There are several macro systems for scheme , but Scheme有几个宏系统,但是
Therefore , most schemes also include a non - hygienic macro system called 因此,大部分模式还包含一个非hygienic的宏系统,通常称为
Discussed how the scheme macro system allows an easy mixing of macro and non - macro code 就讨论了scheme宏系统如何简单地混合使用宏代码和非宏代码。
The two most widely used textual macro systems are the c preprocessor and the m4 macro processor 两个最广泛使用的文本宏系统是c预处理器和m4宏处理器。
As you can see , scheme s hygienic macros can bring you the benefits of other macro systems without many of their pitfalls 正如您可以看到的一样, scheme的宏可以提供其他宏系统的优点,却没有那些系统的问题。