CapitulatingErrorStrategy.java 文件源码

@Override
protected void reportNoViableAlternative(Parser recognizer, NoViableAltException e) {
    // change error message from default implementation
    TokenStream tokens = recognizer.getInputStream();
    String input;
    if (tokens != null) {
        if (e.getStartToken().getType() == Token.EOF) {
            input = "the end";
        } else {
            input = escapeWSAndQuote(tokens.getText(e.getStartToken(), e.getOffendingToken()));
        }
    } else {
        input = escapeWSAndQuote("<unknown input>");
    }
    String msg = "inadmissible input at " + input;
    recognizer.notifyErrorListeners(e.getOffendingToken(), msg, e);
}