Parsing binding patterns.

src/parser.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/v8.h"
 
 #include "src/api.h"
 #include "src/ast.h"
 #include "src/bailout-reason.h"
 #include "src/base/platform/platform.h"
@@ skipping 854 matching lines @@
   set_allow_harmony_modules(!info->is_native() && FLAG_harmony_modules);
   set_allow_harmony_arrow_functions(FLAG_harmony_arrow_functions);
   set_allow_harmony_classes(FLAG_harmony_classes);
   set_allow_harmony_object_literals(FLAG_harmony_object_literals);
   set_allow_harmony_sloppy(FLAG_harmony_sloppy);
   set_allow_harmony_unicode(FLAG_harmony_unicode);
   set_allow_harmony_computed_property_names(
       FLAG_harmony_computed_property_names);
   set_allow_harmony_rest_params(FLAG_harmony_rest_parameters);
   set_allow_harmony_spreadcalls(FLAG_harmony_spreadcalls);
+  set_allow_harmony_destructuring(FLAG_harmony_destructuring);
   set_allow_strong_mode(FLAG_strong_mode);
   for (int feature = 0; feature < v8::Isolate::kUseCounterFeatureCount;
        ++feature) {
     use_counts_[feature] = 0;
   }
   if (info->ast_value_factory() == NULL) {
     // info takes ownership of AstValueFactory.
     info->set_ast_value_factory(new AstValueFactory(zone(), info->hash_seed()));
     info->set_ast_value_factory_owned();
     ast_value_factory_ = info->ast_value_factory();
@@ skipping 1495 matching lines @@
     {
       ExpressionClassifier pattern_classifier;
       Token::Value next = peek();
       Expression* pattern =
           ParsePrimaryExpression(&pattern_classifier, CHECK_OK);
       ValidateBindingPattern(&pattern_classifier, CHECK_OK);
       if (pattern->IsVariableProxy() &&
           pattern->AsVariableProxy()->IsValidReferenceExpression()) {
         scope_->RemoveUnresolved(pattern->AsVariableProxy());
         name = pattern->AsVariableProxy()->raw_name();
+      } else if (allow_harmony_destructuring()) {
+        // TODO(dslomov): really destructure.
+        name = ast_value_factory()->GetOneByteString(".temp.variable");
       } else {
         ReportUnexpectedToken(next);
         *ok = false;
         return nullptr;
       }
     }
 
     if (!first_name) first_name = name;
     Scanner::Location variable_loc = scanner()->location();
     if (fni_ != NULL) fni_->PushVariableName(name);
@@ skipping 1928 matching lines @@
     reusable_preparser_->set_allow_harmony_object_literals(
         allow_harmony_object_literals());
     reusable_preparser_->set_allow_harmony_sloppy(allow_harmony_sloppy());
     reusable_preparser_->set_allow_harmony_unicode(allow_harmony_unicode());
     reusable_preparser_->set_allow_harmony_computed_property_names(
         allow_harmony_computed_property_names());
     reusable_preparser_->set_allow_harmony_rest_params(
         allow_harmony_rest_params());
     reusable_preparser_->set_allow_harmony_spreadcalls(
         allow_harmony_spreadcalls());
+    reusable_preparser_->set_allow_harmony_destructuring(
+        allow_harmony_destructuring());
     reusable_preparser_->set_allow_strong_mode(allow_strong_mode());
   }
   PreParser::PreParseResult result = reusable_preparser_->PreParseLazyFunction(
       language_mode(), function_state_->kind(), logger);
   if (pre_parse_timer_ != NULL) {
     pre_parse_timer_->Stop();
   }
   return result;
 }
 
@@ skipping 1491 matching lines @@
 
 Expression* Parser::SpreadCallNew(Expression* function,
                                   ZoneList<v8::internal::Expression*>* args,
                                   int pos) {
   args->InsertAt(0, function, zone());
 
   return factory()->NewCallRuntime(
       ast_value_factory()->reflect_construct_string(), NULL, args, pos);
 }
 } }  // namespace v8::internal