[es6] implement destructuring assignment

src/messages.h

 // Copyright 2006-2008 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.
 
 // The infrastructure used for (localized) message reporting in V8.
 //
 // Note: there's a big unresolved issue about ownership of the data
 // structures used by this framework.
 
 #ifndef V8_MESSAGES_H_
@@ skipping 309 matching lines @@
   T(ForOfLoopInitializer,                                                      \
     "for-of loop variable declaration may not have an initializer.")           \
   T(IllegalAccess, "Illegal access")                                           \
   T(IllegalBreak, "Illegal break statement")                                   \
   T(IllegalContinue, "Illegal continue statement")                             \
   T(IllegalLanguageModeDirective,                                              \
     "Illegal '%' directive in function with non-simple parameter list")        \
   T(IllegalReturn, "Illegal return statement")                                 \
   T(InvalidEscapedReservedWord, "Keyword must not contain escaped characters") \
   T(InvalidLhsInAssignment, "Invalid left-hand side in assignment")            \
+  T(InvalidCoverInitializedName, "Invalid shorthand property initializer")     \
+  T(InvalidDestructuringTarget, "Invalid destructuring assignment target")     \
   T(InvalidLhsInFor, "Invalid left-hand side in for-loop")                     \
   T(InvalidLhsInPostfixOp,                                                     \
     "Invalid left-hand side expression in postfix operation")                  \
   T(InvalidLhsInPrefixOp,                                                      \
     "Invalid left-hand side expression in prefix operation")                   \
   T(InvalidRegExpFlags, "Invalid flags supplied to RegExp constructor '%'")    \
   T(LabelRedeclaration, "Label '%' has already been declared")                 \
   T(MalformedArrowFunParamList, "Malformed arrow function parameter list")     \
   T(MalformedRegExp, "Invalid regular expression: /%/: %")                     \
   T(MalformedRegExpFlags, "Invalid regular expression flags")                  \
   T(ModuleExportUndefined, "Export '%' is not defined in module")              \
   T(MultipleDefaultsInSwitch,                                                  \
     "More than one default clause in switch statement")                        \
   T(NewlineAfterThrow, "Illegal newline after throw")                          \
   T(NoCatchOrFinally, "Missing catch or finally after try")                    \
   T(NotIsvar, "builtin %%IS_VAR: not a variable")                              \
   T(ParamAfterRest, "Rest parameter must be last formal parameter")            \
   T(PushPastSafeLength,                                                        \
     "Pushing % elements on an array-like of length % "                         \
     "is disallowed, as the total surpasses 2**53-1")                           \
+  T(ElementAfterRest, "Rest element must be last element in array")            \
   T(BadSetterRestParameter,                                                    \
     "Setter function argument must not be a rest parameter")                   \
   T(ParamDupe, "Duplicate parameter name not allowed in this context")         \
   T(ParenthesisInArgString, "Function arg string contains parenthesis")        \
   T(SingleFunctionLiteral, "Single function literal required")                 \
   T(SloppyLexical,                                                             \
     "Block-scoped declarations (let, const, function, class) not yet "         \
     "supported outside strict mode")                                           \
   T(StrictDelete, "Delete of an unqualified identifier in strict mode.")       \
   T(StrictEvalArguments, "Unexpected eval or arguments in strict mode")        \
@@ skipping 155 matching lines @@
   static MUST_USE_RESULT MaybeHandle<String> GetStringifiedProperty(
       Isolate* isolate, LookupIterator* property_lookup,
       Handle<String> default_value);
 
   List<Handle<JSObject> > visited_;
 };
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_MESSAGES_H_