A hand-curated list of Swift macros. Feel free to contribute!
// "Stringify" macro turns the expression into a string.
#stringify(x + y)
// "AddBlocker" complains about addition operations. We emit a warning
// so it doesn't block compilation.
#addBlocker(x * y + z)
// "#URL" macro provides compile time checked URL construction. If the URL is
// malformed an error is emitted. Otherwise a non-optional URL is expanded.
#URL("https://swift.org/")#powerAssert(max(a, b) == c)
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false- Preview macro (Xcode 15+)
#Preview {
Button("SwiftUI") {}
}import SFSymbolsMacro
import SwiftUI
@SFSymbol
enum Symbols: String { ... }