Examples with Start de.be4.eventb.core.parser.node.Start used on opensource projects

Example 6 with Start

use of de.be4.eventb.core.parser.node.Start in project probparsers by bendisposto.

the class StructureTest method testIdentifierTick.

@Test
public void testIdentifierTick() throws Exception {
    final Start root = parseInput("machine Mac variables x' y end", false);
    final AMachineParseUnit parseUnit = (AMachineParseUnit) root.getPParseUnit();
    final LinkedList<PVariable> variables = parseUnit.getVariables();
    assertEquals(2, variables.size());
    assertEquals("x'", ((AVariable) variables.get(0)).getName().getText());
    assertEquals("y", ((AVariable) variables.get(1)).getName().getText());
}

Example 7 with Start

use of de.be4.eventb.core.parser.node.Start in project probparsers by bendisposto.

the class EventBParser method parse.

/**
 * Parses the input string.
 *
 * @param input
 *            the {@link String} to be parsed
 * @param debugOutput
 *            output debug messages on standard out?
 * @return the root node of the AST
 * @throws BException
 *             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 sourcecode 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 EventBLexerException}: 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 sourcecode
 *             position where the error occured. 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 sourcecode position of the last characters that
 *             were read from the input.</li>
 *             <li> {@link EventBParseException}: This exception is thrown in
 *             two situations. On the one hand if the parser throws a
 *             {@link ParserException} we convert it into a
 *             {@link EventBParseException}. On the other hand it can be
 *             thrown if any error is found during the AST transformations
 *             after the parser has finished. We try to provide a token if a
 *             single token is involved in the error. Otherwise a
 *             {@link SourcecodeRange} is provided, which can be used to
 *             retrieve detailed position information from the
 *             {@link SourcePositions} (s. {@link #getSourcePositions()}).</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 dublicate machine clauses,
 *             we will list all occurances in the exception.</li>
 *             </ul>
 */
public Start parse(final String input, final boolean debugOutput) throws BException {
    final Reader reader = new StringReader(input);
    try {
        /*
			 * Main parser
			 */
        final EventBLexer lexer = new EventBLexer(new PushbackReader(reader, 99));
        lexer.setDebugOutput(debugOutput);
        Parser parser = new Parser(lexer);
        final Start rootNode = parser.parse();
        final List<IToken> tokenList = ((ITokenListContainer) lexer).getTokenList();
        /*
			 * Retrieving sourcecode positions which were found by ParserAspect
			 */
        final Map<PositionedNode, SourcecodeRange> positions = ((IParser) parser).getMapping();
        sourcePositions = new SourcePositions(tokenList, positions);
        parser = null;
        return rootNode;
    } catch (final LexerException e) {
        /*
			 * Actually it's supposed to be a EventBLexerException because the
			 * aspect 'LexerAspect' replaces any LexerException to provide
			 * sourcecode position information in the BLexerException.
			 */
        throw new BException(e);
    } catch (final ParserException e) {
        throw new BException(createEventBParseException(e));
    } catch (final EventBParseException e) {
        throw new BException(e);
    } catch (final IOException e) {
        // shouldn't happen and if, we cannot handle it
        throw new BException(e);
    }
}

Example 8 with Start

use of de.be4.eventb.core.parser.node.Start in project probparsers by bendisposto.

the class AbstractTest method parseInput.

protected Start parseInput(final String input, final boolean debugOutput) throws BException {
    if (debugOutput) {
        System.out.println();
        System.out.println();
    }
    final EventBParser parser = new EventBParser();
    final Start rootNode = parser.parse(input, debugOutput);
    return rootNode;
}

Example 9 with Start

use of de.be4.eventb.core.parser.node.Start in project probparsers by bendisposto.

the class CommentTest method testCommentVariables1.

@Test
public void testCommentVariables1() throws Exception {
    final Start rootNode = parseInput("machine CommentVariables1 variables\n" + "varA" + "//varA comment\n" + " varB\n" + "varC\n" + "/*varC\ncomment*/" + "end", false);
    final AMachineParseUnit parseUnit = (AMachineParseUnit) rootNode.getPParseUnit();
    final LinkedList<PVariable> variables = parseUnit.getVariables();
    assertEquals(3, variables.size());
    AVariable variable = (AVariable) variables.get(0);
    assertEquals("varA", variable.getName().getText());
    assertEquals("varA comment", variable.getComments().get(0).getText());
    variable = (AVariable) variables.get(1);
    assertEquals("varB", variable.getName().getText());
    assertEquals(0, variable.getComments().size());
    variable = (AVariable) variables.get(2);
    assertEquals("varC", variable.getName().getText());
    final LinkedList<TComment> comments = variable.getComments();
    assertNotNull(comments);
    assertEquals(1, comments.size());
    final StringTokenizer tokenizer = new StringTokenizer(comments.get(0).getText(), "\n\r");
    assertEquals(2, tokenizer.countTokens());
    assertEquals("varC", tokenizer.nextToken());
    assertEquals("comment", tokenizer.nextToken());
}

Example 10 with Start

use of de.be4.eventb.core.parser.node.Start in project probparsers by bendisposto.

the class CommentTest method testCommentPredicates1.

@Test
public void testCommentPredicates1() throws Exception {
    final Start rootNode = parseInput("machine CommentPredicates1 invariants\n @inv1 asdf //MyComment\nend", false);
    final AMachineParseUnit parseUnit = (AMachineParseUnit) rootNode.getPParseUnit();
    final LinkedList<PInvariant> invariants = parseUnit.getInvariants();
    final AInvariant invariant = (AInvariant) invariants.get(0);
    // correct comment content?
    assertEquals("MyComment", invariant.getComments().get(0).getText());
}