未转义的左括号正则表达式错误 [英] Unescaped left brace regex error

问题描述

我不是正则表达式方面的专家，无法弄清楚我应该在这里更改什么.

I’m not an expert in regex and can't figure what I am supposed to change here.

我收到这两个错误

regex 中未转义的左大括号已弃用，在 regex 中传递；在 m/^(.*?)(\\)?\${ <-- HERE ([^{}]+)}(.*)$/ 在/usr/share/perl5/Debconf/Question.pm 第 72 行.

Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/^(.*?)(\\)?\${ <-- HERE ([^{}]+)}(.*)$/ at /usr/share/perl5/Debconf/Question.pm line 72.

不推荐使用正则表达式中未转义的左大括号，在正则表达式中传递；由 <-- HERE 标记在 m/\${ <-- HERE ([^}]+)}/ at/usr/share/perl5/Debconf/Config.pm 第 30 行.

Unescaped left brace in regex is deprecated, passed through in regex; marked by <-- HERE in m/\${ <-- HERE ([^}]+)}/ at /usr/share/perl5/Debconf/Config.pm line 30.

当我跳到第 72 行时，这是我看到的

When I jump to the line 72 this is what I see

while ($rest =~ m/^(.*?)(\\)?\${([^{}]+)}(.*)$/sg) {

推荐答案

这是一个弃用的警告，表明代码将在未来停止工作.

It's a deprecation warning indicating the code will stop working in the future.

如果你想从字面上匹配 { ，你应该转义它.

If you want to match a { literally, you should escape it.

换句话说，您可以通过将第一个 { 替换为 \{ 来解决问题(消除警告).

In other words, you can fix the issue (silencing the warning) by replacing the first { with \{.

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