删除多行C样式/ *注释* /使用Perl regex [英] Remove multi-line C style /* comments */ using Perl regex

问题描述

如何删除多行C样式的注释：

How do I remove multi-line C style comments like:

/* comments
   comments
   comments
   comments */

我可以删除一行中的注释，如<$

I am able to remove comments in one line like /* comments */ by using several codes provided in other questions.

s#/\*[\s\S]*?\*/##sg;
s#/\*(.*?)\*/##sg;
s#/\*[^*]*\*+([^/*][^*]*\*+)*/|("(\\.|[^"\\])*"|'(\\.|[^'\\])*'|.[^/"'\\]*)#defined $2 ? $2 : ""#gse

上面的三个正则表达式不适用于多行注释。如何处理？

All three regexes above do not work with multi-line comments. How can they be handled?

推荐答案

我会这样做，

perl -0777pe 's/\/\*(?:(?!\*\/).)*\*\/\n?//sg' file

示例：

$ cat fi
/* comments
   comments
   comments
   comments */
bar
$ perl -0777pe 's/\/\*(?:(?!\*\/).)*\*\/\n?//sg' fi
bar

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