linux下,grep中Perl风格正则表达式的一个疑惑

Question

2016/12/8

问题

man文档中有如下一段

 -P, --perl-regexp
              Interpret PATTERN as  a  Perl  regular  expression  (PCRE,  see  below).   This  is  highly
              experimental and grep -P may warn of unimplemented features.

highly experimental有什么丰富的内涵?

Answer 1

这个意思是实验性质的