[es6] implement destructuring assignment [clean diff]

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index f0affc27985c5e8b68f7bfbd3e94755e9cb96426..aef799cbaf22ad7e995790d1a3bf12256b7107d4 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -922,6 +922,8 @@ Parser::Parser(ParseInfo* info)
   set_allow_harmony_default_parameters(FLAG_harmony_default_parameters);
   set_allow_harmony_spread_calls(FLAG_harmony_spread_calls);
   set_allow_harmony_destructuring(FLAG_harmony_destructuring);
+  set_allow_harmony_destructuring_assignment(
+      FLAG_harmony_destructuring_assignment);
   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);
@@ -3356,6 +3358,12 @@ void Parser::InitializeForEachStatement(ForEachStatement* stmt,
 }
 
 
+Expression* Parser::RewriteDestructuringAssignmentExpression(
+    Expression* expression) {
+  return expression;
+}
+
+
 Statement* Parser::DesugarLexicalBindingsInForStatement(
     Scope* inner_scope, bool is_const, ZoneList<const AstRawString*>* names,
     ForStatement* loop, Statement* init, Expression* cond, Statement* next,