Change the overly-general class named Node to the more specific

AstNode in case we ever want to have some other kind of node.

Split the NODE_LIST macro-generating macro so that we can iterate
concrete subclasses of Statement and concrete subclasses of Expression
separately.
Review URL: http://codereview.chromium.org/159632

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@2586 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/arm/codegen-arm.h

@@ -374,7 +374,7 @@ class CodeGenerator: public AstVisitor {
   // information.
   void CodeForFunctionPosition(FunctionLiteral* fun);
   void CodeForReturnPosition(FunctionLiteral* fun);
-  void CodeForStatementPosition(Node* node);
+  void CodeForStatementPosition(AstNode* node);
   void CodeForSourcePosition(int pos);
 
 #ifdef DEBUG

src/ast.h

@@ -53,9 +53,8 @@ namespace internal {
 // Nodes of the abstract syntax tree. Only concrete classes are
 // enumerated here.
 
-#define NODE_LIST(V)                            \
+#define STATEMENT_NODE_LIST(V)                  \
   V(Block)                                      \
-  V(Declaration)                                \
   V(ExpressionStatement)                        \
   V(EmptyStatement)                             \
   V(IfStatement)                                \
@@ -69,7 +68,9 @@ namespace internal {
   V(ForInStatement)                             \
   V(TryCatch)                                   \
   V(TryFinally)                                 \
-  V(DebuggerStatement)                          \
+  V(DebuggerStatement)
+
+#define EXPRESSION_NODE_LIST(V)                 \
   V(FunctionLiteral)                            \
   V(FunctionBoilerplateLiteral)                 \
   V(Conditional)                                \
@@ -93,6 +94,10 @@ namespace internal {
   V(CompareOperation)                           \
   V(ThisFunction)
 
+#define AST_NODE_LIST(V)                        \
+  V(Declaration)                                \
+  STATEMENT_NODE_LIST(V)                        \
+  EXPRESSION_NODE_LIST(V)
 
 // Forward declarations
 class TargetCollector;
@@ -108,10 +113,10 @@ NODE_LIST(DEF_FORWARD_DECLARATION)
 typedef ZoneList<Handle<String> > ZoneStringList;
 
 
-class Node: public ZoneObject {
+class AstNode: public ZoneObject {
  public:
-  Node(): statement_pos_(RelocInfo::kNoPosition) { }
-  virtual ~Node() { }
+  AstNode(): statement_pos_(RelocInfo::kNoPosition) { }
+  virtual ~AstNode() { }
   virtual void Accept(AstVisitor* v) = 0;
 
   // Type testing & conversion.
@@ -143,7 +148,7 @@ class Node: public ZoneObject {
 };
 
 
-class Statement: public Node {
+class Statement: public AstNode {
  public:
   virtual Statement* AsStatement()  { return this; }
   virtual ReturnStatement* AsReturnStatement() { return NULL; }
@@ -152,7 +157,7 @@ class Statement: public Node {
 };
 
 
-class Expression: public Node {
+class Expression: public AstNode {
  public:
   virtual Expression* AsExpression()  { return this; }
 
@@ -240,7 +245,7 @@ class Block: public BreakableStatement {
 };
 
 
-class Declaration: public Node {
+class Declaration: public AstNode {
  public:
   Declaration(VariableProxy* proxy, Variable::Mode mode, FunctionLiteral* fun)
       : proxy_(proxy),
@@ -523,7 +528,7 @@ class IfStatement: public Statement {
 
 // NOTE: TargetCollectors are represented as nodes to fit in the target
 // stack in the compiler; this should probably be reworked.
-class TargetCollector: public Node {
+class TargetCollector: public AstNode {
  public:
   explicit TargetCollector(ZoneList<BreakTarget*>* targets)
       : targets_(targets) {
@@ -1678,7 +1683,7 @@ class AstVisitor BASE_EMBEDDED {
   virtual ~AstVisitor() { }
 
   // Dispatch
-  void Visit(Node* node) { node->Accept(this); }
+  void Visit(AstNode* node) { node->Accept(this); }
 
   // Iteration
   virtual void VisitStatements(ZoneList<Statement*>* statements);

src/codegen.cc

@@ -496,7 +496,7 @@ void CodeGenerator::CodeForReturnPosition(FunctionLiteral* fun) {
 }
 
 
-void CodeGenerator::CodeForStatementPosition(Node* node) {
+void CodeGenerator::CodeForStatementPosition(AstNode* node) {
   if (FLAG_debug_info) {
     int pos = node->statement_pos();
     if (pos != RelocInfo::kNoPosition) {

src/ia32/codegen-ia32.h

@@ -558,7 +558,7 @@ class CodeGenerator: public AstVisitor {
   // information.
   void CodeForFunctionPosition(FunctionLiteral* fun);
   void CodeForReturnPosition(FunctionLiteral* fun);
-  void CodeForStatementPosition(Node* node);
+  void CodeForStatementPosition(AstNode* node);
   void CodeForSourcePosition(int pos);
 
