56 lines
1.8 KiB
Swift
56 lines
1.8 KiB
Swift
import UIKit
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struct QLog {
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private init() {}
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static func m(_ message: String) { write("", message) }
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static func Info(_ message: String) { write("[INFO] ", message) }
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#if DEBUG
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static func Debug(_ message: String) { write("[DEBUG] ", message) }
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#else
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static func Debug(_ _: String) {}
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#endif
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static func Error(_ message: String) { write("[ERROR] ", message) }
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static func Warning(_ message: String) { write("[WARN] ", message) }
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private static func write(_ tag: String, _ message: String) {
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print(String(format: "%1.3f %@%@", Date().timeIntervalSince1970, tag, message))
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}
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}
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extension UIEdgeInsets {
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init(all: CGFloat = 0, top: CGFloat? = nil, left: CGFloat? = nil, bottom: CGFloat? = nil, right: CGFloat? = nil) {
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self.init(top: top ?? all, left: left ?? all, bottom: bottom ?? all, right: right ?? all)
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}
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}
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precedencegroup CompareAssignPrecedence {
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assignment: true
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associativity: left
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higherThan: ComparisonPrecedence
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}
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infix operator <-? : CompareAssignPrecedence
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infix operator <-/ : CompareAssignPrecedence
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extension Equatable {
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/// Assign a new value to `lhs` if `newValue` differs from the previous value. Return `false` if they are equal.
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/// - Returns: `true` if `lhs` was overwritten with another value
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static func <-?(lhs: inout Self, newValue: Self) -> Bool {
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if lhs != newValue {
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lhs = newValue
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return true
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}
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return false
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}
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/// Assign a new value to `lhs` if `newValue` differs from the previous value.
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/// Return tuple with both values. Or `nil` if they are equal.
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/// - Returns: `nil` if `previousValue == newValue`
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static func <-/(lhs: inout Self, newValue: Self) -> (previousValue: Self, newValue: Self)? {
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let previousValue = lhs
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if previousValue != newValue {
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lhs = newValue
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return (previousValue, newValue)
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}
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return nil
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}
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}
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