Allow lookup of module exports by export name.

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5205 matching lines @@
   v8::Handle<v8::Context> context = v8::Context::New(CcTest::isolate());
   v8::Context::Scope context_scope(context);
   isolate->stack_guard()->SetStackLimit(i::GetCurrentStackPosition() -
                                         128 * 1024);
 
   static const char kSource[] =
       "let x = 5; export { x as y }; import { q as z } from 'm.js';";
   i::Handle<i::String> source = factory->NewStringFromAsciiChecked(kSource);
   i::Handle<i::Script> script = factory->NewScript(source);
   i::CompilationInfoWithZone info(script);
+  i::Zone* zone = info.zone();
+  i::AstValueFactory avf(zone, isolate->heap()->HashSeed());
   i::Parser parser(&info, isolate->stack_guard()->real_climit(),
                    isolate->heap()->HashSeed(), isolate->unicode_cache());
   parser.set_allow_harmony_modules(true);
   parser.set_allow_harmony_scoping(true);
   info.MarkAsModule();
   CHECK(parser.Parse(&info));
   i::FunctionLiteral* func = info.function();
   CHECK_EQ(i::MODULE_SCOPE, func->scope()->scope_type());
   i::ModuleDescriptor* descriptor = func->scope()->module();
   CHECK_NOT_NULL(descriptor);
-  int num_exports = 0;
-  for (auto it = descriptor->iterator(); !it.done(); it.Advance()) {
-    ++num_exports;
-    CHECK(it.local_name()->IsOneByteEqualTo("x"));
-    CHECK(it.export_name()->IsOneByteEqualTo("y"));
-  }
-  CHECK_EQ(1, num_exports);
+  CHECK_EQ(1, descriptor->Length());
+  const i::AstRawString* export_name = avf.GetOneByteString("y");
+  const i::AstRawString* local_name =
+      descriptor->LookupLocalExport(export_name, zone);
+  CHECK_NOT_NULL(local_name);
+  CHECK(local_name->IsOneByteEqualTo("x"));
   i::ZoneList<i::Declaration*>* declarations = func->scope()->declarations();
   CHECK_EQ(2, declarations->length());
   CHECK(declarations->at(0)->proxy()->raw_name()->IsOneByteEqualTo("x"));
   i::ImportDeclaration* import_decl =
       declarations->at(1)->AsImportDeclaration();
   CHECK(import_decl->import_name()->IsOneByteEqualTo("q"));
   CHECK(import_decl->proxy()->raw_name()->IsOneByteEqualTo("z"));
   CHECK(import_decl->module_specifier()->IsOneByteEqualTo("m.js"));
 }
 
@@ skipping 285 matching lines @@
   static const ParserFlag always_flags[] = {
       kAllowStrongMode, kAllowHarmonyScoping
   };
   RunParserSyncTest(sloppy_context_data, data, kSuccess, NULL, 0, always_flags,
                     arraysize(always_flags));
   RunParserSyncTest(strict_context_data, data, kSuccess, NULL, 0, always_flags,
                     arraysize(always_flags));
   RunParserSyncTest(strong_context_data, data, kError, NULL, 0, always_flags,
                     arraysize(always_flags));
 }