/** Parser error-reporting function can be overridden in subclass */
void Parser::reportError(const RecognitionException& ex)
{
// DW 060204 Amended to indicate error in DOS window
ANTLR_USE_NAMESPACE(std)cerr << "cerr " << ex.toString().c_str() << ANTLR_USE_NAMESPACE(std)endl;
// DW 060204 Inserted to show position of condition in trace output
ANTLR_USE_NAMESPACE(std)cout << "cout " << ex.toString().c_str() << ANTLR_USE_NAMESPACE(std)endl;
}
void DefaultErrorStrategy::reportError(Parser *recognizer, const RecognitionException &e) {
// If we've already reported an error and have not matched a token
// yet successfully, don't report any errors.
if (inErrorRecoveryMode(recognizer)) {
return; // don't report spurious errors
}
beginErrorCondition(recognizer);
if (is<const NoViableAltException *>(&e)) {
reportNoViableAlternative(recognizer, (const NoViableAltException &)e);
} else if (is<const InputMismatchException *>(&e)) {
reportInputMismatch(recognizer, (const InputMismatchException &)e);
} else if (is<const FailedPredicateException *>(&e)) {
reportFailedPredicate(recognizer, (const FailedPredicateException &)e);
} else if (is<const RecognitionException *>(&e)) {
recognizer->notifyErrorListeners(e.getOffendingToken(), e.what(), std::current_exception());
}
}
void ParserInterpreter::recover(RecognitionException &e) {
size_t i = _input->index();
getErrorHandler()->recover(this, std::make_exception_ptr(e));
if (_input->index() == i) {
// no input consumed, better add an error node
if (is<InputMismatchException *>(&e)) {
InputMismatchException &ime = (InputMismatchException&)e;
Token *tok = e.getOffendingToken();
size_t expectedTokenType = ime.getExpectedTokens().getMinElement(); // get any element
_errorToken = getTokenFactory()->create({ tok->getTokenSource(), tok->getTokenSource()->getInputStream() },
expectedTokenType, tok->getText(), Token::DEFAULT_CHANNEL, INVALID_INDEX, INVALID_INDEX, // invalid start/stop
tok->getLine(), tok->getCharPositionInLine());
_ctx->addErrorNode(_tracker, _errorToken.get());
}
else { // NoViableAlt
Token *tok = e.getOffendingToken();
_errorToken = getTokenFactory()->create({ tok->getTokenSource(), tok->getTokenSource()->getInputStream() },
Token::INVALID_TYPE, tok->getText(), Token::DEFAULT_CHANNEL, INVALID_INDEX, INVALID_INDEX, // invalid start/stop
tok->getLine(), tok->getCharPositionInLine());
_ctx->addErrorNode(_tracker, _errorToken.get());
}
}
}
/** Report exception errors caught in nextToken() */
void CharScanner::reportError(const RecognitionException& ex)
{
ANTLR_USE_NAMESPACE(std)cerr << ex.toString().c_str() << ANTLR_USE_NAMESPACE(std)endl;
}