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

Example 56 with Parser

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

the class TestATNConstruction method testAorBstar.

@Test
public void testAorBstar() throws Exception {
    Grammar g = new Grammar("parser grammar P;\n" + "a : (A | B{;})* ;");
    String expecting = "RuleStart_a_0->StarLoopEntry_7\n" + "StarLoopEntry_7->StarBlockStart_5\n" + "StarLoopEntry_7->s8\n" + "StarBlockStart_5->s2\n" + "StarBlockStart_5->s3\n" + "s8->RuleStop_a_1\n" + "s2-A->BlockEnd_6\n" + "s3-B->s4\n" + "RuleStop_a_1-EOF->s10\n" + "BlockEnd_6->StarLoopBack_9\n" + "s4-action_0:-1->BlockEnd_6\n" + "StarLoopBack_9->StarLoopEntry_7\n";
    checkRuleATN(g, "a", expecting);
}

Example 57 with Parser

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

the class TestATNConstruction method testSetAorBoptional.

@Test
public void testSetAorBoptional() throws Exception {
    Grammar g = new Grammar("parser grammar P;\n" + "a : (A|B)?;");
    String expecting = "RuleStart_a_0->BlockStart_3\n" + "BlockStart_3->s2\n" + "BlockStart_3->BlockEnd_4\n" + "s2-{A, B}->BlockEnd_4\n" + "BlockEnd_4->RuleStop_a_1\n" + "RuleStop_a_1-EOF->s5\n";
    checkRuleATN(g, "a", expecting);
}

Example 58 with Parser

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

the class TestATNConstruction method testA.

@Test
public void testA() throws Exception {
    Grammar g = new Grammar("parser grammar P;\n" + "a : A;");
    String expecting = "RuleStart_a_0->s2\n" + "s2-A->s3\n" + "s3->RuleStop_a_1\n" + "RuleStop_a_1-EOF->s4\n";
    checkRuleATN(g, "a", expecting);
}

Example 59 with Parser

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

the class TreeViewer method showInDialog.

protected static JFrame showInDialog(final TreeViewer viewer) {
    final JFrame dialog = new JFrame();
    dialog.setTitle("Parse Tree Inspector");
    final Preferences prefs = Preferences.userNodeForPackage(TreeViewer.class);
    // Make new content panes
    final Container mainPane = new JPanel(new BorderLayout(5, 5));
    final Container contentPane = new JPanel(new BorderLayout(0, 0));
    contentPane.setBackground(Color.white);
    // Wrap viewer in scroll pane
    JScrollPane scrollPane = new JScrollPane(viewer);
    // Make the scrollpane (containing the viewer) the center component
    contentPane.add(scrollPane, BorderLayout.CENTER);
    JPanel wrapper = new JPanel(new FlowLayout());
    // Add button to bottom
    JPanel bottomPanel = new JPanel(new BorderLayout(0, 0));
    contentPane.add(bottomPanel, BorderLayout.SOUTH);
    JButton ok = new JButton("OK");
    ok.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            dialog.dispatchEvent(new WindowEvent(dialog, WindowEvent.WINDOW_CLOSING));
        }
    });
    wrapper.add(ok);
    // Add an export-to-png button right of the "OK" button
    JButton png = new JButton("Export as PNG");
    png.addActionListener(new ActionListener() {

        @Override
        public void actionPerformed(ActionEvent e) {
            generatePNGFile(viewer, dialog);
        }
    });
    wrapper.add(png);
    bottomPanel.add(wrapper, BorderLayout.SOUTH);
    // Add scale slider
    double lastKnownViewerScale = prefs.getDouble(DIALOG_VIEWER_SCALE_PREFS_KEY, viewer.getScale());
    viewer.setScale(lastKnownViewerScale);
    int sliderValue = (int) ((lastKnownViewerScale - 1.0) * 1000);
    final JSlider scaleSlider = new JSlider(JSlider.HORIZONTAL, -999, 1000, sliderValue);
    scaleSlider.addChangeListener(new ChangeListener() {

        @Override
        public void stateChanged(ChangeEvent e) {
            int v = scaleSlider.getValue();
            viewer.setScale(v / 1000.0 + 1.0);
        }
    });
    bottomPanel.add(scaleSlider, BorderLayout.CENTER);
    // Add a JTree representing the parser tree of the input.
    JPanel treePanel = new JPanel(new BorderLayout(5, 5));
    // An "empty" icon that will be used for the JTree's nodes.
    Icon empty = new EmptyIcon();
    UIManager.put("Tree.closedIcon", empty);
    UIManager.put("Tree.openIcon", empty);
    UIManager.put("Tree.leafIcon", empty);
    Tree parseTreeRoot = viewer.getTree().getRoot();
    TreeNodeWrapper nodeRoot = new TreeNodeWrapper(parseTreeRoot, viewer);
    fillTree(nodeRoot, parseTreeRoot, viewer);
    final JTree tree = new JTree(nodeRoot);
    tree.getSelectionModel().setSelectionMode(TreeSelectionModel.SINGLE_TREE_SELECTION);
    tree.addTreeSelectionListener(new TreeSelectionListener() {

