@swift-5.8.1
let str = "abc" str.withCString { print(String(format: "%8s", $0)) } print(String(format: "%8@", str))let str = "abc" str.withCString { print(String(format: "%8s", $0)) } print(String(format: "%8@", str))%s なら幅指定子が使えるのに %@ だと使えない・・・