如何使用搜索/替换在vim中访问正则表达式匹配？

Sample:

function foobar($arg1 = null, $arg2 = null) {
    $_a = $arg1;
    $_b = $arg2;
}

I want to write a search and replace regex in vim that does this:

我想写一个搜索并在vim中替换正则表达式:

function foobar($arg1 = null, $arg2 = null) {
   $_a = (!$arg1) ? $arg1 : 1;
   $_b = (!$arg2) ? $arg2 : 1;
 }

This is what I've tried so far:

这是我到目前为止所尝试的:

Using the . command to repeat my last action in vim, but it only appends : 1; to the lines

使用。命令重复我在vim中的最后一个动作,但它只追加:1;到了线

I've written dozens of variations of this regex, but can't get it to work as expected: %s/\$_a\t=\t*/(!\$arg1)\t\?\t\2\t\:\t1/g

我已经写了这个正则表达式的几十种变体,但无法按预期工作:%s / \ $ _ a \ t = \ t * / /(!\ $ arg1)\ t \?\ t \ 2 \吨\:\ T1 /克

Replace the lines manually, but it goes without saying that I've to do this over huge number of files.

手动替换行,但不言而喻,我必须在大量文件上执行此操作。

Basically what I want to do is to write a regex that matches $arg1 and then enclose the match with the ternary operator, but I haven't been able to access the regex matches in vim.

基本上我想要做的是编写一个匹配$ arg1的正则表达式然后将匹配与三元运算符括起来,但是我无法访问vim中的正则表达式匹配。

Any help will be greatly appreciated!

任何帮助将不胜感激!

(it doesn't have to be done in vim, I'm open to suggestions like using perl)

(它不必在vim中完成,我对使用perl这样的建议持开放态度)

Thanks!!

1 个解决方案

#1

Try following command:

尝试以下命令:

:%s/\(\$arg[0-9]\);/(!\1) ? \1 : 1;

Above command replace $arg1; with (!$arg1) ? $arg1 : 1;

以上命令替换$ arg1;用(!$ arg1)? $ arg1:1;

#1