SwiftはScalaに似てる、SwiftはScalaに似てるってずっと感じてたので大きく勘違いしていた。SwiftでTrailing Closureを書きたい場合はCurry化した関数を書く必要はないらしい。 Curried Function in Swift そもそもSwiftにはCurry化した関数を書くことができることを先に知ったのが発端。 func incrementBy(add: Int)(value: Int)-> Int { return add + value } let f = incrementBy(3) f(value: 3) 引数を丸括弧で分けていくことで部分適用された関数を書くことができる。 Curried Function in Scala ScalaではこのCurry化を使ってTrailing ClosureみたいなDSLを書く
![Trailing Closures and Curried function - Qiita](https://cdn-ak-scissors.b.st-hatena.com/image/square/8cdc3076d94a47d6c4500625447b93e833f45720/height=288;version=1;width=512/https%3A%2F%2Fqiita-user-contents.imgix.net%2Fhttps%253A%252F%252Fcdn.qiita.com%252Fassets%252Fpublic%252Farticle-ogp-background-412672c5f0600ab9a64263b751f1bc81.png%3Fixlib%3Drb-4.0.0%26w%3D1200%26mark64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZ3PTk3MiZoPTM3OCZ0eHQ9VHJhaWxpbmclMjBDbG9zdXJlcyUyMGFuZCUyMEN1cnJpZWQlMjBmdW5jdGlvbiZ0eHQtYWxpZ249bGVmdCUyQ3RvcCZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTU2JnM9YmEzNTI3ZDE0MWUxMzA0MmMyODExYTg5MGIxYjk1ZTM%26mark-x%3D142%26mark-y%3D57%26blend64%3DaHR0cHM6Ly9xaWl0YS11c2VyLWNvbnRlbnRzLmltZ2l4Lm5ldC9-dGV4dD9peGxpYj1yYi00LjAuMCZoPTc2Jnc9NzcwJnR4dD0lNDBMZXd1YXRoZSZ0eHQtY29sb3I9JTIzMjEyMTIxJnR4dC1mb250PUhpcmFnaW5vJTIwU2FucyUyMFc2JnR4dC1zaXplPTM2JnR4dC1hbGlnbj1sZWZ0JTJDdG9wJnM9YmEzMjI0YWZiZWM0MjJjZTljODA4YTVjMTkyODZjZjM%26blend-x%3D142%26blend-y%3D436%26blend-mode%3Dnormal%26txt64%3DaW4g44OI44Os44K444Oj44O844OH44O844K_5qCq5byP5Lya56S-%26txt-width%3D770%26txt-clip%3Dend%252Cellipsis%26txt-color%3D%2523212121%26txt-font%3DHiragino%2520Sans%2520W6%26txt-size%3D36%26txt-x%3D156%26txt-y%3D536%26s%3D4032b574e915f642ecdb872ee4ca61fb)