[strong] Class constructor bodies cannot contain "use strong" directive

test/cctest/test-parsing.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6080 matching lines @@
 
   RunParserSyncTest(sloppy_context_data, success_data, kError, NULL, 0,
                     always_flags, arraysize(always_flags));
   RunParserSyncTest(strict_context_data, success_data, kSuccess, NULL, 0,
                     always_flags, arraysize(always_flags));
   RunParserSyncTest(strong_context_data, success_data, kSuccess, NULL, 0,
                     always_flags, arraysize(always_flags));
 }
 
 
+TEST(StrongConstructorDirective) {
+  const char* context_data[][2] = {{"class c { ", " }"},
+                                   {"(class c { ", " });"},
+                                   {"let a = (class c { ", " });"},
+                                   {NULL}};
+
+  const char* error_data[] = {
+      "constructor() { \"use strong\" }",
+      "constructor(...rest) { \"use strong\" }",
+      "foo() {} constructor() { \"use strong\" }",
+      "foo(...rest) { \"use strict\" } constructor() { \"use strong\" }", NULL};
+
+  const char* success_data[] = {
+      "constructor() { \"use strict\" }", "foo() { \"use strong\" }",
+      "foo() { \"use strong\" } constructor() {}", NULL};
+
+  static const ParserFlag always_flags[] = {
+      kAllowHarmonyRestParameters, kAllowHarmonySloppy, kAllowHarmonySloppyLet,
+      kAllowStrongMode};
+
+  RunParserSyncTest(context_data, error_data, kError, NULL, 0, always_flags,
+                    arraysize(always_flags));
+  RunParserSyncTest(context_data, success_data, kSuccess, NULL, 0, always_flags,
+                    arraysize(always_flags));
+}
+
+
 TEST(StrongUndefinedLocal) {
   const char* context_data[][2] = {{"", ""}, {NULL}};
 
   const char* data[] = {
       "function undefined() {'use strong';}",
       "function* undefined() {'use strong';}",
       "(function undefined() {'use strong';});",
       "{foo: (function undefined(){'use strong';})};",
       "(function* undefined() {'use strong';})",
       "{foo: (function* undefined(){'use strong';})};",
@@ skipping 894 matching lines @@
       NULL};
 
   static const ParserFlag always_flags[] = {
       kAllowHarmonyArrowFunctions, kAllowHarmonyDefaultParameters,
       kAllowHarmonyDestructuring, kAllowHarmonyRestParameters,
       kAllowHarmonySloppy, kAllowStrongMode
   };
   RunParserSyncTest(context_data, data, kError, NULL, 0, always_flags,
                     arraysize(always_flags));
 }