Re: [boost] Newbie to Regex simple test failure...

From: John Maddock (john_at_[hidden])
Date: 2004-05-18 07:06:12

> I'm probably missing something obivous here.....So please fogive me if
it's
> a basic error.
>
> I am using regex for the first time on MSVC 6 and would like to create a
> simple function that could pass in a string and an expression to do a
> regular match on it.  I believe I have successfully compiled this library,
> but I don't understand why either of these simple functions are not
> working....
>
>  bool TestStr (std::string& szExpr, const std::string& szSearch)
> {
>  bool bResult=false;
>
>  boost::regex cExpr(szExpr);
>
>  bResult = boost::regex_match(szSearch, cExpr);
>
>  return bResult;
> }
>
> or
>
> bool TestStr2 (std::string& szExpr, std::string& szSearch)
> {
>   return boost::regex_match(szSearch, boost::regex(szExpr));
> }
>
> After debugging these routines, it appears thta the boost::regex
declaration
> fails (at least for the first function) returning a Kernel32.dll exception
> with some kind of address.
>
> The credit card example implies that the search and the regex example I
have
> observed keeps the regex expressions as constansts inside the function,
but
> I would like to be able to parse in my own string
>
> Questions?
>
> 1.  Wht doesn't any of the functions work?

I would guess there is an exception being thrown somewhere and not getting
caught, try:

 bool TestStr (const std::string& szExpr, const std::string& szSearch)
{
 bool bResult=false;
try{
 boost::regex cExpr(szExpr);
 bResult = boost::regex_match(szSearch, cExpr);
}
catch(const std::exception & e)
{
std::cout << e.what() << std::endl;
}
 return bResult;
}

John.