2020年11月20日

vim 正则表达式非贪婪匹配

问题

vim 中不能使用 .*?。

解法

可使用 .\{-},代替 .*,实现非贪婪匹配。

详细说明

输入 :help non-greedy,可以看到如下帮助文档:

non-greedy
        If a "-" appears immediately after the "{", then a shortest match
        first algorithm is used (see example below).  In particular, "\{-}" is                                                                                       
        the same as "*" but uses the shortest match first algorithm.  BUT: A
        match that starts earlier is preferred over a shorter match: "a\{-}b"
        matches "aaab" in "xaaab".                                     
                                                                       
        Example                 matches                                
        ab\{2,3}c               "abbc" or "abbbc"                      
        a\{5}                   "aaaaa"                                
        ab\{2,}c                "abbc", "abbbc", "abbbbc", etc.        
        ab\{,3}c                "ac", "abc", "abbc" or "abbbc"         
        a[bc]\{3}d              "abbbd", "abbcd", "acbcd", "acccd", etc.
        a\(bc\)\{1,2}d          "abcd" or "abcbcd"                     
        a[bc]\{-}[cd]           "abc" in "abcd"                        
        a[bc]*[cd]              "abcd" in "abcd"                       
                                                                       
        The } may optionally be preceded with a backslash: \{n,m\}.

注意:实测,/\v 开头进行查找时,无法使用非贪婪模式。应该只使用 /。

 

参考链接:

https://stackoverflow.com/questions/1305853/how-can-i-make-my-match-non-greedy-in-vim

You may also like...

发表评论

电子邮件地址不会被公开。 必填项已用*标注


*