forwarding declaration meaning in Chinese

发送声明书
发运声明书

In fact , during testing of the release of the cfront 1 . 0 language compiler from bell laboratories , there was a minor debate within a small circle of language lawyers as to whether or not a forward declaration and subsequent definition or any such combination had to consistently use the one or other keyword , or should they be allowed to be used interchangeably
实际上，在对贝尔实验室推出的cfront 1 . 0语言编译器版本进行测试的过程中，就前向声明和随后定义（或任何此类组合）是必须始终如一地使用一个或另一个关键字，还是应当允许交替使用它们，少数语法学家之间曾发生过一些争论。