AutoCompletion.java 文件源码

public static @Nullable AutoCompletionContext getContext(int index, String text) {
  ANTLRInputStream input = new ANTLRInputStream(text);
  MplLexer lexer = new MplLexer(input);
  lexer.removeErrorListeners();
  TokenStream tokens = new CommonTokenStream(lexer);
  MplParser parser = new MplParser(tokens);
  parser.removeErrorListeners();
  FileContext ctx = parser.file();

  AutoCompletionListener listener = new AutoCompletionListener(index);
  try {
    new ParseTreeWalker().walk(listener, ctx);
  } catch (ResultException earlyExit) {
    return earlyExit.getResult();
  }
  return null;
}