Swift 3.0 发布，开源后首个主要发行版本

中国网络水泥

欢迎加入运维网交流群：263444886  
                　　Swift 3.0 是 Swift 宣布开源后的首页主要发行版本，包含众多关于核心语言以及标准库的主要改进和优化，同时包含 Swift 在 Linux 上移植的版本，以及官方首个 Swift Package Manager 版本。
　　Swift 3.0 是一个主要语言发行版本，在源码上与 Swift 2.2 和 2.3 并不兼容，包含了如下的语言特性的变化：

• 　　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-0025: Scoped Access Level
  
• 　　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>
  
• 　　SE-0035: Limiting inout capture to @noescape contexts
  
• 　　SE-0036: Requiring Leading Dot Prefixes for Enum Instance Member Implementations
  
• 　　SE-0037: Clarify interaction between comments & operators
  
• 　　SE-0038: Package Manager C Language Target Support
  
• 　　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-0052: Change IteratorType post-nil guarantee
  
• 　　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-0060: Enforcing order of defaulted parameters
  
• 　　SE-0061: Add Generic Result and Error Handling to autoreleasepool()
  
• 　　SE-0062: Referencing Objective-C key-paths
  
• 　　SE-0063: SwiftPM System Module Search 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-0067: Enhanced Floating Point Protocols
  
• 　　SE-0069: Mutability and Foundation Value Types
  
• 　　SE-0070: Make Optional Requirements Objective-C-only
  
• 　　SE-0071: Allow (most) keywords in member references
  
• 　　SE-0072: Fully eliminate implicit bridging conversions from Swift
  
• 　　SE-0076: Add overrides taking an UnsafePointer source to non-destructive copying methods on UnsafeMutablePointer
  
• 　　SE-0077: Improved operator declarations
  
• 　　SE-0081: Move where clause to end of declaration
  
• 　　SE-0085: Package Manager Command Names
  
• 　　SE-0086: Drop NS Prefix in Swift Foundation
  
• 　　SE-0088: Modernize libdispatch for Swift 3 naming conventions
  
• 　　SE-0089: Renaming String.init(_: T)
  
• 　　SE-0091: Improving operator requirements in protocols
  
• 　　SE-0092: Typealiases in protocols and protocol extensions
  
• 　　SE-0093: Adding a public base property to slices
  
• 　　SE-0094: Add sequence(first:next:) and sequence(state:next:) to the stdlib
  
• 　　SE-0095: Replace protocol syntax with P1 & P2 syntax
  
• 　　SE-0096: Converting dynamicType from a property to an operator
  
• 　　SE-0099: Restructuring Condition Clauses
  
• 　　SE-0101: Reconfiguring sizeof and>MemoryLayoutstruct
  
• 　　SE-0102: Remove @noreturn attribute and introduce an empty Never type
  
• 　　SE-0103: Make non-escaping closures the default
  
• 　　SE-0106: Add a macOS Alias for the OSX Platform Configuration Test
  
• 　　SE-0107: UnsafeRawPointer API
  
• 　　SE-0109: Remove the Boolean protocol
  
• 　　SE-0111: Remove type system significance of function argument labels
  
• 　　SE-0112: Improved NSError Bridging
  
• 　　SE-0113: Add integral rounding functions to FloatingPoint
  
• 　　SE-0114: Updating Buffer "Value" Names to "Header" Names
  
• 　　SE-0115: Rename Literal Syntax Protocols
  
• 　　SE-0116: Import Objective-C id as Swift Any type
  
• 　　SE-0117: Allow distinguishing between public access and public overridability
  
• 　　SE-0118: Closure Parameter Names and Labels
  
• 　　SE-0120: Revise partition Method Signature
  
• 　　SE-0121: Remove Optional Comparison Operators
  
• 　　SE-0124: Int.init(ObjectIdentifier) and UInt.init(ObjectIdentifier)should have a bitPattern: label
  
• 　　SE-0125: Remove NonObjectiveCBase and isUniquelyReferenced
  
• 　　SE-0127: Cleaning up stdlib Pointer and Buffer Routines
  
• 　　SE-0128: Change failable UnicodeScalar initializers to failable
  
• 　　SE-0129: Package Manager Test Naming Conventions
  
• 　　SE-0130: Replace repeating Character and UnicodeScalar forms of String.init
  
• 　　SE-0131: Add AnyHashable to the standard library
  
• 　　SE-0133: Rename flatten() to joined()
  
• 　　SE-0134: Rename two UTF8-related properties on String
  
• 　　SE-0135: Package Manager Support for Differentiating Packages by Swift version
  
• 　　SE-0136: Memory Layout of Values
  
• 　　SE-0137: Avoiding Lock-In to Legacy Protocol Designs
  

　　官方发行说明：https://swift.org/blog/swift-3-0-released/