Add an emplace(...) method to llvm::Optional<T>.

[oota-llvm.git] / include / llvm / ADT / PointerUnion.h

diff --git a/include/llvm/ADT/PointerUnion.h b/include/llvm/ADT/PointerUnion.h
index dafd0e05109399fd3d23aa4fd3b275325145807b..a6dddd277621806a12cac918a0d86ce3f0abcf84 100644 (file)
--- a/include/llvm/ADT/PointerUnion.h
+++ b/include/llvm/ADT/PointerUnion.h
@@ -154,6 +154,12 @@ namespace llvm {
          "Can't get the address because PointerLikeTypeTraits changes the ptr");
       return (PT1 *)Val.getAddrOfPointer();
     }
+
+    /// \brief Assignment from nullptr which just clears the union.
+    const PointerUnion &operator=(std::nullptr_t) {
+      Val.initWithPointer(nullptr);
+      return *this;
+    }
     
     /// Assignment operators - Allow assigning into this union from either
     /// pointer type, setting the discriminator to remember what it came from.
@@ -298,6 +304,12 @@ namespace llvm {
       if (is<T>()) return get<T>();
       return T();
     }
+
+    /// \brief Assignment from nullptr which just clears the union.
+    const PointerUnion3 &operator=(std::nullptr_t) {
+      Val = nullptr;
+      return *this;
+    }
     
     /// Assignment operators - Allow assigning into this union from either
     /// pointer type, setting the discriminator to remember what it came from.
@@ -407,6 +419,12 @@ namespace llvm {
       if (is<T>()) return get<T>();
       return T();
     }
+
+    /// \brief Assignment from nullptr which just clears the union.
+    const PointerUnion4 &operator=(std::nullptr_t) {
+      Val = nullptr;
+      return *this;
+    }
     
     /// Assignment operators - Allow assigning into this union from either
     /// pointer type, setting the discriminator to remember what it came from.