Examples with CheckException de.be4.classicalb.core.parser.exceptions.CheckException used on opensource projects

Example 36 with CheckException

use of de.be4.classicalb.core.parser.exceptions.CheckException in project probparsers by bendisposto.

the class PrimedIdentifierTest method testRestrictedUsage.

@Test
public void testRestrictedUsage() {
    final String testMachine = "#SUBSTITUTION x : (x = x$5)";
    try {
        getTreeAsString(testMachine);
        fail("exception expected");
    } catch (BCompoundException e) {
        assertTrue(e.getFirstException().getCause() instanceof CheckException);
    // ok
    }
}

Example 37 with CheckException

use of de.be4.classicalb.core.parser.exceptions.CheckException in project probparsers by bendisposto.

the class BParser method parse.

/**
 * Parses the input string.
 *
 * @param input
 *            The {@link String} to be parsed
 * @param debugOutput
 *            output debug messages on standard out?
 * @param contentProvider
 *            A {@link IFileContentProvider} that is able to load content of
 *            referenced files during the parsing process. The content
 *            provider is used for referenced definition files for example.
 * @return the root node of the AST
 * @throws BCompoundException
 *             The {@link BCompoundException} class stores all
 *             {@link BException}s occurred during the parsing process. The
 *             {@link BException} class stores the actual exception as
 *             delegate and forwards all method calls to it. So it is save
 *             for tools to just use this exception if they want to extract
 *             an error message. If the tools needs to extract additional
 *             information, such as a source code position or involved
 *             tokens respectively nodes, it needs to retrieve the delegate
 *             exception. The {@link BException} class offers a
 *             {@link BException#getCause()} method for this, which returns
 *             the delegate exception.
 *             <p>
 *             Internal exceptions:
 *             <ul>
 *             <li>{@link PreParseException}: This exception contains errors
 *             that occur during the preparsing. If possible it supplies a
 *             token, where the error occurred.</li>
 *             <li>{@link BLexerException}: If any error occurs in the
 *             generated or customized lexer a {@link LexerException} is
 *             thrown. Usually the lexer classes just throw a
 *             {@link LexerException}. But this class unfortunately does not
 *             contain any explicit information about the source code
 *             position where the error occurred. Using aspect-oriented
 *             programming we intercept the throwing of these exceptions to
 *             replace them by our own exception. In our own exception we
 *             provide the source code position of the last characters that
 *             were read from the input.</li>
 *             <li>{@link BParseException}: This exception is thrown in two
 *             situations. On the one hand if the parser throws a
 *             {@link ParserException} we convert it into a
 *             {@link BParseException}. On the other hand it can be thrown
 *             if any error is found during the AST transformations after
 *             the parser has finished.</li>
 *             <li>{@link CheckException}: If any problem occurs while
 *             performing semantic checks, a {@link CheckException} is
 *             thrown. We provide one or more nodes that are involved in the
 *             problem. For example, if we find duplicate machine clauses,
 *             we will list all occurrences in the exception.</li>
 *             </ul>
 */
public Start parse(final String input, final boolean debugOutput, final IFileContentProvider contentProvider) throws BCompoundException {
    final Reader reader = new StringReader(input);
    try {
        // PreParsing
        final DefinitionTypes defTypes = preParsing(debugOutput, reader, contentProvider, directory);
        /*
			 * The definition types are used in the lexer in order to replace an
			 * identifier token by a definition call token. This is required if
			 * the definition is a predicate because an identifier can not be
			 * parsed as a predicate. For example "... SELECT def THEN ... "
			 * would yield to a parse error. The lexer will replace the
			 * identifier token "def" by a TDefLiteralPredicate which will be
			 * excepted by the parser
			 * 
			 */
        defTypes.addAll(definitions.getTypes());
        /*
			 * Main parser
			 */
        final BLexer lexer = new BLexer(new PushbackReader(reader, BLexer.PUSHBACK_BUFFER_SIZE), defTypes);
        lexer.setParseOptions(parseOptions);
        SabbleCCBParser parser = new SabbleCCBParser(lexer);
        final Start rootNode = parser.parse();
        final List<BException> bExceptionList = new ArrayList<>();
        /*
			 * Collect available definition declarations. Needs to be done now
			 * cause they are needed by the following transformations.
			 */
        final DefinitionCollector collector = new DefinitionCollector(defTypes, this.definitions);
        collector.collectDefinitions(rootNode);
        List<CheckException> definitionsCollectorExceptions = collector.getExceptions();
        for (CheckException checkException : definitionsCollectorExceptions) {
            bExceptionList.add(new BException(getFileName(), checkException));
        }
        // perfom AST transformations that can't be done by SableCC
        try {
            applyAstTransformations(rootNode);
        } catch (CheckException e) {
            throw new BCompoundException(new BException(getFileName(), e));
        }
        // perform some semantic checks which are not done in the parser
        List<CheckException> checkExceptions = performSemanticChecks(rootNode);
        for (CheckException checkException : checkExceptions) {
            bExceptionList.add(new BException(getFileName(), checkException));
        }
        if (!bExceptionList.isEmpty()) {
            throw new BCompoundException(bExceptionList);
        }
        return rootNode;
    } catch (final LexerException e) {
        throw new BCompoundException(new BException(getFileName(), e));
    } catch (final BParseException e) {
        throw new BCompoundException(new BException(getFileName(), e));
    } catch (final IOException e) {
        throw new BCompoundException(new BException(getFileName(), e));
    } catch (final PreParseException e) {
        throw new BCompoundException(new BException(getFileName(), e));
    } catch (final ParserException e) {
        final Token token = e.getToken();
        String msg = getImprovedErrorMessageBasedOnTheErrorToken(token);
        if (msg == null) {
            msg = e.getLocalizedMessage();
        }
        final String realMsg = e.getRealMsg();
        throw new BCompoundException(new BException(getFileName(), new BParseException(token, msg, realMsg, e)));
    } catch (BException e) {
        throw new BCompoundException(e);
    }
}

