正则表达式 - 角色类中的括号和括号 [英] regex - brackets and parenthesis in character-class

问题描述

我想在正则表达式的字符类中匹配这些字符：[]（），我该怎么做？

I would like to match these characters: [ ] ( ) in a character class in a regex, how can I do that?

echo 'some text (some text in parenthesis) [some other in brackets]' | grep '[\[\]\(\)]'

t $匹配任何字符。

This one doesn't match any character.

推荐答案

您可以像这样使用它：

You can use it like this:

echo 'some text (some text in paranthesis) [some other in brackets]' | grep -o '[][()]'

(
)
[
]

您不需要转义（和）在角色类中。此外，如果在打开 []后立即将] 和 [那么你也不需要逃避它们。

You don't need to escape ( and ) inside a character class. Moreover if you place ] and [ right after opening [ then you don't need to escape them either.

这篇关于正则表达式 - 角色类中的括号和括号的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！