Examples with RecognitionException org.antlr.v4.runtime.RecognitionException used on opensource projects

Example 6 with RecognitionException

use of org.antlr.v4.runtime.RecognitionException in project antlr4 by antlr.

the class RuleFunction method getElementFrequenciesForAlt.

/** Given list of X and r refs in alt, compute how many of each there are */
protected Pair<FrequencySet<String>, FrequencySet<String>> getElementFrequenciesForAlt(AltAST ast) {
    try {
        ElementFrequenciesVisitor visitor = new ElementFrequenciesVisitor(new CommonTreeNodeStream(new GrammarASTAdaptor(), ast));
        visitor.outerAlternative();
        if (visitor.frequencies.size() != 1) {
            factory.getGrammar().tool.errMgr.toolError(ErrorType.INTERNAL_ERROR);
            return new Pair<>(new FrequencySet<String>(), new FrequencySet<String>());
        }
        return new Pair<>(visitor.getMinFrequencies(), visitor.frequencies.peek());
    } catch (RecognitionException ex) {
        factory.getGrammar().tool.errMgr.toolError(ErrorType.INTERNAL_ERROR, ex);
        return new Pair<>(new FrequencySet<String>(), new FrequencySet<String>());
    }
}

Example 7 with RecognitionException

use of org.antlr.v4.runtime.RecognitionException in project antlr4 by antlr.

the class TestVisitors method testVisitErrorNode.

/**
	 * This test verifies the basic behavior of visitors, with an emphasis on
	 * {@link AbstractParseTreeVisitor#visitErrorNode}.
	 */
@Test
public void testVisitErrorNode() {
    String input = "";
    VisitorBasicLexer lexer = new VisitorBasicLexer(new ANTLRInputStream(input));
    VisitorBasicParser parser = new VisitorBasicParser(new CommonTokenStream(lexer));
    final List<String> errors = new ArrayList<>();
    parser.removeErrorListeners();
    parser.addErrorListener(new BaseErrorListener() {

        @Override
        public void syntaxError(Recognizer<?, ?> recognizer, Object offendingSymbol, int line, int charPositionInLine, String msg, RecognitionException e) {
            errors.add("line " + line + ":" + charPositionInLine + " " + msg);
        }
    });
    VisitorBasicParser.SContext context = parser.s();
    Assert.assertEquals("(s <missing 'A'> <EOF>)", context.toStringTree(parser));
    Assert.assertEquals(1, errors.size());
    Assert.assertEquals("line 1:0 missing 'A' at '<EOF>'", errors.get(0));
    VisitorBasicVisitor<String> listener = new VisitorBasicBaseVisitor<String>() {

        @Override
        public String visitErrorNode(ErrorNode node) {
            return "Error encountered: " + node.getSymbol();
        }

        @Override
        protected String defaultResult() {
            return "";
        }

        @Override
        protected String aggregateResult(String aggregate, String nextResult) {
            return aggregate + nextResult;
        }
    };
    String result = listener.visit(context);
    String expected = "Error encountered: [@-1,-1:-1='<missing 'A'>',<1>,1:0]";
    Assert.assertEquals(expected, result);
}

Example 8 with RecognitionException

use of org.antlr.v4.runtime.RecognitionException in project antlr4 by antlr.

the class ParserATNFactory method _createATN.

protected void _createATN(Collection<Rule> rules) {
    createRuleStartAndStopATNStates();
    GrammarASTAdaptor adaptor = new GrammarASTAdaptor();
    for (Rule r : rules) {
        // find rule's block
        GrammarAST blk = (GrammarAST) r.ast.getFirstChildWithType(ANTLRParser.BLOCK);
        CommonTreeNodeStream nodes = new CommonTreeNodeStream(adaptor, blk);
        ATNBuilder b = new ATNBuilder(nodes, this);
        try {
            setCurrentRuleName(r.name);
            Handle h = b.ruleBlock(null);
            rule(r.ast, r.name, h);
        } catch (RecognitionException re) {
            ErrorManager.fatalInternalError("bad grammar AST structure", re);
        }
    }
}

Example 9 with RecognitionException

use of org.antlr.v4.runtime.RecognitionException in project antlr4 by antlr.

the class Tool method parse.

