIAAFYwQ.jpg:large)
Chris on Twitter: "Experiments with Copy-On-Write. I didn't realize before that array subscripts are a special case... will write this up for Advanced Swift. https://t.co/ozE2jHUlD4" / Twitter
SR-11262] Array.subscript.read / Collection.subscript.read allocate · Issue #53663 · apple/swift · GitHub
![swift - Swift3 & Xcode8: 'subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, - Stack Overflow swift - Swift3 & Xcode8: 'subscript' is unavailable: cannot subscript String with a CountableClosedRange<Int>, - Stack Overflow](https://i.stack.imgur.com/yfjpl.png)