[es6] Parsing of new.target

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 738 matching lines @@
 }
 
 
 Expression* ParserTraits::ThisExpression(Scope* scope, AstNodeFactory* factory,
                                          int pos) {
   return scope->NewUnresolved(factory,
                               parser_->ast_value_factory()->this_string(),
                               Variable::THIS, pos, pos + 4);
 }
 
+
 Expression* ParserTraits::SuperPropertyReference(Scope* scope,
                                                  AstNodeFactory* factory,
                                                  int pos) {
   // this_function[home_object_symbol]
   VariableProxy* this_function_proxy = scope->NewUnresolved(
       factory, parser_->ast_value_factory()->this_function_string(),
       Variable::NORMAL, pos);
   Expression* home_object_symbol_literal =
       factory->NewSymbolLiteral("home_object_symbol", RelocInfo::kNoPosition);
   Expression* home_object = factory->NewProperty(
@@ skipping 10 matching lines @@
       Variable::NORMAL, pos);
   VariableProxy* this_function_proxy = scope->NewUnresolved(
       factory, parser_->ast_value_factory()->this_function_string(),
       Variable::NORMAL, pos);
   return factory->NewSuperCallReference(
       ThisExpression(scope, factory, pos)->AsVariableProxy(), new_target_proxy,
       this_function_proxy, pos);
 }
 
 
+Expression* ParserTraits::NewTargetExpression(Scope* scope,
+                                              AstNodeFactory* factory,
+                                              int pos) {
+  return scope->NewUnresolved(factory,
+                              parser_->ast_value_factory()->new_target_string(),
+                              Variable::NORMAL, pos, pos + 10);

[arv (Not doing code reviews), 2015/06/08 19:56:44]

Is there a way to get the length of "new.target" at compile time?

[Dmitry Lomov (no reviews), 2015/06/09 09:57:23]

Maybe add a constant?

+}
+
+
 Expression* ParserTraits::DefaultConstructor(bool call_super, Scope* scope,
                                              int pos, int end_pos) {
   return parser_->DefaultConstructor(call_super, scope, pos, end_pos);
 }
 
 
 Literal* ParserTraits::ExpressionFromLiteral(Token::Value token, int pos,
                                              Scanner* scanner,
                                              AstNodeFactory* factory) {
   switch (token) {
@@ skipping 104 matching lines @@
   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_harmony_spread_arrays(FLAG_harmony_spread_arrays);
+  set_allow_harmony_new_target(FLAG_harmony_new_target);
   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 3356 matching lines @@
   // main thread preparse times.
   if (pre_parse_timer_ != NULL) {
     pre_parse_timer_->Start();
   }
   DCHECK_EQ(Token::LBRACE, scanner()->current_token());
 
   if (reusable_preparser_ == NULL) {
     reusable_preparser_ = new PreParser(zone(), &scanner_, ast_value_factory(),
                                         NULL, stack_limit_);
     reusable_preparser_->set_allow_lazy(true);
-    reusable_preparser_->set_allow_natives(allow_natives());
-    reusable_preparser_->set_allow_harmony_modules(allow_harmony_modules());
-    reusable_preparser_->set_allow_harmony_arrow_functions(
-        allow_harmony_arrow_functions());
-    reusable_preparser_->set_allow_harmony_classes(allow_harmony_classes());
-    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_harmony_spread_arrays(
-        allow_harmony_spread_arrays());
-    reusable_preparser_->set_allow_strong_mode(allow_strong_mode());
+#define SET_ALLOW(name) reusable_preparser_->set_allow_##name(allow_##name());
+    SET_ALLOW(natives);
+    SET_ALLOW(harmony_modules);
+    SET_ALLOW(harmony_arrow_functions);
+    SET_ALLOW(harmony_classes);
+    SET_ALLOW(harmony_object_literals);
+    SET_ALLOW(harmony_sloppy);
+    SET_ALLOW(harmony_unicode);
+    SET_ALLOW(harmony_computed_property_names);
+    SET_ALLOW(harmony_rest_params);
+    SET_ALLOW(harmony_spreadcalls);
+    SET_ALLOW(harmony_destructuring);
+    SET_ALLOW(harmony_spread_arrays);
+    SET_ALLOW(harmony_new_target);
+    SET_ALLOW(strong_mode);
+#undef SET_ALLOW
   }
   PreParser::PreParseResult result = reusable_preparser_->PreParseLazyFunction(
       language_mode(), function_state_->kind(), logger, bookmark);
   if (pre_parse_timer_ != NULL) {
     pre_parse_timer_->Stop();
   }
   return result;
 }
 
 
@@ skipping 1503 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 internal
 }  // namespace v8