The following piece of code works just fine with Perl (v5.16.2). However, when I run it using Perl v5.8.9, it complains about the following regex. How can I rewrite this regex in a way that works with Perl v5.8.9. (I can't update the version).The following piece of code works just fine wit
阅读背景：
为旧的Perl版本重写递归正则表达式
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