Implement C++0x nullptr.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71405 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 1 deletions

diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index e6b8056a42..50330e3f63 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -621,7 +621,8 @@ Sema::IsStandardConversion(Expr* From, QualType ToType,
             FromType->isEnumeralType() ||
             FromType->isPointerType() ||
             FromType->isBlockPointerType() ||
-            FromType->isMemberPointerType())) {
+            FromType->isMemberPointerType() ||
+            FromType->isNullPtrType())) {
     SCS.Second = ICK_Boolean_Conversion;
     FromType = Context.BoolTy;
   }
@@ -898,6 +899,13 @@ bool Sema::IsPointerConversion(Expr *From, QualType FromType, QualType ToType,
     return true;
   }
 
+  // If the left-hand-side is nullptr_t, the right side can be a null
+  // pointer constant.
+  if (ToType->isNullPtrType() && From->isNullPointerConstant(Context)) {
+    ConvertedType = ToType;
+    return true;
+  }
+
   const PointerType* ToTypePtr = ToType->getAsPointerType();
   if (!ToTypePtr)
     return false;