如何在通用Lisp中重新实现反引号? [英] how can i reimplement backquote in common lisp?

问题描述

我必须重新制作反引号(使用unquote和unquote-splicing)，而不使用内置的读取器宏`，@ 预期的行为是:

I have to remake backquote (with unquote and unquote-splicing) without using the builtins reader macros `,@ The behaviour expected is:

> (BACKQUOTE (A B (LIST ‘C ‘D) (COMA (LIST ‘E ‘F)
                               (COMA-AT (LIST ‘G ‘H)))
(A B (LIST ‘C ‘D) (E F) G H)

我尝试使用宏执行此操作，但结果出乎意料.

I try to do it with a macro but the results are no the expected.

非常感谢！!!!

有什么提示可以做什么?

Any hints of what could be done?

推荐答案

http: //lib.store.yahoo.net/lib/paulgraham/glsbq.lisp 有一个例子

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