Making an Initializer List Exception-Safe - C++ Class

C++ examples for Class:Constructor

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Description

Making an Initializer List Exception-Safe

Demo Code

#include <iostream>
#include <stdexcept>

using namespace std;

// Some device/*from  w  w w .  j  a  v  a2  s. co m*/
class Device {
public:
   Device(int devno) {
      if (devno == 2)
         throw runtime_error("Big problem");
   }
  ~Device() {}
private:
   Device();
};

class Broker {

public:
   Broker (int devno1, int devno2)
      try : dev1_(Device(devno1)),   // Create these in the initializer
            dev2_(Device(devno2)) {} // list.
      catch (...) {
         throw; // Log the message or translate the error here (see

                // the discussion)
      }
  ~Broker() {}

private:
   Broker();
   Device dev1_;
   Device dev2_;
};

int main() {
   try {
      Broker b(1, 2);
   }
   catch(exception& e) {
      cerr << "Exception: " << e.what() << endl;
   }
}

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