Teach ModuleDescriptor about basic local exports

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/v8.h"
 
 #include "src/modules.h"
 
 #include "src/ast-value-factory.h"
 
 namespace v8 {
 namespace internal {
 
-// ---------------------------------------------------------------------------
-// Addition.
 
-void ModuleDescriptor::Add(const AstRawString* name, Zone* zone, bool* ok) {
-  void* key = const_cast<AstRawString*>(name);
+void ModuleDescriptor::AddLocalExport(const AstRawString* export_name,
+                                      const AstRawString* local_name,
+                                      Zone* zone, bool* ok) {
+  void* key = const_cast<AstRawString*>(export_name);
 
-  ZoneHashMap** map = &exports_;
   ZoneAllocationPolicy allocator(zone);
 
-  if (*map == nullptr) {
-    *map = new (zone->New(sizeof(ZoneHashMap)))
+  if (exports_ == nullptr) {
+    exports_ = new (zone->New(sizeof(ZoneHashMap)))
         ZoneHashMap(ZoneHashMap::PointersMatch,
                     ZoneHashMap::kDefaultHashMapCapacity, allocator);
   }
 
   ZoneHashMap::Entry* p =
-      (*map)->Lookup(key, name->hash(), !IsFrozen(), allocator);
+      exports_->Lookup(key, export_name->hash(), !IsFrozen(), allocator);
   if (p == nullptr || p->value != nullptr) {
     *ok = false;
   }
 
-  p->value = key;
+  p->value = const_cast<AstRawString*>(local_name);
 }
 }
 }  // namespace v8::internal