Examples with ParseTreeProcessor org.snt.inmemantlr.tree.ParseTreeProcessor used on opensource projects

Example 1 with ParseTreeProcessor

use of org.snt.inmemantlr.tree.ParseTreeProcessor in project inmemantlr by julianthome.

the class TestParseTreeProcessorEvaluation method testInterpreter.

@Test
public void testInterpreter() throws IOException {
    try (InputStream sgrammar = getClass().getClassLoader().getResourceAsStream("inmemantlr/Ops.g4")) {
        sgrammarcontent = FileUtils.getStringFromStream(sgrammar);
    }
    GenericParser gp = new GenericParser(sgrammarcontent);
    DefaultTreeListener t = new DefaultTreeListener();
    gp.setListener(t);
    boolean compile;
    try {
        gp.compile();
        compile = true;
    } catch (CompilationException e) {
        compile = false;
    }
    Assertions.assertTrue(compile);
    // this example shows you how one could use inmemantlr for incremental parsing
    try {
        ParseTree parseTree;
        gp.parse("3+100");
        parseTree = t.getParseTree();
        // Process the tree bottom up
        ParseTreeProcessor<String, String> processor = new ParseTreeProcessor<String, String>(parseTree) {

            @Override
            public String getResult() {
                return smap.get(this.parseTree.getRoot());
            }

            @Override
            protected void initialize() {
                this.parseTree.getNodes().forEach(n -> smap.put(n, n.getLabel()));
            }

            @Override
            protected void process(ParseTreeNode n) {
                LOGGER.debug("id " + n.getId());
                if (n.getRule().equals("expression")) {
                    int n0 = Integer.parseInt(smap.get(n.getChild(0)));
                    int n1 = Integer.parseInt(smap.get(n.getChild(2)));
                    int result = 0;
                    switch(smap.get(n.getChild(1))) {
                        case "+":
                            result = n0 + n1;
                            break;
                        case "-":
                            result = n0 - n1;
                            break;
                    }
                    smap.put(n, String.valueOf(result));
                } else
                    simpleProp(n);
            }
        };
        try {
            processor.process();
        } catch (ParseTreeProcessorException e) {
            Assertions.assertFalse(true);
        }
        Assertions.assertEquals(parseTree.getNodes().size(), 7);
        Assertions.assertEquals(processor.getResult(), "103");
    } catch (IllegalWorkflowException | ParsingException e) {
        LOGGER.error(e.getMessage(), e);
    }
}

Example 2 with ParseTreeProcessor

use of org.snt.inmemantlr.tree.ParseTreeProcessor in project inmemantlr by julianthome.

the class TestParseTreeProcessor method testProcessor.

@Test
public void testProcessor() {
    GenericParser gp = new GenericParser(sgrammarcontent);
    boolean compile;
    try {
        gp.compile();
        compile = true;
    } catch (CompilationException e) {
        compile = false;
    }
    Assertions.assertTrue(compile);
    Assertions.assertTrue(s != null && !s.isEmpty());
    DefaultTreeListener dlist = new DefaultTreeListener();
    gp.setListener(dlist);
    try {
        gp.parse(s);
    } catch (IllegalWorkflowException | ParsingException e) {
        Assertions.assertTrue(false);
    }
    ParseTree parseTree = dlist.getParseTree();
    // Process the tree bottom up
    ParseTreeProcessor<String, String> processor = new ParseTreeProcessor<String, String>(parseTree) {

        int cnt = 0;

        @Override
        public String getResult() {
            return String.valueOf(cnt);
        }

        @Override
        protected void initialize() {
            for (ParseTreeNode n : this.parseTree.getNodes()) {
                smap.put(n, "");
            }
        }

        @Override
        protected void process(ParseTreeNode n) {
            cnt++;
            simpleProp(n);
            Assertions.assertTrue(getElement(n) != null);
        }
    };
    try {
        processor.process();
    } catch (ParseTreeProcessorException e) {
        Assertions.assertFalse(true);
    }
    Assertions.assertTrue(processor.debug() != null);
}