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#if canImport(Combine)

import Combine
import CasePaths

@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, *)
public typealias Effect<Output> = AnyPublisher<Output, Never>

@available(iOS 13.0, macOS 10.15, tvOS 13.0, watchOS 6.0, *)
extension Effect {

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import SwiftUI

struct BubbleFramesValue {
    var framesForKey: [AnyHashable: [CGRect]] = [:]
    var gradientFrame: CGRect? = nil
}

struct BubbleFramesKey { }

extension BubbleFramesKey: PreferenceKey {

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# Show the Xcode version number over the Dock icon.
defaults write com.apple.dt.Xcode DVTEnableDockIconVersionNumber -bool YES
# Or set ShowDVTDebugMenu.

# Show Index in the Report navigator.
# https://pspdfkit.com/blog/2019/how-xcode-indexing-works-and-how-to-solve-problems/
defaults write com.apple.dt.Xcode IDEIndexShowLog -bool YES

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    import SwiftUI
    import PlaygroundSupport

    struct EqualWidthKey: PreferenceKey {
        static var defaultValue: CGFloat? { nil }

        static func reduce(value: inout CGFloat?, nextValue: () -> CGFloat?) {
            switch (value, nextValue()) {
            case (_, nil): break
            case (nil, let next): value = next

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// See https://stackoverflow.com/q/59367202/77567

import Combine
import Foundation

extension Publisher {
    func step(with stepper: @escaping (SteppingSubscriber<Output, Failure>.Event) -> ()) -> AnyCancellable {
        let subscriber = SteppingSubscriber<Output, Failure>(stepper: stepper)
        self.subscribe(subscriber)
        return .init(subscriber)

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#!/usr/bin/xcrun swift

// http://alastairs-place.net/blog/2012/06/06/utis-are-better-than-you-think-and-heres-why/

extension String {
    static let bitsForCodeUnit: [Character: [UInt8]] = {
        var dict = [Character: [UInt8]]()
        for (i, ch) in "abcdefghkmnpqrstuvwxyz0123456789".enumerated() {
            let bits = Array((0 ..< 5).map({ UInt8((i >> $0) & 1) }).reversed())
            dict[ch] = bits

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class MyObject { }

var o = MyObject()
print("strong o = \(o)")

unowned let u = o
print("unowned u = \(u)")

o = MyObject()

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@import AppKit;
@import ImageIO;
@import CoreServices;

#define fromCF (__bridge id)
#define toCF (__bridge CFTypeRef)

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        CGRect rect = CGRectMake(0, 0, 100, 100);

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    import UIKit
    import PlaygroundSupport

    typealias Radians = CGFloat

    extension UIBezierPath {

        static func simonWedge(innerRadius: CGFloat, outerRadius: CGFloat, centerAngle: Radians, gap: CGFloat) -> UIBezierPath {
            let innerAngle: Radians = CGFloat.pi / 4 - gap / (2 * innerRadius)
            let outerAngle: Radians = CGFloat.pi / 4 - gap / (2 * outerRadius)

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# Decimal / NSDecimal support for lldb
#
# Put this file somewhere, e.g. ~/.../lldb/Decimal.py
# Then add this line to ~/.lldbinit:
#     command script import ~/.../lldb/Decimal.py

import lldb

def stringForDecimal(sbValue, internal_dict):
    from decimal import Decimal, getcontext