The only real requirement, in fact, is that the language in question actually be installed; for C this means that the compiler used to create the Perl installation is still available. 唯一的真正要求是,所需的语言确实被完全安装了。在C语言下,这意味着用来创建Perl安装的编译器还能够使用。
For Java they first attempted to optimistically analyze debug mode byte code, thereby removing the requirement for writing a compiler. 对于Java,他们起初很乐观的打算分析调试模式下的字节代码,因此不需要再写一个编译器。