WIP: Parser: delay string internalization.

src/func-name-inferrer.h

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_FUNC_NAME_INFERRER_H_
 #define V8_FUNC_NAME_INFERRER_H_
 
 #include "handles.h"
 #include "zone.h"
 
 namespace v8 {
 namespace internal {
 
+class AstString;
+class AstStringTable;
 class FunctionLiteral;
-class Isolate;
 
 // FuncNameInferrer is a stateful class that is used to perform name
 // inference for anonymous functions during static analysis of source code.
 // Inference is performed in cases when an anonymous function is assigned
 // to a variable or a property (see test-func-name-inference.cc for examples.)
 //
 // The basic idea is that during parsing of LHSs of certain expressions
 // (assignments, declarations, object literals) we collect name strings,
 // and during parsing of the RHS, a function literal can be collected. After
 // parsing the RHS we can infer a name for function literals that do not have
 // a name.
 class FuncNameInferrer : public ZoneObject {
  public:
-  FuncNameInferrer(Isolate* isolate, Zone* zone);
+  FuncNameInferrer(AstStringTable* string_table, Zone* zone);
 
   // Returns whether we have entered name collection state.
   bool IsOpen() const { return !entries_stack_.is_empty(); }
 
   // Pushes an enclosing the name of enclosing function onto names stack.
-  void PushEnclosingName(Handle<String> name);
+  void PushEnclosingName(const AstString* name);
 
   // Enters name collection state.
   void Enter() {
     entries_stack_.Add(names_stack_.length(), zone());
   }
 
   // Pushes an encountered name onto names stack when in collection state.
-  void PushLiteralName(Handle<String> name);
+  void PushLiteralName(const AstString* name);
 
-  void PushVariableName(Handle<String> name);
+  void PushVariableName(const AstString* name);
 
   // Adds a function to infer name for.
   void AddFunction(FunctionLiteral* func_to_infer) {
     if (IsOpen()) {
       funcs_to_infer_.Add(func_to_infer, zone());
     }
   }
 
   void RemoveLastFunction() {
     if (IsOpen() && !funcs_to_infer_.is_empty()) {
@@ skipping 17 matching lines @@
       funcs_to_infer_.Clear();
   }
 
  private:
   enum NameType {
     kEnclosingConstructorName,
     kLiteralName,
     kVariableName
   };
   struct Name {
-    Name(Handle<String> name, NameType type) : name(name), type(type) { }
-    Handle<String> name;
+    Name(const AstString* name, NameType type) : name(name), type(type) {}
+    const AstString* name;
     NameType type;
   };
 
-  Isolate* isolate() { return isolate_; }
   Zone* zone() const { return zone_; }
 
   // Constructs a full name in dotted notation from gathered names.
-  Handle<String> MakeNameFromStack();
-
-  // A helper function for MakeNameFromStack.
-  Handle<String> MakeNameFromStackHelper(int pos, Handle<String> prev);
+  const AstString* MakeNameFromStack();
 
   // Performs name inferring for added functions.
   void InferFunctionsNames();
 
-  Isolate* isolate_;
+  AstStringTable* string_table_;
   ZoneList<int> entries_stack_;
   ZoneList<Name> names_stack_;
   ZoneList<FunctionLiteral*> funcs_to_infer_;
   Zone* zone_;
 
   DISALLOW_COPY_AND_ASSIGN(FuncNameInferrer);
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_FUNC_NAME_INFERRER_H_