tools/llvm-cxxdump/Error.cpp

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