補足:Task localのところで出てきたasync letの例(「これなんだ？」とみんなでなったやつ)は、こう書いてありました。 which–if we desugar the syntax a little bit to what is actually happening in the async let initializer–is more correctly represented as: async let dinner = { cookDinner() } https://github.com/ktoso/swift-evolution/blob/wip-tasklocals/proposals/nnnn-task-locals.md#binding-values-for-the-duration-of-a-child-task (edited)

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language. - ktoso/swift-evolution