llvm-cxxdump: Rename llvm-vtabledump to llvm-cxxdump

llvm-vtabledump has grown enough functionality not related to vtables
that it deserves a name which is more descriptive.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@232301 91177308-0d34-0410-b5e6-96231b3b80d8

tools/llvm-cxxdump/Error.h

@@ -0,0 +1,39 @@
+//===- Error.h - system_error extensions for llvm-cxxdump -------*- 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 llvm-cxxdump tool.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TOOLS_LLVM_CXXDUMP_ERROR_H
+#define LLVM_TOOLS_LLVM_CXXDUMP_ERROR_H
+
+#include <system_error>
+
+namespace llvm {
+const std::error_category &cxxdump_category();
+
+enum class cxxdump_error {
+  success = 0,
+  file_not_found,
+  unrecognized_file_format,
+};
+
+inline std::error_code make_error_code(cxxdump_error e) {
+  return std::error_code(static_cast<int>(e), cxxdump_category());
+}
+
+} // namespace llvm
+
+namespace std {
+template <>
+struct is_error_code_enum<llvm::cxxdump_error> : std::true_type {};
+}
+
+#endif