option_set.swift

// REQUIRES: swift_swift_parser, executable_test

// RUN: %target-run-simple-swift(-Xfrontend -plugin-path -Xfrontend %swift-plugin-dir -emit-tbd -emit-tbd-path %t.tbd)

import Swift

@attached(member, names:named(RawValue),named(rawValue),named(`init`), arbitrary)
@attached(extension, conformances: OptionSet)
public macro OptionSet<RawType>()=
 #externalMacro(module:"SwiftMacros", type:"OptionSetMacro")

@OptionSet<UInt8>
structShippingOptions{
privateenumOptions:Int{
case nextDay
case secondDay
case priority
case standard
}

staticletexpress:ShippingOptions=[.nextDay,.secondDay]
staticletall:ShippingOptions=[.express,.priority,.standard]
}

letoptions=ShippingOptions.express
assert(options.contains(.nextDay))
assert(options.contains(.secondDay))
assert(!options.contains(.standard))