[strong] Keep language mode consistent

src/preparser.cc

 // Copyright 2011 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 <cmath>
 
 #include "src/allocation.h"
 #include "src/base/logging.h"
 #include "src/conversions-inl.h"
 #include "src/conversions.h"
@@ skipping 235 matching lines @@
           super_loc.beg_pos != token_loc.beg_pos) {
         ReportMessageAt(super_loc, MessageTemplate::kStrongConstructorSuper);
         *ok = false;
         return;
       }
     }
 
     if (directive_prologue) {
       if (statement.IsUseStrictLiteral()) {
         scope_->SetLanguageMode(
-            static_cast<LanguageMode>(scope_->language_mode() | STRICT_BIT));
+            static_cast<LanguageMode>(scope_->language_mode() | STRICT));
       } else if (statement.IsUseStrongLiteral() && allow_strong_mode()) {
         scope_->SetLanguageMode(static_cast<LanguageMode>(
-            scope_->language_mode() | STRICT_BIT | STRONG_BIT));
+            scope_->language_mode() | STRONG));
       } else if (!statement.IsStringLiteral()) {
         directive_prologue = false;
       }
     }
 
     // If we're allowed to reset to a bookmark, we will do so when we see a long
     // and trivial function.
     // Our current definition of 'long and trivial' is:
     // - over 200 statements
     // - all starting with an identifier (i.e., no if, for, while, etc.)
@@ skipping 874 matching lines @@
   LanguageMode class_language_mode = language_mode();
   if (is_strong(class_language_mode) && IsUndefined(name)) {
     ReportMessageAt(class_name_location, MessageTemplate::kStrongUndefined);
     *ok = false;
     return EmptyExpression();
   }
 
   Scope* scope = NewScope(scope_, BLOCK_SCOPE);
   BlockState block_state(&scope_, scope);
   scope_->SetLanguageMode(
-      static_cast<LanguageMode>(class_language_mode | STRICT_BIT));
+      static_cast<LanguageMode>(class_language_mode | STRICT));
   // TODO(marja): Make PreParser use scope names too.
   // scope_->SetScopeName(name);
 
   bool has_extends = Check(Token::EXTENDS);
   if (has_extends) {
     ExpressionClassifier classifier;
     ParseLeftHandSideExpression(&classifier, CHECK_OK);
     ValidateExpression(&classifier, CHECK_OK);
   }
 
@@ skipping 37 matching lines @@
 
   DCHECK(!spread_pos.IsValid());
 
   return Expression::Default();
 }
 
 #undef CHECK_OK
 
 
 } }  // v8::internal