From 720a8f250b8278fb604c2e6fecc33f9f16481dcb Mon Sep 17 00:00:00 2001
From: develar <develop@gmail.com>
Date: Sun, 30 Sep 2012 17:18:51 +0400
Subject: [PATCH] KT-2864

---
 .../js/JsToStringGenerationVisitor.java       |  87 +-
 .../compiler/backend/js/ast/JsDocComment.java |  48 +-
 .../compiler/backend/js/ast/JsVisitor.java    | 770 +++++++++---------
 3 files changed, 500 insertions(+), 405 deletions(-)

diff --git a/src/com/google/dart/compiler/backend/js/JsToStringGenerationVisitor.java b/src/com/google/dart/compiler/backend/js/JsToStringGenerationVisitor.java
index 49b0c2bd610..62905cb51db 100644
--- a/src/com/google/dart/compiler/backend/js/JsToStringGenerationVisitor.java
+++ b/src/com/google/dart/compiler/backend/js/JsToStringGenerationVisitor.java
@@ -222,11 +222,11 @@ public class JsToStringGenerationVisitor extends JsVisitor {
     }
 
     private void printExpressions(List<JsExpression> expressions) {
-        boolean sep = false;
-        for (JsExpression arg : expressions) {
-            sep = sepCommaOptSpace(sep);
-            boolean isEnclosed = parenPushIfCommaExpression(arg);
-            accept(arg);
+        boolean notFirst = false;
+        for (JsExpression expression : expressions) {
+            notFirst = sepCommaOptSpace(notFirst) && !(expression instanceof JsDocComment);
+            boolean isEnclosed = parenPushIfCommaExpression(expression);
+            accept(expression);
             if (isEnclosed) {
                 rightParen();
             }
@@ -556,10 +556,10 @@ public class JsToStringGenerationVisitor extends JsVisitor {
         }
 
         leftParen();
-        boolean sep = false;
+        boolean notFirst = false;
         for (Object element : x.getParameters()) {
             JsParameter param = (JsParameter) element;
-            sep = sepCommaOptSpace(sep);
+            notFirst = sepCommaOptSpace(notFirst);
             accept(param);
         }
         rightParen();
@@ -610,8 +610,7 @@ public class JsToStringGenerationVisitor extends JsVisitor {
 
     @Override
     public boolean visit(JsInvocation x, JsContext ctx) {
-        JsExpression qualifier = x.getQualifier();
-        printPair(x, qualifier);
+        printPair(x, x.getQualifier());
 
         leftParen();
         printExpressions(x.getArguments());
@@ -697,20 +696,20 @@ public class JsToStringGenerationVisitor extends JsVisitor {
             p.indentIn();
         }
 
-        boolean isNotFirst = false;
+        boolean notFirst = false;
         for (JsPropertyInitializer item : objectLiteral.getPropertyInitializers()) {
-            if (isNotFirst) {
+            if (notFirst) {
                 p.print(',');
             }
 
             if (objectLiteral.isMultiline()) {
                 newlineOpt();
             }
-            else if (isNotFirst) {
+            else if (notFirst) {
                 spaceOpt();
             }
 
-            isNotFirst = true;
+            notFirst = true;
 
             JsExpression labelExpr = item.getLabelExpr();
             // labels can be either string, integral, or decimal literals
@@ -907,7 +906,65 @@ public class JsToStringGenerationVisitor extends JsVisitor {
         return false;
     }
 
-    protected void _newline() {
+    @Override
+    public boolean visit(JsDocComment comment, JsContext context) {
+        boolean asSingleLine = comment.getTags().size() == 1;
+        if (!asSingleLine) {
+            newlineOpt();
+        }
+        p.print("/**");
+        if (asSingleLine) {
+            space();
+        }
+        else {
+            newline();
+        }
+
+        boolean notFirst = false;
+        for (Map.Entry<String, Object> entry : comment.getTags().entrySet()) {
+            if (notFirst) {
+                newline();
+                p.print(' ');
+                p.print('*');
+            }
+            else {
+                notFirst = true;
+            }
+
+            p.print('@');
+            p.print(entry.getKey());
+            Object value = entry.getValue();
+            if (value != null) {
+                space();
+                if (value instanceof CharSequence) {
+                    p.print((CharSequence) value);
+                }
+                else {
+                    visit((JsNameRef) value, context);
+                }
+            }
+
+            if (!asSingleLine) {
+                newline();
+            }
+        }
+
+        if (asSingleLine) {
+            space();
+        }
+        else {
+            newlineOpt();
+        }
+
+        p.print('*');
+        p.print('/');
+        if (asSingleLine) {
+            spaceOpt();
+        }
+        return false;
+    }
+
+    protected void newline() {
         p.newline();
     }
 