        @Override
        public void valueChanged(TreeSelectionEvent e) {
            JTree selectedTree = (JTree) e.getSource();
            TreePath path = selectedTree.getSelectionPath();
            if (path != null) {
                TreeNodeWrapper treeNode = (TreeNodeWrapper) path.getLastPathComponent();
                // Set the clicked AST.
                viewer.setTree((Tree) treeNode.getUserObject());
            }
        }
    });
    treePanel.add(new JScrollPane(tree));
    // Create the pane for both the JTree and the AST
    final JSplitPane splitPane = new JSplitPane(JSplitPane.HORIZONTAL_SPLIT, treePanel, contentPane);
    mainPane.add(splitPane, BorderLayout.CENTER);
    dialog.setContentPane(mainPane);
    // make viz
    WindowListener exitListener = new WindowAdapter() {

        @Override
        public void windowClosing(WindowEvent e) {
            prefs.putInt(DIALOG_WIDTH_PREFS_KEY, (int) dialog.getSize().getWidth());
            prefs.putInt(DIALOG_HEIGHT_PREFS_KEY, (int) dialog.getSize().getHeight());
            prefs.putDouble(DIALOG_X_PREFS_KEY, dialog.getLocationOnScreen().getX());
            prefs.putDouble(DIALOG_Y_PREFS_KEY, dialog.getLocationOnScreen().getY());
            prefs.putInt(DIALOG_DIVIDER_LOC_PREFS_KEY, splitPane.getDividerLocation());
            prefs.putDouble(DIALOG_VIEWER_SCALE_PREFS_KEY, viewer.getScale());
            dialog.setVisible(false);
            dialog.dispose();
        }
    };
    dialog.addWindowListener(exitListener);
    dialog.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
    int width = prefs.getInt(DIALOG_WIDTH_PREFS_KEY, 600);
    int height = prefs.getInt(DIALOG_HEIGHT_PREFS_KEY, 500);
    dialog.setPreferredSize(new Dimension(width, height));
    dialog.pack();
    // After pack(): set the divider at 1/3 (200/600) of the frame.
    int dividerLocation = prefs.getInt(DIALOG_DIVIDER_LOC_PREFS_KEY, 200);
    splitPane.setDividerLocation(dividerLocation);
    if (prefs.getDouble(DIALOG_X_PREFS_KEY, -1) != -1) {
        dialog.setLocation((int) prefs.getDouble(DIALOG_X_PREFS_KEY, 100), (int) prefs.getDouble(DIALOG_Y_PREFS_KEY, 100));
    } else {
        dialog.setLocationRelativeTo(null);
    }
    dialog.setVisible(true);
    return dialog;
}

Example 60 with Parser

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

the class SemanticPipeline method assignLexerTokenTypes.

void assignLexerTokenTypes(Grammar g, List<GrammarAST> tokensDefs) {
    // put in root, even if imported
    Grammar G = g.getOutermostGrammar();
    for (GrammarAST def : tokensDefs) {
        // tokens { id (',' id)* } so must check IDs not TOKEN_REF
        if (Grammar.isTokenName(def.getText())) {
            G.defineTokenName(def.getText());
        }
    }
    /* Define token types for nonfragment rules which do not include a 'type(...)'
		 * or 'more' lexer command.
		 */
    for (Rule r : g.rules.values()) {
        if (!r.isFragment() && !hasTypeOrMoreCommand(r)) {
            G.defineTokenName(r.name);
        }
    }
    // FOR ALL X : 'xxx'; RULES, DEFINE 'xxx' AS TYPE X
    List<Pair<GrammarAST, GrammarAST>> litAliases = Grammar.getStringLiteralAliasesFromLexerRules(g.ast);
    Set<String> conflictingLiterals = new HashSet<String>();
    if (litAliases != null) {
        for (Pair<GrammarAST, GrammarAST> pair : litAliases) {
            GrammarAST nameAST = pair.a;
            GrammarAST litAST = pair.b;
            if (!G.stringLiteralToTypeMap.containsKey(litAST.getText())) {
                G.defineTokenAlias(nameAST.getText(), litAST.getText());
            } else {
                // oops two literal defs in two rules (within or across modes).
                conflictingLiterals.add(litAST.getText());
            }
        }
        for (String lit : conflictingLiterals) {
            // Remove literal if repeated across rules so it's not
            // found by parser grammar.
            Integer value = G.stringLiteralToTypeMap.remove(lit);
            if (value != null && value > 0 && value < G.typeToStringLiteralList.size() && lit.equals(G.typeToStringLiteralList.get(value))) {
                G.typeToStringLiteralList.set(value, null);
            }
        }
    }
}