Class error_codecvt

test/path_unit_test.cpp:845–883

  //  test_error_handling  -------------------------------------------------------------//

  class error_codecvt
    : public std::codecvt< wchar_t, char, std::mbstate_t >
  {
  public:
    explicit error_codecvt()
        : std::codecvt<wchar_t, char, std::mbstate_t>() {}
  protected:

    virtual bool do_always_noconv() const throw() { return false; }
    virtual int do_encoding() const throw() { return 0; }

    virtual std::codecvt_base::result do_in(std::mbstate_t&,
      const char*, const char*, const char*&,
      wchar_t*, wchar_t*, wchar_t*&) const
    {
      static std::codecvt_base::result r = std::codecvt_base::noconv;
      if (r == std::codecvt_base::partial) r = std::codecvt_base::error;
      else if (r == std::codecvt_base::error) r = std::codecvt_base::noconv;
      else r = std::codecvt_base::partial;
      return r;
    }

    virtual std::codecvt_base::result do_out(std::mbstate_t &,
      const wchar_t*, const wchar_t*, const wchar_t*&,
      char*, char*, char*&) const
    {
      static std::codecvt_base::result r = std::codecvt_base::noconv;
      if (r == std::codecvt_base::partial) r = std::codecvt_base::error;
      else if (r == std::codecvt_base::error) r = std::codecvt_base::noconv;
      else r = std::codecvt_base::partial;
      return r;
    }

    virtual std::codecvt_base::result do_unshift(std::mbstate_t&,
        char*, char*, char* &) const  { return ok; }
    virtual int do_length(std::mbstate_t &,
      const char*, const char*, std::size_t) const  { return 0; }
    virtual int do_max_length() const throw () { return 0; }
  };

  void test_error_handling()
  {