Implement ES6 rest parameters

src/scopeinfo.cc

 // 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.
 
 #include <stdlib.h>
 
 #include "src/v8.h"
 
 #include "src/scopeinfo.h"
 #include "src/scopes.h"
 
 namespace v8 {
 namespace internal {
 
 
 Handle<ScopeInfo> ScopeInfo::Create(Isolate* isolate, Zone* zone,
                                     Scope* scope) {
   // Collect stack and context locals.
   ZoneList<Variable*> stack_locals(scope->StackLocalCount(), zone);
   ZoneList<Variable*> context_locals(scope->ContextLocalCount(), zone);
   scope->CollectStackAndContextLocals(&stack_locals, &context_locals);
   const int stack_local_count = stack_locals.length();
   const int context_local_count = context_locals.length();
   // Make sure we allocate the correct amount.
   DCHECK(scope->StackLocalCount() == stack_local_count);
   DCHECK(scope->ContextLocalCount() == context_local_count);
 
+  bool simple_parameter_list =
+      scope->is_function_scope() ? scope->is_simple_parameter_list() : true;
+
   // Determine use and location of the function variable if it is present.
   FunctionVariableInfo function_name_info;
   VariableMode function_variable_mode;
   if (scope->is_function_scope() && scope->function() != NULL) {
     Variable* var = scope->function()->proxy()->var();
     if (!var->is_used()) {
       function_name_info = UNUSED;
     } else if (var->IsContextSlot()) {
       function_name_info = CONTEXT;
     } else {
@@ skipping 15 matching lines @@
   Factory* factory = isolate->factory();
   Handle<ScopeInfo> scope_info = factory->NewScopeInfo(length);
 
   // Encode the flags.
   int flags = ScopeTypeField::encode(scope->scope_type()) |
               CallsEvalField::encode(scope->calls_eval()) |
               LanguageModeField::encode(scope->language_mode()) |
               FunctionVariableField::encode(function_name_info) |
               FunctionVariableMode::encode(function_variable_mode) |
               AsmModuleField::encode(scope->asm_module()) |
-              AsmFunctionField::encode(scope->asm_function());
+              AsmFunctionField::encode(scope->asm_function()) |
+              IsSimpleParameterListField::encode(simple_parameter_list);
   scope_info->SetFlags(flags);
   scope_info->SetParameterCount(parameter_count);
   scope_info->SetStackLocalCount(stack_local_count);
   scope_info->SetContextLocalCount(context_local_count);
 
   int index = kVariablePartIndex;
   // Add parameters.
   DCHECK(index == scope_info->ParameterEntriesIndex());
   for (int i = 0; i < parameter_count; ++i) {
     scope_info->set(index++, *scope->parameter(i)->name());
@@ skipping 492 matching lines @@
     } else {
       DCHECK(var->index() >= 0);
       info->set_index(i, var->index());
     }
   }
   DCHECK(i == info->length());
   return info;
 }
 
 } }  // namespace v8::internal