摘要：
New operators are declared at a global level using the operator keyword, and are marked with the prefix, infix or postfix modifiers: prefix operator + 阅读全文
摘要：
precedencegroup ChainingPrecedence { associativity: left higherThan: TernaryPrecedence } infix operator >>- : ChainingPrecedence 重点在这： postfix operato 阅读全文