转换 tex 源，以便所有宏都被其定义替换
是否可以看到 TeX“预处理器”的输出，即？ e.实际输出完成之前的中间步骤，但所有用户定义的宏都被替换，只留下 TeX 原语的子集？
或者说没有这样的中间步骤？
Is it possible to see the output of the TeX ‘pre-processor’, i. e. the intermediate step before the actual output is done but with all user-defined macros replaced and only a subset of TeX primitives left?
Or is there no such intermediate step?
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Write
然后用于在日志文件中输出
或在文档中输出
Write
And then for output in the log-file
or for output in your document
TeX 中没有“预处理器”。任何阶段任何控制序列的替换文本都可能有所不同（这用于很多事情！）。例如，
将首先以一种方式定义 \demo，然后更改它。以同样的方式，您可以重定向 TeX 原语。例如，LaTeX 内核将 \input 移动到内部位置并更改它。简化版本：
There is no "pre-processor" in TeX. The replacement text for any control sequence at any stage can vary (this is used for a lot of things!). For example
will first define \demo in one way and then change it. In the same way, you can redirect TeX primitives. For example, the LaTeX kernel moves \input to an internal position and alters it. A simplified version:
尝试选择性宏扩展器。
Try the Selective Macro Expander.
TeX 内置了很多差异跟踪工具，包括跟踪宏扩展。这仅在实际扩展时跟踪实时宏，但它仍然非常有用。完整详细信息请参阅 The TeXbook 以及其他地方。
当我尝试调试宏问题时，我通常只使用大锤子：
然后我在输出或 .log 文件中挖掘我想知道的内容。
TeX has a lot of difference tracing tools built in, including tracing macro expansion. This only traces live macros as they are actually expanded, but it's still quite useful. Full details in The TeXbook and probably elsewhere.
When I'm trying to debug a macro problem I generally just use the big hammer:
then I dig in the output or the .log file for what I want to know.
在 tex.SE 的这个问题上有很多关于这个问题的讨论，并且这个问题。但我会借此机会指出，最好的答案 (IMO) 是使用 de-macro 程序，它是 TeXLive 附带的 python 脚本。它的功能非常强大，可以处理参数以及简单的替换。
要使用它，请将要扩展的宏移动到
-private.sty \usepackage{-private 将其包含到文档中} ，然后运行de-macro。它会输出-clean.tex There's a lot of discussion of this issue on this question at tex.SE, and this question. But I'll take the opportunity to note that the best answer (IMO) is to use the
de-macroprogram, which is a python script that comes with TeXLive. It's quite capable, and can handle arguments as well as simple replacements.To use it, you move the macros that you want expanded into a
<something>-private.styfile, and include it into your document with\usepackage{<something>-private}, then runde-macro <mydocument>. It spits out<mydocument>-clean.tex, which is the same as your original, but with your private macros replaced by their more basic things.