libcxx initial import

llvm-svn: 103490

1 files changed, 88 insertions, 0 deletions

diff --git a/libcxx/include/cstddef b/libcxx/include/cstddef
new file mode 100644
index 000000000000..6b0a1c71db40
--- /dev/null
+++ b/libcxx/include/cstddef
@@ -0,0 +1,88 @@
+// -*- C++ -*-
+//===--------------------------- cstddef ----------------------------------===//
+//
+// ÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊÊThe LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef _LIBCPP_CSTDDEF
+#define _LIBCPP_CSTDDEF
+
+/*
+    cstddef synopsis
+
+Macros:
+
+    offsetof(type,member-designator)
+    NULL
+ 
+namespace std
+{
+
+Types:
+
+    ptrdiff_t
+    size_t
+    max_align_t
+    nullptr_t
+
+}  // std
+
+*/
+
+#include <__config>
+#include <stddef.h>
+
+#pragma GCC system_header
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+using ::ptrdiff_t;
+using ::size_t;
+
+typedef long double max_align_t;
+
+#ifdef _LIBCPP_HAS_NO_NULLPTR
+
+struct nullptr_t
+{
+    void* _;
+
+    struct __nat {int __for_bool_;};
+
+    _LIBCPP_ALWAYS_INLINE nullptr_t(int __nat::*) {}
+
+    _LIBCPP_ALWAYS_INLINE operator int __nat::*() const {return 0;}
+
+    template <class T>
+        _LIBCPP_ALWAYS_INLINE 
+        operator T* () const {return 0;}
+
+    template <class T, class U>
+        _LIBCPP_ALWAYS_INLINE 
+        operator T U::* () const {return 0;}
+
+    friend _LIBCPP_ALWAYS_INLINE bool operator==(nullptr_t, nullptr_t) {return true;}
+    friend _LIBCPP_ALWAYS_INLINE bool operator!=(nullptr_t, nullptr_t) {return false;}
+    friend _LIBCPP_ALWAYS_INLINE bool operator<(nullptr_t, nullptr_t) {return false;}
+    friend _LIBCPP_ALWAYS_INLINE bool operator<=(nullptr_t, nullptr_t) {return true;}
+    friend _LIBCPP_ALWAYS_INLINE bool operator>(nullptr_t, nullptr_t) {return false;}
+    friend _LIBCPP_ALWAYS_INLINE bool operator>=(nullptr_t, nullptr_t) {return true;}
+};
+
+inline _LIBCPP_ALWAYS_INLINE nullptr_t __get_nullptr_t() {return nullptr_t(0);}
+
+#define nullptr _STD::__get_nullptr_t()
+
+#else
+
+typedef decltype(nullptr) nullptr_t;
+
+#endif
+
+_LIBCPP_END_NAMESPACE_STD
+
+#endif  // _LIBCPP_CSTDDEF