替换没有被单引号包围的双引号 [英] Replace double quotes not surrounded by single quotes

问题描述

如果双引号没有被使用 PCRE 的单引号包围，我想用单引号替换双引号.一些例子，意思是输入=>输出

I want to replace double quotes with single quotes if they aren't surrounded by single qoutes using PCRE. Some examples, the meaning is input => output

"foo" => 'foo'
'foo' => 'foo'
abc "foo" => abc 'foo'
foo "bar", "baz" => foo 'bar', 'baz'
abc 'foo "bar" baz' => abc 'foo "bar" baz'

我尝试了 ^([^'"]*)"([^'"]*)" 与修饰符 m multi-line 和 'g global`.只要每行不超过一个xyz"块(在第 4 行失败)，这种方法就有效.

I tried ^([^'"]*)"([^'"]*)" with the modifiers m multi-line and 'g global`. This works as far as there isn't more than one "xyz" block per line (fails in line 4).

我忘了提到我目前的替代品是 $1'$2'

I forgot to mention that my current substitution is $1'$2'

推荐答案

下面的解决方案仅适用于输入字符串没有转义序列的情况:

/'[^']*'(*SKIP)(*F)|"/

查看正则表达式演示

• '[^']*' - 匹配单引号，0+ 字符而不是单引号和单引号
• (*SKIP)(*F) - PCRE 动词序列丢弃匹配并从当前索引开始(您可以在 如何(*SKIP) 或(*F) 处理正则表达式? SO post)
• | - 或...
• " - 双引号.

• '[^']*' - match a single quote, 0+ chars other than a single quote and a single quote again
• (*SKIP)(*F) - PCRE verb sequence discarding the match and proceeding from the current index (you can read more on that at How do (*SKIP) or (*F) work on regex? SO post)
• | - or...
• " - a double quote.

如果有转义序列，你需要写一个解析器.

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