@@ -977,7 +1034,7 @@ public class JsToStringGenerationVisitor extends JsVisitor {
                         newlineOpt();
                     }
                     else {
-                        _newline();
+                        newline();
                     }
                 }
                 else {
diff --git a/src/com/google/dart/compiler/backend/js/ast/JsDocComment.java b/src/com/google/dart/compiler/backend/js/ast/JsDocComment.java
index e66ea3eb2f0..ffc8867edae 100644
--- a/src/com/google/dart/compiler/backend/js/ast/JsDocComment.java
+++ b/src/com/google/dart/compiler/backend/js/ast/JsDocComment.java
@@ -1,13 +1,49 @@
 package com.google.dart.compiler.backend.js.ast;
 
-public class JsDocComment extends JsNodeImpl implements JsStatement {
-    @Override
-    public NodeKind getKind() {
-        return null;  //To change body of implemented methods use File | Settings | File Templates.
+import java.util.Collections;
+import java.util.Map;
+
+public class JsDocComment extends JsExpressionImpl implements JsExpression {
+    private final Map<String, Object> tags;
+
+    public JsDocComment(Map<String, Object> tags) {
+        this.tags = tags;
+    }
+
+    public Map<String, Object> getTags() {
+        return tags;
+    }
+
+    public JsDocComment(String tagName, JsNameRef tagValue) {
+        tags = Collections.<String, Object>singletonMap(tagName, tagValue);
+    }
+
+    public JsDocComment(String tagName, String tagValue) {
+        tags = Collections.<String, Object>singletonMap(tagName, tagValue);
     }
 
     @Override
-    public void traverse(JsVisitor visitor, JsContext context) {
-        //To change body of implemented methods use File | Settings | File Templates.
+    public NodeKind getKind() {
+        throw new UnsupportedOperationException();
+    }
+
+    @Override
+    public void traverse(JsVisitor v, JsContext context) {
+        v.visit(this, context);
+    }
+
+    @Override
+    public boolean hasSideEffects() {
+        return false;
+    }
+
+    @Override
+    public boolean isDefinitelyNotNull() {
+        return true;
+    }
+
+    @Override
+    public boolean isDefinitelyNull() {
+        return false;
     }
 }
diff --git a/src/com/google/dart/compiler/backend/js/ast/JsVisitor.java b/src/com/google/dart/compiler/backend/js/ast/JsVisitor.java
index 814ae92385b..a7575cf0766 100644
--- a/src/com/google/dart/compiler/backend/js/ast/JsVisitor.java
+++ b/src/com/google/dart/compiler/backend/js/ast/JsVisitor.java
@@ -12,420 +12,422 @@ import java.util.List;
  * Implemented by nodes that will visit child nodes.
  */
 public class JsVisitor {
+    protected static final JsContext LVALUE_CONTEXT = new JsContext() {
+        @Override
+        public boolean canInsert() {
+            return false;
+        }
 
-  protected static final JsContext LVALUE_CONTEXT = new JsContext() {
+        @Override
+        public boolean canRemove() {
+            return false;
+        }
 
-    @Override
-    public boolean canInsert() {
-      return false;
+        @Override
+        public void insertAfter(JsVisitable node) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void insertBefore(JsVisitable node) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public boolean isLvalue() {
+            return true;
+        }
+
+        @Override
+        public void removeMe() {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void replaceMe(JsVisitable node) {
+            throw new UnsupportedOperationException();
+        }
+    };
+
+    protected static final JsContext UNMODIFIABLE_CONTEXT = new JsContext() {
+
+        @Override
+        public boolean canInsert() {
+            return false;
+        }
+
+        @Override
+        public boolean canRemove() {
+            return false;
+        }
+
+        @Override
+        public void insertAfter(JsVisitable node) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void insertBefore(JsVisitable node) {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public boolean isLvalue() {
+            return false;
+        }
+
+        @Override
+        public void removeMe() {
+            throw new UnsupportedOperationException();
+        }
+
+        @Override
+        public void replaceMe(JsVisitable node) {
+            throw new UnsupportedOperationException();
+        }
+    };
+
+    public final <T extends JsVisitable> T accept(T node) {
+        return doAccept(node);
     }
 
