Regex 这个正则表达式的含义

谁能告诉我这个正则表达式标识了什么：

（？！[^&；]+；）（？！）（？！[^&；]+；）

谢谢

第一个：

"
(?!         # Assert that it is impossible to match the regex below starting at this position (negative lookahead)
   [^&;]       # Match a single character NOT present in the list “&;”
      +           # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
   ;           # Match the character “;” literally
)
(?!         # Assert that it is impossible to match the regex below starting at this position (negative lookahead)
   <           # Match the character “<” literally
   [^<>]       # Match a single character NOT present in the list “<>”
      *           # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
)
"

”
（？！#断言从这个位置开始不可能匹配下面的正则表达式（负前瞻）
[^&]#匹配列表中不存在的单个字符“&；”
+#在一次和无限次之间，尽可能多次，根据需要回馈（贪婪）
##按字面意思匹配字符“；”
)
（？！#断言从这个位置开始不可能匹配下面的正则表达式（负前瞻）
<#按字面意思匹配字符“#按字面意思匹配字符”>
)
（？！#断言从这个位置开始不可能匹配下面的正则表达式（负前瞻）
[^&]#匹配列表中不存在的单个字符“&；”
+#在一次和无限次之间，尽可能多次，根据需要回馈（贪婪）
##按字面意思匹配字符“；”
)
"

---

请注意，这两个表达式实际上并没有捕获任何内容，但它们可能用于精确定位字符串内部的位置。没有任何上下文，很难准确说出它们的使用位置。

非常感谢。这对我帮助很大！！@FailedDev先生，你是个天才。你有没有用来帮助解析它的应用程序，或者你只是一个regex大师吗？@Daryl不，我不是天才，是的，我有一个应用程序。Expresso/regexbuddy举几个例子。

"
(?!         # Assert that it is impossible to match the regex below starting at this position (negative lookahead)
   [^<>]       # Match a single character NOT present in the list “<>”
      *           # Between zero and unlimited times, as many times as possible, giving back as needed (greedy)
   >           # Match the character “>” literally
)
(?!         # Assert that it is impossible to match the regex below starting at this position (negative lookahead)
   [^&;]       # Match a single character NOT present in the list “&;”
      +           # Between one and unlimited times, as many times as possible, giving back as needed (greedy)
   ;           # Match the character “;” literally
)
"