 #ifdef DEBUG

src/parser.cc

@@ -1059,7 +1059,7 @@ VariableProxy* PreParser::Declare(Handle<String> name, Variable::Mode mode,
 
 class Target BASE_EMBEDDED {
  public:
-  Target(Parser* parser, Node* node)
+  Target(Parser* parser, AstNode* node)
       : parser_(parser), node_(node), previous_(parser_->target_stack_) {
     parser_->target_stack_ = this;
   }
@@ -1069,11 +1069,11 @@ class Target BASE_EMBEDDED {
   }
 
   Target* previous() { return previous_; }
-  Node* node() { return node_; }
+  AstNode* node() { return node_; }
 
  private:
   Parser* parser_;
-  Node* node_;
+  AstNode* node_;
   Target* previous_;
 };
 

src/prettyprinter.cc

@@ -417,7 +417,7 @@ void PrettyPrinter::VisitThisFunction(ThisFunction* node) {
 }
 
 
-const char* PrettyPrinter::Print(Node* node) {
+const char* PrettyPrinter::Print(AstNode* node) {
   Init();
   Visit(node);
   return output_;
@@ -441,7 +441,7 @@ const char* PrettyPrinter::PrintProgram(FunctionLiteral* program) {
 }
 
 
-void PrettyPrinter::PrintOut(Node* node) {
+void PrettyPrinter::PrintOut(AstNode* node) {
   PrettyPrinter printer;
   PrintF("%s", printer.Print(node));
 }
@@ -700,7 +700,7 @@ void AstPrinter::PrintLabelsIndented(const char* info, ZoneStringList* labels) {
 }
 
 
-void AstPrinter::PrintIndentedVisit(const char* s, Node* node) {
+void AstPrinter::PrintIndentedVisit(const char* s, AstNode* node) {
   IndentedScope indent(s);
   Visit(node);
 }

src/prettyprinter.h

@@ -42,12 +42,12 @@ class PrettyPrinter: public AstVisitor {
 
   // The following routines print a node into a string.
   // The result string is alive as long as the PrettyPrinter is alive.
-  const char* Print(Node* node);
+  const char* Print(AstNode* node);
   const char* PrintExpression(FunctionLiteral* program);
   const char* PrintProgram(FunctionLiteral* program);
 
   // Print a node to stdout.
-  static void PrintOut(Node* node);
+  static void PrintOut(AstNode* node);
 
   // Individual nodes
 #define DEF_VISIT(type)                         \
@@ -92,7 +92,7 @@ class AstPrinter: public PrettyPrinter {
  private:
   friend class IndentedScope;
   void PrintIndented(const char* txt);
-  void PrintIndentedVisit(const char* s, Node* node);
+  void PrintIndentedVisit(const char* s, AstNode* node);
 
   void PrintStatements(ZoneList<Statement*>* statements);
   void PrintDeclarations(ZoneList<Declaration*>* declarations);

src/usage-analyzer.cc

@@ -42,7 +42,7 @@ static const int InitialWeight = 100;
 
 class UsageComputer: public AstVisitor {
  public:
-  static bool Traverse(Node* node);
+  static bool Traverse(AstNode* node);
 
   void VisitBlock(Block* node);
   void VisitDeclaration(Declaration* node);
@@ -116,7 +116,7 @@ class WeightScaler BASE_EMBEDDED {
 // ----------------------------------------------------------------------------
 // Implementation of UsageComputer
 
-bool UsageComputer::Traverse(Node* node) {
+bool UsageComputer::Traverse(AstNode* node) {
   UsageComputer uc(InitialWeight, false);
   uc.Visit(node);
   return !uc.HasStackOverflow();

src/x64/codegen-x64.h

@@ -361,7 +361,7 @@ class CodeGenerator: public AstVisitor {
 
 #define DEF_VISIT(type) \
   void Visit##type(type* node);
-  NODE_LIST(DEF_VISIT)
+  AST_NODE_LIST(DEF_VISIT)
 #undef DEF_VISIT
 
   // Visit a statement and then spill the virtual frame if control flow can
@@ -548,7 +548,7 @@ class CodeGenerator: public AstVisitor {
   // information.
   void CodeForFunctionPosition(FunctionLiteral* fun);
   void CodeForReturnPosition(FunctionLiteral* fun);
-  void CodeForStatementPosition(Node* node);
+  void CodeForStatementPosition(AstNode* node);
   void CodeForSourcePosition(int pos);
 
 #ifdef DEBUG