Create ast/ and parsing/ subdirectories and move appropriate files

src/scopeinfo.h

-// Copyright 2011 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_SCOPEINFO_H_
-#define V8_SCOPEINFO_H_
-
-#include "src/allocation.h"
-#include "src/modules.h"
-#include "src/variables.h"
-
-namespace v8 {
-namespace internal {
-
-// Cache for mapping (data, property name) into context slot index.
-// The cache contains both positive and negative results.
-// Slot index equals -1 means the property is absent.
-// Cleared at startup and prior to mark sweep collection.
-class ContextSlotCache {
- public:
-  // Lookup context slot index for (data, name).
-  // If absent, kNotFound is returned.
-  int Lookup(Object* data, String* name, VariableMode* mode,
-             InitializationFlag* init_flag,
-             MaybeAssignedFlag* maybe_assigned_flag);
-
-  // Update an element in the cache.
-  void Update(Handle<Object> data, Handle<String> name, VariableMode mode,
-              InitializationFlag init_flag,
-              MaybeAssignedFlag maybe_assigned_flag, int slot_index);
-
-  // Clear the cache.
-  void Clear();
-
-  static const int kNotFound = -2;
-
- private:
-  ContextSlotCache() {
-    for (int i = 0; i < kLength; ++i) {
-      keys_[i].data = NULL;
-      keys_[i].name = NULL;
-      values_[i] = kNotFound;
-    }
-  }
-
-  inline static int Hash(Object* data, String* name);
-
-#ifdef DEBUG
-  void ValidateEntry(Handle<Object> data, Handle<String> name,
-                     VariableMode mode, InitializationFlag init_flag,
-                     MaybeAssignedFlag maybe_assigned_flag, int slot_index);
-#endif
-
-  static const int kLength = 256;
-  struct Key {
-    Object* data;
-    String* name;
-  };
-
-  struct Value {
-    Value(VariableMode mode, InitializationFlag init_flag,
-          MaybeAssignedFlag maybe_assigned_flag, int index) {
-      DCHECK(ModeField::is_valid(mode));
-      DCHECK(InitField::is_valid(init_flag));
-      DCHECK(MaybeAssignedField::is_valid(maybe_assigned_flag));
-      DCHECK(IndexField::is_valid(index));
-      value_ = ModeField::encode(mode) | IndexField::encode(index) |
-               InitField::encode(init_flag) |
-               MaybeAssignedField::encode(maybe_assigned_flag);
-      DCHECK(mode == this->mode());
-      DCHECK(init_flag == this->initialization_flag());
-      DCHECK(maybe_assigned_flag == this->maybe_assigned_flag());
-      DCHECK(index == this->index());
-    }
-
-    explicit inline Value(uint32_t value) : value_(value) {}
-
-    uint32_t raw() { return value_; }
-
-    VariableMode mode() { return ModeField::decode(value_); }
-
-    InitializationFlag initialization_flag() {
-      return InitField::decode(value_);
-    }
-
-    MaybeAssignedFlag maybe_assigned_flag() {
-      return MaybeAssignedField::decode(value_);
-    }
-
-    int index() { return IndexField::decode(value_); }
-
-    // Bit fields in value_ (type, shift, size). Must be public so the
-    // constants can be embedded in generated code.
-    class ModeField : public BitField<VariableMode, 0, 4> {};
-    class InitField : public BitField<InitializationFlag, 4, 1> {};
-    class MaybeAssignedField : public BitField<MaybeAssignedFlag, 5, 1> {};
-    class IndexField : public BitField<int, 6, 32 - 6> {};
-
-   private:
-    uint32_t value_;
-  };
-
-  Key keys_[kLength];
-  uint32_t values_[kLength];
-
-  friend class Isolate;
-  DISALLOW_COPY_AND_ASSIGN(ContextSlotCache);
-};
-
-
-
-
-//---------------------------------------------------------------------------
-// Auxiliary class used for the description of module instances.
-// Used by Runtime_DeclareModules.
-
-class ModuleInfo: public FixedArray {
- public:
-  static ModuleInfo* cast(Object* description) {
-    return static_cast<ModuleInfo*>(FixedArray::cast(description));
-  }
-
-  static Handle<ModuleInfo> Create(Isolate* isolate,
-                                   ModuleDescriptor* descriptor, Scope* scope);
-
-  // Index of module's context in host context.
-  int host_index() { return Smi::cast(get(HOST_OFFSET))->value(); }
-
-  // Name, mode, and index of the i-th export, respectively.
-  // For value exports, the index is the slot of the value in the module
-  // context, for exported modules it is the slot index of the
-  // referred module's context in the host context.
-  // TODO(rossberg): This format cannot yet handle exports of modules declared
-  // in earlier scripts.
-  String* name(int i) { return String::cast(get(name_offset(i))); }
-  VariableMode mode(int i) {
-    return static_cast<VariableMode>(Smi::cast(get(mode_offset(i)))->value());
-  }
-  int index(int i) { return Smi::cast(get(index_offset(i)))->value(); }
-
-  int length() { return (FixedArray::length() - HEADER_SIZE) / ITEM_SIZE; }
-
- private:
-  // The internal format is: Index, (Name, VariableMode, Index)*
-  enum {
-    HOST_OFFSET,
-    NAME_OFFSET,
-    MODE_OFFSET,
-    INDEX_OFFSET,
-    HEADER_SIZE = NAME_OFFSET,
-    ITEM_SIZE = INDEX_OFFSET - NAME_OFFSET + 1
-  };
-  inline int name_offset(int i) { return NAME_OFFSET + i * ITEM_SIZE; }
-  inline int mode_offset(int i) { return MODE_OFFSET + i * ITEM_SIZE; }
-  inline int index_offset(int i) { return INDEX_OFFSET + i * ITEM_SIZE; }
-
-  static Handle<ModuleInfo> Allocate(Isolate* isolate, int length) {
-    return Handle<ModuleInfo>::cast(
-        isolate->factory()->NewFixedArray(HEADER_SIZE + ITEM_SIZE * length));
-  }
-  void set_host_index(int index) { set(HOST_OFFSET, Smi::FromInt(index)); }
-  void set_name(int i, String* name) { set(name_offset(i), name); }
-  void set_mode(int i, VariableMode mode) {
-    set(mode_offset(i), Smi::FromInt(mode));
-  }
-  void set_index(int i, int index) {
-    set(index_offset(i), Smi::FromInt(index));
-  }
-};
-
-
-}  // namespace internal
-}  // namespace v8
-
-#endif  // V8_SCOPEINFO_H_