RegEx与kotlin合作，但没有'；使用dart时无法按预期工作

正则表达式在kotlin代码中运行良好：

var text = "Today, scientists confirmed the worst possible outcome: the massive asteroid will collide with Earth"
    
val encodeRegex = Regex("""'s|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+""")
    
   val x= encodeRegex.findAll(text).map { result ->
            result.value
        }
     
    print(x.toList())

输出：

    [Today, ,,  scientists,  confirmed,  the,  worst,  possible,  outcome, :,  the,  massive,  asteroid,  will,  collide,  with,  Earth]

[Today,,  scientists,  confirmed,  the,  worst,  , ossible,  outcome:,  the,  massive,  asteroid,  will,  collide,  with,  Earth]

我尝试将相同的regexp用于flatter，但它没有按预期工作

Dart代码：

    final RegExp encodeRegex = RegExp(
    r"""'s|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+""",
  );
  
  final text ='Today, scientists confirmed the worst possible outcome: the massive asteroid will collide with Earth';
  
  
  final tokens = encodeRegex
        .allMatches(text)
        .map(
          (element) =>
              element.group(0),
        )
        .toList();
  
  print('${tokens}');

输出：

    [Today, ,,  scientists,  confirmed,  the,  worst,  possible,  outcome, :,  the,  massive,  asteroid,  will,  collide,  with,  Earth]

[Today,,  scientists,  confirmed,  the,  worst,  , ossible,  outcome:,  the,  massive,  asteroid,  will,  collide,  with,  Earth]

---

问题是，默认情况下，正则表达式与unicode类别不匹配。您需要为正则表达式添加，

unicode:true

，以匹配它们。尝试：

    main(){
final RegExp encodeRegex = RegExp(
    r"""'s|'t|'re|'ve|'m|'ll|'d| ?\p{L}+| ?\p{N}+| ?[^\s\p{L}\p{N}]+|\s+(?!\S)|\s+""", unicode: true
  );
  
final text ='Today, scientists confirmed the worst possible outcome: the massive asteroid will collide with Earth';
  
  
final tokens = encodeRegex
        .allMatches(text)
        .map(
          (element) =>
              element.group(0),
        )
        .toList();
  
  print('${tokens}');
}

它在DartPad中工作。 如果未启用unicode，则它将

p{L}

和

p{N}

匹配为文字pL和pN