LZ SwiftUI Macros

A collection of Swift macros for working with SwiftUI.

Sadly, the only one here doesn’t work, because Swift macros are not powerful enough.

FocusedCommand

To ease the burden of implementing focused commands, as described in this article, I had hoped these macros would help:

#FocusedCommand("Duplicate")

would expand to

struct DuplicateCommandKey : FocusedValueKey {
    typealias Value = (Bool, () -> Void)
}
extension FocusedValues {
    var duplicateCommand : DuplicateCommandKey.Value? {
        get {
            self [DuplicateCommandKey.self]
        }
        set {
            self [DuplicateCommandKey.self] = newValue
        }
    }
}
extension View {
    func onDuplicate(disabled: Bool = false, perform: @escaping () -> ()) -> some View {
        self.focusedSceneValue(\.duplicateCommand, (disabled, perform))
    }
}

But alas, it is not allowed to introduce extensions. So I guess we’re all stuck with tons of annoying boilerplate.