Implement C++1y decltype(auto).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@180610 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Serialization/ASTWriter.cpp b/lib/Serialization/ASTWriter.cpp
index b6d25d2..c5a0550 100644
--- a/lib/Serialization/ASTWriter.cpp
+++ b/lib/Serialization/ASTWriter.cpp
@@ -245,6 +245,7 @@
 
 void ASTTypeWriter::VisitAutoType(const AutoType *T) {
   Writer.AddTypeRef(T->getDeducedType(), Record);
+  Record.push_back(T->isDecltypeAuto());
   Code = TYPE_AUTO;
 }