Example 38 with CheckException

use of de.be4.classicalb.core.parser.exceptions.CheckException in project probparsers by bendisposto.

the class BParser method performSemanticChecks.

private List<CheckException> performSemanticChecks(final Start rootNode) {
    final List<CheckException> list = new ArrayList<>();
    final SemanticCheck[] checks = { new ClausesCheck(), new SemicolonCheck(), new IdentListCheck(), new DefinitionUsageCheck(getDefinitions()), new PrimedIdentifierCheck(), new ProverExpressionsCheck() };
    for (SemanticCheck check : checks) {
        check.setOptions(parseOptions);
        check.runChecks(rootNode);
        list.addAll(check.getCheckExceptions());
    }
    return list;
}

Example 39 with CheckException

use of de.be4.classicalb.core.parser.exceptions.CheckException in project probparsers by bendisposto.

the class ClausesCheck method findForbidden.

private void findForbidden(final String[] forbiddenClassNames) {
    final Set<String> clauseClasses = clauses.keySet();
    final Set<Set<Node>> wrongClauses = new HashSet<>();
    for (int i = 0; i < forbiddenClassNames.length; i++) {
        if (clauseClasses.contains(forbiddenClassNames[i])) {
            wrongClauses.add(clauses.get(forbiddenClassNames[i]));
        }
    }
    if (!wrongClauses.isEmpty()) {
        final Set<Node> nodes = new HashSet<>();
        for (final Iterator<Set<Node>> iterator = wrongClauses.iterator(); iterator.hasNext(); ) {
            final Set<Node> nodeSet = iterator.next();
            nodes.addAll(nodeSet);
        }
        exceptions.add(new CheckException("Clause not allowed in abstract machine", nodes.toArray(new Node[nodes.size()])));
    }
}

Example 40 with CheckException

use of de.be4.classicalb.core.parser.exceptions.CheckException in project probparsers by bendisposto.

the class DefinitionCollector method addDefinition.

private void addDefinition(PDefinition def, Type type, String name) {
    if (definitions.containsDefinition(name)) {
        PDefinition existingDefinition = definitions.getDefinition(name);
        File file = definitions.getFile(name);
        StringBuilder sb = new StringBuilder();
        sb.append("Duplicate definition: " + name + ".\n");
        sb.append("(First appearance: ").append(this.getPosition(existingDefinition.getStartPos()));
        if (file != null) {
            sb.append(" in ").append(file.getAbsolutePath());
        }
        sb.append(")\n");
        CheckException e = new CheckException(sb.toString(), def);
        this.exceptions.add(e);
    } else {
        definitions.addDefinition(def, type, name);
    }
}