-    @Override
-    public boolean canRemove() {
-      return false;
+    public final <T extends JsVisitable> void acceptList(List<T> collection) {
+        doAcceptList(collection);
     }
 
-    @Override
-    public void insertAfter(JsVisitable node) {
-      throw new UnsupportedOperationException();
+    public JsExpression acceptLvalue(JsExpression expr) {
+        return doAcceptLvalue(expr);
     }
 
-    @Override
-    public void insertBefore(JsVisitable node) {
-      throw new UnsupportedOperationException();
+    public final <T extends JsVisitable> void acceptWithInsertRemove(List<T> collection) {
+        doAcceptWithInsertRemove(collection);
     }
 
-    @Override
-    public boolean isLvalue() {
-      return true;
+    public void endVisit(JsArrayAccess x, JsContext ctx) {
     }
 
-    @Override
-    public void removeMe() {
-      throw new UnsupportedOperationException();
+    public void endVisit(JsArrayLiteral x, JsContext ctx) {
     }
 
-    @Override
-    public void replaceMe(JsVisitable node) {
-      throw new UnsupportedOperationException();
-    }
-  };
-
-  protected static final JsContext UNMODIFIABLE_CONTEXT = new JsContext() {
-
-    @Override
-    public boolean canInsert() {
-      return false;
+    public void endVisit(JsBinaryOperation x, JsContext ctx) {
     }
 
-    @Override
-    public boolean canRemove() {
-      return false;
+    public void endVisit(JsBlock x, JsContext ctx) {
     }
 
-    @Override
-    public void insertAfter(JsVisitable node) {
-      throw new UnsupportedOperationException();
+    public void endVisit(JsLiteral.JsBooleanLiteral x, JsContext ctx) {
     }
 
-    @Override
-    public void insertBefore(JsVisitable node) {
-      throw new UnsupportedOperationException();
+    public void endVisit(JsBreak x, JsContext ctx) {
     }
 
-    @Override
-    public boolean isLvalue() {
-      return false;
+    public void endVisit(JsCase x, JsContext ctx) {
     }
 
-    @Override
-    public void removeMe() {
-      throw new UnsupportedOperationException();
+    public void endVisit(JsCatch x, JsContext ctx) {
     }
 
-    @Override
-    public void replaceMe(JsVisitable node) {
-      throw new UnsupportedOperationException();
+    public void endVisit(JsConditional x, JsContext ctx) {
     }
-  };
 
