[es6] implement destructuring assignment

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/full-codegen/full-codegen.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 1467 matching lines @@
       break;
   }
 
 #ifdef DEBUG
   // RecordJSReturnSite should have been called.
   DCHECK(expr->return_is_recorded_);
 #endif
 }
 
 
+void FullCodeGenerator::VisitAssignmentPattern(AssignmentPattern* pattern) {
+  Visit(pattern->expression());
+}
+
+
 void FullCodeGenerator::VisitSpread(Spread* expr) { UNREACHABLE(); }
 
 
 void FullCodeGenerator::VisitEmptyParentheses(EmptyParentheses* expr) {
   UNREACHABLE();
 }
 
 
 FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit(
     int* stack_depth, int* context_length) {
@@ skipping 238 matching lines @@
   return var->mode() == CONST_LEGACY || var->scope()->is_nonlinear() ||
          var->initializer_position() >= proxy->position();
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8