AntlrErrorString.java 文件源码

public static String noViableAlt(Parser recognizer, NoViableAltException e) {
    TokenStream tokens = recognizer.getInputStream();
    String input = null;
    if (tokens != null) {
        Token startToken = e.getStartToken();
        if (startToken.getType() == Token.EOF) {
            input = "<EOF>";
        } else {
            input = tokens.getText(
                    startToken, e.getOffendingToken()
            );
        }
    }
    return "syntax error at input:" + input;
}