如何在期望脚本的切换情况下使用正则表达式? [英] how to use regex in switch case in expect script?

问题描述

通常，在 expect 中切换大小写如下:

Normally, switch case in expect looks like this:

switch -- $count \
1 {
set type byte
} 2 {
set type word
} big {
set type array
} default {
puts "$count is not a valid type"
} 

我需要使用|等正则表达式运算符或&-我该怎么做?

I need to use regex operators such as | or & - how can I do that?

以下示例不适用于期望代码:

The below example does not work with expect code :

switch -- $variable \
("a"|"b"|"c") {
              do something
}

("a" |"b" |"c")表示a或b或c，但似乎不起作用.

("a"|"b"|"c") represents a or b or c, but it does not seem to work.

如何在switch中使用此类语句，或者可能是and语句?

How do I use such statements in switch or may be an and statement?

推荐答案

对命令使用 -regexp 选项，并以Tcl方式将表达式括起来.另外，您可以在所有开关周围使用花括号，这样就不必使用换行符了.

Use the -regexp option for the command, and brace the expression the Tcl way. Also, you can use braces around all the switches so you don't have to use line continuations.

switch -regexp -- $variable {
    {a|b|c} {
        do something
    }
    {^[def].*(?:g|h|i)} {
        do a different thing
    }
    default {
        do something else
    }
}

http://tcl.tk/man/tcl8.5/TclCmd/switch.htm
http://tcl.tk/man/tcl8.5/TclCmd/re_syntax.htm

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