r278842 - Try to work around an MSVC 2013 bug around defaulted default ctors

[Reid Kleckner via cfe-commits]

Author: rnk
Date: Tue Aug 16 15:20:56 2016
New Revision: 278842

URL: http://llvm.org/viewvc/llvm-project?rev=278842&view=rev
Log:
Try to work around an MSVC 2013 bug around defaulted default ctors

An UnresolvedSetIterator() is supposed to be zeroed out, but MSVC 2013
does not do that.

Modified:
    cfe/trunk/include/clang/AST/UnresolvedSet.h

Modified: cfe/trunk/include/clang/AST/UnresolvedSet.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/UnresolvedSet.h?rev=278842&r1=278841&r2=278842&view=diff
==============================================================================
--- cfe/trunk/include/clang/AST/UnresolvedSet.h (original)
+++ cfe/trunk/include/clang/AST/UnresolvedSet.h Tue Aug 16 15:20:56 2016
@@ -38,7 +38,9 @@ class UnresolvedSetIterator : public llv
       : iterator_adaptor_base(const_cast<DeclAccessPair *>(Iter)) {}
 
 public:
-  UnresolvedSetIterator() = default;
+  // Work around a bug in MSVC 2013 where explicitly default constructed
+  // temporaries with defaulted ctors are not zero initialized.
+  UnresolvedSetIterator() : iterator_adaptor_base(nullptr) {}
 
   NamedDecl *getDecl() const { return I->getDecl(); }
   void setDecl(NamedDecl *ND) const { return I->setDecl(ND); }