-  public final <T extends JsVisitable> T accept(T node) {
-    return doAccept(node);
-  }
-
-  public final <T extends JsVisitable> void acceptList(List<T> collection) {
-    doAcceptList(collection);
-  }
-
-  public JsExpression acceptLvalue(JsExpression expr) {
-    return doAcceptLvalue(expr);
-  }
-
-  public final <T extends JsVisitable> void acceptWithInsertRemove(List<T> collection) {
-    doAcceptWithInsertRemove(collection);
-  }
-
-  public void endVisit(JsArrayAccess x, JsContext ctx) {
-  }
-
-  public void endVisit(JsArrayLiteral x, JsContext ctx) {
-  }
-
-  public void endVisit(JsBinaryOperation x, JsContext ctx) {
-  }
-
-  public void endVisit(JsBlock x, JsContext ctx) {
-  }
-
-  public void endVisit(JsLiteral.JsBooleanLiteral x, JsContext ctx) {
-  }
-
-  public void endVisit(JsBreak x, JsContext ctx) {
-  }
-
-  public void endVisit(JsCase x, JsContext ctx) {
-  }
-
-  public void endVisit(JsCatch x, JsContext ctx) {
-  }
-
-  public void endVisit(JsConditional x, JsContext ctx) {
-  }
-
-  public void endVisit(JsContinue x, JsContext ctx) {
-  }
-
-  public void endVisit(JsDebugger x, JsContext ctx) {
-  }
-
-  public void endVisit(JsDefault x, JsContext ctx) {
-  }
-
-  public void endVisit(JsDoWhile x, JsContext ctx) {
-  }
-
-  public void endVisit(JsEmpty x, JsContext ctx) {
-  }
-
-  public void endVisit(JsExprStmt x, JsContext ctx) {
-  }
-
-  public void endVisit(JsFor x, JsContext ctx) {
-  }
-
-  public void endVisit(JsForIn x, JsContext ctx) {
-  }
-
-  public void endVisit(JsFunction x, JsContext ctx) {
-  }
-
-  public void endVisit(JsIf x, JsContext ctx) {
-  }
-
-  public void endVisit(JsInvocation x, JsContext ctx) {
-  }
-
-  public void endVisit(JsLabel x, JsContext ctx) {
-  }
-
-  public void endVisit(JsNameRef x, JsContext ctx) {
-  }
-
-  public void endVisit(JsNew x, JsContext ctx) {
-  }
-
-  public void endVisit(JsNullLiteral x, JsContext ctx) {
-  }
-
-  public void endVisit(JsNumberLiteral x, JsContext ctx) {
-  }
-
-  public void endVisit(JsObjectLiteral x, JsContext ctx) {
-  }
-
-  public void endVisit(JsParameter x, JsContext ctx) {
-  }
-
-  public void endVisit(JsPostfixOperation x, JsContext ctx) {
-  }
-
-  public void endVisit(JsPrefixOperation x, JsContext ctx) {
-  }
-
-  public void endVisit(JsProgram x, JsContext ctx) {
-  }
-
-  public void endVisit(JsProgramFragment x, JsContext ctx) {
-  }
-
-  public void endVisit(JsPropertyInitializer x, JsContext ctx) {
-  }
-
-  public void endVisit(JsRegExp x, JsContext ctx) {
-  }
-
-  public void endVisit(JsReturn x, JsContext ctx) {
-  }
-
-  public void endVisit(JsStringLiteral x, JsContext ctx) {
-  }
-
-  public void endVisit(JsSwitch x, JsContext ctx) {
-  }
-
-  public void endVisit(JsLiteral.JsThisRef x, JsContext ctx) {
-  }
-
-  public void endVisit(JsThrow x, JsContext ctx) {
-  }
-
-  public void endVisit(JsTry x, JsContext ctx) {
-  }
-
-  public void endVisit(JsVar x, JsContext ctx) {
-  }
-
-  public void endVisit(JsVars x, JsContext ctx) {
-  }
-
-  public void endVisit(JsWhile x, JsContext ctx) {
-  }
-
-  public boolean visit(JsArrayAccess x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsArrayLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsBinaryOperation x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsBlock x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsLiteral.JsBooleanLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsBreak x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsCase x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsCatch x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsConditional x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsContinue x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsDebugger x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsDefault x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsDoWhile x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsEmpty x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsExprStmt x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsFor x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsForIn x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsFunction x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsIf x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsInvocation x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsLabel x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsNameRef x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsNew x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsNullLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsNumberLiteral.JsIntLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsNumberLiteral.JsDoubleLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsObjectLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsParameter x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsPostfixOperation x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsPrefixOperation x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsProgram x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsProgramFragment x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsPropertyInitializer x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsRegExp x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsReturn x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsStringLiteral x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsSwitch x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsLiteral.JsThisRef x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsThrow x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsTry x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsVar x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsVars x, JsContext ctx) {
-    return true;
-  }
-
-  public boolean visit(JsWhile x, JsContext ctx) {
-    return true;
-  }
-
-  protected <T extends JsVisitable> T doAccept(T node) {
-    doTraverse(node, UNMODIFIABLE_CONTEXT);
-    return node;
-  }
-
-  protected <T extends JsVisitable> void doAcceptList(List<T> collection) {
-    for (T node : collection) {
-      doTraverse(node, UNMODIFIABLE_CONTEXT);
+    public void endVisit(JsContinue x, JsContext ctx) {
     }
-  }
 
-  protected JsExpression doAcceptLvalue(JsExpression expr) {
-    doTraverse(expr, LVALUE_CONTEXT);
-    return expr;
-  }
-
-  protected <T extends JsVisitable> void doAcceptWithInsertRemove(List<T> collection) {
-    for (T node : collection) {
-      doTraverse(node, UNMODIFIABLE_CONTEXT);
+    public void endVisit(JsDebugger x, JsContext ctx) {
     }
-  }
 
