Java 我的scala文件失败了Scala.g4 ANTLR语法

我正在使用ANTLR解析scala文件.

我在这里找到了scala langage的语法: https://github.com/antlr/grammars-v4/blob/master/scala/Scala.g4

感谢antlr4—maven—plugin，我从语法生成了ANTLR类.

<plugin>
    <groupId>org.antlr</groupId>
    <artifactId>antlr4-maven-plugin</artifactId>
    <version>4.13.1</version>
    <executions>
        <execution>
            <id>antlr-generate</id>
            <phase>generate-sources</phase>
            <goals>
                <goal>antlr4</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <sourceDirectory>src/main/antlr4</sourceDirectory>
        <outputDirectory>target/generated-sources/antlr4</outputDirectory>
        <listener>true</listener>
        <visitor>true</visitor>
    </configuration>
</plugin>

我对运行时有依赖性:

<dependency>
    <groupId>org.antlr</groupId>
    <artifactId>antlr4-runtime</artifactId>
    <version>4.13.1</version>
</dependency>

下面是我解析scala文件的代码:

public class Main {

    public static void main(String[] args) throws IOException {
        Path filePath = Paths.get(args[0]);
        CharStream charStream = CharStreams.fromPath(filePath , StandardCharsets.UTF_8);
        ScalaLexer lexer = new ScalaLexer(charStream);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        ScalaParser parser = new ScalaParser(tokens);
        ParseTree tree = parser.compilationUnit();
        ParseTreeWalker.DEFAULT.walk(new ScalaBaseListener(), tree);
    }
}

我成功地使用了这个scala文件test. scala作为输入:

object replace extends RewriteRule {
  def transform(node: Node): Seq[Node] = node match {
    case <abc:name>{ value @ _* }</abc:name> => <abc:surname>{ value }</abc:surname>
    case _ => node
  }
}

然而，添加了override个关键字的输入失败:

object replace extends RewriteRule {
  override def transform(node: Node): Seq[Node] = node match {
    case <abc:name>{ value @ _* }</abc:name> => <abc:surname>{ value }</abc:surname>
    case _ => node
  }
}

stderr说它发现了意想不到的字符，比如<abc:name>中的:.

line 3:13 extraneous input ':' expecting {'-', 'null', 'this', 'super', '(', '_', Id, BooleanLiteral, CharacterLiteral, SymbolLiteral, IntegerLiteral, StringLiteral, FloatingPointLiteral, Varid, NL}
line 3:19 extraneous input '{' expecting {'-', 'null', 'this', 'super', '(', '_', Id, BooleanLiteral, CharacterLiteral, SymbolLiteral, IntegerLiteral, StringLiteral, FloatingPointLiteral, Varid, NL}
line 3:27 mismatched input '@' expecting {'=>', 'if'}
line 3:30 extraneous input '*' expecting {'-', 'null', 'this', 'super', '(', '{', '}', 'type', 'val', '_', 'implicit', 'if', 'while', 'try', 'do', 'for', 'throw', 'return', '+', '~', '!', 'new', 'lazy', 'case', '@', 'var', 'override', 'abstract', 'final', 'sealed', 'private', 'protected', 'import', 'def', 'class', 'object', 'trait', Id, BooleanLiteral, CharacterLiteral, SymbolLiteral, IntegerLiteral, StringLiteral, FloatingPointLiteral}

scala文件是正确的，它是我想要解析的文件的简化版本，它可以编译.

我需要在语法中修正什么？