Remove llvm/ADT/NullablePtr.h, there are no uses of it in-tree.

llvm-svn: 186006

llvm/include/llvm/ADT/NullablePtr.h

@@ -1,62 +0,0 @@
-//===- llvm/ADT/NullablePtr.h - A pointer that allows null ------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines and implements the NullablePtr class.
-//
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_ADT_NULLABLEPTR_H
-#define LLVM_ADT_NULLABLEPTR_H
-
-#include "llvm/Support/type_traits.h"
-#include <cassert>
-#include <cstddef>
-
-namespace llvm {
-/// NullablePtr pointer wrapper - NullablePtr is used for APIs where a
-/// potentially-null pointer gets passed around that must be explicitly handled
-/// in lots of places.  By putting a wrapper around the null pointer, it makes
-/// it more likely that the null pointer case will be handled correctly.
-template<class T>
-class NullablePtr {
-  T *Ptr;
-  struct PlaceHolder {};
-
-public:
-  NullablePtr(T *P = 0) : Ptr(P) {}
-
-  template<typename OtherT>
-  NullablePtr(NullablePtr<OtherT> Other,
-              typename enable_if<
-                is_base_of<T, OtherT>,
-                PlaceHolder
-              >::type = PlaceHolder()) : Ptr(Other.getPtrOrNull()) {}
-  
-  bool isNull() const { return Ptr == 0; }
-  bool isNonNull() const { return Ptr != 0; }
-
-  /// get - Return the pointer if it is non-null.
-  const T *get() const {
-    assert(Ptr && "Pointer wasn't checked for null!");
-    return Ptr;
-  }
-
-  /// get - Return the pointer if it is non-null.
-  T *get() {
-    assert(Ptr && "Pointer wasn't checked for null!");
-    return Ptr;
-  }
-  
-  T *getPtrOrNull() { return Ptr; }
-  const T *getPtrOrNull() const { return Ptr; }
-};
-  
-} // end namespace llvm
-
-#endif