Examples of org.antlr.codegen.CodeGenerator

org.antlr.codegen.CodeGenerator
ANTLR's code generator. Generate recognizers derived from grammars. Language independence achieved through the use of STGroup objects. All output strings are completely encapsulated in the group files such as Java.stg. Some computations are done that are unused by a particular language. This generator just computes and sets the values into the templates; the templates are free to use or not use the information. To make a new code generation target, define X.stg for language X by copying from existing Y.stg most closely releated to your language; e.g., to do CSharp.stg copy Java.stg. The template group file has a bunch of templates that are needed by the code generator. You can add a new target w/o even recompiling ANTLR itself. The language=X option in a grammar file dictates which templates get loaded/used. Some language like C need both parser files and header files. Java needs to have a separate file for the cyclic DFA as ANTLR generates bytecodes directly (which cannot be in the generated parser Java file). To facilitate this, cyclic can be in same file, but header, output must be searpate. recognizer is in outptufile.

            adjustedColumn = getDecisionColumn(g = engine.getDiscoveredLexerGrammar());


        if(adjustedColumn == -1)
            throw new Exception("No decision in the current line");


        CodeGenerator generator = new CodeGenerator(new Tool(), g,
                (String) g.getOption("language"));


        DFA dfa = g.getLookaheadDFAFromPositionInFile(line, adjustedColumn);
        decisionNumber = dfa.getDecisionNumber();
        DOTGenerator dg = new DOTGenerator(g);

View Full Code Here

     *  root grammar.  DFA and code gen for delegates comes next.
     */
    protected void generateRecognizer(Grammar grammar) {
        String language = (String) grammar.getOption("language");
        if (language != null) {
            CodeGenerator generator = new CodeGenerator(this, grammar, language);
            grammar.setCodeGenerator(generator);
            generator.setDebug(isDebug());
            generator.setProfile(isProfile());
            generator.setTrace(isTrace());


            // generate NFA early in case of crash later (for debugging)
            if (isGenerate_NFA_dot()) {
                generateNFAs(grammar);
            }


            // GENERATE CODE
            generator.genRecognizer();


            if (isGenerate_DFA_dot()) {
                generateDFAs(grammar);
            }

View Full Code Here

  public LeftRecursiveRuleAnalyzer(TreeNodeStream input, Grammar g, String ruleName) {
    super(input);
    this.g = g;
    this.ruleName = ruleName;
    language = (String)g.getOption("language");
    generator = new CodeGenerator(g.tool, g, language);
    generator.loadTemplates(language);
    loadPrecRuleTemplates();
  }

View Full Code Here

            throws IOException {
        this.tool = tool;
        this.grammarFileName = grammarFileName;
        grammar = tool.getRootGrammar(grammarFileName);
        String language = (String) grammar.getOption("language");
        generator = new CodeGenerator(tool, grammar, language);
        generator.loadTemplates(language);
    }

View Full Code Here

      "b : B ;\n" +
      "B : 'b' ;\n";
    Grammar g = new Grammar(grammarStr);


    Tool antlr = newTool();
    CodeGenerator generator = new CodeGenerator(antlr, g, "Java");
    g.setCodeGenerator(generator);
    ST recogST = generator.genRecognizer();
    String code = recogST.render();
    assertTrue("not expecting label", code.indexOf("x=b();")<0);


    assertEquals("unexpected errors: "+equeue, 0, equeue.errors.size());
  }

View Full Code Here

      "    : 'y' ;" +
      "rule\n" +
      "    : other=otherrule {" + action +"}\n" +
      "    ;");
    Tool antlr = newTool();
    CodeGenerator generator = new CodeGenerator(antlr, g, "Java");
    g.setCodeGenerator(generator);
    generator.genRecognizer(); // forces load of templates
    ActionTranslator translator = new ActionTranslator(generator,
                                  "rule",
                                  new CommonToken(ANTLRParser.ACTION,action),1);
    String rawTranslation =
      translator.translate();

View Full Code Here

            "  ;\n";


        Grammar g = new Grammar(treeGrammar);
        Tool antlr = newTool();
        antlr.setOutputDirectory(null); // write to /dev/null
        CodeGenerator generator = new CodeGenerator(antlr, g, "Java");
        g.setCodeGenerator(generator);
        generator.genRecognizer();


        assertEquals("unexpected errors: "+equeue, 1, equeue.errors.size());


        int expectedMsgID = ErrorManager.MSG_WILDCARD_AS_ROOT;
        Object expectedArg = null;

View Full Code Here

  }


  @Test public void testEscapedLessThanInAction() throws Exception {
    Grammar g = new Grammar();
    Tool antlr = newTool();
    CodeGenerator generator = new CodeGenerator(antlr, g, "Java");
    String action = "i<3; '<xmltag>'";
    ActionTranslator translator = new ActionTranslator(generator,"a",
      new CommonToken(ANTLRParser.ACTION,action),0);
    String expecting = action;
    String rawTranslation =

View Full Code Here

        "@members {"+action+"}\n"+
        "a[User u, int i]\n" +
        "        : {"+action+"}\n" +
        "        ;");
    Tool antlr = newTool();
    CodeGenerator generator = new CodeGenerator(antlr, g, "Java");
    g.setCodeGenerator(generator);
    generator.genRecognizer(); // forces load of templates
    ActionTranslator translator =
      new ActionTranslator(generator,
        "a",
        new CommonToken(ANTLRParser.ACTION,action),0);
    String found = translator.translate();    assertEquals(expecting, found);

View Full Code Here

      "parser grammar t;\n"+
        "a[User u, int i]\n" +
        "        : {"+action+"}\n" +
        "        ;");
    Tool antlr = newTool();
    CodeGenerator generator = new CodeGenerator(antlr, g, "Java");
    g.setCodeGenerator(generator);
    generator.genRecognizer(); // forces load of templates
    ActionTranslator translator = new ActionTranslator(generator,"a",
      new CommonToken(ANTLRParser.ACTION,action),1);
    String found = translator.translate();    assertEquals(expecting, found);


    assertEquals("unexpected errors: "+equeue, 0, equeue.errors.size());

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of org.antlr.codegen.CodeGenerator

antlr.TokenStreamRewriteEngine

org.antlr.analysis.DFA

org.antlr.grammar.v3.ActionTranslator

org.antlr.grammar.v3.ANTLRLexer

org.antlr.grammar.v3.ANTLRParser

org.antlr.grammar.v3.CodeGenTreeWalker

org.antlr.misc.BitSet

org.antlr.runtime.tree.CommonTreeNodeStream

org.antlr.test.TestAttributes

org.antlr.test.TestCharDFAConversion

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.