Apple Releases Swift 3.0 Preview 1 for iOS and Ubuntu Developers

Apple is offering a developer preview of version 3.0 of its Swift programming language, used for iOS and MacOS development and also available for Ubuntu Linux. Swift 3 features better translation of Objective-C APIs into Swift, modernization of debugging identifiers and playground literals, and a new model for collections and indices.

Implemented Swift Evolution Proposals

The following Swift Evolution proposals are newly implemented in Swift 3.0 Preview 1:

• SE-0002: Removing currying func declaration syntax
• SE-0003: Removing var from Function Parameters
• SE-0004: Remove the ++ and -- operators
• SE-0005: Better Translation of Objective-C APIs Into Swift
• SE-0006: Apply API Guidelines to the Standard Library
• SE-0007: Remove C-style for-loops with conditions and incrementers
• SE-0008: Add a Lazy flatMap for Sequences of Optionals
• SE-0016: Adding initializers to Int and UInt to convert from UnsafePointer and UnsafeMutablePointer
• SE-0017: Change Unmanaged to use UnsafePointer
• SE-0019: Swift Testing
• SE-0023: API Design Guidelines
• SE-0028: Modernizing Swift’s Debugging Identifiers (__FILE__, etc)
• SE-0029: Remove implicit tuple splat behavior from function applications
• SE-0031: Adjusting inout Declarations for Type Decoration
• SE-0032: Add first(where:) method to SequenceType
• SE-0033: Import Objective-C Constants as Swift Types
• SE-0034: Disambiguating Line Control Statements from Debugging Identifiers
• SE-0037: Clarify interaction between comments & operators
• SE-0039: Modernizing Playground Literals
• SE-0040: Replacing Equal Signs with Colons For Attribute Arguments
• SE-0043: Declare variables in ‘case’ labels with multiple patterns
• SE-0044: Import as Member
• SE-0046: Establish consistent label behavior across all parameters including first labels
• SE-0047: Defaulting non-Void functions so they warn on unused results
• SE-0048: Generic Type Aliases
• SE-0049: Move @noescape and @autoclosure to be type attributes
• SE-0053: Remove explicit use of let from Function Parameters
• SE-0054: Abolish ImplicitlyUnwrappedOptional type
• SE-0055: Make unsafe pointer nullability explicit using Optional
• SE-0057: Importing Objective-C Lightweight Generics
• SE-0059: Update API Naming Guidelines and Rewrite Set APIs Accordingly
• SE-0061: Add Generic Result and Error Handling to autoreleasepool()
• SE-0062: Referencing Objective-C key-paths
• SE-0064: Referencing the Objective-C selector of property getters and setters
• SE-0065: A New Model For Collections and Indices
• SE-0066: Standardize function type argument syntax to require parentheses
• SE-0069: Mutability and Foundation Value Types
• SE-0070: Make Optional Requirements Objective-C-only
• SE-0071: Allow (most) keywords in member references
• SE-0085: Package Manager Command Names
• SE-0094: Add sequence(first:next:) and sequence(state:next:) to the stdlib

Downloads

Apple (Xcode)

Swift 3.0 Preview 1 is available for free as part of Xcode 8 beta 1.

Linux (Ubuntu 14.04 and Ubuntu 15.10)

Official binaries for Ubuntu 14.04 and Ubuntu 15.10 are available for download on Swift.org.