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                類可以 [實現(第2.3.3節)](http://#) Dynamic 類型,和提供任意字段訪問的 Dynamic<T> 。前一種情況,字段可以有任何類型,而后一種,它們被限制兼容參數類型: ~~~ class ImplementsDynamic implements Dynamic<String> { public var present:Int; public function new() {} } class Main { static public function main() { var c = new ImplementsDynamic(); // 有效的,present 是一個存在的字段 c.present = 1; // 有效,分配的值是一個 String c.stringField = "foo"; // 錯誤,Int應該是 String //c.intField = 1; } } ~~~ 實現 Dynamic 不符合實現其它接口的需求。預期的字段仍然必須被明確實現。實現 Dynamic 的類(帶或者不帶類型參數)也可以利用一個特別的方法名字叫做 `resolve` 。如果一個[ 讀訪問(第4.2節)](http://#) 被做出,而且被討論的字段不存在,`resolve` 方法被調用,并以這個字段的名字作為參數: ~~~ class Resolve implements Dynamic<String> { public var present:Int; public function new() {} function resolve(field:String) { return "Tried to resolve " +field; } } class Main { static public function main() { var c = new Resolve(); c.present = 2; trace(c.present); trace(c.resolveMe); } } ~~~
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