Re: unreachable code?

From:

"Gernot Frisch" <Me@Privacy.net>

Newsgroups:

comp.lang.c++

Date:

Thu, 27 Apr 2006 17:08:43 +0200

Message-ID:

<4bc4vfF10ippcU1@individual.net>

Could it be that in your compiler *somehow* exception handling is
disabled? Could it be that 'login' is declared with "throw()" (as
throwing nothing)? It's not your first day here. Post more code.

OK. I use VC++7.1. My compiler flags seem OK:
/Od /FD /EHsc /RTC1 /MTd /GS /c /ZI /Gd /TP

Here's the code (uncalled stuf removed)

extern "C"
{
int login( const char *);
int logout(const char *);
void lib_pexit(int);
SetFunctions(void*);
}

#define MAX_VERSION 2002
int g_Version = MAX_VERSION;

// get's called on error
void lib_pexit( int ErrorCode )
{
  throw (1); // C4297 unexpected exception raised
}

int CheckFeature(const char* progstring, double version)
{
SetFunctions((void*)&lib_pexit); // register "lib_pexit" function

for (int nVersion = (int)version; nVersion<=tm.wYear+3; nVersion++)
{
  g_Version = nVersion;
  try
  {
   if (login(progstring) > 0)
   {
    g_Version = MAX_VERSION;
    return 1; // OK
   }
  }
  catch(int) // no hardlock
  {
   try
   {
    logout(NULL);
   }
   catch(int)
   {;}
   g_Version = MAX_VERSION; // C4702 unreachable code
  }
}
g_Version = MAX_VERSION; // C4702 unreachable code
return 0;
}