Active Error Codes

// ErrCodeTest.cpp : Example code for using ActiveErrors.h
// Written by Stuart Dootson (c) 2009
//
// This code is made available under the CodeProject Open License (http://www.codeproject.com/info/cpol10.aspx)

#include <Windows.h>
#include <string>
#include <stdexcept>
#include <iostream>

#if defined(_MSC_VER)
#include <crtdbg.h>
#else
inline void local_assert(bool b, std::string const& s)
{
   if (!b) throw std::runtime_error((s + ": assertion failed ").c_str());
}
#define _ASSERTE(expr)  local_assert((expr), #expr)
#endif

#include "ActiveErrors.h"


bool HRIsGood(HRESULT hr) { return SUCCEEDED(hr); }

typedef ErrCodeWithFn<HRESULT, &HRIsGood> eHRESULT;

eHRESULT Test(bool isGood)
{
   return isGood?S_OK:E_UNEXPECTED;
}

typedef ErrCodeWithGoodValue<int, 0> Err;

Err Test2(bool isGood)
{
   int e = isGood?(Err::value):(Err::value+1);
   return Err(e);
}

int main(int argc, char* argv[])
{
   int testNum = 1;
   try
   {
      eHRESULT ev = Test(false);
      eHRESULT errValue(Test(true));
      if (SUCCEEDED(errValue))
      {
         std::cerr << testNum << " OK" << std::endl;
         _ASSERTE(true);
      }
      else
      {
         std::cerr << testNum << " Bad" << std::endl;
         _ASSERTE(false);
      }
   }
   catch (UncheckedErrorBase&)
   {
      std::cerr << testNum << " OK" << std::endl;
      _ASSERTE(true);
   }
   ++testNum;
   try
   {
      Test(false);
      std::cerr << testNum << " Bad" << std::endl;
      _ASSERTE(false);
   }
   catch (UncheckedErrorBase&)
   {
      std::cerr << testNum << " OK" << std::endl;
      _ASSERTE(true);
   }
   ++testNum;
   try
   {
      if (Test(false).good())
      {
         std::cerr << testNum << " Bad" << std::endl;
         _ASSERTE(false);
      }
      else
      {
         std::cerr << testNum << " OK" << std::endl;
         _ASSERTE(true);
      }
   }
   catch (UncheckedErrorBase&)
   {
      std::cerr << testNum << " Bad" << std::endl;
      _ASSERTE(false);
   }
   ++testNum;
   try
   {
      Test2(true);
      std::cerr << testNum << " OK" << std::endl;
      _ASSERTE(true);
   }
   catch (UncheckedErrorBase&)
   {
      std::cerr << testNum << " Bad" << std::endl;
      _ASSERTE(false);
   }
   ++testNum;
   try
   {
      Test2(false);
      std::cerr << testNum << " Bad" << std::endl;
      _ASSERTE(false);
   }
   catch (UncheckedErrorBase&)
   {
      std::cerr << testNum << " OK" << std::endl;
      _ASSERTE(true);
   }
   ++testNum;
   try
   {
      if (Test2(false).good())
      {
         std::cerr << testNum << " Bad" << std::endl;
         _ASSERTE(false);
      }
      else
      {
         std::cerr << testNum << " OK" << std::endl;
         _ASSERTE(true);
      }
   }
   catch (UncheckedErrorBase&)
   {
      std::cerr << testNum << " Bad" << std::endl;
      _ASSERTE(false);
   }
   ++testNum;
   return 0;
}