[es6] Re-implement rest parameters via desugaring.

src/full-codegen/full-codegen.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/ast.h"
 #include "src/ast-numbering.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
 #include "src/debug/debug.h"
@@ skipping 430 matching lines @@
   // TODO(rossberg)
 }
 
 
 void FullCodeGenerator::VisitVariableProxy(VariableProxy* expr) {
   Comment cmnt(masm_, "[ VariableProxy");
   EmitVariableLoad(expr);
 }
 
 
+void FullCodeGenerator::VisitRestParameter(RestParameter* node) {
+  UNREACHABLE();
+}
+
+
 int FullCodeGenerator::DeclareGlobalsFlags() {
   DCHECK(DeclareGlobalsLanguageMode::is_valid(language_mode()));
   return DeclareGlobalsEvalFlag::encode(is_eval()) |
          DeclareGlobalsNativeFlag::encode(is_native()) |
          DeclareGlobalsLanguageMode::encode(language_mode());
 }
 
 
 void FullCodeGenerator::EmitSubString(CallRuntime* expr) {
   // Load the arguments on the stack and call the stub.
@@ skipping 1127 matching lines @@
   codegen_->PrepareForBailoutForId(exit_id_, NO_REGISTERS);
   codegen_->scope_ = saved_scope_;
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8