[destructuring] Implement BindingArrayPattern

src/parser.h

Index: src/parser.h
diff --git a/src/parser.h b/src/parser.h
index e3154f935fe455d86287b1412fe025ef8e4f6c0d..22b3a5d9f8d119824d70369f1a7320545e7d2fed 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -1007,7 +1007,7 @@ class Parser : public ParserBase<ParserTraits> {
       current_value_ = old_value;
     }
 
-    Variable* CreateTempVar(Expression* value);
+    Variable* CreateTempVar(Expression* value = nullptr);
 
     AstNodeFactory* factory() const { return descriptor_->parser->factory(); }
     AstValueFactory* ast_value_factory() const {
@@ -1055,6 +1055,12 @@ class Parser : public ParserBase<ParserTraits> {
   // Support for hamony block scoped bindings.
   Block* ParseScopedBlock(ZoneList<const AstRawString*>* labels, bool* ok);
 
+  // !%_IsSpecObject(result = iterator.next()) &&
+  //     %ThrowIteratorResultNotAnObject(result)
+  Expression* BuildIteratorNextResult(Expression* iterator, Variable* result,
+                                      int pos);
+
+
   // Initialize the components of a for-in / for-of statement.
   void InitializeForEachStatement(ForEachStatement* stmt,
                                   Expression* each,