tools/llvm-cxxdump/Error.cpp

   1 //===- Error.cpp - system_error extensions for llvm-cxxdump -----*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 // This defines a new error_category for the llvm-cxxdump tool.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "Error.h"
  14 #include "llvm/Support/ErrorHandling.h"
  15
  16 using namespace llvm;
  17
  18 namespace {
  19 // FIXME: This class is only here to support the transition to llvm::Error. It
  20 // will be removed once this transition is complete. Clients should prefer to
  21 // deal with the Error value directly, rather than converting to error_code.
  22 class cxxdump_error_category : public std::error_category {
  23 public:
  24   const char *name() const noexcept override { return "llvm.cxxdump"; }
  25   std::string message(int ev) const override {
  26     switch (static_cast<cxxdump_error>(ev)) {
  27     case cxxdump_error::success:
  28       return "Success";
  29     case cxxdump_error::file_not_found:
  30       return "No such file.";
  31     case cxxdump_error::unrecognized_file_format:
  32       return "Unrecognized file type.";
  33     }
  34     llvm_unreachable(
  35         "An enumerator of cxxdump_error does not have a message defined.");
  36   }
  37 };
  38 } // namespace
  39
  40 namespace llvm {
  41 const std::error_category &cxxdump_category() {
  42   static cxxdump_error_category o;
  43   return o;
  44 }
  45 } // namespace llvm