Examples of org.antlr.runtime.tree.TreeWizard.visit()

org.antlr.runtime.tree.TreeWizard.visit()
Visit every ttype node in t, invoking the visitor. This is a quicker version of the general visit(t, pattern) method. The labels arg of the visitor action method is never set (it's null) since using a token type rather than a pattern doesn't let us set a label.


  @Test public void testVisitPatternMultiple() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A B) (D (A B)))");
    final List elements = new ArrayList();
    wiz.visit(t, "(A B)",
             new TreeWizard.ContextVisitor() {
               public void visit(Object t, Object parent, int childIndex, Map labels) {
                 elements.add(adaptor.getText(t)+"@"+
                      (parent!=null?adaptor.getText(parent):"nil")+
                      "["+childIndex+"]");

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  @Test public void testVisitPatternMultipleWithLabels() throws Exception {
    TreeWizard wiz = new TreeWizard(adaptor, tokens);
    CommonTree t = (CommonTree)wiz.create("(A B C (A[foo] B[bar]) (D (A[big] B[dog])))");
    final List elements = new ArrayList();
    wiz.visit(t, "(%a:A %b:B)",
             new TreeWizard.ContextVisitor() {
               public void visit(Object t, Object parent, int childIndex, Map labels) {
                 elements.add(adaptor.getText(t)+"@"+
                      (parent!=null?adaptor.getText(parent):"nil")+
                      "["+childIndex+"]"+labels.get("a")+"&"+labels.get("b"));

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    public void rewrite(TreeAdaptor adaptor, CommonTree t, String[] tokenNames) throws Exception {
        TreeWizard wiz = new TreeWizard(adaptor, tokenNames);


        // ACTIONS STUFF
        wiz.visit(t, ANTLRv3Parser.ACTION,
           new TreeWizard.Visitor() {
               public void visit(Object t) { ACTION(tokens, (CommonTree)t); }
           });


        wiz.visit(t, ANTLRv3Parser.AT,  // ^('@' id ACTION) rule actions

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        wiz.visit(t, ANTLRv3Parser.ACTION,
           new TreeWizard.Visitor() {
               public void visit(Object t) { ACTION(tokens, (CommonTree)t); }
           });


        wiz.visit(t, ANTLRv3Parser.AT,  // ^('@' id ACTION) rule actions
            new TreeWizard.Visitor() {
              public void visit(Object t) {
                  CommonTree a = (CommonTree)t;
                  CommonTree action = null;
                  if ( a.getChildCount()==2 ) action = (CommonTree)a.getChild(1);

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                                    a.getTokenStopIndex());
                      killTrailingNewline(tokens, action.getTokenStopIndex());
                  }
              }
            });
        wiz.visit(t, ANTLRv3Parser.ARG, // wipe rule arguments
                  new TreeWizard.Visitor() {
              public void visit(Object t) {
                  CommonTree a = (CommonTree)t;
                  a = (CommonTree)a.getChild(0);
                  tokens.delete(a.token.getTokenIndex());

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                  a = (CommonTree)a.getChild(0);
                  tokens.delete(a.token.getTokenIndex());
                  killTrailingNewline(tokens, a.token.getTokenIndex());
              }
            });
        wiz.visit(t, ANTLRv3Parser.RET, // wipe rule return declarations
            new TreeWizard.Visitor() {
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    CommonTree ret = (CommonTree)a.getChild(0);
                    tokens.delete(a.token.getTokenIndex(),

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                    CommonTree ret = (CommonTree)a.getChild(0);
                    tokens.delete(a.token.getTokenIndex(),
                                  ret.token.getTokenIndex());
                }
            });
        wiz.visit(t, ANTLRv3Parser.SEMPRED, // comment out semantic predicates
            new TreeWizard.Visitor() {
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    tokens.replace(a.token.getTokenIndex(), "/*"+a.getText()+"*/");
                }

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                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    tokens.replace(a.token.getTokenIndex(), "/*"+a.getText()+"*/");
                }
            });
        wiz.visit(t, ANTLRv3Parser.GATED_SEMPRED, // comment out semantic predicates
            new TreeWizard.Visitor() {
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    String text = tokens.toString(a.getTokenStartIndex(),
                                                  a.getTokenStopIndex());

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                    tokens.replace(a.getTokenStartIndex(),
                                   a.getTokenStopIndex(),
                                   "/*"+text+"*/");
                }
            });
        wiz.visit(t, ANTLRv3Parser.SCOPE, // comment scope specs
            new TreeWizard.Visitor() {
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    tokens.delete(a.getTokenStartIndex(),
                                  a.getTokenStopIndex());

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                    tokens.delete(a.getTokenStartIndex(),
                                  a.getTokenStopIndex());
                    killTrailingNewline(tokens, a.getTokenStopIndex());
                }
            });        
        wiz.visit(t, ANTLRv3Parser.ARG_ACTION, // args r[x,y] -> ^(r [x,y])
            new TreeWizard.Visitor() {
                public void visit(Object t) {
                    CommonTree a = (CommonTree)t;
                    if ( a.getParent().getType()==ANTLRv3Parser.RULE_REF ) {
                        tokens.delete(a.getTokenStartIndex(),

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