Swift 3.0 发布，开源后首个主要发行版本
欢迎加入运维网交流群：263444886Swift 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
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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/
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