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@ole
ole / swift-has-feature.sh
Last active September 10, 2024 00:51
swift-list-feature: List Swift compiler upcoming and experimental feature flags. ★ swift-has-feature: Check if a given compiler knows a specific feature flag, and whether it's an upcoming or experimental flag.
#!/bin/zsh
# Test if the Swift compiler knows about a particular language feature.
#
# Usage:
#
# swift-has-feature [--swift SWIFT_PATH] [--language-version LANGUAGE_VERSION] FEATURE
#
# The feature should be an upcoming or experimental language feature,
# such as `"StrictConcurrency"` or `"ExistentialAny"`.
@huwr
huwr / Publisher+shareReplayOnce.swift
Created August 26, 2021 04:51
Combine Publisher share replace once
public extension Publisher {
/// A variation on [share()](https://developer.apple.com/documentation/combine/publisher/3204754-share)
/// that allows for buffering and replaying a single event to future subscribers.
///
/// - Parameter initialValue: The initial value of the buffer, if none has been emitted before.
/// - Returns: A publisher that replays the event to future subscribers.
func shareReplayOnce(initialValue: Output) -> Publishers.Autoconnect<Publishers.Multicast<Self, CurrentValueSubject<Output, Failure>>> {
multicast { CurrentValueSubject(initialValue) }
.autoconnect()
@ollieatkinson
ollieatkinson / SVG.swift
Last active September 19, 2024 17:11
Utilise the private CoreSVG framework in Swift
import Darwin
import Foundation
import UIKit
// https://github.com/xybp888/iOS-SDKs/blob/master/iPhoneOS17.1.sdk/System/Library/PrivateFrameworks/CoreSVG.framework/CoreSVG.tbd
// https://developer.limneos.net/index.php?ios=17.1&framework=UIKitCore.framework&header=UIImage.h
@objc
class CGSVGDocument: NSObject { }