public GrammarRootAST parse(String fileName, CharStream in) {
    try {
        GrammarASTAdaptor adaptor = new GrammarASTAdaptor(in);
        ToolANTLRLexer lexer = new ToolANTLRLexer(in, this);
        CommonTokenStream tokens = new CommonTokenStream(lexer);
        lexer.tokens = tokens;
        ToolANTLRParser p = new ToolANTLRParser(tokens, this);
        p.setTreeAdaptor(adaptor);
        try {
            ParserRuleReturnScope r = p.grammarSpec();
            GrammarAST root = (GrammarAST) r.getTree();
            if (root instanceof GrammarRootAST) {
                ((GrammarRootAST) root).hasErrors = lexer.getNumberOfSyntaxErrors() > 0 || p.getNumberOfSyntaxErrors() > 0;
                assert ((GrammarRootAST) root).tokenStream == tokens;
                if (grammarOptions != null) {
                    ((GrammarRootAST) root).cmdLineOptions = grammarOptions;
                }
                return ((GrammarRootAST) root);
            }
        } catch (v3TreeGrammarException e) {
            errMgr.grammarError(ErrorType.V3_TREE_GRAMMAR, fileName, e.location);
        }
        return null;
    } catch (RecognitionException re) {
        // TODO: do we gen errors now?
        ErrorManager.internalError("can't generate this message at moment; antlr recovers");
    }
    return null;
}

Example 10 with RecognitionException

use of org.antlr.v4.runtime.RecognitionException in project aic-praise by aic-sri-international.

the class HOGMQueryRunner method query.

public List<HOGMQueryResult> query() {
    List<HOGMQueryResult> result = new ArrayList<>();
    Expression queryExpr = null;
    //
    ParsedHOGModel parsedModel = null;
    for (String query : queries) {
        long startQuery = System.currentTimeMillis();
        List<HOGMQueryError> errors = new ArrayList<>();
        try {
            if (model == null || model.trim().equals("")) {
                errors.add(new HOGMQueryError(HOGMQueryError.Context.MODEL, "Model not specified", 0, 0, 0));
            }
            if (query == null || query.trim().equals("")) {
                errors.add(new HOGMQueryError(HOGMQueryError.Context.QUERY, "Query not specified", 0, 0, 0));
            }
            if (errors.size() == 0) {
                HOGMParserWrapper parser = new HOGMParserWrapper();
                if (parsedModel == null) {
                    parsedModel = parser.parseModel(model, new QueryErrorListener(HOGMQueryError.Context.MODEL, errors));
                }
                queryExpr = parser.parseTerm(query, new QueryErrorListener(HOGMQueryError.Context.QUERY, errors));
                if (errors.size() == 0) {
                    FactorsAndTypes factorsAndTypes = new ExpressionFactorsAndTypes(parsedModel);
                    if (!canceled) {
                        inferencer = new InferenceForFactorGraphAndEvidence(factorsAndTypes, false, null, true, getOptionalTheory());
                        startQuery = System.currentTimeMillis();
                        Expression marginal = inferencer.solve(queryExpr);
                        result.add(new HOGMQueryResult(query, queryExpr, parsedModel, marginal, System.currentTimeMillis() - startQuery));
                    }
                }
            }
        } catch (RecognitionException re) {
            errors.add(new HOGMQueryError(HOGMQueryError.Context.MODEL, re.getMessage(), re.getOffendingToken().getLine(), re.getOffendingToken().getStartIndex(), re.getOffendingToken().getStopIndex()));
        } catch (UnableToParseAllTheInputError utpai) {
            errors.add(new HOGMQueryError(utpai));
        } catch (HOGModelException me) {
            me.getErrors().forEach(modelError -> {
                String inStatement = modelError.getInStatementInfo().statement.toString();
                String inSource = modelError.getInStatementInfo().sourceText;
                String inSubStatement = modelError.getMessage();
                String inInfo = "";
                if (inSubStatement.equals("") || inSubStatement.equals(inSource)) {
                    inInfo = " in '" + inStatement + "'";
                } else {
                    inInfo = " ('" + inSubStatement + "') in '" + inStatement + "'";
                }
                if (!inSource.replaceAll(" ", "").replaceAll(";", "").equals(inStatement.replaceAll(" ", ""))) {
                    inInfo = inInfo + " derived from '" + inSource + "'";
                }
                errors.add(new HOGMQueryError(HOGMQueryError.Context.MODEL, modelError.getErrorType().formattedMessage() + inInfo, modelError.getInStatementInfo().line, modelError.getInStatementInfo().startIndex, modelError.getInStatementInfo().endIndex));
            });
        } catch (Throwable t) {
            // Unexpected
            errors.add(new HOGMQueryError(t));
        }
        if (errors.size() > 0) {
            result.add(new HOGMQueryResult(query, queryExpr, parsedModel, errors, System.currentTimeMillis() - startQuery));
        }
    }
    return result;
}