如何描述本地函数（trace）？ [英] How do I describe a local function to (trace)?

问题描述

在通用的lisp中，函数（跟踪名称）可用于查看有关对函数的调用的输出。

In common lisp, the function (trace name) can be used to see output about the calls to a function.

如果我的函数以本地作用域声明，如何描述它要跟踪？

If my function is declared with local scope, how do I describe it to trace?

例如，如何跟踪吧，如下：

eg, how do I trace bar, below:

(defun foo (x)  
  (labels ((bar (y) (format t "bar: ~a~&" y)))  
    (bar x)))  

推荐答案

使用 （TRACE ...）未由ANSI Common Lisp定义。

Tracing local functions with (TRACE ...) is not defined by ANSI Common Lisp.

某些实现具有扩展功能。请参阅 CMU CL 。

Some implementations have extensions to do that. See for example CMU CL.

除此之外，您需要在FOO的定义中添加一些代码。例如，有一个宏可能是有用的，以便您可以将调用写入（bar-it（bar x）），并将宏扩展为打印输入和退出的代码。

Other than that, you would need add some code to the definition of FOO. For example it might be useful to have a macro so that you can write the call to bar as (trace-it (bar x)) and the macro would expand into code that prints the entry and exit.

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