Create ast/ and parsing/ subdirectories and move appropriate files

src/modules.cc

-// Copyright 2012 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.
-
-#include "src/modules.h"
-
-#include "src/ast-value-factory.h"
-
-namespace v8 {
-namespace internal {
-
-
-void ModuleDescriptor::AddLocalExport(const AstRawString* export_name,
-                                      const AstRawString* local_name,
-                                      Zone* zone, bool* ok) {
-  DCHECK(!IsFrozen());
-  void* key = const_cast<AstRawString*>(export_name);
-
-  ZoneAllocationPolicy allocator(zone);
-
-  if (exports_ == nullptr) {
-    exports_ = new (zone->New(sizeof(ZoneHashMap)))
-        ZoneHashMap(ZoneHashMap::PointersMatch,
-                    ZoneHashMap::kDefaultHashMapCapacity, allocator);
-  }
-
-  ZoneHashMap::Entry* p =
-      exports_->LookupOrInsert(key, export_name->hash(), allocator);
-  DCHECK_NOT_NULL(p);
-  if (p->value != nullptr) {
-    // Duplicate export.
-    *ok = false;
-    return;
-  }
-
-  p->value = const_cast<AstRawString*>(local_name);
-}
-
-
-void ModuleDescriptor::AddModuleRequest(const AstRawString* module_specifier,
-                                        Zone* zone) {
-  // TODO(adamk): Avoid this O(N) operation on each insert by storing
-  // a HashMap, or by de-duping after parsing.
-  if (requested_modules_.Contains(module_specifier)) return;
-  requested_modules_.Add(module_specifier, zone);
-}
-
-
-const AstRawString* ModuleDescriptor::LookupLocalExport(
-    const AstRawString* export_name, Zone* zone) {
-  if (exports_ == nullptr) return nullptr;
-  ZoneHashMap::Entry* entry = exports_->Lookup(
-      const_cast<AstRawString*>(export_name), export_name->hash());
-  if (entry == nullptr) return nullptr;
-  DCHECK_NOT_NULL(entry->value);
-  return static_cast<const AstRawString*>(entry->value);
-}
-}  // namespace internal
-}  // namespace v8