CODEWITHSUNDEEP
c++exception
cybertextron
cybertextron

Reputation: 10971

correct way to catch a created exception

I have the following class exception:

namespace A{
 namespace B{
   namespace C{
     class internal_error : public std::runtime_error{
        public:
             explicit internal_error(const std::string &arg) : std::runtime_error(arg) {};
     };
    }
   }
  }

And in my code I have:

try{
  if(mkdipath(dirname, DIR_CREATION_MODE, &err)){
       string msg;
       msg = "failed to create path " + *dirname;
       logmsg(MSERROR, msg.c_str(), who);
       throw A::B::C::internal_error(msg);
  }
}
catch(){
    // how am I going to catch a A::B::C::internal_error?
}

My question is : how am I going to catch a A::B::C::internal_error? Should I use:

catch(A::B::C::internal_error &error){
      string msg("You should never had happened\n");
      logmsg(MSERROR, msg.c_str(), who);
}

Please ignore the tags MSERROR, who, mkdirpath ... they are not important to the question.

Upvotes: 0

Views: 100

Answers (2)

Fahid Mohammad
Fahid Mohammad

Reputation: 930

try{
// ...
} catch (const A::internal_error& ex) {
// ...
} catch (const B::internal_error& ex) {
// ...
} catch (const C::internal_error& ex) {
// ...
}

Is this what you are looking for?

Upvotes: 0

yuri kilochek
yuri kilochek

Reputation: 13484

catch(A::B::C::internal_error &error){
    //...
}

is fine, note sure where the leading underscore came from, probably a typo.

Upvotes: 1

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