Package org.antlr.v4.automata

Examples of org.antlr.v4.automata.TailEpsilonRemover

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    List<Grammar> imports = rootGrammar.getAllImportedGrammars();
    if ( imports==null ) return;

    GrammarAST root = rootGrammar.ast;
    GrammarAST id = (GrammarAST) root.getChild(0);
    GrammarASTAdaptor adaptor = new GrammarASTAdaptor(id.token.getInputStream());

     GrammarAST tokensRoot = (GrammarAST)root.getFirstChildWithType(ANTLRParser.TOKENS_SPEC);

    List<GrammarAST> actionRoots = root.getNodesWithType(ANTLRParser.AT);

    // Compute list of rules in root grammar and ensure we have a RULES node
    GrammarAST RULES = (GrammarAST)root.getFirstChildWithType(ANTLRParser.RULES);
    Set<String> rootRuleNames = new HashSet<String>();
    if ( RULES==null ) { // no rules in root, make RULES node, hook in
      RULES = (GrammarAST)adaptor.create(ANTLRParser.RULES, "RULES");
      RULES.g = rootGrammar;
      root.addChild(RULES);
    }
    else {
      // make list of rules we have in root grammar
      List<GrammarAST> rootRules = RULES.getNodesWithType(ANTLRParser.RULE);
      for (GrammarAST r : rootRules) rootRuleNames.add(r.getChild(0).getText());
    }

    for (Grammar imp : imports) {
      // COPY TOKENS
      GrammarAST imp_tokensRoot = (GrammarAST)imp.ast.getFirstChildWithType(ANTLRParser.TOKENS_SPEC);
      if ( imp_tokensRoot!=null ) {
        rootGrammar.tool.log("grammar", "imported tokens: "+imp_tokensRoot.getChildren());
        if ( tokensRoot==null ) {
          tokensRoot = (GrammarAST)adaptor.create(ANTLRParser.TOKENS_SPEC, "TOKENS");
          tokensRoot.g = rootGrammar;
          root.insertChild(1, tokensRoot); // ^(GRAMMAR ID TOKENS...)
        }
        tokensRoot.addChildren(Arrays.asList(imp_tokensRoot.getChildren().toArray(new Tree[0])));
      }
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   *                adding to lexer to avoid "who's ur daddy" issues
   */
  public GrammarRootAST extractImplicitLexer(Grammar combinedGrammar) {
    GrammarRootAST combinedAST = combinedGrammar.ast;
    //tool.log("grammar", "before="+combinedAST.toStringTree());
    GrammarASTAdaptor adaptor = new GrammarASTAdaptor(combinedAST.token.getInputStream());
    GrammarAST[] elements = combinedAST.getChildren().toArray(new GrammarAST[0]);

    // MAKE A GRAMMAR ROOT and ID
    String lexerName = combinedAST.getChild(0).getText()+"Lexer";
    GrammarRootAST lexerAST =
        new GrammarRootAST(new CommonToken(ANTLRParser.GRAMMAR, "LEXER_GRAMMAR"), combinedGrammar.ast.tokenStream);
    lexerAST.grammarType = ANTLRParser.LEXER;
    lexerAST.token.setInputStream(combinedAST.token.getInputStream());
    lexerAST.addChild((GrammarAST)adaptor.create(ANTLRParser.ID, lexerName));

    // COPY OPTIONS
    GrammarAST optionsRoot =
      (GrammarAST)combinedAST.getFirstChildWithType(ANTLRParser.OPTIONS);
    if ( optionsRoot!=null && optionsRoot.getChildCount()!=0 ) {
      GrammarAST lexerOptionsRoot = (GrammarAST)adaptor.dupNode(optionsRoot);
      lexerAST.addChild(lexerOptionsRoot);
      GrammarAST[] options = optionsRoot.getChildren().toArray(new GrammarAST[0]);
      for (GrammarAST o : options) {
        String optionName = o.getChild(0).getText();
        if ( Grammar.lexerOptions.contains(optionName) &&
           !Grammar.doNotCopyOptionsToLexer.contains(optionName) )
        {
          GrammarAST optionTree = (GrammarAST)adaptor.dupTree(o);
          lexerOptionsRoot.addChild(optionTree);
          lexerAST.setOption(optionName, (GrammarAST)optionTree.getChild(1));
        }
      }
    }

    // COPY all named actions, but only move those with lexer:: scope
    List<GrammarAST> actionsWeMoved = new ArrayList<GrammarAST>();
    for (GrammarAST e : elements) {
      if ( e.getType()==ANTLRParser.AT ) {
        lexerAST.addChild((Tree)adaptor.dupTree(e));
        if ( e.getChild(0).getText().equals("lexer") ) {
          actionsWeMoved.add(e);
        }
      }
    }

    for (GrammarAST r : actionsWeMoved) {
      combinedAST.deleteChild( r );
    }

    GrammarAST combinedRulesRoot =
      (GrammarAST)combinedAST.getFirstChildWithType(ANTLRParser.RULES);
    if ( combinedRulesRoot==null ) return lexerAST;

