如何使用regexp匹配TCL中的括号 [英] how to use regexp to match a parentheses in TCL

问题描述

我对使用regexp匹配TCL中的括号有疑问.

I have a question about using regexp to match a parentheses in TCL.

例如，我有一个像这样的字符串:

For example I have a string like this:

yes, it is (true, and it is fine).

我只想匹配这部分yes, it is (true，如何匹配?

I just want to match this part yes, it is (true, how to match it?

推荐答案

您可以按照@bobah的建议，将字符括号括在字符类中，

You can enclose parentheses in a character class as @bobah suggests,

yes, it is [(]true

但是更常见的是逃脱它:

But it's more common to escape it:

yes, it is \(true

但是，如果要转义，请确保您知道必须执行以下操作:

But if you're escaping it, make sure you understand that you must either do this:

regexp -- "yes, it is \\(true" $subject

或者这个:

regexp -- {yes, it is \(true} $subject

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