Add Object/Error.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132909 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Object/Error.h

@@ -0,0 +1,49 @@
+//===- Error.h - system_error extensions for Object -------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This declares a new error_category for the Object library.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_OBJECT_ERROR_H
+#define LLVM_OBJECT_ERROR_H
+
+#include "llvm/Support/system_error.h"
+
+namespace llvm {
+namespace object {
+
+const error_category &object_category();
+
+struct object_error {
+enum _ {
+  success = 0,
+  invalid_file_type,
+  parse_failed
+};
+  _ v_;
+
+  object_error(_ v) : v_(v) {}
+  explicit object_error(int v) : v_(_(v)) {}
+  operator int() const {return v_;}
+};
+
+} // end namespace object.
+
+template <> struct is_error_code_enum<object::object_error> : true_type { };
+
+template <> struct is_error_code_enum<object::object_error::_> : true_type { };
+
+inline error_code make_error_code(object::object_error e) {
+  return error_code(static_cast<int>(e), object::object_category());
+}
+
+} // end namespace llvm.
+
+#endif