GNU M4:定义一个匹配文本的规则，并对匹配的文本进行操作? [英] GNU M4: Define a rule that matches text, and operates on that matched text?

问题描述

假设我有:

File:

[x]

我想定义m4宏:

define(`\[.*\]`, ...)

问题:这有可能吗?怎么做到的?

Question: Is this possible and how does one do it?

推荐答案

在

3.1宏名称

3.1 Macro names

名称是字母，数字和字符"_"的任意序列 (下划线)，其中第一个字符不是数字. m4将使用 在输入中找到的最长此类序列.如果名称包含宏 定义，将对其进行宏扩展(请参见宏).名字 区分大小写.

A name is any sequence of letters, digits, and the character ‘_’ (underscore), where the first character is not a digit. m4 will use the longest such sequence found in the input. If a name has a macro definition, it will be subject to macro expansion (see Macros). Names are case-sensitive.

合法名称的示例为:"foo"，"_ tmp"和"name01".

Examples of legal names are: ‘foo’, ‘_tmp’, and ‘name01’.

[和]字符在宏定义中不合法.

The [ and ] characters aren't legal in macro definition.

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