-  protected void doTraverse(JsVisitable node, JsContext ctx) {
-    node.traverse(this, ctx);
-  }
+    public void endVisit(JsDefault x, JsContext ctx) {
+    }
+
+    public void endVisit(JsDoWhile x, JsContext ctx) {
+    }
+
+    public void endVisit(JsEmpty x, JsContext ctx) {
+    }
+
+    public void endVisit(JsExprStmt x, JsContext ctx) {
+    }
+
+    public void endVisit(JsFor x, JsContext ctx) {
+    }
+
+    public void endVisit(JsForIn x, JsContext ctx) {
+    }
+
+    public void endVisit(JsFunction x, JsContext ctx) {
+    }
+
+    public void endVisit(JsIf x, JsContext ctx) {
+    }
+
+    public void endVisit(JsInvocation x, JsContext ctx) {
+    }
+
+    public void endVisit(JsLabel x, JsContext ctx) {
+    }
+
+    public void endVisit(JsNameRef x, JsContext ctx) {
+    }
+
+    public void endVisit(JsNew x, JsContext ctx) {
+    }
+
+    public void endVisit(JsNullLiteral x, JsContext ctx) {
+    }
+
+    public void endVisit(JsNumberLiteral x, JsContext ctx) {
+    }
+
+    public void endVisit(JsObjectLiteral x, JsContext ctx) {
+    }
+
+    public void endVisit(JsParameter x, JsContext ctx) {
+    }
+
+    public void endVisit(JsPostfixOperation x, JsContext ctx) {
+    }
+
+    public void endVisit(JsPrefixOperation x, JsContext ctx) {
+    }
+
+    public void endVisit(JsProgram x, JsContext ctx) {
+    }
+
+    public void endVisit(JsProgramFragment x, JsContext ctx) {
+    }
+
+    public void endVisit(JsPropertyInitializer x, JsContext ctx) {
+    }
+
+    public void endVisit(JsRegExp x, JsContext ctx) {
+    }
+
+    public void endVisit(JsReturn x, JsContext ctx) {
+    }
+
+    public void endVisit(JsStringLiteral x, JsContext ctx) {
+    }
+
+    public void endVisit(JsSwitch x, JsContext ctx) {
+    }
+
+    public void endVisit(JsLiteral.JsThisRef x, JsContext ctx) {
+    }
+
+    public void endVisit(JsThrow x, JsContext ctx) {
+    }
+
+    public void endVisit(JsTry x, JsContext ctx) {
+    }
+
+    public void endVisit(JsVar x, JsContext ctx) {
+    }
+
+    public void endVisit(JsVars x, JsContext ctx) {
+    }
+
+    public void endVisit(JsWhile x, JsContext ctx) {
+    }
+
+    public boolean visit(JsArrayAccess x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsArrayLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsBinaryOperation x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsBlock x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsLiteral.JsBooleanLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsBreak x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsCase x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsCatch x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsConditional x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsContinue x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsDebugger x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsDefault x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsDoWhile x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsEmpty x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsExprStmt x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsFor x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsForIn x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsFunction x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsIf x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsInvocation x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsLabel x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsNameRef x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsNew x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsNullLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsNumberLiteral.JsIntLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsNumberLiteral.JsDoubleLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsObjectLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsParameter x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsPostfixOperation x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsPrefixOperation x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsProgram x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsProgramFragment x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsPropertyInitializer x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsRegExp x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsReturn x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsStringLiteral x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsSwitch x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsLiteral.JsThisRef x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsThrow x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsTry x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsVar x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsVars x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsWhile x, JsContext ctx) {
+        return true;
+    }
+
+    public boolean visit(JsDocComment x, JsContext context) {
+        return true;
+    }
+
+    protected <T extends JsVisitable> T doAccept(T node) {
+        doTraverse(node, UNMODIFIABLE_CONTEXT);
+        return node;
+    }
+
+    protected <T extends JsVisitable> void doAcceptList(List<T> collection) {
+        for (T node : collection) {
+            doTraverse(node, UNMODIFIABLE_CONTEXT);
+        }
+    }
+
+    protected JsExpression doAcceptLvalue(JsExpression expr) {
+        doTraverse(expr, LVALUE_CONTEXT);
+        return expr;
+    }
+
+    protected <T extends JsVisitable> void doAcceptWithInsertRemove(List<T> collection) {
+        for (T node : collection) {
+            doTraverse(node, UNMODIFIABLE_CONTEXT);
+        }
+    }
+
+    protected void doTraverse(JsVisitable node, JsContext ctx) {
+        node.traverse(this, ctx);
+    }
 }