    // MOVE lexer rules

    GrammarAST lexerRulesRoot =
      (GrammarAST)adaptor.create(ANTLRParser.RULES, "RULES");
    lexerAST.addChild(lexerRulesRoot);
    List<GrammarAST> rulesWeMoved = new ArrayList<GrammarAST>();
    GrammarASTWithOptions[] rules;
    if (combinedRulesRoot.getChildCount() > 0) {
      rules = combinedRulesRoot.getChildren().toArray(new GrammarASTWithOptions[0]);
    }
    else {
      rules = new GrammarASTWithOptions[0];
    }

    for (GrammarASTWithOptions r : rules) {
      String ruleName = r.getChild(0).getText();
      if (Grammar.isTokenName(ruleName)) {
        lexerRulesRoot.addChild((Tree)adaptor.dupTree(r));
        rulesWeMoved.add(r);
      }
    }
    for (GrammarAST r : rulesWeMoved) {
      combinedRulesRoot.deleteChild( r );
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    ClassUtils cu = new ClassUtils();
    setup(cu);
    registry.clearForType(JavaCompletionTypes.CUSTOM_TYPE);
    registry.clearForType(JavaCompletionTypes.FIELD);
    registry.clearForType(JavaCompletionTypes.NAME);
    Lexer lexer = new JavaLexer(new ANTLRInputStream(txt));
    CommonTokenStream tokens = new CommonTokenStream(lexer);

    // Create a parser that reads from the scanner
    JavaParser parser = new JavaParser(tokens);
    parser.removeErrorListeners();
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  @Test
  public void Process() throws IOException {
    InputStream is = CheckSymbols.class.getResource("/Mson.js")
        .openStream();
    ANTLRInputStream input = new ANTLRInputStream(is);
    MsonLexer lexer = new MsonLexer(input);
//    SymbolASTFactory factory = new SymbolASTFactory();
//    lexer.setTokenFactory(factory);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
   
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    setup(cu);
    registry.clearForType(JavaCompletionTypes.CUSTOM_TYPE);
    registry.clearForType(JavaCompletionTypes.FIELD);
    registry.clearForType(JavaCompletionTypes.NAME);
    Lexer lexer = new JavaLexer(new ANTLRInputStream(txt));
    CommonTokenStream tokens = new CommonTokenStream(lexer);

    // Create a parser that reads from the scanner
    JavaParser parser = new JavaParser(tokens);
    parser.removeErrorListeners();
   
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        .openStream();
    ANTLRInputStream input = new ANTLRInputStream(is);
    MsonLexer lexer = new MsonLexer(input);
//    SymbolASTFactory factory = new SymbolASTFactory();
//    lexer.setTokenFactory(factory);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
   
    MsonParser parser = new MsonParser(tokens);
//    parser.setTokenFactory(factory);
    parser.addErrorListener(new DiagnosticErrorListener());
    parser.getInterpreter().setPredictionMode(
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//    lexer.setTokenFactory(factory);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
   
    MsonParser parser = new MsonParser(tokens);
//    parser.setTokenFactory(factory);
    parser.addErrorListener(new DiagnosticErrorListener());
    parser.getInterpreter().setPredictionMode(
        PredictionMode.LL_EXACT_AMBIG_DETECTION);
    parser.setBuildParseTree(true);
    ParseTree tree = parser.mson();
    // show tree in text form
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    ClassUtils cu = new ClassUtils();
    setup(cu);
    registry.clearForType(JavaCompletionTypes.CUSTOM_TYPE);
    registry.clearForType(JavaCompletionTypes.FIELD);
    registry.clearForType(JavaCompletionTypes.NAME);
    Lexer lexer = new JavaLexer(new ANTLRInputStream(txt));
    CommonTokenStream tokens = new CommonTokenStream(lexer);

    // Create a parser that reads from the scanner
    JavaParser parser = new JavaParser(tokens);
    parser.removeErrorListeners();
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    // Create a parser that reads from the scanner
    JavaParser parser = new JavaParser(tokens);
    parser.removeErrorListeners();
   
    // start parsing at the compilationUnit rule
    ParserRuleContext t = parser.compilationUnit();
    ParseTreeWalker walker = new ParseTreeWalker();
    List<AutocompleteCandidate> q = new ArrayList<AutocompleteCandidate>();
         
    ImportDeclarationCompletion extractor = new ImportDeclarationCompletion(txt,cur,registry,cps,cu);
    NameBuilder extractor2 = new NameBuilder(registry,cu );
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    isKeywords = false;
  }

  @Override
  public void enterPackage(@NotNull PackageContext ctx) {
    ParserRuleContext prc = ctx.getParent();
    if (!(prc instanceof DomainArrayContext)) {
      return;
    }
    DomainArrayContext dac = (DomainArrayContext) prc;
    DomainHeaderContext dhctx = (DomainHeaderContext) dac.getChild(0);
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Related Classes of org.antlr.v4.automata.TailEpsilonRemover

  • org.antlr.runtime.ANTLRFileStream
  • org.antlr.runtime.ANTLRStringStream
  • org.antlr.runtime.CharStream
  • org.antlr.runtime.CommonToken
  • org.antlr.runtime.Token
  • org.antlr.runtime.tree.CommonTree
  • org.antlr.runtime.tree.CommonTreeNodeStream
  • org.antlr.runtime.tree.Tree
  • org.antlr.runtime.tree.TreeVisitor
  • org.antlr.runtime.tree.TreeVisitorAction
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