What's new in Swift 5.0

1. youhsuan 2019.6.20
What’s new in Swift 5.0

2. Outline
• [SE-0192] Handling Future Enum Class
• [SE-0200] Enhancing String Literals Delimiters to Support Raw Text
• [SE-0230] Flatten nested optionals resulting from `try?`
• [SR-149] Property observers not triggered on other instances of same class

3. • [SE-0192] Handling Future Enum Class
● Introduction
● Forzen v.s. Non-forzen enum
● Only affects for C enum and standard library enums
● Nothing changes for user-defined Swift enums
● @unknown naming
● @unknown default (demo)
● User defined “default”

4. [SE-0200] Enhancing String Literals Delimiters to Support Raw Text
● Delimiters # (pound, Number Sign)
● ( ) -> #( )
● n -> #n
● Customized Escape Delimiters
● Regular expressions
●

5. [SE-0230] Flatten nested optionals resulting from ‘try?’
● Motivative

6. [SR-149] Property observers not triggered on other instances of same class