beccadax

"Raw" mode string literals

• Proposal: SE-0200
• Author: John Holdsworth, Brent Royal-Gordon, Erica Sadun
• Review Manager: Doug Gregor
• Status: Returned for revision
• Implementation: apple/swift#13055
• Bugs: SR-6362 Needs Update for New Design

Introduction

beccadax

print("""
        <?xml version="1.0"?>
        <catalog>
        \(bookTuples.map(xmlForBookTuple).joined(separator: "")
        )</catalog>
        """)

typealias ChapterTuple = (heading: String)
typealias BookTuple = (id: String, author: String, title: String, genre: String, price: String, chapters: [ChapterTuple])
                

beccadax

// Evaluates the given closure when two `Optional` instances are not `nil`,
// passing the unwrapped values as parameters. (Thanks, Mike Ash, Tim Vermeulen)
// Following the example of IEEE754 with NAN, any comparison involving
// .None is false 
//
// See also: http://stackoverflow.com/questions/1565164/what-is-the-rationale-for-all-comparisons-returning-false-for-ieee754-nan-values

/// Returns nil if either parameter is nil, or a tuple of the parameters
/// otherwise.
func all<T, U>(_ first: T?, _ second: U?) -> (T, U)? {

beccadax

Tuple-Based Compound Optional Binding

• Proposal: TBD
• Author: Brent Royal-Gordon
• Status: TBD
• Review manager: TBD

Introduction

This proposal enhances optional binding with a new, tuple-based syntax for

beccadax

Introducing with to the Standard Library

• Proposal: TBD
• Author: Erica Sadun, Brent Royal-Gordon
• Status: TBD
• Review manager: TBD

Introduction

This proposal introduces a with function to the standard library. This function

beccadax

public struct Distance :NumericType {
    public var value :Double
    public init(_ value: Double) {
        self.value = value
    }
}

extension Distance :IntegerLiteralConvertible {
    public init(integerLiteral: IntegerLiteralType) {
        self.init(Double(integerLiteral))

beccadax

extension String {
    func split(separator:String) -> [String] {
        return self.componentsSeparatedByString(separator)
    }
}
 
extension Array {
    func unpack() -> (T)? {
        return count == 1 ? (self[0]) : nil
    }